Driver for CC3000 Wi-Fi module

Dependencies:   NVIC_set_all_priorities

Dependents:   CC3000_Simple_Socket Wi-Go_IOT_Demo

Information

The current code has been reworked to a full object oriented application and contains an mbed socket compatible API.

CC3000 Wi-Fi module library

Info

This is the low level driver for TI's SimpleLink CC3000 device.
Port from Avnet's Wi-Go KEIL code (based on TI's CC3000 code).
Special thanks to Jim Carver from Avnet for providing the Wi-Go board and for his assistance.

Differences with TI's original code

The code functionality stays exactly the same.
In order to make it easier to use the code, following changes were made :

  • Addition of a tool to shift all IRQ priorities to a lower level since it is very important to keep the SPI handler at the highest system priority, the WLAN interrupt the second highest and all other system interrupts at a lower priority, so their handlers can be preempted by the CC3000 interrupts.
  • Addition of low level I/O controls and conditional compiler controls in cc3000_common.h.
  • CC3000 initialisation, pin declarations, SPI and WLAN irq priorities are set in Init_HostDriver , we need to call this function at the start of the main function.
  • The SPI and HCI code are joined into one file.
  • The include list has been rearranged - Only #include "wlan.h" is needed in the user API.
  • Part of the CC3000's user eeprom memory is used to store additional info (52 bytes in NVMEM_USER_FILE_1):
# bytesDescriptionInfo
1First time config parameterUseful when connecting
2Firmware updater versionused with the Firmware update tool
2Service Pack versionused with the Firmware update tool
3Driver Versionused with the Firmware update tool
3Firmware Versionused with the Firmware update tool
1CIK validation (Client Interface Key)
40CIK data (Client Interface Key)used with the exosite

Using the Library

A user API is needed to access the CC3000 functions.
Examples:

Using the library with other processors

cc3000_common.cpp loads the irq tool for all targets:
All current mbed targets are supported by this library.

#include "NVIC_set_all_priorities.h"


All low level settings that need to change are available in cc3000_common.h

//*****************************************************************************
//              PIN CONTROLS & COMPILE CONTROLS
//*****************************************************************************
// Compiler control
#define CC3000_UNENCRYPTED_SMART_CONFIG   // No encryption
//#define CC3000_TINY_DRIVER                // Driver for small memory model CPUs

//Interrupt controls
#define NVIC_ALL_IRQ        NVIC_set_all_irq_priorities(3);         // Set ALL interrupt priorities to level 3
#define NVIC_SPI_IRQ        NVIC_SetPriority(SPI0_IRQn, 0x0);       // Wi-Fi SPI interrupt must be higher priority than SysTick
#define NVIC_PORT_IRQ       NVIC_SetPriority(PORTA_IRQn, 0x1);
#define NVIC_SYSTICK_IRQ    NVIC_SetPriority(SysTick_IRQn, 0x2);    // SysTick set to lower priority than Wi-Fi SPI bus interrupt
//#define NVIC_ADC_IRQ        NVIC_SetPriority(ADC0_IRQn, 0x3);       // ADC is the lowest of all

// Wlan controls
#define WLAN_ISF_PCR        PORTA->PCR[16]
#define WLAN_ISF_ISFR       PORTA->ISFR
#define WLAN_ISF_MASK       (1<<16)

#define WLAN_ASSERT_CS      wlan_cs = 0;   //CS : active low
#define WLAN_DEASSERT_CS    wlan_cs = 1;

#define WLAN_ASSERT_EN      wlan_en = 1;   //EN : active high
#define WLAN_DEASSERT_EN    wlan_en = 0;

#define WLAN_READ_IRQ       wlan_int

#define WLAN_ENABLE_IRQ     wlan_int.fall(&WLAN_IRQHandler);
#define WLAN_DISABLE_IRQ    wlan_int.fall(NULL);

#define WLAN_IRQ_PIN_CREATE         InterruptIn wlan_int (PTA16);
#define WLAN_EN_PIN_CREATE          DigitalOut  wlan_en  (PTA13);
#define WLAN_CS_PIN_CREATE          DigitalOut  wlan_cs  (PTD0);
#define WLAN_SPI_PORT_CREATE        SPI wlan(PTD2, PTD3, PTC5); // mosi, miso, sclk

#define WLAN_SPI_PORT_INIT          wlan.format(8,1);
#define WLAN_SPI_SET_FREQ           wlan.frequency(12000000);
#define WLAN_SPI_SET_IRQ_HANDLER    wlan_int.fall(&WLAN_IRQHandler);

#define WLAN_SPI_WRITE              wlan.write(*data++);
#define WLAN_SPI_READ               wlan.write(0x03);          // !! DO NOT MODIFY the 0x03 parameter (CC3000 will not respond).

