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):
# bytes | Description | Info |
1 | First time config parameter | Useful when connecting |
2 | Firmware updater version | used with the Firmware update tool |
2 | Service Pack version | used with the Firmware update tool |
3 | Driver Version | used with the Firmware update tool |
3 | Firmware Version | used with the Firmware update tool |
1 | CIK validation (Client Interface Key) | |
40 | CIK data (Client Interface Key) | used with the exosite |
Using the Library
A user API is needed to access the CC3000 functions.
Examples:
- Internet Of Things full WiGo demo (SmartConfig - WebServer - Exosite - Android sensor Fusion App)
- CC3000_Simple_Socket
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
CC3000_spi.cpp@2:f1d50c7f8bdb, 2013-07-08 (annotated)
- Committer:
- frankvnk
- Date:
- Mon Jul 08 13:18:12 2013 +0000
- Revision:
- 2:f1d50c7f8bdb
- Parent:
- 1:bbcaf0b2f367
- Child:
- 3:3818c9c7b14e
See history.h
Who changed what in which revision?
User | Revision | Line number | New contents of line |
---|---|---|---|
frankvnk | 0:c44f0314d6ec | 1 | /**************************************************************************** |
frankvnk | 0:c44f0314d6ec | 2 | * File : spi.c |
frankvnk | 0:c44f0314d6ec | 3 | * Date : 12/11/2012 (Menu "banner" reports actual build date) |
frankvnk | 0:c44f0314d6ec | 4 | * Purpose : Wi-Go SPI interface driver to CC3000 Wi-Fi module |
frankvnk | 0:c44f0314d6ec | 5 | * Author : Peter Fenn, Avnet Global Technical Marketing |
frankvnk | 0:c44f0314d6ec | 6 | * Description: SPI interface driver between Host MCU (KL25Z) and CC3000 |
frankvnk | 0:c44f0314d6ec | 7 | ***************************************************************************** |
frankvnk | 0:c44f0314d6ec | 8 | |
frankvnk | 0:c44f0314d6ec | 9 | ***************************************************************************** |
frankvnk | 0:c44f0314d6ec | 10 | * |
frankvnk | 0:c44f0314d6ec | 11 | * spi.c - CC3000 Host Driver Implementation. |
frankvnk | 0:c44f0314d6ec | 12 | * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/ |
frankvnk | 0:c44f0314d6ec | 13 | * |
frankvnk | 0:c44f0314d6ec | 14 | * Redistribution and use in source and binary forms, with or without |
frankvnk | 0:c44f0314d6ec | 15 | * modification, are permitted provided that the following conditions |
frankvnk | 0:c44f0314d6ec | 16 | * are met: |
frankvnk | 0:c44f0314d6ec | 17 | * |
frankvnk | 0:c44f0314d6ec | 18 | * Redistributions of source code must retain the above copyright |
frankvnk | 0:c44f0314d6ec | 19 | * notice, this list of conditions and the following disclaimer. |
frankvnk | 0:c44f0314d6ec | 20 | * |
frankvnk | 0:c44f0314d6ec | 21 | * Redistributions in binary form must reproduce the above copyright |
frankvnk | 0:c44f0314d6ec | 22 | * notice, this list of conditions and the following disclaimer in the |
frankvnk | 0:c44f0314d6ec | 23 | * documentation and/or other materials provided with the |
frankvnk | 0:c44f0314d6ec | 24 | * distribution. |
frankvnk | 0:c44f0314d6ec | 25 | * |
frankvnk | 0:c44f0314d6ec | 26 | * Neither the name of Texas Instruments Incorporated nor the names of |
frankvnk | 0:c44f0314d6ec | 27 | * its contributors may be used to endorse or promote products derived |
frankvnk | 0:c44f0314d6ec | 28 | * from this software without specific prior written permission. |
frankvnk | 0:c44f0314d6ec | 29 | * |
frankvnk | 0:c44f0314d6ec | 30 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
frankvnk | 0:c44f0314d6ec | 31 | * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
frankvnk | 0:c44f0314d6ec | 32 | * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
frankvnk | 0:c44f0314d6ec | 33 | * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
frankvnk | 0:c44f0314d6ec | 34 | * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
frankvnk | 0:c44f0314d6ec | 35 | * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
