FinT
Dependencies: mbed RF24Network RF24
Revision 0:3982c0e9eda1, committed 2015-07-06
- Comitter:
- akashvibhute
- Date:
- Mon Jul 06 03:17:33 2015 +0000
- Child:
- 1:5be48a9550c3
- Commit message:
- First mbed-arduino working program!; mbed is able to receive data from arduino nodes 0 or 1 depending on address set
Changed in this revision
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/RF24Network/RF24Network.cpp Mon Jul 06 03:17:33 2015 +0000 @@ -0,0 +1,439 @@ +/* + Copyright (C) 2011 James Coliz, Jr. <maniacbug@ymail.com> + + This program is free software; you can redistribute it and/or + modify it under the terms of the GNU General Public License + version 2 as published by the Free Software Foundation. + */ + +#include "RF24Network_config.h" +#include <nRF24L01P_Maniacbug.h> +#include "RF24Network.h" + +uint16_t RF24NetworkHeader::next_id = 1; + +uint64_t pipe_address( uint16_t node, uint8_t pipe ); +bool is_valid_address( uint16_t node ); + +/******************************************************************/ + +RF24Network::RF24Network( RF24& _radio ): radio(_radio), next_frame(frame_queue) +{ +} + +/******************************************************************/ + +void RF24Network::begin(uint8_t _channel, uint16_t _node_address ) +{ + if (! is_valid_address(_node_address) ) + return; + + node_address = _node_address; + + // Set up the radio the way we want it to look + radio.setChannel(_channel); + radio.setDataRate(RF24_1MBPS); + radio.setCRCLength(RF24_CRC_16); + + radio.setAutoAck(1); /*****/ + + // Setup our address helper cache + setup_address(); + + // Open up all listening pipes + int i = 6; + while (i--) + radio.openReadingPipe(i,pipe_address(_node_address,i)); + radio.startListening(); + + // Spew debugging state about the radio + radio.printDetails(); +} + +/******************************************************************/ + +void RF24Network::update(void) +{ + // if there is data ready + uint8_t pipe_num; + while ( radio.available(&pipe_num) ) + { + // Dump the payloads until we've gotten everything + bool done = false; + while (!done) + { + // Fetch the payload, and see if this was the last one. + done = radio.read( frame_buffer, sizeof(frame_buffer) ); + + // Read the beginning of the frame as the header + const RF24NetworkHeader& header = * reinterpret_cast<RF24NetworkHeader*>(frame_buffer); + + //IF_SERIAL_DEBUG(printf_P(PSTR("%lu: MAC Received on %u %s\n\r"),millis(),pipe_num,header.toString())); + //IF_SERIAL_DEBUG(const uint16_t* i = reinterpret_cast<const uint16_t*>(frame_buffer + sizeof(RF24NetworkHeader));printf_P(PSTR("%lu: NET message %04x\n\r"),millis(),*i)); + + // Throw it away if it's not a valid address + if ( !is_valid_address(header.to_node) ) + continue; + + // Is this for us? + if ( header.to_node == node_address ) + // Add it to the buffer of frames for us + enqueue(); + else + // Relay it + write(header.to_node); + + // NOT NEEDED anymore. Now all reading pipes are open to start. +#if 0 + // If this was for us, from one of our children, but on our listening + // pipe, it could mean that we are not listening to them. If so, open up + // and listen to their talking pipe + + if ( header.to_node == node_address && pipe_num == 0 && is_descendant(header.from_node) ) + { + uint8_t pipe = pipe_to_descendant(header.from_node); + radio.openReadingPipe(pipe,pipe_address(node_address,pipe)); + + // Also need to open pipe 1 so the system can get the full 5-byte address of the pipe. + radio.openReadingPipe(1,pipe_address(node_address,1)); + } +#endif + } + } +} + +/******************************************************************/ + +bool RF24Network::enqueue(void) +{ + bool result = false; + + //IF_SERIAL_DEBUG(printf_P(PSTR("%lu: NET Enqueue @%x "),millis(),next_frame-frame_queue)); + + // Copy the current frame into the frame queue + if ( next_frame < frame_queue + sizeof(frame_queue) ) + { + memcpy(next_frame,frame_buffer, frame_size ); + next_frame += frame_size; + + result = true; + //IF_SERIAL_DEBUG(printf_P(PSTR("ok\n\r"))); + } + else + { + //IF_SERIAL_DEBUG(printf_P(PSTR("failed\n\r"))); + } + + return result; +} + +/******************************************************************/ + +bool RF24Network::available(void) +{ + // Are there frames on the queue for us? + return (next_frame > frame_queue); +} + +/******************************************************************/ + +void RF24Network::peek(RF24NetworkHeader& header) +{ + if ( available() ) + { + // Copy the next available frame from the queue into the provided buffer + memcpy(&header,next_frame-frame_size,sizeof(RF24NetworkHeader)); + } +} + +/******************************************************************/ + +size_t RF24Network::read(RF24NetworkHeader& header,void* message, size_t maxlen) +{ + size_t bufsize = 0; + + if ( available() ) + { + // Move the pointer back one in the queue + next_frame -= frame_size; + uint8_t* frame = next_frame; + + // How much buffer size should we actually copy? + bufsize = min(maxlen,frame_size-sizeof(RF24NetworkHeader)); + + // Copy the next available frame from the queue into the provided buffer + memcpy(&header,frame,sizeof(RF24NetworkHeader)); + memcpy(message,frame+sizeof(RF24NetworkHeader),bufsize); + + //IF_SERIAL_DEBUG(printf_P(PSTR("%lu: NET Received %s\n\r"),millis(),header.toString())); + } + + return bufsize; +} + +/******************************************************************/ + +bool RF24Network::write(RF24NetworkHeader& header,const void* message, size_t len) +{ + // Fill out the header + header.from_node = node_address; + + // Build the full frame to send + memcpy(frame_buffer,&header,sizeof(RF24NetworkHeader)); + if (len) + memcpy(frame_buffer + sizeof(RF24NetworkHeader),message,min(frame_size-sizeof(RF24NetworkHeader),len)); + + //IF_SERIAL_DEBUG(printf_P(PSTR("%lu: NET Sending %s\n\r"),millis(),header.toString())); + if (len) + { + //IF_SERIAL_DEBUG(const uint16_t* i = reinterpret_cast<const uint16_t*>(message);printf_P(PSTR("%lu: NET message %04x\n\r"),millis(),*i)); + } + + // If the user is trying to send it to himself + if ( header.to_node == node_address ) + // Just queue it in the received queue + return enqueue(); + else + // Otherwise send it out over the air + return write(header.to_node); +} + +/******************************************************************/ + +bool RF24Network::write(uint16_t to_node) +{ + bool ok = false; + + // Throw it away if it's not a valid address + if ( !is_valid_address(to_node) ) + return false; + + // First, stop listening so we can talk. + //radio.stopListening(); + + // Where do we send this? By default, to our parent + uint16_t send_node = parent_node; + // On which pipe + uint8_t send_pipe = parent_pipe; + + // If the node is a direct child, + if ( is_direct_child(to_node) ) + { + // Send directly + send_node = to_node; + + // To its listening pipe + send_pipe = 0; + } + // If the node is a child of a child + // talk on our child's listening pipe, + // and let the direct child relay it. + else if ( is_descendant(to_node) ) + { + send_node = direct_child_route_to(to_node); + send_pipe = 0; + } + + //IF_SERIAL_DEBUG(printf_P(PSTR("%lu: MAC Sending to 0%o via 0%o on pipe %x\n\r"),millis(),to_node,send_node,send_pipe)); + + // First, stop listening so we can talk + radio.stopListening(); + + // Put the frame on the pipe + ok = write_to_pipe( send_node, send_pipe ); + + // NOT NEEDED anymore. Now all reading pipes are open to start. +#if 0 + // If we are talking on our talking pipe, it's possible that no one is listening. + // If this fails, try sending it on our parent's listening pipe. That will wake + // it up, and next time it will listen to us. + + if ( !ok && send_node == parent_node ) + ok = write_to_pipe( parent_node, 0 ); +#endif + + // Now, continue listening + radio.startListening(); + + return ok; +} + +/******************************************************************/ + +bool RF24Network::write_to_pipe( uint16_t node, uint8_t pipe ) +{ + bool ok = false; + + uint64_t out_pipe = pipe_address( node, pipe ); + + // Open the correct pipe for writing. + radio.openWritingPipe(out_pipe); + + // Retry a few times + short attempts = 5; + do + { + ok = radio.write( frame_buffer, frame_size ); + } + while ( !ok && --attempts ); + + //IF_SERIAL_DEBUG(printf_P(PSTR("%lu: MAC Sent on %lx %S\n\r"),millis(),(uint32_t)out_pipe,ok?PSTR("ok"):PSTR("failed"))); + + return ok; +} + +/******************************************************************/ + +const char* RF24NetworkHeader::toString(void) const +{ + static char buffer[45]; + //snprintf_P(buffer,sizeof(buffer),("id %04x from 0%o to 0%o type %c"),id,from_node,to_node,type); + return buffer; +} + +/******************************************************************/ + +bool RF24Network::is_direct_child( uint16_t node ) +{ + bool result = false; + + // A direct child of ours has the same low numbers as us, and only + // one higher number. + // + // e.g. node 0234 is a direct child of 034, and node 01234 is a + // descendant but not a direct child + + // First, is it even a descendant? + if ( is_descendant(node) ) + { + // Does it only have ONE more level than us? + uint16_t child_node_mask = ( ~ node_mask ) << 3; + result = ( node & child_node_mask ) == 0 ; + } + + return result; +} + +/******************************************************************/ + +bool RF24Network::is_descendant( uint16_t node ) +{ + return ( node & node_mask ) == node_address; +} + +/******************************************************************/ + +void RF24Network::setup_address(void) +{ + // First, establish the node_mask + uint16_t node_mask_check = 0xFFFF; + while ( node_address & node_mask_check ) + node_mask_check <<= 3; + + node_mask = ~ node_mask_check; + + // parent mask is the next level down + uint16_t parent_mask = node_mask >> 3; + + // parent node is the part IN the mask + parent_node = node_address & parent_mask; + + // parent pipe is the part OUT of the mask + uint16_t i = node_address; + uint16_t m = parent_mask; + while (m) + { + i >>= 3; + m >>= 3; + } + parent_pipe = i; + +#ifdef SERIAL_DEBUG + printf_P(PSTR("setup_address node=0%o mask=0%o parent=0%o pipe=0%o\n\r"),node_address,node_mask,parent_node,parent_pipe); +#endif +} + +/******************************************************************/ + +uint16_t RF24Network::direct_child_route_to( uint16_t node ) +{ + // Presumes that this is in fact a child!! + + uint16_t child_mask = ( node_mask << 3 ) | 7; + return node & child_mask ; +} + +/******************************************************************/ + +uint8_t RF24Network::pipe_to_descendant( uint16_t node ) +{ + uint16_t i = node; + uint16_t m = node_mask; + + while (m) + { + i >>= 3; + m >>= 3; + } + + return i & 7; +} + +/******************************************************************/ + +bool is_valid_address( uint16_t node ) +{ + bool result = true; + + while(node) + { + uint8_t digit = node & 7; + if (digit < 1 || digit > 5) + { + result = false; + //printf_P(("*** WARNING *** Invalid address 0%o\n\r"),node); + break; + } + node >>= 3; + } + + return result; +} + +/******************************************************************/ + +uint64_t pipe_address( uint16_t node, uint8_t pipe ) +{ + static uint8_t pipe_segment[] = { 0x3c, 0x5a, 0x69, 0x96, 0xa5, 0xc3 }; + + uint64_t result; + uint8_t* out = reinterpret_cast<uint8_t*>(&result); + + out[0] = pipe_segment[pipe]; + + uint8_t w; + short i = 4; + short shift = 12; + while(i--) + { + w = ( node >> shift ) & 0xF ; + w |= ~w << 4; + out[i+1] = w; + + shift -= 4; + } + + //IF_SERIAL_DEBUG(uint32_t* top = reinterpret_cast<uint32_t*>(out+1);printf_P(PSTR("%lu: NET Pipe %i on node 0%o has address %lx%x\n\r"),millis(),pipe,node,*top,*out)); + + return result; +} + +// vim:ai:cin:sts=2 sw=2 ft=cpp + +uint8_t RF24Network::min(uint8_t a, uint8_t b) +{ + if(a < b) + return a; + else + return b; +} \ No newline at end of file
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/RF24Network/RF24Network.h Mon Jul 06 03:17:33 2015 +0000 @@ -0,0 +1,344 @@ +/* + Copyright (C) 2011 James Coliz, Jr. <maniacbug@ymail.com> + + This program is free software; you can redistribute it and/or + modify it under the terms of the GNU General Public License + version 2 as published by the Free Software Foundation. + */ + +#ifndef __RF24NETWORK_H__ +#define __RF24NETWORK_H__ + +/** + * @file RF24Network.h + * + * Class declaration for RF24Network + */ + +#include <stddef.h> +#include <stdint.h> + +class RF24; + +/** + * Header which is sent with each message + * + * The frame put over the air consists of this header and a message + */ +struct RF24NetworkHeader +{ + uint16_t from_node; /**< Logical address where the message was generated */ + uint16_t to_node; /**< Logical address where the message is going */ + uint16_t id; /**< Sequential message ID, incremented every message */ + unsigned char type; /**< Type of the packet. 0-127 are user-defined types, 128-255 are reserved for system */ + unsigned char reserved; /**< Reserved for future use */ + + static uint16_t next_id; /**< The message ID of the next message to be sent */ + + /** + * Default constructor + * + * Simply constructs a blank header + */ + RF24NetworkHeader() {} + + /** + * Send constructor + * + * Use this constructor to create a header and then send a message + * + * @code + * RF24NetworkHeader header(recipient_address,'t'); + * network.write(header,&message,sizeof(message)); + * @endcode + * + * @param _to The logical node address where the message is going + * @param _type The type of message which follows. Only 0-127 are allowed for + * user messages. + */ + RF24NetworkHeader(uint16_t _to, unsigned char _type = 0): to_node(_to), id(next_id++), type(_type&0x7f) {} + + /** + * Create debugging string + * + * Useful for debugging. Dumps all members into a single string, using + * internal static memory. This memory will get overridden next time + * you call the method. + * + * @return String representation of this object + */ + const char* toString(void) const; +}; + +/** + * Network Layer for RF24 Radios + * + * This class implements an OSI Network Layer using nRF24L01(+) radios driven + * by RF24 library. + */ + +class RF24Network +{ +public: + /** + * Construct the network + * + * @param _radio The underlying radio driver instance + * + */ + RF24Network( RF24& _radio ); + + /** + * Bring up the network + * + * @warning Be sure to 'begin' the radio first. + * + * @param _channel The RF channel to operate on + * @param _node_address The logical address of this node + */ + void begin(uint8_t _channel, uint16_t _node_address ); + + /** + * Main layer loop + * + * This function must be called regularly to keep the layer going. This is where all + * the action happens! + */ + void update(void); + + /** + * Test whether there is a message available for this node + * + * @return Whether there is a message available for this node + */ + bool available(void); + + /** + * Read the next available header + * + * Reads the next available header without advancing to the next + * incoming message. Useful for doing a switch on the message type + * + * If there is no message available, the header is not touched + * + * @param[out] header The header (envelope) of the next message + */ + void peek(RF24NetworkHeader& header); + + /** + * Read a message + * + * @param[out] header The header (envelope) of this message + * @param[out] message Pointer to memory where the message should be placed + * @param maxlen The largest message size which can be held in @p message + * @return The total number of bytes copied into @p message + */ + size_t read(RF24NetworkHeader& header, void* message, size_t maxlen); + + /** + * Send a message + * + * @param[in,out] header The header (envelope) of this message. The critical + * thing to fill in is the @p to_node field so we know where to send the + * message. It is then updated with the details of the actual header sent. + * @param message Pointer to memory where the message is located + * @param len The size of the message + * @return Whether the message was successfully received + */ + bool write(RF24NetworkHeader& header,const void* message, size_t len); + +protected: + void open_pipes(void); + uint16_t find_node( uint16_t current_node, uint16_t target_node ); + bool write(uint16_t); + bool write_to_pipe( uint16_t node, uint8_t pipe ); + bool enqueue(void); + + bool is_direct_child( uint16_t node ); + bool is_descendant( uint16_t node ); + uint16_t direct_child_route_to( uint16_t node ); + uint8_t pipe_to_descendant( uint16_t node ); + void setup_address(void); + +private: + RF24& radio; /**< Underlying radio driver, provides link/physical layers */ + uint16_t node_address; /**< Logical node address of this unit, 1 .. UINT_MAX */ + const static int frame_size = 32; /**< How large is each frame over the air */ + uint8_t frame_buffer[frame_size]; /**< Space to put the frame that will be sent/received over the air */ + uint8_t frame_queue[5*frame_size]; /**< Space for a small set of frames that need to be delivered to the app layer */ + uint8_t* next_frame; /**< Pointer into the @p frame_queue where we should place the next received frame */ + + uint16_t parent_node; /**< Our parent's node address */ + uint8_t parent_pipe; /**< The pipe our parent uses to listen to us */ + uint16_t node_mask; /**< The bits which contain signfificant node address information */ + uint8_t min(uint8_t, uint8_t); +}; + +/** + * @example helloworld_tx.pde + * + * Simplest possible example of using RF24Network. Put this sketch + * on one node, and helloworld_rx.pde on the other. Tx will send + * Rx a nice message every 2 seconds which rx will print out for us. + */ + +/** + * @example helloworld_rx.pde + * + * Simplest possible example of using RF24Network. Put this sketch + * on one node, and helloworld_tx.pde on the other. Tx will send + * Rx a nice message every 2 seconds which rx will print out for us. + */ + +/** + * @example meshping.pde + * + * Example of pinging across a mesh network + * Using this sketch, each node will send a ping to the base every + * few seconds. The RF24Network library will route the message across + * the mesh to the correct node. + */ + +/** + * @example sensornet.pde + * + * Example of a sensor network. + * This sketch demonstrates how to use the RF24Network library to + * manage a set of low-power sensor nodes which mostly sleep but + * awake regularly to send readings to the base. + */ +/** + * @mainpage Network Layer for RF24 Radios + * + * This class implements an <a href="http://en.wikipedia.org/wiki/Network_layer">OSI Network Layer</a> using nRF24L01(+) radios driven + * by the <a href="http://maniacbug.github.com/RF24/">RF24</a> library. + * + * @section Purpose Purpose/Goal + * + * Create an alternative to ZigBee radios for Arduino communication. + * + * Xbees are excellent little radios, backed up by a mature and robust standard + * protocol stack. They are also expensive. + * + * For many Arduino uses, they seem like overkill. So I am working to build + * an alternative using nRF24L01 radios. Modules are available for less than + * $6 from many sources. With the RF24Network layer, I hope to cover many + * common communication scenarios. + * + * Please see the @ref Zigbee page for a comparison against the ZigBee protocols + * + * @section Features Features + * + * The layer provides: + * @li Host Addressing. Each node has a logical address on the local network. + * @li Message Forwarding. Messages can be sent from one node to any other, and + * this layer will get them there no matter how many hops it takes. + * @li Ad-hoc Joining. A node can join a network without any changes to any + * existing nodes. + * + * The layer does not (yet) provide: + * @li Fragmentation/reassembly. Ability to send longer messages and put them + * all back together before exposing them up to the app. + * @li Power-efficient listening. It would be useful for nodes who are listening + * to sleep for