API documentation

Due to a little problem with the links on the mbed site, the API documentation is not directly accessible (will be solved in a next release).
Currently, it is only accessible by adding modules.html to the API doc link: http://mbed.org/users/frankvnk/code/CC3000_Hostdriver/docs/tip/modules.html

Revision:
0:c44f0314d6ec
Child:
1:bbcaf0b2f367
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/cc3000_common.h	Fri Jun 28 17:48:37 2013 +0000
@@ -0,0 +1,357 @@
+/*****************************************************************************
+*
+*  cc3000_common.h  - CC3000 Host Driver Implementation.
+*  Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
+*
+*  Redistribution and use in source and binary forms, with or without
+*  modification, are permitted provided that the following conditions
+*  are met:
+*
+*    Redistributions of source code must retain the above copyright
+*    notice, this list of conditions and the following disclaimer.
+*
+*    Redistributions in binary form must reproduce the above copyright
+*    notice, this list of conditions and the following disclaimer in the
+*    documentation and/or other materials provided with the   
+*    distribution.
+*
+*    Neither the name of Texas Instruments Incorporated nor the names of
+*    its contributors may be used to endorse or promote products derived
+*    from this software without specific prior written permission.
+*
+*  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 
+*  "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 
+*  LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+*  A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 
+*  OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 
+*  SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 
+*  LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+*  DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+*  THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 
+*  (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 
+*  OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+*
+*****************************************************************************/
+#ifndef __COMMON_H__
+#define __COMMON_H__
+
+//******************************************************************************
+// Include files
+//******************************************************************************
+//#include "mbed.h"
+#include <errno.h>
+
+/** CC3000 Host driver - common
+*
+*/
+//*****************************************************************************
+//
+// If building with a C++ compiler, make all of the definitions in this header
+// have a C binding.
+//
+//*****************************************************************************
+#ifdef  __cplusplus
+extern "C" {
+#endif
+
+//*****************************************************************************
+//                  ERROR CODES
+//*****************************************************************************
+#define ESUCCESS        0
+#define EFAIL          -1
+#define EERROR          EFAIL
+
+//*****************************************************************************
+//                  COMMON DEFINES
+//*****************************************************************************
+#define ERROR_SOCKET_INACTIVE   -57 
+
+#define HCI_CC_PAYLOAD_LEN      5
+
+#define WLAN_ENABLE      (1)   
+#define WLAN_DISABLE     (0)
+
+
+#define    MAC_ADDR_LEN    (6)
+
+
+
+/*Defines for minimal and maximal RX buffer size. This size includes the spi 
+  header and hci header.
+  The maximal buffer size derives from:
+    MTU + HCI header + SPI header + sendto() agrs size
+  The minimum buffer size derives from:
+    HCI header + SPI header + max args size
+
+  This buffer is used for receiving events and data.
+  The packet can not be longer than MTU size and CC3000 does not support 
+  fragmentation. Note that the same buffer is used for reception of the data 
+  and events from CC3000. That is why the minimum is defined. 
+  The calculation for the actual size of buffer for reception is:
+  Given the maximal data size MAX_DATA that is expected to be received by
+  application, the required buffer is:
+  Using recv() or recvfrom():
+ 
+    max(CC3000_MINIMAL_RX_SIZE, MAX_DATA + HEADERS_SIZE_DATA + fromlen
+    + ucArgsize + 1)
+ 
+  Using gethostbyname() with minimal buffer size will limit the host name
+  returned to 99 bytes only.
+  The 1 is used for the overrun detection 
+*/
+
+#define CC3000_MINIMAL_RX_SIZE      (118+1)
+#define CC3000_MAXIMAL_RX_SIZE      (1519 + 1)
+
+/*Defines for minimal and maximal TX buffer size.
+  This buffer is used for sending events and data.
+  The packet can not be longer than MTU size and CC3000 does not support 