frankvnk | 0:c44f0314d6ec | 36 | * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
frankvnk | 0:c44f0314d6ec | 37 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
frankvnk | 0:c44f0314d6ec | 38 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
frankvnk | 0:c44f0314d6ec | 39 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
frankvnk | 0:c44f0314d6ec | 40 | * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
frankvnk | 0:c44f0314d6ec | 41 | * |
frankvnk | 0:c44f0314d6ec | 42 | *****************************************************************************/ |
frankvnk | 0:c44f0314d6ec | 43 | |
frankvnk | 0:c44f0314d6ec | 44 | //***************************************************************************** |
frankvnk | 0:c44f0314d6ec | 45 | // |
frankvnk | 0:c44f0314d6ec | 46 | //! \addtogroup link_buff_api |
frankvnk | 0:c44f0314d6ec | 47 | //! @{ |
frankvnk | 0:c44f0314d6ec | 48 | // |
frankvnk | 0:c44f0314d6ec | 49 | //***************************************************************************** |
frankvnk | 0:c44f0314d6ec | 50 | #include "CC3000_spi.h" |
frankvnk | 0:c44f0314d6ec | 51 | |
frankvnk | 0:c44f0314d6ec | 52 | tSpiInformation sSpiInformation; |
frankvnk | 0:c44f0314d6ec | 53 | |
frankvnk | 0:c44f0314d6ec | 54 | // Static buffer for 5 bytes of SPI HEADER |
frankvnk | 0:c44f0314d6ec | 55 | unsigned char tSpiReadHeader[] = {READ, 0, 0, 0, 0}; |
frankvnk | 0:c44f0314d6ec | 56 | |
frankvnk | 0:c44f0314d6ec | 57 | //TX and RX buffers |
frankvnk | 0:c44f0314d6ec | 58 | char spi_buffer[CC3000_RX_BUFFER_SIZE]; |
frankvnk | 0:c44f0314d6ec | 59 | unsigned char wlan_tx_buffer[CC3000_TX_BUFFER_SIZE]; |
frankvnk | 0:c44f0314d6ec | 60 | |
frankvnk | 0:c44f0314d6ec | 61 | //***************************************************************************** |
frankvnk | 0:c44f0314d6ec | 62 | // |
frankvnk | 0:c44f0314d6ec | 63 | //! SpiClose |
frankvnk | 0:c44f0314d6ec | 64 | //! |
frankvnk | 0:c44f0314d6ec | 65 | //! \param none |
frankvnk | 0:c44f0314d6ec | 66 | //! |
frankvnk | 0:c44f0314d6ec | 67 | //! \return none |
frankvnk | 0:c44f0314d6ec | 68 | //! |
frankvnk | 1:bbcaf0b2f367 | 69 | //! \brief Close the SPI interface |
frankvnk | 0:c44f0314d6ec | 70 | // |
frankvnk | 0:c44f0314d6ec | 71 | //***************************************************************************** |
frankvnk | 0:c44f0314d6ec | 72 | void SpiClose(void) |
frankvnk | 0:c44f0314d6ec | 73 | { |
frankvnk | 0:c44f0314d6ec | 74 | if (sSpiInformation.pRxPacket) |
frankvnk | 0:c44f0314d6ec | 75 | { |
frankvnk | 0:c44f0314d6ec | 76 | sSpiInformation.pRxPacket = 0; |
frankvnk | 0:c44f0314d6ec | 77 | } |
frankvnk | 0:c44f0314d6ec | 78 | tSLInformation.WlanInterruptDisable(); |
frankvnk | 0:c44f0314d6ec | 79 | } |
frankvnk | 0:c44f0314d6ec | 80 | |
frankvnk | 0:c44f0314d6ec | 81 | //***************************************************************************** |
frankvnk | 0:c44f0314d6ec | 82 | // |
frankvnk | 1:bbcaf0b2f367 | 83 | //! SpiOpen |
frankvnk | 0:c44f0314d6ec | 84 | //! |
frankvnk | 1:bbcaf0b2f367 | 85 | //! \param pointer to RX handle |
frankvnk | 0:c44f0314d6ec | 86 | //! |
frankvnk | 0:c44f0314d6ec | 87 | //! \return none |
frankvnk | 0:c44f0314d6ec | 88 | //! |
frankvnk | 1:bbcaf0b2f367 | 89 | //! \brief Open the SPI interface |
frankvnk | 0:c44f0314d6ec | 90 | // |
frankvnk | 0:c44f0314d6ec | 91 | //***************************************************************************** |
frankvnk | 0:c44f0314d6ec | 92 | void SpiOpen(gcSpiHandleRx pfRxHandler) |
frankvnk | 0:c44f0314d6ec | 93 | { |
frankvnk | 0:c44f0314d6ec | 94 | sSpiInformation.ulSpiState = eSPI_STATE_POWERUP; |
frankvnk | 0:c44f0314d6ec | 95 | |
frankvnk | 0:c44f0314d6ec | 96 | sSpiInformation.SPIRxHandler = pfRxHandler; |
frankvnk | 0:c44f0314d6ec | 97 | sSpiInformation.usTxPacketLength = 0; |
frankvnk | 0:c44f0314d6ec | 98 | sSpiInformation.pTxPacket = NULL; |
frankvnk | 0:c44f0314d6ec | 99 | sSpiInformation.pRxPacket = (unsigned char *)spi_buffer; |