extended periods of time if they could know that they would miss + * no traffic. + * @li Dynamic address assignment. + * + * @section More How to learn more + * + * @li <a href="http://maniacbug.github.com/RF24/">RF24: Underlying radio driver</a> + * @li <a href="classRF24Network.html">RF24Network Class Documentation</a> + * @li <a href="https://github.com/maniacbug/RF24Network/">Source Code</a> + * @li <a href="https://github.com/maniacbug/RF24Network/archives/master">Downloads Page</a> + * @li <a href="examples.html">Examples Page</a>. Start with <a href="helloworld_rx_8pde-example.html">helloworld_rx</a> and <a href="helloworld_tx_8pde-example.html">helloworld_tx</a>. + * + * @section Topology Topology for Mesh Networks using nRF24L01(+) + * + * This network layer takes advantage of the fundamental capability of the nRF24L01(+) radio to + * listen actively to up to 6 other radios at once. The network is arranged in a + * <a href="http://en.wikipedia.org/wiki/Network_Topology#Tree">Tree Topology</a>, where + * one node is the base, and all other nodes are children either of that node, or of another. + * Unlike a true mesh network, multiple nodes are not connected together, so there is only one + * path to any given node. + * + * @section Octal Octal Addressing + * + * Each node must be assigned an 15-bit address by the administrator. This address exactly + * describes the position of the node within the tree. The address is an octal number. Each + * digit in the address represents a position in the tree further from the base. + * + * @li Node 00 is the base node. + * @li Nodes 01-05 are nodes whose parent is the base. + * @li Node 021 is the second child of node 01. + * @li Node 0321 is the third child of node 021, an so on. + * @li The largest node address is 05555, so 3,125 nodes are allowed on a single channel. + * + * @section Routing How routing is handled + * + * When sending a message using RF24Network::write(), you fill in the header with the logical + * node address. The network layer figures out the right path to find that node, and sends + * it through the system until it gets to the right place. This works even if the two nodes + * are far separated, as it will send the message down to the base node, and then back out + * to the final destination. + * + * All of this work is handled by the RF24Network::update() method, so be sure to call it + * regularly or your network will miss packets. + * + * @section Startup Starting up a node + * + * When a node starts up, it only has to contact its parent to establish communication. + * No direct connection to the Base node is needed. This is useful in situations where + * relay nodes are being used to bridge the distance to the base, so leaf nodes are out + * of range of the base. + * + * @section Directionality Directionality + * + * By default all nodes are always listening, so messages will quickly reach + * their destination. + * + * You may choose to sleep any nodes which do not have any active children on the network + * (i.e. leaf nodes). This is useful in a case where + * the leaf nodes are operating on batteries and need to sleep. + * This is useful for a sensor network. The leaf nodes can sleep most of the time, and wake + * every few minutes to send in a reading. However, messages cannot be sent to these + * sleeping nodes. + * + * In the future, I plan to write a system where messages can still be passed upward from + * the base, and get delivered when a sleeping node is ready to receive them. The radio + * and underlying driver support 'ack payloads', which will be a handy mechanism for this. + * + * @page Zigbee Comparison to ZigBee + * + * This network layer is influenced by the design of ZigBee, but does not implement it + * directly. + * + * @section Advantage Which is better? + * + * ZigBee is a much more robust, feature-rich set of protocols, with many different vendors + * providing compatible chips. + * + * RF24Network is cheap. While ZigBee radios are well over $20, nRF24L01 modules can be found + * for under $6. My personal favorite is + * <a href="http://www.mdfly.com/index.php?main_page=product_info&products_id=82">MDFly RF-IS2401</a>. + * + * @section Contrast Similiarities & Differences + * + * Here are some comparisons between RF24Network and ZigBee. + * + * @li Both networks support Star and Tree topologies. Only Zigbee supports a true mesh. + * @li In both networks, only leaf nodes can sleep (see @ref NodeNames). + * @li ZigBee nodes are configured using AT commands, or a separate Windows application. + * RF24 nodes are configured by recompiliing the firmware or writing to EEPROM. + * + * @section NodeNames Node Naming + * + * @li Leaf node: A node at the outer edge of the network with no children. ZigBee calls it + * an End Device node. + * @li Relay node: A node which has both parents and children, and relays messages from one + * to the other. ZigBee calls it a Router. + * @li Base node. The top of the tree node with no parents, only children. Typically this node + * will bridge to another kind of network like Ethernet. ZigBee calls it a Co-ordinator node. + */ + +#endif // __RF24NETWORK_H__ +// vim:ai:cin:sts=2 sw=2 ft=cpp
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/RF24Network/RF24Network_config.h Mon Jul 06 03:17:33 2015 +0000 @@ -0,0 +1,23 @@ + +/* + Copyright (C) 2011 James Coliz, Jr. <maniacbug@ymail.com> + + This program is free software; you can redistribute it and/or + modify it under the terms of the GNU General Public License + version 2 as published by the Free Software Foundation. + */ + +#ifndef __RF24_CONFIG_H__ +#define __RF24_CONFIG_H__ + +#include "mbed.h" + +#include <stddef.h> +#include <stdint.h> +#include <stdio.h> +#include <string.h> +#define _BV(x) (1<<(x)) + + +#endif // __RF24_CONFIG_H__ +// vim:ai:cin:sts=2 sw=2 ft=cpp
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/RF24Network/Sync.cpp Mon Jul 06 03:17:33 2015 +0000 @@ -0,0 +1,93 @@ +/* + Copyright (C) 2011 J. Coliz <maniacbug@ymail.com> + + This program is free software; you can redistribute it and/or + modify it under the terms of the GNU General Public License + version 2 as published by the Free Software Foundation. + */ + +// STL headers +// C headers +#include <stdlib.h> +// Framework headers +// Library headers +#include <RF24Network.h> +// Project headers +// This component's header +#include <Sync.h> + +/****************************************************************************/ + +void Sync::update(void) +{ + // Pump the network + network.update(); + + // Look for changes to the data + uint8_t message[32]; + uint8_t *mptr = message; + unsigned at = 0; + while ( at < len ) + { + if ( app_data && internal_data && app_data[at] != internal_data[at] ) + { + // Compose a message with the deltas + *mptr++ = at + 1; + *mptr++ = app_data[at]; + + // Update our internal view + internal_data[at] = app_data[at]; + } + ++at; + } + // Zero out the remainder + while ( at++ < sizeof(message) ) + *mptr++ = 0; + + // If changes, send a message + if ( *message ) + { + // TODO handle the case where this has to be broken into + // multiple messages + RF24NetworkHeader header(/*to node*/ to_node, /*type*/ 'S' /*Sync*/); + network.write(header,message,sizeof(message)); + } + + // Look for messages from the network + // Is there anything ready for us? + if ( network.available() ) + { + // If so, take a look at it + RF24NetworkHeader header; + network.peek(header); + + switch (header.type) + { + case 'S': + //IF_SERIAL_DEBUG(printf_P(PSTR("%lu: SYN Received sync message\n\r"),millis())); + + network.read(header,&message,sizeof(message)); + // Parse the message and update the vars + mptr = message; + at = 0; + while ( mptr < message + sizeof(message) ) + { + // A '0' in the first position means we are done + if ( !*mptr ) + break; + uint8_t pos = (*mptr++) - 1; + uint8_t val = *mptr++; + + //IF_SERIAL_DEBUG(printf_P(PSTR("%lu: SYN Updated position %u to value %u\n\r"),millis(),pos,val)); + + app_data[pos] = val; + internal_data[pos] = val; + } + break; + default: + // Leave other messages for the app + break; + }; + } +} +// vim:cin:ai:sts=2 sw=2 ft=cpp
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/RF24Network/Sync.h Mon Jul 06 03:17:33 2015 +0000 @@ -0,0 +1,85 @@ +/* + Copyright (C) 2011 J. Coliz <maniacbug@ymail.com> + + This program is free software; you can redistribute it and/or + modify it under the terms of the GNU General Public License + version 2 as published by the Free Software Foundation. + */ + +#ifndef __SYNC_H__ +#define __SYNC_H__ + +// STL headers +// C headers +#include <stdlib.h> +#include <string.h> +// Framework headers +// Library headers +#include <RF24Network_config.h> +// Project headers + +class RF24Network; + +/** + * Synchronizes a shared set of variables between multiple nodes + */ + +class Sync +{ +private: + RF24Network& network; + uint8_t* app_data; /**< Application's copy of the data */ + uint8_t* internal_data; /**< Our copy of the data */ + size_t len; /**< Length of the data in bytes */ + uint16_t to_node; /**< The other node we're syncing with */ + +protected: +public: + /** + * Constructor + * + * @param _network Which network to syncrhonize over + */ + Sync(RF24Network& _network): network(_network), app_data(NULL), + internal_data(NULL), len(0), to_node(0) + { + } + /** + * Begin the object + * + * @param _to_node Which node we are syncing with + */ + void begin(uint16_t _to_node) + { + to_node = _to_node; + } + /** + * Declare the shared data set + * + * @param _data Location of shared data to be syncrhonized + */ + template <class T> + void register_me(T& _data) + { + app_data = reinterpret_cast<uint8_t*>(&_data); + len = sizeof(_data); + internal_data = reinterpret_cast<uint8_t*>(malloc(len)); + reset(); + } + + /** + * Reset the internal copy of the shared data set + */ + void reset(void) + { + memcpy(internal_data,app_data,len); + } + + /** + * Update the network and the shared data set + */ + void update(void); +}; + +#endif // __SYNC_H__ +// vim:cin:ai:sts=2 sw=2 ft=cpp
