/*!
* @brief Sends data to BMG160 via SPI
*
* @param[in] dev_addr Device I2C slave address (not used)
*
* @param[in] reg_addr Address of destination register
*
* @param[in] reg_data Pointer to data buffer to be sent
*
* @param[in] length Length of the data to be sent
*
* @retval 0 BMG160_SUCCESS
* @retval -1 BMG160_ERROR
*
*/
int8_t bmg_spi_write(uint8_t dev_addr, uint8_t reg_addr, uint8_t *reg_data, uint8_t length)
{
enum status_code bmg_write_stat = STATUS_NO_CHANGE;
/* This variable is used to avoid infinite loops. */
uint16_t loop_count;
spi_select_slave(&spi_master_instance, &bmg160_spi_slave, true);
loop_count = 0;
do
{
bmg_write_stat = spi_write_buffer_wait(&spi_master_instance, ®_addr, 1);
loop_count++;
}while(bmg_write_stat != STATUS_OK && loop_count < 100);
loop_count = 0;
do
{
bmg_write_stat = spi_write_buffer_wait(&spi_master_instance, reg_data, length);
loop_count++;
}while(bmg_write_stat != STATUS_OK && loop_count < 100);
spi_select_slave(&spi_master_instance, &bmg160_spi_slave, false);
if (bmg_write_stat != STATUS_OK)
{
return -1;
}
return 0;
}
/**
* \brief Executed the end of a multi blocks write transfer
*
* \return true if success, otherwise false
* with a update of \ref sd_mmc_spi_err.
*/
static bool sd_mmc_spi_stop_multiwrite_block(void)
{
uint8_t value;
if (1 == sd_mmc_spi_nb_block) {
return true; // Single block write
}
if (sd_mmc_spi_nb_block >
(sd_mmc_spi_transfert_pos / sd_mmc_spi_block_size)) {
return true; // It is not the End of multi write
}
// Delay before start write block:
// Nwr timing minimum = 8 cylces
value = 0xFF;
spi_write_buffer_wait(&sd_mmc_master, &value, 1);
// Send stop token
value = SPI_TOKEN_STOP_TRAN;
spi_write_buffer_wait(&sd_mmc_master, &value, 1);
// Wait busy
if (!sd_mmc_spi_wait_busy()) {
sd_mmc_spi_err = SD_MMC_SPI_ERR_WRITE_TIMEOUT;
sd_mmc_spi_debug("%s: Stop write blocks timeout\n\r",
__func__);
return false;
}
return true;
}
bool sd_mmc_spi_start_write_blocks(const void *src, uint16_t nb_block)
{
uint32_t pos;
sd_mmc_spi_err = SD_MMC_SPI_NO_ERR;
pos = 0;
while (nb_block--) {
Assert(sd_mmc_spi_nb_block >
(sd_mmc_spi_transfert_pos / sd_mmc_spi_block_size));
sd_mmc_spi_start_write_block();
// Write block
spi_write_buffer_wait(&sd_mmc_master, &((uint8_t*)src)[pos],
sd_mmc_spi_block_size);
pos += sd_mmc_spi_block_size;
sd_mmc_spi_transfert_pos += sd_mmc_spi_block_size;
if (!sd_mmc_spi_stop_write_block()) {
return false;
}
// Do not check busy of last block
// but delay it to mci_wait_end_of_write_blocks()
if (nb_block) {
// Wait busy due to data programmation
if (!sd_mmc_spi_wait_busy()) {
sd_mmc_spi_err = SD_MMC_SPI_ERR_WRITE_TIMEOUT;
sd_mmc_spi_debug("%s: Write blocks timeout\n\r", __func__);
return false;
}
}
}
return true;
}
bool sd_mmc_spi_write_word(uint32_t value)
{
sd_mmc_spi_err = SD_MMC_SPI_NO_ERR;
Assert(sd_mmc_spi_nb_block >
(sd_mmc_spi_transfert_pos / sd_mmc_spi_block_size));
if (!(sd_mmc_spi_transfert_pos % sd_mmc_spi_block_size)) {