frankvnk | 0:c44f0314d6ec | 100 | sSpiInformation.usRxPacketLength = 0; |
frankvnk | 0:c44f0314d6ec | 101 | spi_buffer[CC3000_RX_BUFFER_SIZE - 1] = CC3000_BUFFER_MAGIC_NUMBER; |
frankvnk | 0:c44f0314d6ec | 102 | wlan_tx_buffer[CC3000_TX_BUFFER_SIZE - 1] = CC3000_BUFFER_MAGIC_NUMBER; |
frankvnk | 0:c44f0314d6ec | 103 | tSLInformation.WlanInterruptEnable(); |
frankvnk | 0:c44f0314d6ec | 104 | } |
frankvnk | 0:c44f0314d6ec | 105 | |
frankvnk | 0:c44f0314d6ec | 106 | //***************************************************************************** |
frankvnk | 0:c44f0314d6ec | 107 | // |
frankvnk | 1:bbcaf0b2f367 | 108 | //! First SPI write after powerup (delay needed between SPI header and body) |
frankvnk | 0:c44f0314d6ec | 109 | //! |
frankvnk | 1:bbcaf0b2f367 | 110 | //! \param pointer to write buffer |
frankvnk | 1:bbcaf0b2f367 | 111 | //! \param buffer length |
frankvnk | 0:c44f0314d6ec | 112 | //! |
frankvnk | 0:c44f0314d6ec | 113 | //! \return none |
frankvnk | 0:c44f0314d6ec | 114 | //! |
frankvnk | 0:c44f0314d6ec | 115 | //! \brief ... |
frankvnk | 0:c44f0314d6ec | 116 | // |
frankvnk | 0:c44f0314d6ec | 117 | //***************************************************************************** |
frankvnk | 0:c44f0314d6ec | 118 | long SpiFirstWrite(unsigned char *ucBuf, unsigned short usLength) |
frankvnk | 0:c44f0314d6ec | 119 | { |
frankvnk | 1:bbcaf0b2f367 | 120 | wlan_cs = 0; |
frankvnk | 0:c44f0314d6ec | 121 | wait_us(50); |
frankvnk | 0:c44f0314d6ec | 122 | |
frankvnk | 0:c44f0314d6ec | 123 | // SPI writes first 4 bytes of data |
frankvnk | 0:c44f0314d6ec | 124 | SpiWriteDataSynchronous(ucBuf, 4); |
frankvnk | 0:c44f0314d6ec | 125 | wait_us(50); |
frankvnk | 0:c44f0314d6ec | 126 | |
frankvnk | 0:c44f0314d6ec | 127 | SpiWriteDataSynchronous(ucBuf + 4, usLength - 4); |
frankvnk | 0:c44f0314d6ec | 128 | |
frankvnk | 0:c44f0314d6ec | 129 | // From this point on - operate in a regular way |
frankvnk | 0:c44f0314d6ec | 130 | sSpiInformation.ulSpiState = eSPI_STATE_IDLE; |
frankvnk | 0:c44f0314d6ec | 131 | |
frankvnk | 1:bbcaf0b2f367 | 132 | wlan_cs = 1; |
frankvnk | 0:c44f0314d6ec | 133 | |
frankvnk | 0:c44f0314d6ec | 134 | return(0); |
frankvnk | 0:c44f0314d6ec | 135 | } |
frankvnk | 0:c44f0314d6ec | 136 | |
frankvnk | 0:c44f0314d6ec | 137 | //***************************************************************************** |
frankvnk | 0:c44f0314d6ec | 138 | // |
frankvnk | 1:bbcaf0b2f367 | 139 | //! SPI Write function |
frankvnk | 0:c44f0314d6ec | 140 | //! |
frankvnk | 1:bbcaf0b2f367 | 141 | //! \param pointer to write buffer |
frankvnk | 1:bbcaf0b2f367 | 142 | //! \param buffer length |
frankvnk | 0:c44f0314d6ec | 143 | //! |
frankvnk | 1:bbcaf0b2f367 | 144 | //! \return 0 |
frankvnk | 0:c44f0314d6ec | 145 | //! |
frankvnk | 0:c44f0314d6ec | 146 | //! \brief ... |
frankvnk | 0:c44f0314d6ec | 147 | // |
frankvnk | 0:c44f0314d6ec | 148 | //***************************************************************************** |
frankvnk | 0:c44f0314d6ec | 149 | long SpiWrite(unsigned char *pUserBuffer, unsigned short usLength) |
frankvnk | 0:c44f0314d6ec | 150 | { |
frankvnk | 0:c44f0314d6ec | 151 | unsigned char ucPad = 0; |
frankvnk | 0:c44f0314d6ec | 152 | // |
frankvnk | 0:c44f0314d6ec | 153 | // Figure out the total length of the packet in order to figure out if there is padding or not |
frankvnk | 0:c44f0314d6ec | 154 | // |
frankvnk | 0:c44f0314d6ec | 155 | if(!(usLength & 0x0001)) |
frankvnk | 0:c44f0314d6ec | 156 | { |
frankvnk | 0:c44f0314d6ec | 157 | ucPad++; |
frankvnk | 0:c44f0314d6ec | 158 | } |
frankvnk | 0:c44f0314d6ec | 159 | |
frankvnk | 0:c44f0314d6ec | 160 | pUserBuffer[0] = WRITE; |
frankvnk | 0:c44f0314d6ec | 161 | pUserBuffer[1] = HI(usLength + ucPad); |
frankvnk | 0:c44f0314d6ec | 162 | pUserBuffer[2] = LO(usLength + ucPad); |
frankvnk | 0:c44f0314d6ec | 163 | pUserBuffer[3] = 0; |
frankvnk | 0:c44f0314d6ec | 164 | pUserBuffer[4] = 0; |
frankvnk | 0:c44f0314d6ec | 165 | |