+  fragmentation. Note that the same buffer is used for transmission of the data
+  and commands. That is why the minimum is defined.
+  The calculation for the actual size of buffer for transmission is:
+  Given the maximal data size MAX_DATA, the required buffer is:
+  Using Sendto():
+ 
+   max(CC3000_MINIMAL_TX_SIZE, MAX_DATA + SPI_HEADER_SIZE
+   + SOCKET_SENDTO_PARAMS_LEN + SIMPLE_LINK_HCI_DATA_HEADER_SIZE + 1)
+ 
+  Using Send():
+ 
+   max(CC3000_MINIMAL_TX_SIZE, MAX_DATA + SPI_HEADER_SIZE
+   + HCI_CMND_SEND_ARG_LENGTH + SIMPLE_LINK_HCI_DATA_HEADER_SIZE + 1)
+ 
+  The 1 is used for the overrun detection */ 
+
+#define  CC3000_MINIMAL_TX_SIZE      (118 + 1) 
+#define CC3000_MAXIMAL_TX_SIZE      (1519 + 1)
+
+//TX and RX buffer sizes - allow to receive and transmit maximum data at lengh 8.
+#ifdef CC3000_TINY_DRIVER
+#define TINY_CC3000_MAXIMAL_RX_SIZE 44
+#define TINY_CC3000_MAXIMAL_TX_SIZE 59
+#endif
+
+/*In order to determine your preferred buffer size, 
+  change CC3000_MAXIMAL_RX_SIZE and CC3000_MAXIMAL_TX_SIZE to a value between
+  the minimal and maximal specified above. 
+  Note that the buffers are allocated by SPI.
+  In case you change the size of those buffers, you might need also to change
+  the linker file, since for example on MSP430 FRAM devices the buffers are
+  allocated in the FRAM section that is allocated manually and not by IDE.
+*/
+  
+#ifndef CC3000_TINY_DRIVER
+  
+    #define CC3000_RX_BUFFER_SIZE   (CC3000_MAXIMAL_RX_SIZE)
+    #define CC3000_TX_BUFFER_SIZE   (CC3000_MAXIMAL_TX_SIZE)
+    #define    SP_PORTION_SIZE            512
+  
+//if defined TINY DRIVER we use smaller rx and tx buffer in order to minimize RAM consumption
+#else
+    #define CC3000_RX_BUFFER_SIZE   (TINY_CC3000_MAXIMAL_RX_SIZE)
+    #define CC3000_TX_BUFFER_SIZE   (TINY_CC3000_MAXIMAL_TX_SIZE)
+    #define    SP_PORTION_SIZE         32
+
+#endif  
+//*****************************************************************************
+//                  Compound Types
+//*****************************************************************************
+//typedef long time_t;
+//typedef unsigned long clock_t;
+//typedef long suseconds_t;
+
+typedef struct timeval timeval;
+
+struct timeval 
+{
+    long         tv_sec;                  /* seconds */
+    long         tv_usec;                 /* microseconds */
+};
+
+typedef char *(*tFWPatches)(unsigned long *usLength);
+
+typedef char *(*tDriverPatches)(unsigned long *usLength);
+
+typedef char *(*tBootLoaderPatches)(unsigned long *usLength);
+
+typedef void (*tWlanCB)(long event_type, char * data, unsigned char length );
+
+typedef long (*tWlanReadInteruptPin)(void);
+
+typedef void (*tWlanInterruptEnable)(void);
+
+typedef void (*tWlanInterruptDisable)(void);
+
+typedef void (*tWriteWlanPin)(unsigned char val);
+
+typedef struct
+{
+    unsigned short     usRxEventOpcode;
+    unsigned short     usEventOrDataReceived;
+    unsigned char     *pucReceivedData;
+    unsigned char     *pucTxCommandBuffer;
+
+    tFWPatches             sFWPatches;
+    tDriverPatches         sDriverPatches;
+    tBootLoaderPatches     sBootLoaderPatches;
+    tWlanCB                 sWlanCB;
+    tWlanReadInteruptPin  ReadWlanInterruptPin;
+    tWlanInterruptEnable  WlanInterruptEnable;
+    tWlanInterruptDisable WlanInterruptDisable;
+    tWriteWlanPin         WriteWlanPin;
+
+    signed long         slTransmitDataError;
+    unsigned short     usNumberOfFreeBuffers;
+    unsigned short     usSlBufferLength;
+    unsigned short     usBufferSize;
+    unsigned short     usRxDataPending;
+
+    unsigned long    NumberOfSentPackets;
+    unsigned long    NumberOfReleasedPackets;
+
+    unsigned char     InformHostOnTxComplete;
+}sSimplLinkInformation;
+
+extern volatile sSimplLinkInformation tSLInformation;
+
+
+//*****************************************************************************
+// Prototypes for the APIs.
+//*****************************************************************************
+
+
+
+//*****************************************************************************
+//
+//!  SimpleLinkWaitEvent
+//!
+//!  @param  usOpcode      command operation code
+//!  @param  pRetParams    command return parameters
+//!
+//!  @return               none
+//!
+//!  @brief                Wait for event, pass it to the hci_event_handler and
+//!                        update the event opcode in a global variable.
+//
+//*****************************************************************************
+
+extern void SimpleLinkWaitEvent(unsigned short usOpcode, void *pRetParams);
+
+//*****************************************************************************
+//
+//!  SimpleLinkWaitData
+//!
+//!  @param  pBuf       data buffer