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/main.cpp Mon Jul 06 03:17:33 2015 +0000 @@ -0,0 +1,73 @@ +#include "mbed.h" +#include <RF24Network.h> +#include <nRF24L01P_Maniacbug.h> + +Serial pc(USBTX, USBRX); + +#define nrf_CE D9 +#define nrf_CSN D10 +#define nrf_IRQ PB_0 +#define spi_SCK D3 +#define spi_MOSI D4 +#define spi_MISO D5 + +//RF24 radio(D11, D12, D13, D10, D9); +RF24 radio(spi_MOSI, spi_MISO, spi_SCK, nrf_CSN, nrf_CE); + +// Network uses that radio +RF24Network network(radio); + +// Address of our node +const uint16_t this_node = 0; + +// Address of the other node +const uint16_t other_node = 1; + +// How often to send 'hello world to the other unit +const unsigned long interval = 100; //ms + +// When did we last send? +unsigned long last_sent; + +// How many have we sent already +unsigned long packets_sent; + +// Structure of our payload +struct payload_t +{ + unsigned long ms; + unsigned long counter; + + float vector_4d[4]; +}; + + +int main() +{ + pc.baud(921600); + wait_ms(1000); + + + + pc.printf("mBed RF24 network node - Rx only\n"); + radio.begin(); + network.begin(/*channel*/ 90, /*node address*/ this_node); + wait_ms(2000); + + while(1) + { + // Pump the network regularly + network.update(); + + // Is there anything ready for us? + while ( network.available() ) + { + // If so, grab it and print it out + RF24NetworkHeader header_rx; + payload_t payload_rx; + network.read(header_rx,&payload_rx,sizeof(payload_rx)); + pc.printf("Received packet # %d at %d ms, message: V4 %f, %f, %f, %f \n",payload_rx.counter,payload_rx.ms, payload_rx.vector_4d[0],payload_rx.vector_4d[1],payload_rx.vector_4d[2],payload_rx.vector_4d[3]); + } + } + +} \ No newline at end of file
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/mbed-rtos.lib Mon Jul 06 03:17:33 2015 +0000 @@ -0,0 +1,1 @@ +http://mbed.org/users/mbed_official/code/mbed-rtos/#58c3b7759abf
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/mbed.bld Mon Jul 06 03:17:33 2015 +0000 @@ -0,0 +1,1 @@ +http://mbed.org/users/mbed_official/code/mbed/builds/7cff1c4259d7 \ No newline at end of file
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/nRF24L01P_Maniacbug/nRF24L01P_Maniacbug.cpp Mon Jul 06 03:17:33 2015 +0000 @@ -0,0 +1,1003 @@ +/* + Copyright (C) 2011 J. Coliz <maniacbug@ymail.com> + + This program is free software; you can redistribute it and/or + modify it under the terms of the GNU General Public License + version 2 as published by the Free Software Foundation. + */ + +#include "nRF24L01P_Maniacbug.h" + +/****************************************************************************/ + +void RF24::csn(int mode) +{ + // Minimum ideal spi bus speed is 2x data rate + // If we assume 2Mbs data rate and 16Mhz clock, a + // divider of 4 is the minimum we want. + // CLK:BUS 8Mhz:2Mhz, 16Mhz:4Mhz, or 20Mhz:5Mhz +//#ifdef ARDUINO +// spi.setBitOrder(MSBFIRST); +// spi.setDataMode(spi_MODE0); +// spi.setClockDivider(spi_CLOCK_DIV4); +//#endif +// digitalWrite(csn_pin,mode); + csn_pin = mode; + +} + +/****************************************************************************/ + +void RF24::ce(int level) +{ + //digitalWrite(ce_pin,level); + ce_pin = level; +} + +/****************************************************************************/ + +uint8_t RF24::read_register(uint8_t reg, uint8_t* buf, uint8_t len) +{ + uint8_t status; + + csn(LOW); + status = spi.write( R_REGISTER | ( REGISTER_MASK & reg ) ); + while ( len-- ) + *buf++ = spi.write(0xff); + + csn(HIGH); + + return status; +} + +/****************************************************************************/ + +uint8_t RF24::read_register(uint8_t reg) +{ + csn(LOW); + spi.write( R_REGISTER | ( REGISTER_MASK & reg ) ); + uint8_t result = spi.write(0xff); + + csn(HIGH); + return result; +} + +/****************************************************************************/ + +uint8_t RF24::write_register(uint8_t reg, const uint8_t* buf, uint8_t len) +{ + uint8_t status; + + csn(LOW); + status = spi.write( W_REGISTER | ( REGISTER_MASK & reg ) ); + while ( len-- ) + spi.write(*buf++); + + csn(HIGH); + + return status; +} + +/****************************************************************************/ + +uint8_t RF24::write_register(uint8_t reg, uint8_t value) +{ + uint8_t status; + +// IF_SERIAL_DEBUG(printf(("write_register(%02x,%02x)\r\n"),reg,value)); + + csn(LOW); + status = spi.write( W_REGISTER | ( REGISTER_MASK & reg ) ); + spi.write(value); + csn(HIGH); + + return status; +} + +/****************************************************************************/ + +uint8_t RF24::write_payload(const void* buf, uint8_t len) +{ + uint8_t status; + + const uint8_t* current = reinterpret_cast<const uint8_t*>(buf); + + uint8_t data_len = min(len,payload_size); + uint8_t blank_len = dynamic_payloads_enabled ? 0 : payload_size - data_len; + + //printf("[Writing %u bytes %u blanks]",data_len,blank_len); + + csn(LOW); + status = spi.write( W_TX_PAYLOAD ); + while ( data_len-- ) + spi.write(*current++); + while ( blank_len-- ) + spi.write(0); + csn(HIGH); + + return status; +} + +/****************************************************************************/ + +uint8_t RF24::read_payload(void* buf, uint8_t len) +{ + uint8_t status; + uint8_t* current = reinterpret_cast<uint8_t*>(buf); + + uint8_t data_len = min(len,payload_size); + uint8_t blank_len = dynamic_payloads_enabled ? 0 : payload_size - data_len; + + //printf("[Reading %u bytes %u blanks]",data_len,blank_len); + + csn(LOW); + status = spi.write( R_RX_PAYLOAD ); + while ( data_len-- ) + *current++ = spi.write(0xff); + while ( blank_len-- ) + spi.write(0xff); + csn(HIGH); + + return status; +} + +/****************************************************************************/ + +uint8_t RF24::flush_rx(void) +{ + uint8_t status; + + csn(LOW); + status = spi.write( FLUSH_RX ); + csn(HIGH); + + return status; +} + +/****************************************************************************/ + +uint8_t RF24::flush_tx(void) +{ + uint8_t status; + + csn(LOW); + status = spi.write( FLUSH_TX ); + csn(HIGH); + + return status; +} + +/****************************************************************************/ + +uint8_t RF24::get_status(void) +{ + uint8_t status; + + csn(LOW); + status = spi.write( NOP ); + csn(HIGH); + + return status; +} + +/****************************************************************************/ + +void RF24::print_status(uint8_t status) +{ + printf(("STATUS\t\t = 0x%02x RX_DR=%x TX_DS=%x MAX_RT=%x RX_P_NO=%x TX_FULL=%x\r\n"), + status, + (status & _BV(RX_DR))?1:0, + (status & _BV(TX_DS))?1:0, + (status & _BV(MAX_RT))?1:0, + ((status >> RX_P_NO) & 7), + (status & _BV(TX_FULL))?1:0 + ); +} + +/****************************************************************************/ + +void RF24::print_observe_tx(uint8_t value) +{ + printf(("OBSERVE_TX=%02x: POLS_CNT=%x ARC_CNT=%x\r\n"), + value, + (value >> PLOS_CNT) & 15, + (value >> ARC_CNT) & 15 + ); +} + +/****************************************************************************/ + +void RF24::print_byte_register(const char* name, uint8_t reg, uint8_t qty) +{ +// char extra_tab = strlen(name) < 8 ? '\t' : 0; + printf("%s =",name); + while (qty--) + printf((" 0x%02x"),read_register(reg++)); + printf(("\r\n")); +} + +/****************************************************************************/ + +void RF24::print_address_register(const char* name, uint8_t reg, uint8_t qty) +{ +// char extra_tab = strlen_P(name) < 8 ? '\t' : 0; + printf("%s =",name); + + while (qty--) + { + uint8_t buffer[5]; + read_register(reg++,buffer,sizeof buffer); + + printf((" 0x")); + uint8_t* bufptr = buffer + sizeof buffer; + while( --bufptr >= buffer ) + printf(("%02x"),*bufptr); + } + + printf(("\r\n")); +} + +/****************************************************************************/ + +RF24::RF24(PinName mosi, PinName miso, PinName sck, PinName _csnpin, PinName _cepin): + ce_pin(_cepin), csn_pin(_csnpin), wide_band(true), p_variant(false), + payload_size(32), ack_payload_available(false), dynamic_payloads_enabled(false), + pipe0_reading_address(0), spi(mosi, miso, sck) +{ + spi.frequency(10000000/5); // 2Mbit, 1/5th the maximum transfer rate for the spi bus + spi.format(8,0); // 8-bit, ClockPhase = 0, ClockPolarity = 0 + wait_ms(100); +} + +/****************************************************************************/ + +void RF24::setChannel(uint8_t channel) +{ + // TODO: This method could take advantage of the 'wide_band' calculation + // done in setChannel() to require certain channel spacing. + + const uint8_t max_channel = 127; + write_register(RF_CH,min(channel,max_channel)); +} + +/****************************************************************************/ + +void RF24::setPayloadSize(uint8_t size) +{ + const uint8_t max_payload_size = 32; + payload_size = min(size,max_payload_size); +} + +/****************************************************************************/ + +uint8_t RF24::getPayloadSize(void) +{ + return payload_size; +} + +/****************************************************************************/ + +static const char rf24_datarate_e_str_0[] = "1MBPS"; +static const char rf24_datarate_e_str_1[] = "2MBPS"; +static const char rf24_datarate_e_str_2[] = "250KBPS"; +static const char * const rf24_datarate_e_str_P[] = { + rf24_datarate_e_str_0, + rf24_datarate_e_str_1, + rf24_datarate_e_str_2, +}; +static const char rf24_model_e_str_0[] = "nRF24L01"; +static const char rf24_model_e_str_1[] = "nRF24L01+"; +static const char * const rf24_model_e_str_P[] = { + rf24_model_e_str_0, + rf24_model_e_str_1, +}; +static const char rf24_crclength_e_str_0[] = "Disabled"; +static const char rf24_crclength_e_str_1[] = "8 bits"; +static const char rf24_crclength_e_str_2[] = "16 bits" ; +static const char * const rf24_crclength_e_str_P[] = { + rf24_crclength_e_str_0, + rf24_crclength_e_str_1, + rf24_crclength_e_str_2, +}; +static const char rf24_pa_dbm_e_str_0[] = "PA_MIN"; +static