frankvnk | 0:c44f0314d6ec | 166 | usLength += (SPI_HEADER_SIZE + ucPad); |
frankvnk | 0:c44f0314d6ec | 167 | |
frankvnk | 1:bbcaf0b2f367 | 168 | // The magic number resides at the end of the TX/RX buffer (1 byte after the allocated size) |
frankvnk | 1:bbcaf0b2f367 | 169 | // If the magic number is overwitten - buffer overrun occurred - we will be stuck here forever! |
frankvnk | 0:c44f0314d6ec | 170 | if (wlan_tx_buffer[CC3000_TX_BUFFER_SIZE - 1] != CC3000_BUFFER_MAGIC_NUMBER) |
frankvnk | 0:c44f0314d6ec | 171 | { |
frankvnk | 0:c44f0314d6ec | 172 | printf("\nERROR: TX Buffer Overrun\n"); |
frankvnk | 0:c44f0314d6ec | 173 | while (1); |
frankvnk | 0:c44f0314d6ec | 174 | } |
frankvnk | 0:c44f0314d6ec | 175 | |
frankvnk | 0:c44f0314d6ec | 176 | if (sSpiInformation.ulSpiState == eSPI_STATE_POWERUP) |
frankvnk | 0:c44f0314d6ec | 177 | { |
frankvnk | 0:c44f0314d6ec | 178 | while (sSpiInformation.ulSpiState != eSPI_STATE_INITIALIZED); |
frankvnk | 0:c44f0314d6ec | 179 | } |
frankvnk | 0:c44f0314d6ec | 180 | |
frankvnk | 0:c44f0314d6ec | 181 | if (sSpiInformation.ulSpiState == eSPI_STATE_INITIALIZED) |
frankvnk | 0:c44f0314d6ec | 182 | { |
frankvnk | 1:bbcaf0b2f367 | 183 | // TX/RX transaction over SPI after powerup: IRQ is low - send read buffer size command |
frankvnk | 0:c44f0314d6ec | 184 | SpiFirstWrite(pUserBuffer, usLength); |
frankvnk | 0:c44f0314d6ec | 185 | } |
frankvnk | 0:c44f0314d6ec | 186 | else |
frankvnk | 0:c44f0314d6ec | 187 | { |
frankvnk | 1:bbcaf0b2f367 | 188 | |
frankvnk | 2:f1d50c7f8bdb | 189 | //printf("Write\n"); |
frankvnk | 0:c44f0314d6ec | 190 | // We need to prevent here race that can occur in case 2 back to back packets are sent to the |
frankvnk | 0:c44f0314d6ec | 191 | // device, so the state will move to IDLE and once again to not IDLE due to IRQ |
frankvnk | 0:c44f0314d6ec | 192 | tSLInformation.WlanInterruptDisable(); |
frankvnk | 0:c44f0314d6ec | 193 | |
frankvnk | 0:c44f0314d6ec | 194 | while (sSpiInformation.ulSpiState != eSPI_STATE_IDLE); |
frankvnk | 0:c44f0314d6ec | 195 | |
frankvnk | 0:c44f0314d6ec | 196 | sSpiInformation.ulSpiState = eSPI_STATE_WRITE_IRQ; |
frankvnk | 0:c44f0314d6ec | 197 | sSpiInformation.pTxPacket = pUserBuffer; |
frankvnk | 0:c44f0314d6ec | 198 | sSpiInformation.usTxPacketLength = usLength; |
frankvnk | 0:c44f0314d6ec | 199 | |
frankvnk | 1:bbcaf0b2f367 | 200 | // Assert the CS line and wait until the IRQ line is active, then initialize the write operation |
frankvnk | 1:bbcaf0b2f367 | 201 | wlan_cs = 0; |
frankvnk | 1:bbcaf0b2f367 | 202 | |
frankvnk | 1:bbcaf0b2f367 | 203 | tSLInformation.WlanInterruptEnable(); |
frankvnk | 0:c44f0314d6ec | 204 | |
frankvnk | 2:f1d50c7f8bdb | 205 | // check for a missing interrupt between the CS assertion and interrupt enable |
frankvnk | 2:f1d50c7f8bdb | 206 | if (tSLInformation.ReadWlanInterruptPin() == 0) |
frankvnk | 1:bbcaf0b2f367 | 207 | { |
frankvnk | 2:f1d50c7f8bdb | 208 | //printf("INT missed\n"); |
frankvnk | 1:bbcaf0b2f367 | 209 | SpiWriteDataSynchronous(sSpiInformation.pTxPacket, sSpiInformation.usTxPacketLength); |
frankvnk | 1:bbcaf0b2f367 | 210 | sSpiInformation.ulSpiState = eSPI_STATE_IDLE; |
frankvnk | 1:bbcaf0b2f367 | 211 | wlan_cs = 1; |
frankvnk | 2:f1d50c7f8bdb | 212 | } |
frankvnk | 0:c44f0314d6ec | 213 | } |
frankvnk | 0:c44f0314d6ec | 214 | |
frankvnk | 1:bbcaf0b2f367 | 215 | // Due to the fact that we are currently implementing a blocking situation, wait until the transaction ends |
frankvnk | 0:c44f0314d6ec | 216 | |
frankvnk | 1:bbcaf0b2f367 | 217 | while (sSpiInformation.ulSpiState != eSPI_STATE_IDLE); |
frankvnk | 0:c44f0314d6ec | 218 | |
frankvnk | 0:c44f0314d6ec | 219 | return(0); |
frankvnk | 0:c44f0314d6ec | 220 | } |
frankvnk | 0:c44f0314d6ec | 221 | |
frankvnk | 0:c44f0314d6ec | 222 | |
frankvnk | 0:c44f0314d6ec | 223 | |
frankvnk | 0:c44f0314d6ec | 224 | |
frankvnk | 0:c44f0314d6ec | 225 | //***************************************************************************** |