// New block
sd_mmc_spi_start_write_block();
}
// Write data
value = cpu_to_le32(value);
spi_write_buffer_wait(&sd_mmc_master, (uint8_t*)&value, 4);
sd_mmc_spi_transfert_pos += 4;
if (!(sd_mmc_spi_transfert_pos % sd_mmc_spi_block_size)) {
// End of block
if (!sd_mmc_spi_stop_write_block()) {
return false;
}
// Wait busy due to data programmation
if (!sd_mmc_spi_wait_busy()) {
sd_mmc_spi_err = SD_MMC_SPI_ERR_WRITE_TIMEOUT;
sd_mmc_spi_debug("%s: Write blocks timeout\n\r", __func__);
return false;
}
}
return sd_mmc_spi_stop_multiwrite_block();
}
/**
* \brief Sends the correct TOKEN on the line to start a write block transfer
*/
static void sd_mmc_spi_start_write_block(void)
{
uint8_t dummy = 0xFF;
Assert(!(sd_mmc_spi_transfert_pos % sd_mmc_spi_block_size));
// Delay before start write block:
// Nwr timing minimum = 8 cylces
spi_write_buffer_wait(&sd_mmc_master,&dummy, 1);
// Send start token
uint8_t token;
if (1 == sd_mmc_spi_nb_block) {
token = SPI_TOKEN_SINGLE_WRITE;
} else {
token = SPI_TOKEN_MULTI_WRITE;
}
spi_write_buffer_wait(&sd_mmc_master,&token, 1);
}
/**
* \brief Waits the TOKEN which notify the end of write block transfer
*
* \return true if success, otherwise false
* with a update of \ref sd_mmc_spi_err.
*/
static bool sd_mmc_spi_stop_write_block(void)
{
uint8_t resp;
uint16_t crc;
uint16_t dummy = 0xFF;
// Send CRC
crc = 0xFFFF; /// CRC is disabled in SPI mode
spi_write_buffer_wait(&sd_mmc_master, (uint8_t *)&crc, 2);
// Receiv data response token
spi_read_buffer_wait(&sd_mmc_master, &resp, 1,
dummy);
if (!SPI_TOKEN_DATA_RESP_VALID(resp)) {
sd_mmc_spi_err = SD_MMC_SPI_ERR;
sd_mmc_spi_debug("%s: Invalid Data Response Token 0x%x\n\r", __func__, resp);
return false;
}
// Check data response
switch (SPI_TOKEN_DATA_RESP_CODE(resp)) {
case SPI_TOKEN_DATA_RESP_ACCEPTED:
break;
case SPI_TOKEN_DATA_RESP_CRC_ERR:
sd_mmc_spi_err = SD_MMC_SPI_ERR_WRITE_CRC;
sd_mmc_spi_debug("%s: Write blocks, SD_MMC_SPI_ERR_CRC, resp 0x%x\n\r",
__func__, resp);
return false;
case SPI_TOKEN_DATA_RESP_WRITE_ERR:
default:
sd_mmc_spi_err = SD_MMC_SPI_ERR_WRITE;
sd_mmc_spi_debug("%s: Write blocks SD_MMC_SPI_ERR_WR, resp 0x%x\n\r",
__func__, resp);
return false;
}
return true;
}
/**
* \brief Writes a command to the display controller
*
* This functions pull pin D/C# low before writing to the controller. Different
* data write function is called based on the selected interface.
*
* \param command the command to write
*/
void ssd1306_write_command(uint8_t command)
{
spi_select_slave(&ssd1306_master, &ssd1306_slave, true);
port_pin_set_output_level(SSD1306_DC_PIN, false);
spi_write_buffer_wait(&ssd1306_master, &command, 1);
spi_select_slave(&ssd1306_master, &ssd1306_slave, false);
}
/**
* \brief Write data to the display controller
*
* This functions sets the pin D/C# before writing to the controller. Different
* data write function is called based on the selected interface.