+//!  @param  from       from information
+//!  @param  fromlen      from information length
+//!
+//!  @return               none
+//!
+//!  @brief                Wait for data, pass it to the hci_event_handler
+//!                        and update in a global variable that there is 
+//!                           data to read.
+//
+//*****************************************************************************
+
+extern void SimpleLinkWaitData(unsigned char *pBuf, unsigned char *from, unsigned char *fromlen);
+
+//*****************************************************************************
+//
+//!  UINT32_TO_STREAM_f
+//!
+//!  \param  p       pointer to the new stream
+//!  \param  u32     pointer to the 32 bit
+//!
+//!  \return               pointer to the new stream
+//!
+//!  \brief                This function is used for copying 32 bit to stream
+//!                           while converting to little endian format.
+//
+//*****************************************************************************
+
+extern unsigned char* UINT32_TO_STREAM_f (unsigned char *p, unsigned long u32);
+
+//*****************************************************************************
+//
+//!  UINT16_TO_STREAM_f
+//!
+//!  \param  p       pointer to the new stream
+//!  \param  u32     pointer to the 16 bit
+//!
+//!  \return               pointer to the new stream
+//!
+//!  \brief               This function is used for copying 16 bit to stream 
+//!                       while converting to little endian format.
+//
+//*****************************************************************************
+
+extern unsigned char* UINT16_TO_STREAM_f (unsigned char *p, unsigned short u16);
+
+//*****************************************************************************
+//
+//!  STREAM_TO_UINT16_f
+//!
+//!  \param  p          pointer to the stream
+//!  \param  offset     offset in the stream
+//!
+//!  \return               pointer to the new 16 bit
+//!
+//!  \brief               This function is used for copying received stream to 
+//!                       16 bit in little endian format.
+//
+//*****************************************************************************
+
+extern unsigned short STREAM_TO_UINT16_f(char* p, unsigned short offset);
+
+//*****************************************************************************
+//
+//!  STREAM_TO_UINT32_f
+//!
+//!  \param  p          pointer to the stream
+//!  \param  offset     offset in the stream
+//!
+//!  \return               pointer to the new 32 bit
+//!
+//!  \brief               This function is used for copying received stream to
+//!                       32 bit in little endian format.
+//
+//*****************************************************************************
+
+extern unsigned long STREAM_TO_UINT32_f(char* p, unsigned short offset);
+
+
+//*****************************************************************************
+//                    COMMON MACROs
+//*****************************************************************************
+
+
+//This macro is used for copying 8 bit to stream while converting to little endian format.
+#define UINT8_TO_STREAM(_p, _val)    {*(_p)++ = (_val);}
+//This macro is used for copying 16 bit to stream while converting to little endian format.
+#define UINT16_TO_STREAM(_p, _u16)    (UINT16_TO_STREAM_f(_p, _u16))
+//This macro is used for copying 32 bit to stream while converting to little endian format.
+#define UINT32_TO_STREAM(_p, _u32)    (UINT32_TO_STREAM_f(_p, _u32))
+//This macro is used for copying a specified value length bits (l) to stream while converting to little endian format.
+#define ARRAY_TO_STREAM(p, a, l)     {register short _i; for (_i = 0; _i < l; _i++) *(p)++ = ((unsigned char *) a)[_i];}
+//This macro is used for copying received stream to 8 bit in little endian format.
+#define STREAM_TO_UINT8(_p, _offset, _u8)    {_u8 = (unsigned char)(*(_p + _offset));}
+//This macro is used for copying received stream to 16 bit in little endian format.
+#define STREAM_TO_UINT16(_p, _offset, _u16)    {_u16 = STREAM_TO_UINT16_f(_p, _offset);}
+//This macro is used for copying received stream to 32 bit in little endian format.
+#define STREAM_TO_UINT32(_p, _offset, _u32)    {_u32 = STREAM_TO_UINT32_f(_p, _offset);}
+#define STREAM_TO_STREAM(p, a, l)     {register short _i; for (_i = 0; _i < l; _i++) *(a)++= ((unsigned char *) p)[_i];}
+
+
+
+
+//*****************************************************************************
+//
+// Mark the end of the C bindings section for C++ compilers.
+//
+//*****************************************************************************
+#ifdef  __cplusplus
+}
+#endif // __cplusplus
+
+#endif // __COMMON_H__
+