frankvnk | 0:c44f0314d6ec | 226 | // |
frankvnk | 1:bbcaf0b2f367 | 227 | //! Low level SPI write |
frankvnk | 0:c44f0314d6ec | 228 | //! |
frankvnk | 1:bbcaf0b2f367 | 229 | //! \param pointer to data buffer |
frankvnk | 1:bbcaf0b2f367 | 230 | //! \param number of bytes |
frankvnk | 0:c44f0314d6ec | 231 | //! |
frankvnk | 0:c44f0314d6ec | 232 | //! \return none |
frankvnk | 0:c44f0314d6ec | 233 | //! |
frankvnk | 0:c44f0314d6ec | 234 | //! \brief ... |
frankvnk | 0:c44f0314d6ec | 235 | // |
frankvnk | 0:c44f0314d6ec | 236 | //***************************************************************************** |
frankvnk | 0:c44f0314d6ec | 237 | void SpiWriteDataSynchronous(unsigned char *data, unsigned short size) |
frankvnk | 0:c44f0314d6ec | 238 | { |
frankvnk | 2:f1d50c7f8bdb | 239 | //printf("W %02i : ",size); |
frankvnk | 2:f1d50c7f8bdb | 240 | for (; size > 0 ; size--) |
frankvnk | 0:c44f0314d6ec | 241 | { |
frankvnk | 2:f1d50c7f8bdb | 242 | //printf("%02X ",*data); |
frankvnk | 2:f1d50c7f8bdb | 243 | wlan.write(*data++); |
frankvnk | 0:c44f0314d6ec | 244 | } |
frankvnk | 2:f1d50c7f8bdb | 245 | //printf("\n"); |
frankvnk | 0:c44f0314d6ec | 246 | } |
frankvnk | 0:c44f0314d6ec | 247 | |
frankvnk | 0:c44f0314d6ec | 248 | //***************************************************************************** |
frankvnk | 0:c44f0314d6ec | 249 | // |
frankvnk | 1:bbcaf0b2f367 | 250 | //! Low level SPI read |
frankvnk | 0:c44f0314d6ec | 251 | //! |
frankvnk | 1:bbcaf0b2f367 | 252 | //! \param pointer to data buffer |
frankvnk | 1:bbcaf0b2f367 | 253 | //! \param number of bytes |
frankvnk | 0:c44f0314d6ec | 254 | //! |
frankvnk | 0:c44f0314d6ec | 255 | //! \return none |
frankvnk | 0:c44f0314d6ec | 256 | //! |
frankvnk | 0:c44f0314d6ec | 257 | //! \brief ... |
frankvnk | 0:c44f0314d6ec | 258 | // |
frankvnk | 0:c44f0314d6ec | 259 | //***************************************************************************** |
frankvnk | 0:c44f0314d6ec | 260 | void SpiReadDataSynchronous(unsigned char *data, unsigned short size) |
frankvnk | 0:c44f0314d6ec | 261 | { |
frankvnk | 0:c44f0314d6ec | 262 | long i = 0; |
frankvnk | 2:f1d50c7f8bdb | 263 | //printf("R %02i : ",size); |
frankvnk | 2:f1d50c7f8bdb | 264 | for (i = 0; i < size; i++) |
frankvnk | 0:c44f0314d6ec | 265 | { |
frankvnk | 1:bbcaf0b2f367 | 266 | data[i] = wlan.write(READ); |
frankvnk | 2:f1d50c7f8bdb | 267 | //printf("%02X ",data[i]); |
frankvnk | 0:c44f0314d6ec | 268 | } |
frankvnk | 2:f1d50c7f8bdb | 269 | //printf("\n"); |
frankvnk | 0:c44f0314d6ec | 270 | } |
frankvnk | 0:c44f0314d6ec | 271 | |
frankvnk | 0:c44f0314d6ec | 272 | //***************************************************************************** |
frankvnk | 0:c44f0314d6ec | 273 | // |
frankvnk | 1:bbcaf0b2f367 | 274 | //! Read 5 SPI header bytes and 5 Event Data bytes |
frankvnk | 0:c44f0314d6ec | 275 | //! |
frankvnk | 1:bbcaf0b2f367 | 276 | //! \param none |
frankvnk | 0:c44f0314d6ec | 277 | //! |
frankvnk | 0:c44f0314d6ec | 278 | //! \return none |
frankvnk | 0:c44f0314d6ec | 279 | //! |
frankvnk | 0:c44f0314d6ec | 280 | //! \brief ... |
frankvnk | 0:c44f0314d6ec | 281 | // |
frankvnk | 0:c44f0314d6ec | 282 | //***************************************************************************** |
frankvnk | 0:c44f0314d6ec | 283 | void SpiReadHeader(void) |
frankvnk | 0:c44f0314d6ec | 284 | { |
frankvnk | 0:c44f0314d6ec | 285 | SpiReadDataSynchronous(sSpiInformation.pRxPacket, 10); |
frankvnk | 0:c44f0314d6ec | 286 | } |
frankvnk | 0:c44f0314d6ec | 287 | |
frankvnk | 0:c44f0314d6ec | 288 | |
frankvnk | 0:c44f0314d6ec | 289 | //***************************************************************************** |
frankvnk | 0:c44f0314d6ec | 290 | // |
frankvnk | 1:bbcaf0b2f367 | 291 | //! Process the received SPI Header and in accordance with it - continue reading the packet |
frankvnk | 0:c44f0314d6ec | 292 | //! |
frankvnk | 0:c44f0314d6ec | 293 | //! \param None |