*
* \param data the data to write
*/
void ssd1306_write_data(uint8_t data)
{
spi_select_slave(&ssd1306_master, &ssd1306_slave, true);
port_pin_set_output_level(SSD1306_DC_PIN, true);
spi_write_buffer_wait(&ssd1306_master, &data, 1);
spi_select_slave(&ssd1306_master, &ssd1306_slave, false);
}
int main(void)
{
//! [main_start]
/* Initialize system */
//! [system_init]
system_init();
//! [system_init]
//! [run_config]
configure_spi_slave();
//! [run_config]
//! [main_start]
//! [main_use_case]
//! [write]
while (spi_write_buffer_wait(&spi_slave_instance, buffer, BUF_LENGTH) != STATUS_OK) {
/* Wait for transfer from master */
}
//! [write]
//! [inf_loop]
while (true) {
/* Infinite loop */
}
//! [inf_loop]
//! [main_use_case]
}
int main(void)
{
//! [main_setup]
//! [system_init]
system_init();
//! [system_init]
//! [run_config]
configure_spi_master();
//! [run_config]
//! [main_setup]
//! [main_use_case]
//! [inf_loop]
while (true) {
/* Infinite loop */
if(!port_pin_get_input_level(BUTTON_0_PIN)) {
//! [select_slave]
spi_select_slave(&spi_master_instance, &slave, true);
//! [select_slave]
//! [write]
spi_write_buffer_wait(&spi_master_instance, buffer, BUF_LENGTH);
//! [write]
//! [deselect_slave]
spi_select_slave(&spi_master_instance, &slave, false);
//! [deselect_slave]
//! [light_up]
port_pin_set_output_level(LED_0_PIN, LED0_ACTIVE);
//! [light_up]
}
}
//! [inf_loop]
//! [main_use_case]
}
int main(void)
{
//! [main_setup]
//! [system_init]
system_init();
//! [system_init]
//! [run_config]
configure_spi_master();
//! [run_config]
//! [main_setup]
//! [main_use_case]
//! [select_slave]
spi_select_slave(&spi_master_instance, &slave, true);
//! [select_slave]
//! [write]
spi_write_buffer_wait(&spi_master_instance, buffer, BUF_LENGTH);
//! [write]
//! [deselect_slave]
spi_select_slave(&spi_master_instance, &slave, false);
//! [deselect_slave]
//! [inf_loop]
while (true) {
/* Infinite loop */
}
//! [inf_loop]
//! [main_use_case]
}
int cph_deca_spi_write(uint16_t headerLength, const uint8_t *headerBuffer, uint32_t bodylength, const uint8_t *bodyBuffer) {
status_code_t result = STATUS_OK;
cph_deca_spi_ss_select();
if ((result = spi_write_buffer_wait(&spi_master_instance, headerBuffer, headerLength)) == STATUS_OK) {
result = spi_write_buffer_wait(&spi_master_instance, bodyBuffer, bodylength);
}
cph_deca_spi_ss_deselect();
if (result != STATUS_OK) {
printf("writetospi_serial timeout\r\n");
}
return result;
}
/**
* \brief Complete write operation.
*
* \param pad amount of dummy data (bytes) to write to keep 32 bits alignment
* in the internal FIFO.
