diff options
Diffstat (limited to 'drivers/cc3000/src/ccspi.c')
| -rw-r--r-- | drivers/cc3000/src/ccspi.c | 455 |
1 files changed, 0 insertions, 455 deletions
diff --git a/drivers/cc3000/src/ccspi.c b/drivers/cc3000/src/ccspi.c deleted file mode 100644 index 1dcd61884..000000000 --- a/drivers/cc3000/src/ccspi.c +++ /dev/null @@ -1,455 +0,0 @@ -/***************************************************************************** - * - * spi.c - 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. - * - *****************************************************************************/ - -#include <string.h> - -#include "py/runtime.h" -#include "pin.h" -#include "led.h" -#include "extint.h" -#include "spi.h" -#include "ccspi.h" -#include "evnt_handler.h" - -#if 0 // print debugging info -#include <stdio.h> -#define DEBUG_printf(args...) printf(args) -#else // don't print debugging info -#define DEBUG_printf(args...) (void)0 -#endif - -// these need to be set to valid values before anything in this file will work -STATIC const spi_t *SPI_HANDLE = NULL; -STATIC const pin_obj_t *PIN_CS = NULL; -STATIC const pin_obj_t *PIN_EN = NULL; -STATIC const pin_obj_t *PIN_IRQ = NULL; - -#define CS_LOW() HAL_GPIO_WritePin(PIN_CS->gpio, PIN_CS->pin_mask, GPIO_PIN_RESET) -#define CS_HIGH() HAL_GPIO_WritePin(PIN_CS->gpio, PIN_CS->pin_mask, GPIO_PIN_SET) - -#define READ 3 -#define WRITE 1 - -#define HI(value) (((value) & 0xFF00) >> 8) -#define LO(value) ((value) & 0x00FF) - -#define SPI_TIMEOUT (1000) -#define HEADERS_SIZE_EVNT (SPI_HEADER_SIZE + 5) - -/* SPI bus states */ -#define eSPI_STATE_POWERUP (0) -#define eSPI_STATE_INITIALIZED (1) -#define eSPI_STATE_IDLE (2) -#define eSPI_STATE_WRITE_IRQ (3) -#define eSPI_STATE_WRITE_FIRST_PORTION (4) -#define eSPI_STATE_WRITE_EOT (5) -#define eSPI_STATE_READ_IRQ (6) -#define eSPI_STATE_READ_FIRST_PORTION (7) -#define eSPI_STATE_READ_EOT (8) - -// The magic number that resides at the end of the TX/RX buffer (1 byte after the allocated size) -// for the purpose of detection of the overrun. The location of the memory where the magic number -// resides shall never be written. In case it is written - the overrun occured and either recevie function -// or send function will stuck forever. -#define CC3000_BUFFER_MAGIC_NUMBER (0xDE) - -typedef struct { - gcSpiHandleRx SPIRxHandler; - unsigned short usTxPacketLength; - unsigned short usRxPacketLength; - unsigned long ulSpiState; - unsigned char *pTxPacket; - unsigned char *pRxPacket; -} tSpiInformation; -STATIC tSpiInformation sSpiInformation; - -STATIC char spi_buffer[CC3000_RX_BUFFER_SIZE]; -unsigned char wlan_tx_buffer[CC3000_TX_BUFFER_SIZE]; - -STATIC const mp_obj_fun_builtin_fixed_t irq_callback_obj; - -// set the pins to use to communicate with the CC3000 -// the arguments must be of type pin_obj_t* and SPI_HandleTypeDef* -void SpiInit(void *spi, const void *pin_cs, const void *pin_en, const void *pin_irq) { - SPI_HANDLE = spi; - PIN_CS = pin_cs; - PIN_EN = pin_en; - PIN_IRQ = pin_irq; -} - -void SpiClose(void) -{ - if (sSpiInformation.pRxPacket) { - sSpiInformation.pRxPacket = 0; - } - - tSLInformation.WlanInterruptDisable(); - - //HAL_SPI_DeInit(SPI_HANDLE); -} - -void SpiOpen(gcSpiHandleRx pfRxHandler) -{ - DEBUG_printf("SpiOpen\n"); - - /* initialize SPI state */ - sSpiInformation.ulSpiState = eSPI_STATE_POWERUP; - sSpiInformation.SPIRxHandler = pfRxHandler; - sSpiInformation.usTxPacketLength = 0; - sSpiInformation.pTxPacket = NULL; - sSpiInformation.pRxPacket = (unsigned char *)spi_buffer; - sSpiInformation.usRxPacketLength = 0; - spi_buffer[CC3000_RX_BUFFER_SIZE - 1] = CC3000_BUFFER_MAGIC_NUMBER; - wlan_tx_buffer[CC3000_TX_BUFFER_SIZE - 1] = CC3000_BUFFER_MAGIC_NUMBER; - - /* SPI configuration */ - SPI_InitTypeDef *init = &SPI_HANDLE->spi->Init; - init->Mode = SPI_MODE_MASTER; - init->Direction = SPI_DIRECTION_2LINES; - init->DataSize = SPI_DATASIZE_8BIT; - init->CLKPolarity = SPI_POLARITY_LOW; - init->CLKPhase = SPI_PHASE_2EDGE; - init->NSS = SPI_NSS_SOFT; - init->BaudRatePrescaler = SPI_BAUDRATEPRESCALER_8; - init->FirstBit = SPI_FIRSTBIT_MSB; - init->TIMode = SPI_TIMODE_DISABLED; - init->CRCCalculation = SPI_CRCCALCULATION_DISABLED; - init->CRCPolynomial = 7; - spi_init(SPI_HANDLE, false); - - // configure wlan CS and EN pins - GPIO_InitTypeDef GPIO_InitStructure; - GPIO_InitStructure.Speed = GPIO_SPEED_FAST; - GPIO_InitStructure.Mode = GPIO_MODE_OUTPUT_PP; - GPIO_InitStructure.Pull = GPIO_NOPULL; - GPIO_InitStructure.Alternate = 0; - - GPIO_InitStructure.Pin = PIN_CS->pin_mask; - HAL_GPIO_Init(PIN_CS->gpio, &GPIO_InitStructure); - - GPIO_InitStructure.Pin = PIN_EN->pin_mask; - HAL_GPIO_Init(PIN_EN->gpio, &GPIO_InitStructure); - - HAL_GPIO_WritePin(PIN_CS->gpio, PIN_CS->pin_mask, GPIO_PIN_SET); - HAL_GPIO_WritePin(PIN_EN->gpio, PIN_EN->pin_mask, GPIO_PIN_RESET); - - /* do a dummy read, this ensures SCLK is low before - actual communications start, it might be required */ - CS_LOW(); - uint8_t buf[1]; - HAL_SPI_Receive(SPI_HANDLE->spi, buf, sizeof(buf), SPI_TIMEOUT); - CS_HIGH(); - - // register EXTI - extint_register((mp_obj_t)PIN_IRQ, GPIO_MODE_IT_FALLING, GPIO_PULLUP, (mp_obj_t)&irq_callback_obj, true); - extint_enable(PIN_IRQ->pin); - - DEBUG_printf("SpiOpen finished; IRQ.pin=%d IRQ_LINE=%d\n", PIN_IRQ->pin, PIN_IRQ->pin); -} - -long ReadWlanInterruptPin(void) -{ - return HAL_GPIO_ReadPin(PIN_IRQ->gpio, PIN_IRQ->pin_mask); -} - -void WriteWlanPin(unsigned char val) -{ - HAL_GPIO_WritePin(PIN_EN->gpio, PIN_EN->pin_mask, - (WLAN_ENABLE)? GPIO_PIN_SET:GPIO_PIN_RESET); -} - -STATIC void SpiWriteDataSynchronous(unsigned char *data, unsigned short size) -{ - DEBUG_printf("SpiWriteDataSynchronous(data=%p [%x %x %x %x], size=%u)\n", data, data[0], data[1], data[2], data[3], size); - __disable_irq(); - if (HAL_SPI_TransmitReceive(SPI_HANDLE->spi, data, data, size, SPI_TIMEOUT) != HAL_OK) { - //BREAK(); - } - __enable_irq(); - DEBUG_printf(" - rx data = [%x %x %x %x]\n", data[0], data[1], data[2], data[3]); -} - -STATIC void SpiReadDataSynchronous(unsigned char *data, unsigned short size) -{ - memset(data, READ, size); - __disable_irq(); - if (HAL_SPI_TransmitReceive(SPI_HANDLE->spi, data, data, size, SPI_TIMEOUT) != HAL_OK) { - //BREAK(); - } - __enable_irq(); -} - -STATIC void __delay_cycles(volatile int x) -{ - x *= 6; // for 168 MHz CPU - while (x--); -} - -STATIC long SpiFirstWrite(unsigned char *ucBuf, unsigned short usLength) -{ - DEBUG_printf("SpiFirstWrite %lu\n", sSpiInformation.ulSpiState); - - CS_LOW(); - - // Assuming