const char rf24_pa_dbm_e_str_1[] = "PA_LOW"; +static const char rf24_pa_dbm_e_str_2[] = "PA_MED"; +static const char rf24_pa_dbm_e_str_3[] = "PA_HIGH"; +static const char * const rf24_pa_dbm_e_str_P[] = { + rf24_pa_dbm_e_str_0, + rf24_pa_dbm_e_str_1, + rf24_pa_dbm_e_str_2, + rf24_pa_dbm_e_str_3, +}; + +void RF24::printDetails(void) +{ + print_status(get_status()); + + print_address_register(("RX_ADDR_P0-1"),RX_ADDR_P0,2); + print_byte_register(("RX_ADDR_P2-5"),RX_ADDR_P2,4); + print_address_register(("TX_ADDR"),TX_ADDR); + + print_byte_register(("RX_PW_P0-6"),RX_PW_P0,6); + print_byte_register(("EN_AA"),EN_AA); + print_byte_register(("EN_RXADDR"),EN_RXADDR); + print_byte_register(("RF_CH"),RF_CH); + print_byte_register(("RF_SETUP"),RF_SETUP); + print_byte_register(("CONFIG"),CONFIG); + print_byte_register(("DYNPD/FEATURE"),DYNPD,2); + + printf(("Data Rate\t = %s\r\n"), rf24_datarate_e_str_P[getDataRate()]); + printf(("Model\t\t = %s\r\n"), rf24_model_e_str_P[isPVariant()]); + printf(("CRC Length\t = %s\r\n"),rf24_crclength_e_str_P[getCRCLength()]); + printf(("PA Power\t = %s\r\n"),rf24_pa_dbm_e_str_P[getPALevel()]); +} + +/****************************************************************************/ + +void RF24::begin(void) +{ + // Initialize pins +// pinMode(ce_pin,OUTPUT); +// pinMode(csn_pin,OUTPUT); + + // Initialize spi bus + //spi.begin(); + mainTimer.start(); + + ce(LOW); + csn(HIGH); + + // Must allow the radio time to settle else configuration bits will not necessarily stick. + // This is actually only required following power up but some settling time also appears to + // be required after resets too. For full coverage, we'll always assume the worst. + // Enabling 16b CRC is by far the most obvious case if the wrong timing is used - or skipped. + // Technically we require 4.5ms + 14us as a worst case. We'll just call it 5ms for good measure. + // WARNING: wait_ms is based on P-variant whereby non-P *may* require different timing. + wait_ms( 5 ) ; + + // Set 1500uS (minimum for 32B payload in ESB@250KBPS) timeouts, to make testing a little easier + // WARNING: If this is ever lowered, either 250KBS mode with AA is broken or maximum packet + // sizes must never be used. See documentation for a more complete explanation. + write_register(SETUP_RETR,(4 << ARD) | (15 << ARC)); + + // Restore our default PA level + setPALevel( RF24_PA_MAX ) ; + + // Determine if this is a p or non-p RF24 module and then + // reset our data rate back to default value. This works + // because a non-P variant won't allow the data rate to + // be set to 250Kbps. + if( setDataRate( RF24_250KBPS ) ) + { + p_variant = true ; + } + + // Then set the data rate to the slowest (and most reliable) speed supported by all + // hardware. + setDataRate( RF24_1MBPS ) ; + + // Initialize CRC and request 2-byte (16bit) CRC + setCRCLength( RF24_CRC_16 ) ; + + // Disable dynamic payloads, to match dynamic_payloads_enabled setting + write_register(DYNPD,0); + + // Reset current status + // Notice reset and flush is the last thing we do + write_register(STATUS,_BV(RX_DR) | _BV(TX_DS) | _BV(MAX_RT) ); + + // Set up default configuration. Callers can always change it later. + // This channel should be universally safe and not bleed over into adjacent + // spectrum. + //setChannel(76); + setChannel(90); + + // Flush buffers + flush_rx(); + flush_tx(); + + // set EN_RXADDRR to 0 to fix pipe 0 from receiving + write_register(EN_RXADDR, 0); +} + +/****************************************************************************/ + +void RF24::startListening(void) +{ + write_register(CONFIG, read_register(CONFIG) | _BV(PWR_UP) | _BV(PRIM_RX)); + write_register(STATUS, _BV(RX_DR) | _BV(TX_DS) | _BV(MAX_RT) ); + + // Restore the pipe0 adddress, if exists + if (pipe0_reading_address) + write_register(RX_ADDR_P0, reinterpret_cast<const uint8_t*>(&pipe0_reading_address), 5); + + // Flush buffers + flush_rx(); + flush_tx(); + + // Go! + ce(HIGH); + + // wait for the radio to come up (130us actually only needed) +// wait_msMicroseconds(130); + wait_us(130); +} + +/****************************************************************************/ + +void RF24::stopListening(void) +{ + ce(LOW); + flush_tx(); + flush_rx(); +} + +/****************************************************************************/ + +void RF24::powerDown(void) +{ + write_register(CONFIG,read_register(CONFIG) & ~_BV(PWR_UP)); +} + +/****************************************************************************/ + +void RF24::powerUp(void) +{ + write_register(CONFIG,read_register(CONFIG) | _BV(PWR_UP)); +} + +/******************************************************************/ + +bool RF24::write( const void* buf, uint8_t len ) +{ + bool result = false; + + // Begin the write + startWrite(buf,len); + + // ------------ + // At this point we could return from a non-blocking write, and then call + // the rest after an interrupt + + // Instead, we are going to block here until we get TX_DS (transmission completed and ack'd) + // or MAX_RT (maximum retries, transmission failed). Also, we'll timeout in case the radio + // is flaky and we get neither. + + // IN the end, the send should be blocking. It comes back in 60ms worst case, or much faster + // if I tighted up the retry logic. (Default settings will be 1500us. + // Monitor the send + uint8_t observe_tx; + uint8_t status; + uint32_t sent_at = mainTimer.read_ms(); + const uint32_t timeout = 500; //ms to wait for timeout + do + { + status = read_register(OBSERVE_TX,&observe_tx,1); +// IF_SERIAL_DEBUG(Serial.print(observe_tx,HEX)); + } + while( ! ( status & ( _BV(TX_DS) | _BV(MAX_RT) ) ) && ( mainTimer.read_ms() - sent_at < timeout ) ); + + // The part above is what you could recreate with your own interrupt handler, + // and then call this when you got an interrupt + // ------------ + + // Call this when you get an interrupt + // The status tells us three things + // * The send was successful (TX_DS) + // * The send failed, too many retries (MAX_RT) + // * There is an ack packet waiting (RX_DR) + bool tx_ok, tx_fail; + whatHappened(tx_ok,tx_fail,ack_payload_available); + + //printf("%u%u%u\r\n",tx_ok,tx_fail,ack_payload_available); + + result = tx_ok; +// IF_SERIAL_DEBUG(Serial.print(result?"...OK.":"...Failed")); + + // Handle the ack packet + if ( ack_payload_available ) + { + ack_payload_length = getDynamicPayloadSize(); +// IF_SERIAL_DEBUG(Serial.print("[AckPacket]/")); +// IF_SERIAL_DEBUG(Serial.println(ack_payload_length,DEC)); + } + + // Yay, we are done. + + // Power down +// powerDown(); + + // Flush buffers (Is this a relic of past experimentation, and not needed anymore? +// flush_tx(); + + return result; +} +/****************************************************************************/ + +void RF24::startWrite( const void* buf, uint8_t len ) +{ + // Transmitter power-up + write_register(CONFIG, ( read_register(CONFIG) | _BV(PWR_UP) ) & ~_BV(PRIM_RX) ); +// wait_msMicroseconds(150); + wait_us(130); + + // Send the payload + write_payload( buf, len ); + + // Allons! + ce(HIGH); +// wait_msMicroseconds(15); + wait_us(15); + ce(LOW); +} + +/****************************************************************************/ + +uint8_t RF24::getDynamicPayloadSize(void) +{ + uint8_t result = 0; + + csn(LOW); + spi.write( R_RX_PL_WID ); + result = spi.write(0xff); + csn(HIGH); + + return result; +} + +/****************************************************************************/ + +bool RF24::available(void) +{ + return available(NULL); +} + +/****************************************************************************/ + +bool RF24::available(uint8_t* pipe_num) +{ + uint8_t status = get_status(); + + // Too noisy, enable if you really want lots o data!! + //IF_SERIAL_DEBUG(print_status(status)); + + bool result = ( status & _BV(RX_DR) ); + + if (result) + { + // If the caller wants the pipe number, include that + if ( pipe_num ) + *pipe_num = ( status >> RX_P_NO ) & 7; + + // Clear the status bit + + // ??? Should this REALLY be cleared now? Or wait until we + // actually READ the payload? + + write_register(STATUS,_BV(RX_DR) ); + + // Handle ack payload receipt + if ( status & _BV(TX_DS) ) + { + write_register(STATUS,_BV(TX_DS)); + } + } + + return result; +} + +/****************************************************************************/ + +bool RF24::read( void* buf, uint8_t len ) +{ + // Fetch the payload + read_payload( buf, len ); + + // was this the last of the data available? + return read_register(FIFO_STATUS) & _BV(RX_EMPTY); +} + +/****************************************************************************/ + +void RF24::whatHappened(bool& tx_ok,bool& tx_fail,bool& rx_ready) +{ + // Read the status & reset the status in one easy call + // Or is that such a good idea? + uint8_t status = write_register(STATUS,_BV(RX_DR) | _BV(TX_DS) | _BV(MAX_RT) ); + + // Report to the user what happened + tx_ok = status & _BV(TX_DS); + tx_fail = status & _BV(MAX_RT); + rx_ready = status & _BV(RX_DR); +} + +/****************************************************************************/ + +void RF24::openWritingPipe(uint64_t value) +{ + // Note that AVR 8-bit uC's store this LSB first, and the NRF24L01(+) + // expects it LSB first too, so we're good. + + write_register(RX_ADDR_P0, reinterpret_cast<uint8_t*>(&value), 5); + write_register(TX_ADDR, reinterpret_cast<uint8_t*>(&value), 5); + + const uint8_t max_payload_size = 32; + write_register(RX_PW_P0,min(payload_size,max_payload_size)); + + flush_tx(); +} + +/****************************************************************************/ + +static const uint8_t child_pipe[] = +{ + RX_ADDR_P0, RX_ADDR_P1, RX_ADDR_P2, RX_ADDR_P3, RX_ADDR_P4, RX_ADDR_P5 +}; +static const uint8_t child_payload_size[] = +{ + RX_PW_P0, RX_PW_P1, RX_PW_P2, RX_PW_P3, RX_PW_P4, RX_PW_P5 +}; +static const uint8_t child_pipe_enable[] = +{ + ERX_P0, ERX_P1, ERX_P2, ERX_P3, ERX_P4, ERX_P5 +}; + +void RF24::openReadingPipe(uint8_t child, uint64_t address) +{ + // If this