*/
void ksz8851_fifo_write_end(uint32_t pad)
{
uint8_t outbuf[5];
if (pad > 0) {
spi_write_buffer_wait(&ksz8851snl_master, outbuf, 4 - pad);
}
spi_select_slave(&ksz8851snl_master, &ksz8851snl_slave, false);
}
void sd_mmc_spi_send_clock(void)
{
uint8_t i;
uint8_t dummy = 0xFF;
sd_mmc_spi_err = SD_MMC_SPI_NO_ERR;
//! Send 80 cycles
for (i = 0; i < 10; i++) {
spi_write_buffer_wait(&sd_mmc_master, &dummy, 1); // 8 cycles
}
}
int main (void)
{
system_init();
while ( !system_clock_source_is_ready(SYSTEM_CLOCK_SOURCE_DPLL) ) {
}
// Disable the pin select for the CAN Controller
fnc_can_controller_disable();
// Perform the SERCOM configuration for this board
bastian_complete_sercom_setup();
// TCC Configuration
tcc_configure_function(); // Counter Configuration
tcc_callback_configuration(); // Timer Callback Configuration
// Select Slave
spi_select_slave(&spi_master, &spi_shield, false);
// Wait the necessary time for the chip to restart
inProgress = true;
intProgressTimer = 100; // wait for 11ms
while ( inProgress ) { }
// Read the status from the on-board CAN controller
spi_select_slave(&spi_master, &spi_CAN_controller, true);
spi_write_buffer_wait(&spi_master, wr_can_buffer_startup, SYSTEM_SLAVE_TX_SINGLE_BYTE);
spi_select_slave(&spi_master, &spi_CAN_controller, false);
// Wait the necessary time for the chip to restart
inProgress = true;
intProgressTimer = 50; // wait for 11ms
while ( inProgress ) { }
spi_select_slave(&spi_master, &spi_CAN_controller, true);
spi_transceive_buffer_job(&spi_master, &wr_can_buffer_startup[1], rd_buffer, SYSTEM_SLAVE_STATUS_TRANSACTION_LENGTH);
//spi_select_slave(&spi_master, &spi_CAN_controller, false);
// inProgress = true;
// intProgressTimer = 10; // wait for 2ms
// while ( inProgress ) { }
//
// spi_select_slave(&spi_master, &spi_CAN_controller, true);
// spi_transceive_buffer_job(&spi_master, wr_can_buffer, rd_buffer, SYSTEM_SLAVE_STATUS_TRANSACTION_LENGTH);
// Main Loop
while (1) {
}
}
enum ab1815_status ab1815_write(struct ab1815_t *clock, uint8_t offset, uint8_t *buf, uint8_t length)
{
uint8_t buffer[length + 1];
enum ab1815_status ret_code = ab1815_status_ERROR;
buffer[0] = AB1815_SPI_WRITE(offset);
memcpy(buffer + 1, buf, length);
spi_select_slave(clock->spi_bus, clock->slave, true);
if(spi_write_buffer_wait(clock->spi_bus, buffer, length + 1) == STATUS_OK)
{
ret_code = ab1815_status_OK;
}
spi_select_slave(clock->spi_bus, clock->slave, false);
return ret_code;
};
enum ab1815_status ab1815_read(struct ab1815_t *clock, uint8_t offset, uint8_t *buf, uint8_t length)
{
uint8_t address = AB1815_SPI_READ(offset);
enum ab1815_status ret_code = ab1815_status_ERROR;
spi_select_slave(clock->spi_bus, clock->slave, true);
if(spi_write_buffer_wait(clock->spi_bus, &address, 1) == STATUS_OK)
{
if(spi_read_buffer_wait(clock->spi_bus, buf, length, SPI_DUMMY) == STATUS_OK)
{
ret_code = ab1815_status_OK;
}
}
spi_select_slave(clock->spi_bus, clock->slave, false);
return ret_code;
};
int cph_deca_spi_read(uint16_t headerLength, const uint8_t *headerBuffer, uint32_t readlength, uint8_t *readBuffer) {
status_code_t result = STATUS_OK;
cph_deca_spi_ss_select();
if ((result = spi_write_buffer_wait(&spi_master_instance, headerBuffer, headerLength)) == STATUS_OK) {
result = spi_read_buffer_wait(&spi_master_instance, readBuffer, readlength, 0xff);
}
cph_deca_spi_ss_deselect();
if (result != STATUS_OK) {
printf("readfromspi_serial timeout\r\n");
}
return result;
}
/**
* \internal
* \brief Test: Sends data at different baud rates.