frankvnk | 0:c44f0314d6ec | 294 | //! |
frankvnk | 1:bbcaf0b2f367 | 295 | //! \return 0 |
frankvnk | 0:c44f0314d6ec | 296 | //! |
frankvnk | 0:c44f0314d6ec | 297 | //! \brief ... |
frankvnk | 0:c44f0314d6ec | 298 | // |
frankvnk | 0:c44f0314d6ec | 299 | //***************************************************************************** |
frankvnk | 0:c44f0314d6ec | 300 | long SpiReadDataCont(void) |
frankvnk | 0:c44f0314d6ec | 301 | { |
frankvnk | 0:c44f0314d6ec | 302 | long data_to_recv; |
frankvnk | 0:c44f0314d6ec | 303 | unsigned char *evnt_buff, type; |
frankvnk | 0:c44f0314d6ec | 304 | |
frankvnk | 0:c44f0314d6ec | 305 | // |
frankvnk | 0:c44f0314d6ec | 306 | //determine what type of packet we have |
frankvnk | 0:c44f0314d6ec | 307 | // |
frankvnk | 0:c44f0314d6ec | 308 | evnt_buff = sSpiInformation.pRxPacket; |
frankvnk | 0:c44f0314d6ec | 309 | data_to_recv = 0; |
frankvnk | 0:c44f0314d6ec | 310 | STREAM_TO_UINT8((char *)(evnt_buff + SPI_HEADER_SIZE), HCI_PACKET_TYPE_OFFSET, type); |
frankvnk | 0:c44f0314d6ec | 311 | |
frankvnk | 0:c44f0314d6ec | 312 | switch(type) |
frankvnk | 0:c44f0314d6ec | 313 | { |
frankvnk | 0:c44f0314d6ec | 314 | case HCI_TYPE_DATA: |
frankvnk | 0:c44f0314d6ec | 315 | { |
frankvnk | 1:bbcaf0b2f367 | 316 | // Read the remaining data.. |
frankvnk | 0:c44f0314d6ec | 317 | STREAM_TO_UINT16((char *)(evnt_buff + SPI_HEADER_SIZE), HCI_DATA_LENGTH_OFFSET, data_to_recv); |
frankvnk | 0:c44f0314d6ec | 318 | if (!((HEADERS_SIZE_EVNT + data_to_recv) & 1)) |
frankvnk | 0:c44f0314d6ec | 319 | { |
frankvnk | 0:c44f0314d6ec | 320 | data_to_recv++; |
frankvnk | 0:c44f0314d6ec | 321 | } |
frankvnk | 0:c44f0314d6ec | 322 | |
frankvnk | 0:c44f0314d6ec | 323 | if (data_to_recv) |
frankvnk | 0:c44f0314d6ec | 324 | { |
frankvnk | 0:c44f0314d6ec | 325 | SpiReadDataSynchronous(evnt_buff + 10, data_to_recv); |
frankvnk | 0:c44f0314d6ec | 326 | } |
frankvnk | 0:c44f0314d6ec | 327 | break; |
frankvnk | 0:c44f0314d6ec | 328 | } |
frankvnk | 0:c44f0314d6ec | 329 | case HCI_TYPE_EVNT: |
frankvnk | 0:c44f0314d6ec | 330 | { |
frankvnk | 0:c44f0314d6ec | 331 | // |
frankvnk | 0:c44f0314d6ec | 332 | // Calculate the rest length of the data |
frankvnk | 0:c44f0314d6ec | 333 | // |
frankvnk | 0:c44f0314d6ec | 334 | STREAM_TO_UINT8((char *)(evnt_buff + SPI_HEADER_SIZE), HCI_EVENT_LENGTH_OFFSET, data_to_recv); |
frankvnk | 0:c44f0314d6ec | 335 | data_to_recv -= 1; |
frankvnk | 0:c44f0314d6ec | 336 | |
frankvnk | 0:c44f0314d6ec | 337 | // |
frankvnk | 0:c44f0314d6ec | 338 | // Add padding byte if needed |
frankvnk | 0:c44f0314d6ec | 339 | // |
frankvnk | 0:c44f0314d6ec | 340 | if ((HEADERS_SIZE_EVNT + data_to_recv) & 1) |
frankvnk | 0:c44f0314d6ec | 341 | { |
frankvnk | 0:c44f0314d6ec | 342 | |
frankvnk | 0:c44f0314d6ec | 343 | data_to_recv++; |
frankvnk | 0:c44f0314d6ec | 344 | } |
frankvnk | 0:c44f0314d6ec | 345 | |
frankvnk | 0:c44f0314d6ec | 346 | if (data_to_recv) |
frankvnk | 0:c44f0314d6ec | 347 | { |
frankvnk | 0:c44f0314d6ec | 348 | SpiReadDataSynchronous(evnt_buff + 10, data_to_recv); |
frankvnk | 0:c44f0314d6ec | 349 | } |
frankvnk | 0:c44f0314d6ec | 350 | |
frankvnk | 0:c44f0314d6ec | 351 | sSpiInformation.ulSpiState = eSPI_STATE_READ_EOT; |
frankvnk | 0:c44f0314d6ec | 352 | break; |
frankvnk | 0:c44f0314d6ec | 353 | } |
frankvnk | 0:c44f0314d6ec | 354 | } |
frankvnk | 0:c44f0314d6ec | 355 | |
frankvnk | 0:c44f0314d6ec | 356 | return (0); |
frankvnk | 0:c44f0314d6ec | 357 | } |
frankvnk | 0:c44f0314d6ec | 358 | |
frankvnk | 0:c44f0314d6ec | 359 | |
frankvnk | 0:c44f0314d6ec | 360 | //***************************************************************************** |
frankvnk | 0:c44f0314d6ec | 361 | // |
frankvnk | 1:bbcaf0b2f367 | 362 | //! Pause SPI IRQ handling |
frankvnk | 0:c44f0314d6ec | 363 | //! |
frankvnk | 1:bbcaf0b2f367 | 364 | //! \param none |
frankvnk | 0:c44f0314d6ec | 365 | //! |
frankvnk | 0:c44f0314d6ec | 366 | //! \return none |
frankvnk | 0:c44f0314d6ec | 367 | //! |