is pipe 0, cache the address. This is needed because + // openWritingPipe() will overwrite the pipe 0 address, so + // startListening() will have to restore it. + if (child == 0) + pipe0_reading_address = address; + + if (child <= 6) + { + // For pipes 2-5, only write the LSB + if ( child < 2 ) + write_register(child_pipe[child], reinterpret_cast<const uint8_t*>(&address), 5); + else + write_register(child_pipe[child], reinterpret_cast<const uint8_t*>(&address), 1); + + write_register(child_payload_size[child],payload_size); + + // Note it would be more efficient to set all of the bits for all open + // pipes at once. However, I thought it would make the calling code + // more simple to do it this way. + write_register(EN_RXADDR,read_register(EN_RXADDR) | _BV(child_pipe_enable[child])); + } +} + +/****************************************************************************/ + +void RF24::toggle_features(void) +{ + csn(LOW); + spi.write( ACTIVATE ); + spi.write( 0x73 ); + csn(HIGH); +} + +/****************************************************************************/ + +void RF24::enableDynamicPayloads(void) +{ + // Enable dynamic payload throughout the system + write_register(FEATURE,read_register(FEATURE) | _BV(EN_DPL) ); + + // If it didn't work, the features are not enabled + if ( ! read_register(FEATURE) ) + { + // So enable them and try again + toggle_features(); + write_register(FEATURE,read_register(FEATURE) | _BV(EN_DPL) ); + } + +// IF_SERIAL_DEBUG(printf("FEATURE=%i\r\n",read_register(FEATURE))); + + // Enable dynamic payload on all pipes + // + // Not sure the use case of only having dynamic payload on certain + // pipes, so the library does not support it. + write_register(DYNPD,read_register(DYNPD) | _BV(DPL_P5) | _BV(DPL_P4) | _BV(DPL_P3) | _BV(DPL_P2) | _BV(DPL_P1) | _BV(DPL_P0)); + + dynamic_payloads_enabled = true; +} + +/****************************************************************************/ + +void RF24::enableAckPayload(void) +{ + // + // enable ack payload and dynamic payload features + // + + write_register(FEATURE,read_register(FEATURE) | _BV(EN_ACK_PAY) | _BV(EN_DPL) ); + + // If it didn't work, the features are not enabled + if ( ! read_register(FEATURE) ) + { + // So enable them and try again + toggle_features(); + write_register(FEATURE,read_register(FEATURE) | _BV(EN_ACK_PAY) | _BV(EN_DPL) ); + } + +// IF_SERIAL_DEBUG(printf("FEATURE=%i\r\n",read_register(FEATURE))); + + // + // Enable dynamic payload on pipes 0 & 1 + // + + write_register(DYNPD,read_register(DYNPD) | _BV(DPL_P1) | _BV(DPL_P0)); +} + +/****************************************************************************/ + +void RF24::writeAckPayload(uint8_t pipe, const void* buf, uint8_t len) +{ + const uint8_t* current = reinterpret_cast<const uint8_t*>(buf); + + csn(LOW); + spi.write( W_ACK_PAYLOAD | ( pipe & 7 ) ); + const uint8_t max_payload_size = 32; + uint8_t data_len = min(len,max_payload_size); + while ( data_len-- ) + spi.write(*current++); + + csn(HIGH); +} + +/****************************************************************************/ + +bool RF24::isAckPayloadAvailable(void) +{ + bool result = ack_payload_available; + ack_payload_available = false; + return result; +} + +/****************************************************************************/ + +bool RF24::isPVariant(void) +{ + return p_variant ; +} + +/****************************************************************************/ + +void RF24::setAutoAck(bool enable) +{ + if ( enable ) + write_register(EN_AA, 63); + else + write_register(EN_AA, 0); +} + +/****************************************************************************/ + +void RF24::setAutoAck( uint8_t pipe, bool enable ) +{ + if ( pipe <= 6 ) + { + uint8_t en_aa = read_register( EN_AA ) ; + if( enable ) + { + en_aa |= _BV(pipe) ; + } + else + { + en_aa &= ~_BV(pipe) ; + } + write_register( EN_AA, en_aa ) ; + } +} + +/****************************************************************************/ + +bool RF24::testCarrier(void) +{ + return ( read_register(CD) & 1 ); +} + +/****************************************************************************/ + +bool RF24::testRPD(void) +{ + return ( read_register(RPD) & 1 ) ; +} + +/****************************************************************************/ + +void RF24::setPALevel(rf24_pa_dbm_e level) +{ + uint8_t setup = read_register(RF_SETUP) ; + setup &= ~(_BV(RF_PWR_LOW) | _BV(RF_PWR_HIGH)) ; + + // switch uses RAM (evil!) + if ( level == RF24_PA_MAX ) + { + setup |= (_BV(RF_PWR_LOW) | _BV(RF_PWR_HIGH)) ; + } + else if ( level == RF24_PA_HIGH ) + { + setup |= _BV(RF_PWR_HIGH) ; + } + else if ( level == RF24_PA_LOW ) + { + setup |= _BV(RF_PWR_LOW); + } + else if ( level == RF24_PA_MIN ) + { + // nothing + } + else if ( level == RF24_PA_ERROR ) + { + // On error, go to maximum PA + setup |= (_BV(RF_PWR_LOW) | _BV(RF_PWR_HIGH)) ; + } + + write_register( RF_SETUP, setup ) ; +} + +/****************************************************************************/ + +rf24_pa_dbm_e RF24::getPALevel(void) +{ + rf24_pa_dbm_e result = RF24_PA_ERROR ; + uint8_t power = read_register(RF_SETUP) & (_BV(RF_PWR_LOW) | _BV(RF_PWR_HIGH)) ; + + // switch uses RAM (evil!) + if ( power == (_BV(RF_PWR_LOW) | _BV(RF_PWR_HIGH)) ) + { + result = RF24_PA_MAX ; + } + else if ( power == _BV(RF_PWR_HIGH) ) + { + result = RF24_PA_HIGH ; + } + else if ( power == _BV(RF_PWR_LOW) ) + { + result = RF24_PA_LOW ; + } + else + { + result = RF24_PA_MIN ; + } + + return result ; +} + +/****************************************************************************/ + +bool RF24::setDataRate(rf24_datarate_e speed) +{ + bool result = false; + uint8_t setup = read_register(RF_SETUP) ; + + // HIGH and LOW '00' is 1Mbs - our default + wide_band = false ; + setup &= ~(_BV(RF_DR_LOW) | _BV(RF_DR_HIGH)) ; + if( speed == RF24_250KBPS ) + { + // Must set the RF_DR_LOW to 1; RF_DR_HIGH (used to be RF_DR) is already 0 + // Making it '10'. + wide_band = false ; + setup |= _BV( RF_DR_LOW ) ; + } + else + { + // Set 2Mbs, RF_DR (RF_DR_HIGH) is set 1 + // Making it '01' + if ( speed == RF24_2MBPS ) + { + wide_band = true ; + setup |= _BV(RF_DR_HIGH); + } + else + { + // 1Mbs + wide_band = false ; + } + } + write_register(RF_SETUP,setup); + + // Verify our result + if ( read_register(RF_SETUP) == setup ) + { + result = true; + } + else + { + wide_band = false; + } + + return result; +} + +/****************************************************************************/ + +rf24_datarate_e RF24::getDataRate( void ) +{ + rf24_datarate_e result ; + uint8_t dr = read_register(RF_SETUP) & (_BV(RF_DR_LOW) | _BV(RF_DR_HIGH)); + + // switch uses RAM (evil!) + // Order matters in our case below + if ( dr == _BV(RF_DR_LOW) ) + { + // '10' = 250KBPS + result = RF24_250KBPS ; + } + else if ( dr == _BV(RF_DR_HIGH) ) + { + // '01' = 2MBPS + result = RF24_2MBPS ; + } + else + { + // '00' = 1MBPS + result = RF24_1MBPS ; + } + return result ; +} + +/****************************************************************************/ + +void RF24::setCRCLength(rf24_crclength_e length) +{ + uint8_t config = read_register(CONFIG) & ~( _BV(CRCO) | _BV(EN_CRC)) ; + + if ( length == RF24_CRC_DISABLED ) + { + // Do nothing, we turned it off above. + } + else if ( length == RF24_CRC_8 ) + { + config |= _BV(EN_CRC); + } + else + { + config |= _BV(EN_CRC); + config |= _BV( CRCO ); + } + write_register( CONFIG, config ) ; +} + +/****************************************************************************/ + +rf24_crclength_e RF24::getCRCLength(void) +{ + rf24_crclength_e result = RF24_CRC_DISABLED; + uint8_t config = read_register(CONFIG) & ( _BV(CRCO) | _BV(EN_CRC)) ; + + if ( config & _BV(EN_CRC ) ) + { + if ( config & _BV(CRCO) ) + result = RF24_CRC_16; + else + result = RF24_CRC_8; + } + + return result; +} + +/****************************************************************************/ + +void RF24::disableCRC( void ) +{ + uint8_t disable = read_register(CONFIG) & ~_BV(EN_CRC) ; + write_register( CONFIG, disable ) ; +} + +/****************************************************************************/ +void RF24::setRetries(uint8_t delay, uint8_t count) +{ + write_register(SETUP_RETR,(delay&0xf)<<ARD | (count&0xf)<<ARC); +} + +uint8_t RF24::min(uint8_t a, uint8_t b) +{ + if(a < b) + return a; + else + return b; +}
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/nRF24L01P_Maniacbug/nRF24L01P_Maniacbug.h Mon Jul 06 03:17:33 2015 +0000 @@ -0,0 +1,779 @@ +/* + Copyright (c) 2007 Stefan Engelke <mbox@stefanengelke.de> + + Permission is hereby granted, free of charge, to any person + obtaining a copy of this software and associated documentation + files (the "Software"), to deal in the Software without + restriction, including without limitation the rights to use, copy, + modify, merge, publish, distribute, sublicense, and/or sell copies + of the Software, and to permit persons to whom the Software is + furnished to do so, subject to the following conditions: + + The above copyright notice and this permission notice shall be + included in all copies or substantial portions of the Software. + + THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, + EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF + MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND + NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT + HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, + WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, + OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER + DEALINGS IN THE SOFTWARE. +*/ + +/* Memory Map */ +#define CONFIG 0x00 +#define EN_AA 0x01 +#define EN_RXADDR 0x02 +#define SETUP_AW 0x03 +#define SETUP_RETR 0x04 +#define RF_CH 0x05 +#define RF_SETUP 0x06 +#define STATUS 0x07 +#define OBSERVE_TX 0x08 +#define CD 0x09 +#define RX_ADDR_P0 0x0A +#define RX_ADDR_P1 0x0B +#define RX_ADDR_P2 0x0C +#define RX_ADDR_P3 0x0D +#define RX_ADDR_P4 0x0E +#define RX_ADDR_P5 0x0F +#define TX_ADDR 0x10 +#define RX_PW_P0 0x11 +#define RX_PW_P1 