*
* This test sends (writes) a byte to the slave and receives the data
* at different baudrate testing up to the maximum allowed level.
*
* Transmission and reception are carried out by polling.
*
* \param test Current test case.
*/
static void run_baud_test(const struct test_case *test)
{
uint32_t test_baud = 1000000;
uint8_t txd_data = 0x55;
uint8_t rxd_data = 0;
bool max_baud = true;
/* Skip test if initialization failed */
test_assert_true(test, spi_init_success,
"Skipping test due to failed initialization");
/* Structure for SPI configuration */
struct spi_config config;
/* Configure the SPI master */
spi_get_config_defaults(&config);
config.mux_setting = CONF_SPI_MASTER_SPI_MUX;
config.pinmux_pad0 = CONF_SPI_MASTER_DATA_IN_PIN_MUX;
config.pinmux_pad1 = PINMUX_UNUSED;
config.pinmux_pad2 = CONF_SPI_MASTER_DATA_OUT_PIN_MUX;
config.pinmux_pad3 = CONF_SPI_MASTER_SCK_PIN_MUX;
do {
spi_disable(&master);
config.mode_specific.master.baudrate = test_baud;
spi_init(&master, CONF_SPI_MASTER_MODULE, &config);
spi_enable(&master);
/* Send data to slave */
spi_select_slave(&master, &slave_inst, true);
spi_write_buffer_wait(&master, &txd_data, 1);
spi_read_buffer_wait(&slave, &rxd_data, 1, 0);
spi_select_slave(&master, &slave_inst, false);
if (txd_data != rxd_data) {
max_baud = false;
break;
}
test_baud += 1000000;
} while (test_baud <= 24000000);
/* Output the result */
test_assert_true(test, max_baud,
"Test failed at baudrate: %lu", test_baud);
}
/**
* \brief Start to write internal fifo buffer.
*
* \param tot_len the total amount of data to write.
*/
void ksz8851_fifo_write_begin(uint32_t tot_len)
{
uint8_t outbuf[5];
static uint8_t frameID = 0;
spi_select_slave(&ksz8851snl_master, &ksz8851snl_slave, true);
/* Prepare control word and byte count. */
outbuf[0] = FIFO_WRITE;
outbuf[1] = frameID++ & 0x3f;
outbuf[2] = 0;
outbuf[3] = tot_len & 0xff;
outbuf[4] = tot_len >> 8;
/* Perform SPI transfer. */
spi_write_buffer_wait(&ksz8851snl_master, outbuf, 5);
}
/**
* \internal
* \brief Test: Send data by polling & receive with interrupt.
*
* This test sends (writes) an array of data to the slave by polling and
* receives (reads) the buffer back with interrupt and compares.
*
* \param test Current test case.