we are running on 24 MHz ~50 micro delay is 1200 cycles; - __delay_cycles(1200); - - // SPI writes first 4 bytes of data - SpiWriteDataSynchronous(ucBuf, 4); - - __delay_cycles(1200); - - SpiWriteDataSynchronous(ucBuf + 4, usLength - 4); - - // From this point on - operate in a regular way - sSpiInformation.ulSpiState = eSPI_STATE_IDLE; - - CS_HIGH(); - - return(0); -} - -long SpiWrite(unsigned char *pUserBuffer, unsigned short usLength) -{ - DEBUG_printf("SpiWrite %lu\n", sSpiInformation.ulSpiState); - - unsigned char ucPad = 0; - - // Figure out the total length of the packet in order to figure out if there - // is padding or not - if(!(usLength & 0x0001)) { - ucPad++; - } - - pUserBuffer[0] = WRITE; - pUserBuffer[1] = HI(usLength + ucPad); - pUserBuffer[2] = LO(usLength + ucPad); - pUserBuffer[3] = 0; - pUserBuffer[4] = 0; - - usLength += (SPI_HEADER_SIZE + ucPad); - - // The magic number that resides at the end of the TX/RX buffer (1 byte after the allocated size) - // for the purpose of detection of the overrun. If the magic number is overriten - buffer overrun - // occurred - and we will stuck here forever! - if (wlan_tx_buffer[CC3000_TX_BUFFER_SIZE - 1] != CC3000_BUFFER_MAGIC_NUMBER) { - while (1); - } - - if (sSpiInformation.ulSpiState == eSPI_STATE_POWERUP) { - while (sSpiInformation.ulSpiState != eSPI_STATE_INITIALIZED); - } - - if (sSpiInformation.ulSpiState == eSPI_STATE_INITIALIZED) { - // This is time for first TX/RX transactions over SPI: - // the IRQ is down - so need to send read buffer size command - SpiFirstWrite(pUserBuffer, usLength); - } else { - // - // We need to prevent here race that can occur in case 2 back to back packets are sent to the - // device, so the state will move to IDLE and once again to not IDLE due to IRQ - // - tSLInformation.WlanInterruptDisable(); - - while (sSpiInformation.ulSpiState != eSPI_STATE_IDLE); - - sSpiInformation.ulSpiState = eSPI_STATE_WRITE_IRQ; - sSpiInformation.pTxPacket = pUserBuffer; - sSpiInformation.usTxPacketLength = usLength; - - // Assert the CS line and wait till SSI IRQ line is active and then initialize write operation - CS_LOW(); - - // Re-enable IRQ - if it was not disabled - this is not a problem... - tSLInformation.WlanInterruptEnable(); - - // check for a missing interrupt between the CS assertion and enabling back the interrupts - if (tSLInformation.ReadWlanInterruptPin() == 0) { - SpiWriteDataSynchronous(sSpiInformation.pTxPacket, sSpiInformation.usTxPacketLength); - - sSpiInformation.ulSpiState = eSPI_STATE_IDLE; - - CS_HIGH(); - } - } - - // Due to the fact that we are currently implementing a blocking situation - // here we will wait till end of transaction - while (eSPI_STATE_IDLE != sSpiInformation.ulSpiState); - - return(0); -} - -#if 0 -unused -STATIC void SpiReadPacket(void) -{ - int length; - - /* read SPI header */ - SpiReadDataSynchronous(sSpiInformation.pRxPacket, SPI_HEADER_SIZE); - - /* parse data length */ - STREAM_TO_UINT8(sSpiInformation.pRxPacket, SPI_HEADER_SIZE-1, length); - - /* read the remainder of the packet */ - SpiReadDataSynchronous(sSpiInformation.pRxPacket + SPI_HEADER_SIZE, length); - - sSpiInformation.ulSpiState = eSPI_STATE_READ_EOT; -} -#endif - -STATIC