frankvnk | 1:bbcaf0b2f367 | 368 | //! \brief ... |
frankvnk | 0:c44f0314d6ec | 369 | // |
frankvnk | 0:c44f0314d6ec | 370 | //***************************************************************************** |
frankvnk | 0:c44f0314d6ec | 371 | void SpiPauseSpi(void) |
frankvnk | 0:c44f0314d6ec | 372 | { |
frankvnk | 0:c44f0314d6ec | 373 | tSLInformation.WlanInterruptDisable(); |
frankvnk | 0:c44f0314d6ec | 374 | } |
frankvnk | 0:c44f0314d6ec | 375 | |
frankvnk | 0:c44f0314d6ec | 376 | |
frankvnk | 0:c44f0314d6ec | 377 | //***************************************************************************** |
frankvnk | 0:c44f0314d6ec | 378 | // |
frankvnk | 1:bbcaf0b2f367 | 379 | //! Resume SPI IRQ handling |
frankvnk | 0:c44f0314d6ec | 380 | //! |
frankvnk | 1:bbcaf0b2f367 | 381 | //! \param none |
frankvnk | 0:c44f0314d6ec | 382 | //! |
frankvnk | 0:c44f0314d6ec | 383 | //! \return none |
frankvnk | 0:c44f0314d6ec | 384 | //! |
frankvnk | 1:bbcaf0b2f367 | 385 | //! \brief ..... |
frankvnk | 0:c44f0314d6ec | 386 | // |
frankvnk | 0:c44f0314d6ec | 387 | //***************************************************************************** |
frankvnk | 0:c44f0314d6ec | 388 | void SpiResumeSpi(void) |
frankvnk | 0:c44f0314d6ec | 389 | { |
frankvnk | 0:c44f0314d6ec | 390 | tSLInformation.WlanInterruptEnable(); |
frankvnk | 0:c44f0314d6ec | 391 | } |
frankvnk | 0:c44f0314d6ec | 392 | |
frankvnk | 0:c44f0314d6ec | 393 | //***************************************************************************** |
frankvnk | 0:c44f0314d6ec | 394 | // |
frankvnk | 1:bbcaf0b2f367 | 395 | //! Trigger RX processing |
frankvnk | 0:c44f0314d6ec | 396 | //! |
frankvnk | 0:c44f0314d6ec | 397 | //! \param SpiTriggerRxProcessing |
frankvnk | 0:c44f0314d6ec | 398 | //! |
frankvnk | 0:c44f0314d6ec | 399 | //! \return none |
frankvnk | 0:c44f0314d6ec | 400 | //! |
frankvnk | 0:c44f0314d6ec | 401 | //! \brief The function triggers a user provided callback for |
frankvnk | 0:c44f0314d6ec | 402 | // |
frankvnk | 0:c44f0314d6ec | 403 | //***************************************************************************** |
frankvnk | 0:c44f0314d6ec | 404 | void SpiTriggerRxProcessing(void) |
frankvnk | 0:c44f0314d6ec | 405 | { |
frankvnk | 0:c44f0314d6ec | 406 | // |
frankvnk | 0:c44f0314d6ec | 407 | // Trigger Rx processing |
frankvnk | 0:c44f0314d6ec | 408 | // |
frankvnk | 0:c44f0314d6ec | 409 | SpiPauseSpi(); |
frankvnk | 1:bbcaf0b2f367 | 410 | wlan_cs = 1; |
frankvnk | 0:c44f0314d6ec | 411 | |
frankvnk | 1:bbcaf0b2f367 | 412 | // The magic number resides at the end of the TX/RX buffer (1 byte after the allocated size) |
frankvnk | 1:bbcaf0b2f367 | 413 | // If the magic number is overwitten - buffer overrun occurred - we will be stuck here forever! |
frankvnk | 0:c44f0314d6ec | 414 | if (sSpiInformation.pRxPacket[CC3000_RX_BUFFER_SIZE - 1] != CC3000_BUFFER_MAGIC_NUMBER) |
frankvnk | 0:c44f0314d6ec | 415 | { |
frankvnk | 0:c44f0314d6ec | 416 | printf("\nERROR: RX Buffer Overrun\n"); |
frankvnk | 0:c44f0314d6ec | 417 | while (1); |
frankvnk | 0:c44f0314d6ec | 418 | } |
frankvnk | 0:c44f0314d6ec | 419 | |
frankvnk | 0:c44f0314d6ec | 420 | sSpiInformation.ulSpiState = eSPI_STATE_IDLE; |
frankvnk | 0:c44f0314d6ec | 421 | sSpiInformation.SPIRxHandler(sSpiInformation.pRxPacket + SPI_HEADER_SIZE); |
frankvnk | 0:c44f0314d6ec | 422 | } |
frankvnk | 0:c44f0314d6ec | 423 | |
frankvnk | 0:c44f0314d6ec | 424 | //***************************************************************************** |
frankvnk | 0:c44f0314d6ec | 425 | // |
frankvnk | 1:bbcaf0b2f367 | 426 | //! SPI interrupt Handler |
frankvnk | 0:c44f0314d6ec | 427 | //! |
frankvnk | 0:c44f0314d6ec | 428 | //! \param none |
frankvnk | 0:c44f0314d6ec | 429 | //! |
frankvnk | 0:c44f0314d6ec | 430 | //! \return none |
frankvnk | 0:c44f0314d6ec | 431 | //! |
frankvnk | 1:bbcaf0b2f367 | 432 | //! \brief GPIO A interrupt handler. When the external WLAN device is |