*/
static void run_buffer_polled_write_interrupt_read_test
(const struct test_case *test)
{
uint16_t i;
uint16_t timeout_cycles;
/* Skip test if initialization failed */
test_assert_true(test, spi_init_success,
"Skipping test due to failed initialization");
/* Start the test */
transfer_complete = false;
timeout_cycles = 1000;
spi_select_slave(&master, &slave_inst, true);
spi_read_buffer_job(&slave, rx_buf, BUFFER_LENGTH, 0);
spi_write_buffer_wait(&master, tx_buf, BUFFER_LENGTH);
/* Wait until reception completes */
do {
timeout_cycles--;
if (transfer_complete) {
break;
}
} while (timeout_cycles != 0);
spi_select_slave(&master, &slave_inst, false);
test_assert_true(test, timeout_cycles > 0,
"Timeout in reception");
/* Compare received data with transmitted data */
if (transfer_complete) {
for (i = 0; i < BUFFER_LENGTH; i++) {
test_assert_true(test, tx_buf[i] == rx_buf[i],
"Bytes differ at buffer index %d : %d != %d",
i, tx_buf[i], rx_buf[i]);
}
}
}
/*
* @brief spi_isr SPI isr call back handler
*
* @param return kick_scheduler_t
*
*/
kick_scheduler_t spi_isr(void)
{
#ifdef SPI_IN_INTERRUPT_MODE
/* save the byte just received in the RX buffer */
switch (spi_vars.returnType)
{
case SPI_FIRSTBYTE:
if (spi_vars.numTxedBytes==0)
{
spi_read_buffer_wait(&master, spi_vars.pNextRxByte, 1, 0);
}
break;
case SPI_BUFFER:
spi_read_buffer_wait(&master, spi_vars.pNextRxByte, 1, 0);
spi_vars.pNextRxByte++;
break;
case SPI_LASTBYTE:
spi_read_buffer_wait(&master, spi_vars.pNextRxByte, 1, 0);
break;
}
/* one byte less to go */
spi_vars.pNextTxByte++;
spi_vars.numTxedBytes++;
spi_vars.txBytesLeft--;
if (spi_vars.txBytesLeft>0) {
/* write next byte to TX buffer */
spi_write_buffer_wait(&master, spi_vars.pNextTxByte, 1);
} else {
/* put CS signal high to signal end of transmission to slave */
if (spi_vars.isLast==SPI_LAST) {
/* Stop the SPI transaction by setting SEL high */
spi_select_slave(&master, &slave, false);
}
/* SPI is not busy anymore */
spi_vars.busy = 0;
/* SPI is done! */
if (spi_vars.callback!=NULL) {
/* call the callback */
spi_vars.callback();
/* kick the OS */
return KICK_SCHEDULER;
}
}
return DO_NOT_KICK_SCHEDULER;
#else
/* this should never happen! */
while(1);
/* we can not print from within the BSP. Instead we
blink the error LED */
leds_error_blink();
/* reset the board */
board_reset();
/* execution will not reach here, statement to make compiler happy */
return DO_NOT_KICK_SCHEDULER;
#endif
}
void SPI_Write_ADXL(uint8_t* data)
{
port_pin_set_output_level(PIN_PA06, 0);
spi_write_buffer_wait(&spi_master_instance_ADXL, data, 2);
port_pin_set_output_level(PIN_PA06, 1);
}
void SPI_Write_AD5421(uint8_t* data)
{
port_pin_set_output_level(PIN_PA18, 0);
spi_write_buffer_wait(&spi_master_instance_AD5421, data, 3);
port_pin_set_output_level(PIN_PA18, 1);
}
/**
* \brief Write internal fifo buffer.
*
* \param buf the buffer to send to the fifo buffer.
* \param len the size of the pbuf element to write.
*/
void ksz8851_fifo_write(uint8_t *buf, uint32_t len)
{
/* Perform SPI transfer. */
spi_write_buffer_wait(&ksz8851snl_master, buf, len);
}
/*==============================================================================
hal_spiWrite()
=============================================================================*/
void hal_spiWrite(uint8_t * c_value, uint16_t i_length)
{
if (spi_write_buffer_wait(&st_masterInst,c_value,i_length) != STATUS_OK)
// LOG_ERR("%s\n\r","SPI write error!");
;
} /* hal_spiWrite() */
bool sd_mmc_spi_adtc_start(sdmmc_cmd_def_t cmd, uint32_t arg,
uint16_t block_size, uint16_t nb_block, bool access_block)
{
uint8_t dummy = 0xFF;
uint8_t cmd_token[6];
uint8_t ncr_timeout;
uint8_t r1; //! R1 response
uint16_t dummy2 = 0xFF;
UNUSED(access_block);
Assert(cmd & SDMMC_RESP_PRESENT); // Always a response in SPI mode
sd_mmc_spi_err = SD_MMC_SPI_NO_ERR;
// Encode SPI command
cmd_token[0] = SPI_CMD_ENCODE(SDMMC_CMD_GET_INDEX(cmd));
cmd_token[1] = arg >> 24;
cmd_token[2] = arg >> 16;
cmd_token[3] = arg >> 8;
cmd_token[4] = arg;
cmd_token[5] = sd_mmc_spi_crc7(cmd_token, 5);
// 8 cycles to respect Ncs timing
// Note: This byte does not include start bit "0",
// thus it is ignored by card.