0x12 +#define RX_PW_P2 0x13 +#define RX_PW_P3 0x14 +#define RX_PW_P4 0x15 +#define RX_PW_P5 0x16 +#define FIFO_STATUS 0x17 +#define DYNPD 0x1C +#define FEATURE 0x1D + +/* Bit Mnemonics */ +#define MASK_RX_DR 6 +#define MASK_TX_DS 5 +#define MASK_MAX_RT 4 +#define EN_CRC 3 +#define CRCO 2 +#define PWR_UP 1 +#define PRIM_RX 0 +#define ENAA_P5 5 +#define ENAA_P4 4 +#define ENAA_P3 3 +#define ENAA_P2 2 +#define ENAA_P1 1 +#define ENAA_P0 0 +#define ERX_P5 5 +#define ERX_P4 4 +#define ERX_P3 3 +#define ERX_P2 2 +#define ERX_P1 1 +#define ERX_P0 0 +#define AW 0 +#define ARD 4 +#define ARC 0 +#define PLL_LOCK 4 +#define RF_DR 3 +#define RF_PWR 6 +#define RX_DR 6 +#define TX_DS 5 +#define MAX_RT 4 +#define RX_P_NO 1 +#define TX_FULL 0 +#define PLOS_CNT 4 +#define ARC_CNT 0 +#define TX_REUSE 6 +#define FIFO_FULL 5 +#define TX_EMPTY 4 +#define RX_FULL 1 +#define RX_EMPTY 0 +#define DPL_P5 5 +#define DPL_P4 4 +#define DPL_P3 3 +#define DPL_P2 2 +#define DPL_P1 1 +#define DPL_P0 0 +#define EN_DPL 2 +#define EN_ACK_PAY 1 +#define EN_DYN_ACK 0 + +/* Instruction Mnemonics */ +#define R_REGISTER 0x00 +#define W_REGISTER 0x20 +#define REGISTER_MASK 0x1F +#define ACTIVATE 0x50 +#define R_RX_PL_WID 0x60 +#define R_RX_PAYLOAD 0x61 +#define W_TX_PAYLOAD 0xA0 +#define W_ACK_PAYLOAD 0xA8 +#define FLUSH_TX 0xE1 +#define FLUSH_RX 0xE2 +#define REUSE_TX_PL 0xE3 +#define NOP 0xFF + +/* Non-P omissions */ +#define LNA_HCURR 0 + +/* P model memory Map */ +#define RPD 0x09 + +/* P model bit Mnemonics */ +#define RF_DR_LOW 5 +#define RF_DR_HIGH 3 +#define RF_PWR_LOW 1 +#define RF_PWR_HIGH 2 + +#define HIGH 1 +#define LOW 0 +#define _BV(n) (1 << n) + +/* + Copyright (C) 2011 J. Coliz <maniacbug@ymail.com> + + This program is free software; you can redistribute it and/or + modify it under the terms of the GNU General Public License + version 2 as published by the Free Software Foundation. + */ + +/** + * @file RF24.h + * + * Class declaration for RF24 and helper enums + */ + +#ifndef __RF24_H__ +#define __RF24_H__ + +#include <mbed.h> + +/** + * Power Amplifier level. + * + * For use with setPALevel() + */ +typedef enum { RF24_PA_MIN = 0,RF24_PA_LOW, RF24_PA_HIGH, RF24_PA_MAX, RF24_PA_ERROR } rf24_pa_dbm_e ; + +/** + * Data rate. How fast data moves through the air. + * + * For use with setDataRate() + */ +typedef enum { RF24_1MBPS = 0, RF24_2MBPS, RF24_250KBPS } rf24_datarate_e; + +/** + * CRC Length. How big (if any) of a CRC is included. + * + * For use with setCRCLength() + */ +typedef enum { RF24_CRC_DISABLED = 0, RF24_CRC_8, RF24_CRC_16 } rf24_crclength_e; + +/** + * Driver for nRF24L01(+) 2.4GHz Wireless Transceiver + */ + +class RF24 +{ +private: + DigitalOut ce_pin; /**< "Chip Enable" pin, activates the RX or TX role */ + DigitalOut csn_pin; /**< SPI Chip select */ + bool wide_band; /* 2Mbs data rate in use? */ + bool p_variant; /* False for RF24L01 and true for RF24L01P */ + uint8_t payload_size; /**< Fixed size of payloads */ + bool ack_payload_available; /**< Whether there is an ack payload waiting */ + bool dynamic_payloads_enabled; /**< Whether dynamic payloads are enabled. */ + uint8_t ack_payload_length; /**< Dynamic size of pending ack payload. */ + uint64_t pipe0_reading_address; /**< Last address set on pipe 0 for reading. */ + SPI spi; + Timer mainTimer; + +protected: + /** + * @name Low-level internal interface. + * + * Protected methods that address the chip directly. Regular users cannot + * ever call these. They are documented for completeness and for developers who + * may want to extend this class. + */ + /**@{*/ + + /** + * Set chip select pin + * + * Running SPI bus at PI_CLOCK_DIV2 so we don't waste time transferring data + * and best of all, we make use of the radio's FIFO buffers. A lower speed + * means we're less likely to effectively leverage our FIFOs and pay a higher + * AVR runtime cost as toll. + * + * @param mode HIGH to take this unit off the SPI bus, LOW to put it on + */ + void csn(int mode); + + /** + * Set chip enable + * + * @param level HIGH to actively begin transmission or LOW to put in standby. Please see data sheet + * for a much more detailed description of this pin. + */ + void ce(int level); + + + /** + * Read a chunk of data in from a register + * + * @param reg Which register. Use constants from nRF24L01.h + * @param buf Where to put the data + * @param len How many bytes of data to transfer + * @return Current value of status register + */ + uint8_t read_register(uint8_t reg, uint8_t* buf, uint8_t len); + + /** + * Read single byte from a register + * + * @param reg Which register. Use constants from nRF24L01.h + * @return Current value of register @p reg + */ + uint8_t read_register(uint8_t reg); + + /** + * Write a chunk of data to a register + * + * @param reg Which register. Use constants from nRF24L01.h + * @param buf Where to get the data + * @param len How many bytes of data to transfer + * @return Current value of status register + */ + uint8_t write_register(uint8_t reg, const uint8_t* buf, uint8_t len); + + /** + * Write a single byte to a register + * + * @param reg Which register. Use constants from nRF24L01.h + * @param value The new value to write + * @return Current value of status register + */ + uint8_t write_register(uint8_t reg, uint8_t value); + + /** + * Write the transmit payload + * + * The size of data written is the fixed payload size, see getPayloadSize() + * + * @param buf Where to get the data + * @param len Number of bytes to be sent + * @return Current value of status register + */ + uint8_t write_payload(const void* buf, uint8_t len); + + /** + * Read the receive payload + * + * The size of data read is the fixed payload size, see getPayloadSize() + * + * @param buf Where to put the data + * @param len Maximum number of bytes to read + * @return Current value of status register + */ + uint8_t read_payload(void* buf, uint8_t len); + + + /** + * Decode and print the given status to stdout + * + * @param status Status value to print + * + * @warning Does nothing if stdout is not defined. See fdevopen in stdio.h + */ + void print_status(uint8_t status); + + /** + * Decode and print the given 'observe_tx' value to stdout + * + * @param value The observe_tx value to print + * + * @warning Does nothing if stdout is not defined. See fdevopen in stdio.h + */ + void print_observe_tx(uint8_t value); + + /** + * Print the name and value of an 8-bit register to stdout + * + * Optionally it can print some quantity of successive + * registers on the same line. This is useful for printing a group + * of related registers on one line. + * + * @param name Name of the register + * @param reg Which register. Use constants from nRF24L01.h + * @param qty How many successive registers to print + */ + void print_byte_register(const char* name, uint8_t reg, uint8_t qty = 1); + + /** + * Print the name and value of a 40-bit address register to stdout + * + * Optionally it can print some quantity of successive + * registers on the same line. This is useful for printing a group + * of related registers on one line. + * + * @param name Name of the register + * @param reg Which register. Use constants from nRF24L01.h + * @param qty How many successive registers to print + */ + void print_address_register(const char* name, uint8_t reg, uint8_t qty = 1); + + /** + * Turn on or off the special features of the chip + * + * The chip has certain 'features' which are only available when the 'features' + * are enabled. See the datasheet for details. + */ + void toggle_features(void); + /**@}*/ + +public: + /** + * @name Primary public interface + * + * These are the main methods you need to operate the chip + */ + /**@{*/ + + /** + * Constructor + * + * Creates a new instance of this driver. Before using, you create an instance + * and send in the unique pins that this chip is connected to. + * + * @param _cepin The pin attached to Chip Enable on the RF module + * @param _cspin The pin attached to Chip Select + */ + RF24(PinName mosi, PinName miso, PinName sck, PinName _csnpin, PinName _cepin); + + /** + * Begin operation of the chip + * + * Call this in setup(), before calling any other methods. + */ + void begin(void); + + /** + * Retrieve the current status of the chip + * + * @return Current value of status register + */ + uint8_t get_status(void); + + /** + * Empty the receive buffer + * + * @return Current value of status register + */ + uint8_t flush_rx(void); + + /** + * Empty the transmit buffer + * + * @return Current value of status register + */ + uint8_t flush_tx(void); + + /** + * Start listening on the pipes opened for reading. + * + * Be sure to call openReadingPipe() first. Do not call write() while + * in this mode, without first calling stopListening(). Call + * isAvailable() to check for incoming traffic, and read() to get it. + */ + void startListening(void); + + /** + * Stop listening for incoming messages + * + * Do this before calling write(). + */ + void stopListening(void); + + /** + * Write to the open writing pipe + * + * Be sure to call openWritingPipe() first to set the destination + * of where to write to. + * + * This blocks until the message is successfully acknowledged by + * the receiver or the timeout/retransmit maxima are reached. In + * the current configuration, the max delay here is 60ms. + * + * The maximum size of data written is the fixed payload size, see + * getPayloadSize(). However, you can write less, and the remainder + * will just be filled with zeroes. + * + * @param buf Pointer to the data to be sent + * @param len Number of bytes to be sent + * @return True if the payload was delivered successfully false if not + */ + bool write( const void* buf, uint8_t len ); + + /** + * Test whether there are bytes available to be read + * + * @return True if there is a payload available, false if none is + */ + bool available(void); + + /** + * Read the payload + * + * Return the last payload received + * + * The size of data read is the fixed payload size, see getPayloadSize() + * + * @note