frankvnk | 0:c44f0314d6ec | 433 | //! ready to interact with Host CPU it generates an interrupt signal. |
frankvnk | 1:bbcaf0b2f367 | 434 | //! The host CPU asserts CS to acknowledge the IRQ |
frankvnk | 0:c44f0314d6ec | 435 | // |
frankvnk | 0:c44f0314d6ec | 436 | //***************************************************************************** |
frankvnk | 0:c44f0314d6ec | 437 | void WLAN_IRQHandler(void) |
frankvnk | 0:c44f0314d6ec | 438 | { |
frankvnk | 0:c44f0314d6ec | 439 | // Clear pending interrupt |
frankvnk | 2:f1d50c7f8bdb | 440 | // NVIC_ClearPendingIRQ(PORTA_IRQn); |
frankvnk | 2:f1d50c7f8bdb | 441 | // WLAN_ISF_PCR |= PORT_PCR_ISF_MASK; |
frankvnk | 2:f1d50c7f8bdb | 442 | // WLAN_ISF_ISFR |= WLAN_ISF_MASK; |
frankvnk | 2:f1d50c7f8bdb | 443 | //printf("IRQ\n"); |
frankvnk | 0:c44f0314d6ec | 444 | if (sSpiInformation.ulSpiState == eSPI_STATE_POWERUP) |
frankvnk | 0:c44f0314d6ec | 445 | { |
frankvnk | 1:bbcaf0b2f367 | 446 | // Inform HCI Layer that IRQ occured after powerup |
frankvnk | 0:c44f0314d6ec | 447 | sSpiInformation.ulSpiState = eSPI_STATE_INITIALIZED; |
frankvnk | 0:c44f0314d6ec | 448 | } |
frankvnk | 0:c44f0314d6ec | 449 | else if (sSpiInformation.ulSpiState == eSPI_STATE_IDLE) |
frankvnk | 0:c44f0314d6ec | 450 | { |
frankvnk | 0:c44f0314d6ec | 451 | sSpiInformation.ulSpiState = eSPI_STATE_READ_IRQ; |
frankvnk | 1:bbcaf0b2f367 | 452 | /* IRQ line goes low - acknowledge it */ |
frankvnk | 1:bbcaf0b2f367 | 453 | wlan_cs = 0; |
frankvnk | 0:c44f0314d6ec | 454 | SpiReadHeader(); |
frankvnk | 0:c44f0314d6ec | 455 | sSpiInformation.ulSpiState = eSPI_STATE_READ_EOT; |
frankvnk | 0:c44f0314d6ec | 456 | SSIContReadOperation(); |
frankvnk | 0:c44f0314d6ec | 457 | } |
frankvnk | 0:c44f0314d6ec | 458 | else if (sSpiInformation.ulSpiState == eSPI_STATE_WRITE_IRQ) |
frankvnk | 0:c44f0314d6ec | 459 | { |
frankvnk | 0:c44f0314d6ec | 460 | SpiWriteDataSynchronous(sSpiInformation.pTxPacket, sSpiInformation.usTxPacketLength); |
frankvnk | 0:c44f0314d6ec | 461 | sSpiInformation.ulSpiState = eSPI_STATE_IDLE; |
frankvnk | 1:bbcaf0b2f367 | 462 | wlan_cs = 1; |
frankvnk | 0:c44f0314d6ec | 463 | } |
frankvnk | 0:c44f0314d6ec | 464 | } |
frankvnk | 0:c44f0314d6ec | 465 | |
frankvnk | 0:c44f0314d6ec | 466 | //***************************************************************************** |
frankvnk | 0:c44f0314d6ec | 467 | // |
frankvnk | 1:bbcaf0b2f367 | 468 | //! SSIContReadOperation |
frankvnk | 0:c44f0314d6ec | 469 | //! |
frankvnk | 1:bbcaf0b2f367 | 470 | //! \param none |
frankvnk | 0:c44f0314d6ec | 471 | //! |
frankvnk | 0:c44f0314d6ec | 472 | //! \return none |
frankvnk | 0:c44f0314d6ec | 473 | //! |
frankvnk | 1:bbcaf0b2f367 | 474 | //! \brief .... |
frankvnk | 0:c44f0314d6ec | 475 | // |
frankvnk | 0:c44f0314d6ec | 476 | //***************************************************************************** |
frankvnk | 0:c44f0314d6ec | 477 | void SSIContReadOperation(void) |
frankvnk | 0:c44f0314d6ec | 478 | { |
frankvnk | 1:bbcaf0b2f367 | 479 | // The header was read - continue with the payload read |
frankvnk | 0:c44f0314d6ec | 480 | if (!SpiReadDataCont()) |
frankvnk | 0:c44f0314d6ec | 481 | { |
frankvnk | 1:bbcaf0b2f367 | 482 | // All the data was read - finalize handling by switching to the task |
frankvnk | 0:c44f0314d6ec | 483 | SpiTriggerRxProcessing(); |
frankvnk | 0:c44f0314d6ec | 484 | } |
frankvnk | 0:c44f0314d6ec | 485 | } |
frankvnk | 0:c44f0314d6ec | 486 | |
frankvnk | 0:c44f0314d6ec | 487 | //***************************************************************************** |
frankvnk | 0:c44f0314d6ec | 488 | // |
frankvnk | 0:c44f0314d6ec | 489 | // Close the Doxygen group. |
frankvnk | 0:c44f0314d6ec | 490 | //! @} |
frankvnk | 0:c44f0314d6ec | 491 | // |
frankvnk | 0:c44f0314d6ec | 492 | //***************************************************************************** |
frankvnk | 0:c44f0314d6ec | 493 | |
frankvnk | 0:c44f0314d6ec | 494 | |
frankvnk | 0:c44f0314d6ec | 495 | |
frankvnk | 0:c44f0314d6ec | 496 |