spi_write_buffer_wait(&sd_mmc_master, &dummy, 1);
// Send command
spi_write_buffer_wait(&sd_mmc_master, cmd_token, sizeof(cmd_token));
// Wait for response
// Two retry will be done to manage the Ncr timing between command and reponse
// Ncr: Min. 1x8 clock cycle, Max. 8x8 clock cycles
// WORKAROUND for no compliance card (Atmel Internal ref. SD13):
r1 = 0xFF;
// Ignore first byte because Ncr min. = 8 clock cylces
spi_read_buffer_wait(&sd_mmc_master, &r1, 1,
dummy2);
ncr_timeout = 7;
while (1) {
spi_read_buffer_wait(&sd_mmc_master, &r1, 1,
dummy2); // 8 cycles
if ((r1 & R1_SPI_ERROR) == 0) {
// Valid R1 response
break;
}
if (--ncr_timeout == 0) {
// Here Valid R1 response received
sd_mmc_spi_debug("%s: cmd %02d, arg 0x%08lX, R1 timeout\n\r",
__func__, (int)SDMMC_CMD_GET_INDEX(cmd), arg);
sd_mmc_spi_err = SD_MMC_SPI_ERR_RESP_TIMEOUT;
return false;
}
}
// Save R1 (Specific to SPI interface) in 32 bit response
// The R1_SPI_IDLE bit can be checked by high level
sd_mmc_spi_response_32 = r1;
// Manage error in R1
if (r1 & R1_SPI_COM_CRC) {
sd_mmc_spi_debug("%s: cmd %02d, arg 0x%08lx, r1 0x%02x, R1_SPI_COM_CRC\n\r",
__func__, (int)SDMMC_CMD_GET_INDEX(cmd), arg, r1);
sd_mmc_spi_err = SD_MMC_SPI_ERR_RESP_CRC;
return false;
}
if (r1 & R1_SPI_ILLEGAL_COMMAND) {
sd_mmc_spi_debug("%s: cmd %02d, arg 0x%08lx, r1 0x%x, R1 ILLEGAL_COMMAND\n\r",
__func__, (int)SDMMC_CMD_GET_INDEX(cmd), arg, r1);
sd_mmc_spi_err = SD_MMC_SPI_ERR_ILLEGAL_COMMAND;
return false;
}
if (r1 & ~R1_SPI_IDLE) {
// Other error
sd_mmc_spi_debug("%s: cmd %02d, arg 0x%08lx, r1 0x%x, R1 error\n\r",
__func__, (int)SDMMC_CMD_GET_INDEX(cmd), arg, r1);
sd_mmc_spi_err = SD_MMC_SPI_ERR;
return false;
}
// Manage other responses
if (cmd & SDMMC_RESP_BUSY) {
if (!sd_mmc_spi_wait_busy()) {
sd_mmc_spi_err = SD_MMC_SPI_ERR_RESP_BUSY_TIMEOUT;
sd_mmc_spi_debug("%s: cmd %02d, arg 0x%08lx, Busy signal always high\n\r",
__func__, (int)SDMMC_CMD_GET_INDEX(cmd), arg);
return false;
}
}
if (cmd & SDMMC_RESP_8) {
sd_mmc_spi_response_32 = 0;
spi_read_buffer_wait(&sd_mmc_master, (uint8_t *)&sd_mmc_spi_response_32, 1,
dummy2);
sd_mmc_spi_response_32 = le32_to_cpu(sd_mmc_spi_response_32);
}
if (cmd & SDMMC_RESP_32) {
spi_read_buffer_wait(&sd_mmc_master, (uint8_t *)&sd_mmc_spi_response_32, 4,
dummy2);
sd_mmc_spi_response_32 = be32_to_cpu(sd_mmc_spi_response_32);
}
sd_mmc_spi_block_size = block_size;
sd_mmc_spi_nb_block = nb_block;
sd_mmc_spi_transfert_pos = 0;
return true; // Command complete
}
/*