void SpiReadHeader(void) -{ - SpiReadDataSynchronous(sSpiInformation.pRxPacket, 10); -} - -STATIC void SpiTriggerRxProcessing(void) -{ - SpiPauseSpi(); - CS_HIGH(); - - // The magic number that resides at the end of the TX/RX buffer (1 byte after the allocated size) - // for the purpose of detection of the overrun. If the magic number is overriten - buffer overrun - // occurred - and we will stuck here forever! - if (sSpiInformation.pRxPacket[CC3000_RX_BUFFER_SIZE - 1] != CC3000_BUFFER_MAGIC_NUMBER) { - while (1); - } - - sSpiInformation.ulSpiState = eSPI_STATE_IDLE; - sSpiInformation.SPIRxHandler(sSpiInformation.pRxPacket + SPI_HEADER_SIZE); -} - - -STATIC long SpiReadDataCont(void) -{ - long data_to_recv=0; - unsigned char *evnt_buff, type; - - //determine what type of packet we have - evnt_buff = sSpiInformation.pRxPacket; - STREAM_TO_UINT8((char *)(evnt_buff + SPI_HEADER_SIZE), HCI_PACKET_TYPE_OFFSET, type); - - switch (type) { - case HCI_TYPE_DATA:{ - // We need to read the rest of data.. - STREAM_TO_UINT16((char *)(evnt_buff + SPI_HEADER_SIZE), - HCI_DATA_LENGTH_OFFSET, data_to_recv); - if (!((HEADERS_SIZE_EVNT + data_to_recv) & 1)) { - data_to_recv++; - } - - if (data_to_recv) { - SpiReadDataSynchronous(evnt_buff + 10, data_to_recv); - } - break; - } - case HCI_TYPE_EVNT: { - // Calculate the rest length of the data - STREAM_TO_UINT8((char *)(evnt_buff + SPI_HEADER_SIZE), - HCI_EVENT_LENGTH_OFFSET, data_to_recv); - data_to_recv -= 1; - - // Add padding byte if needed - if ((HEADERS_SIZE_EVNT + data_to_recv) & 1) { - data_to_recv++; - } - - if (data_to_recv) { - SpiReadDataSynchronous(evnt_buff + 10, data_to_recv); - } - - sSpiInformation.ulSpiState = eSPI_STATE_READ_EOT; - break; - } - } - - return 0; -} - -STATIC void SSIContReadOperation(void) -{ - // The header was read - continue with the payload read - if (!SpiReadDataCont()) { - /* All the data was read - finalize handling by switching - to the task and calling from task Event Handler */ - SpiTriggerRxProcessing(); - } -} - -STATIC mp_obj_t irq_callback(mp_obj_t line) { - DEBUG_printf("<< IRQ; state=%lu >>\n", sSpiInformation.ulSpiState); - switch (sSpiInformation.ulSpiState) { - case eSPI_STATE_POWERUP: - /* This means IRQ line was low call a callback of HCI Layer to inform on event */ - DEBUG_printf(" - POWERUP\n"); - sSpiInformation.ulSpiState = eSPI_STATE_INITIALIZED; - break; - case eSPI_STATE_IDLE: - DEBUG_printf(" - IDLE\n"); - sSpiInformation.ulSpiState = eSPI_STATE_READ_IRQ; - - /* IRQ line goes down - we are start reception */ - CS_LOW(); - - // Wait for TX/RX Compete which will come as DMA interrupt - SpiReadHeader(); - - sSpiInformation.ulSpiState = eSPI_STATE_READ_EOT; - - SSIContReadOperation(); - break; - case eSPI_STATE_WRITE_IRQ: - DEBUG_printf(" - WRITE IRQ\n"); - SpiWriteDataSynchronous(sSpiInformation.pTxPacket, sSpiInformation.usTxPacketLength); - - sSpiInformation.ulSpiState = eSPI_STATE_IDLE; - - CS_HIGH(); - break; - } - return mp_const_none; -} - -STATIC MP_DEFINE_CONST_FUN_OBJ_1(irq_callback_obj, irq_callback); - -void SpiPauseSpi(void) { - DEBUG_printf("SpiPauseSpi\n"); - extint_disable(PIN_IRQ->pin); -} - -void SpiResumeSpi(void) { - DEBUG_printf("SpiResumeSpi\n"); - extint_enable(PIN_IRQ->pin); -} |