I specifically chose 'void*' as a data type to make it easier + * for beginners to use. No casting needed. + * + * @param buf Pointer to a buffer where the data should be written + * @param len Maximum number of bytes to read into the buffer + * @return True if the payload was delivered successfully false if not + */ + bool read( void* buf, uint8_t len ); + + /** + * Open a pipe for writing + * + * Only one pipe can be open at once, but you can change the pipe + * you'll listen to. Do not call this while actively listening. + * Remember to stopListening() first. + * + * Addresses are 40-bit hex values, e.g.: + * + * @code + * openWritingPipe(0xF0F0F0F0F0); + * @endcode + * + * @param address The 40-bit address of the pipe to open. This can be + * any value whatsoever, as long as you are the only one writing to it + * and only one other radio is listening to it. Coordinate these pipe + * addresses amongst nodes on the network. + */ + void openWritingPipe(uint64_t address); + + /** + * Open a pipe for reading + * + * Up to 6 pipes can be open for reading at once. Open all the + * reading pipes, and then call startListening(). + * + * @see openWritingPipe + * + * @warning Pipes 1-5 should share the first 32 bits. + * Only the least significant byte should be unique, e.g. + * @code + * openReadingPipe(1,0xF0F0F0F0AA); + * openReadingPipe(2,0xF0F0F0F066); + * @endcode + * + * @warning Pipe 0 is also used by the writing pipe. So if you open + * pipe 0 for reading, and then startListening(), it will overwrite the + * writing pipe. Ergo, do an openWritingPipe() again before write(). + * + * @todo Enforce the restriction that pipes 1-5 must share the top 32 bits + * + * @param number Which pipe# to open, 0-5. + * @param address The 40-bit address of the pipe to open. + */ + void openReadingPipe(uint8_t number, uint64_t address); + + /**@}*/ + /** + * @name Optional Configurators + * + * Methods you can use to get or set the configuration of the chip. + * None are required. Calling begin() sets up a reasonable set of + * defaults. + */ + /**@{*/ + /** + * Set the number and delay of retries upon failed submit + * + * @param delay How long to wait between each retry, in multiples of 250us, + * max is 15. 0 means 250us, 15 means 4000us. + * @param count How many retries before giving up, max 15 + */ + void setRetries(uint8_t delay, uint8_t count); + + /** + * Set RF communication channel + * + * @param channel Which RF channel to communicate on, 0-127 + */ + void setChannel(uint8_t channel); + + /** + * Set Static Payload Size + * + * This implementation uses a pre-stablished fixed payload size for all + * transmissions. If this method is never called, the driver will always + * transmit the maximum payload size (32 bytes), no matter how much + * was sent to write(). + * + * @todo Implement variable-sized payloads feature + * + * @param size The number of bytes in the payload + */ + void setPayloadSize(uint8_t size); + + /** + * Get Static Payload Size + * + * @see setPayloadSize() + * + * @return The number of bytes in the payload + */ + uint8_t getPayloadSize(void); + + /** + * Get Dynamic Payload Size + * + * For dynamic payloads, this pulls the size of the payload off + * the chip + * + * @return Payload length of last-received dynamic payload + */ + uint8_t getDynamicPayloadSize(void); + + /** + * Enable custom payloads on the acknowledge packets + * + * Ack payloads are a handy way to return data back to senders without + * manually changing the radio modes on both units. + * + * @see examples/pingpair_pl/pingpair_pl.pde + */ + void enableAckPayload(void); + + /** + * Enable dynamically-sized payloads + * + * This way you don't always have to send large packets just to send them + * once in a while. This enables dynamic payloads on ALL pipes. + * + * @see examples/pingpair_pl/pingpair_dyn.pde + */ + void enableDynamicPayloads(void); + + /** + * Determine whether the hardware is an nRF24L01+ or not. + * + * @return true if the hardware is nRF24L01+ (or compatible) and false + * if its not. + */ + bool isPVariant(void) ; + + /** + * Enable or disable auto-acknowlede packets + * + * This is enabled by default, so it's only needed if you want to turn + * it off for some reason. + * + * @param enable Whether to enable (true) or disable (false) auto-acks + */ + void setAutoAck(bool enable); + + /** + * Enable or disable auto-acknowlede packets on a per pipeline basis. + * + * AA is enabled by default, so it's only needed if you want to turn + * it off/on for some reason on a per pipeline basis. + * + * @param pipe Which pipeline to modify + * @param enable Whether to enable (true) or disable (false) auto-acks + */ + void setAutoAck( uint8_t pipe, bool enable ) ; + + /** + * Set Power Amplifier (PA) level to one of four levels. + * Relative mnemonics have been used to allow for future PA level + * changes. According to 6.5 of the nRF24L01+ specification sheet, + * they translate to: RF24_PA_MIN=-18dBm, RF24_PA_LOW=-12dBm, + * RF24_PA_MED=-6dBM, and RF24_PA_HIGH=0dBm. + * + * @param level Desired PA level. + */ + void setPALevel( rf24_pa_dbm_e level ) ; + + /** + * Fetches the current PA level. + * + * @return Returns a value from the rf24_pa_dbm_e enum describing + * the current PA setting. Please remember, all values represented + * by the enum mnemonics are negative dBm. See setPALevel for + * return value descriptions. + */ + rf24_pa_dbm_e getPALevel( void ) ; + + /** + * Set the transmission data rate + * + * @warning setting RF24_250KBPS will fail for non-plus units + * + * @param speed RF24_250KBPS for 250kbs, RF24_1MBPS for 1Mbps, or RF24_2MBPS for 2Mbps + * @return true if the change was successful + */ + bool setDataRate(rf24_datarate_e speed); + + /** + * Fetches the transmission data rate + * + * @return Returns the hardware's currently configured datarate. The value + * is one of 250kbs, RF24_1MBPS for 1Mbps, or RF24_2MBPS, as defined in the + * rf24_datarate_e enum. + */ + rf24_datarate_e getDataRate( void ) ; + + /** + * Set the CRC length + * + * @param length RF24_CRC_8 for 8-bit or RF24_CRC_16 for 16-bit + */ + void setCRCLength(rf24_crclength_e length); + + /** + * Get the CRC length + * + * @return RF24_DISABLED if disabled or RF24_CRC_8 for 8-bit or RF24_CRC_16 for 16-bit + */ + rf24_crclength_e getCRCLength(void); + + /** + * Disable CRC validation + * + */ + void disableCRC( void ) ; + + /**@}*/ + /** + * @name Advanced Operation + * + * Methods you can use to drive the chip in more advanced ways + */ + /**@{*/ + + /** + * Print a giant block of debugging information to stdout + * + * @warning Does nothing if stdout is not defined. See fdevopen in stdio.h + */ + void printDetails(void); + + /** + * Enter low-power mode + * + * To return to normal power mode, either write() some data or + * startListening, or powerUp(). + */ + void powerDown(void); + + /** + * Leave low-power mode - making radio more responsive + * + * To return to low power mode, call powerDown(). + */ + void powerUp(void) ; + + /** + * Test whether there are bytes available to be read + * + * Use this version to discover on which pipe the message + * arrived. + * + * @param[out] pipe_num Which pipe has the payload available + * @return True if there is a payload available, false if none is + */ + bool available(uint8_t* pipe_num); + + /** + * Non-blocking write to the open writing pipe + * + * Just like write(), but it returns immediately. To find out what happened + * to the send, catch the IRQ and then call whatHappened(). + * + * @see write() + * @see whatHappened() + * + * @param buf Pointer to the data to be sent + * @param len Number of bytes to be sent + * @return True if the payload was delivered successfully false if not + */ + void startWrite( const void* buf, uint8_t len ); + + /** + * Write an ack payload for the specified pipe + * + * The next time a message is received on @p pipe, the data in @p buf will + * be sent back in the acknowledgement. + * + * @warning According to the data sheet, only three of these can be pending + * at any time. I have not tested this. + * + * @param pipe Which pipe# (typically 1-5) will get this response. + * @param buf Pointer to data that is sent + * @param len Length of the data to send, up to 32 bytes max. Not affected + * by the static payload set by setPayloadSize(). + */ + void writeAckPayload(uint8_t pipe, const void* buf, uint8_t len); + + /** + * Determine if an ack payload was received in the most recent call to + * write(). + * + * Call read() to retrieve the ack payload. + * + * @warning Calling this function clears the internal flag which indicates + * a payload is available. If it returns true, you must read the packet + * out as the very next interaction with the radio, or the results are + * undefined. + * + * @return True if an ack payload is available. + */ + bool isAckPayloadAvailable(void); + + /** + * Call this when you get an interrupt to find out why + * + * Tells you what caused the interrupt, and clears the state of + * interrupts. + * + * @param[out] tx_ok The send was successful (TX_DS) + * @param[out] tx_fail The send failed, too many retries (MAX_RT) + * @param[out] rx_ready There is a message waiting to be read (RX_DS) + */ + void whatHappened(bool& tx_ok,bool& tx_fail,bool& rx_ready); + + /** + * Test whether there was a carrier on the line for the + * previous listening period. + * + * Useful to check for interference on the current channel. + * + * @return true if was carrier, false if not + */ + bool testCarrier(void); + + /** + * Test whether a signal (carrier or otherwise) greater than + * or equal to -64dBm is present on the channel. Valid only + * on nRF24L01P (+) hardware. On nRF24L01, use testCarrier(). + * + * Useful to check for interference on the current channel and + * channel hopping strategies. + * + * @return true if signal => -64dBm, false if not + */ + bool testRPD(void) ; + + uint8_t min(uint8_t, uint8_t); +}; + + +#endif // __RF24_H__ +// vim:ai:cin:sts=2 sw=2 ft=cpp