* @brief spi_txrx SPI transmit and receive the data
*
* @param bufTx Transmit Buffer
* @param lenbufTx Length of transmit buffer
* @param returnType
* @param bufRx SPI Rx Buffer
* @param Max Length of Rx Buffer size
* @param isFirst
* @param isLast
*
*/
void spi_txrx(uint8_t* bufTx,
uint8_t lenbufTx,
spi_return_t returnType,
uint8_t* bufRx,
uint8_t maxLenBufRx,
spi_first_t isFirst,
spi_last_t isLast)
{
uint8_t spi_byte;
#ifdef SPI_IN_INTERRUPT_MODE
/* Disable the interrupts */
cpu_irq_disable();
#endif
/* register spi frame to send */
spi_vars.pNextTxByte = bufTx;
spi_vars.numTxedBytes = 0;
spi_vars.txBytesLeft = lenbufTx;
spi_vars.returnType = returnType;
spi_vars.pNextRxByte = bufRx;
spi_vars.maxRxBytes = maxLenBufRx;
spi_vars.isFirst = isFirst;
spi_vars.isLast = isLast;
/* SPI is now busy */
spi_vars.busy = 1;
/* lower CS signal to have slave listening */
if (spi_vars.isFirst==SPI_FIRST) {
/* Start SPI transaction by pulling SEL low */
port_pin_set_level(AT86RFX_SPI_CS, SET_LOW);
cpu_delay_us(10);
}
#ifdef SPI_IN_INTERRUPT_MODE
/* implementation 1. use a callback function when transaction finishes */
/* Send the Read command byte */
spi_write_buffer_wait(&master, spi_vars.pNextTxByte, 1);
/* re-enable interrupts */
cpu_irq_enable();
#else
/* implementation 2. busy wait for each byte to be sent */
/* send all bytes */
while (spi_vars.txBytesLeft > 0)
{
/* write next byte to TX buffer */
/* Send the Read command byte */
spi_byte = *spi_vars.pNextTxByte;
spi_txrx_data(&spi_byte);
/* save the byte just received in the RX buffer */
switch (spi_vars.returnType) {
case SPI_FIRSTBYTE:
if (spi_vars.numTxedBytes==0) {
*spi_vars.pNextRxByte = spi_byte;
}
break;
case SPI_BUFFER:
*spi_vars.pNextRxByte = spi_byte;
spi_vars.pNextRxByte++;
break;
case SPI_LASTBYTE:
*spi_vars.pNextRxByte = spi_byte;
break;
}
/* one byte less to go */
spi_vars.pNextTxByte++;
spi_vars.numTxedBytes++;
spi_vars.txBytesLeft--;
}
/* put CS signal high to signal end of transmission to slave */
if (spi_vars.isLast==SPI_LAST)
{
/* Stop the SPI transaction by setting SEL high */
port_pin_set_level(AT86RFX_SPI_CS, SET_HIGH);
}
/* SPI is not busy anymore */
spi_vars.busy = 0;
#endif
}
/**
* \brief Function for sending acknowledgement to SPI Master
*
* This function will send an acknowledgement byte 's' to the master to
* indicate the master that it has received and programmed the data.
*/
static void send_ack(void)
{
uint8_t ack = 's';
spi_write_buffer_wait(&slave, &ack, 1);
}