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stm32-l053r8-em9304: use DMA for SPI transfers

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This commit is contained in:
Matthias Ringwald 2017-06-25 13:30:12 +02:00
parent 0003d56d31
commit da01dde272
1 changed files with 65 additions and 18 deletions
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81
port/stm32-l053r8-em9304/port.c
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@ -69,13 +69,17 @@ static const uint8_t hal_spi_em9304_read_command[] = {
const uint8_t hci_reset[] = { 0x01, 0x03, 0x0c, 0x00 };
static enum {
static volatile enum {
SPI_EM9304_IDLE,
SPI_EM9304_RX_W4_READ_COMMAND_SENT,
SPI_EM9304_RX_READ_COMMAND_SENT,
SPI_EM9304_RX_W4_DATA_RECEIVED,
SPI_EM9304_RX_DATA_RECEIVED,
SPI_EM9304_TX_W4_RDY,
SPI_EM9304_TX_W4_WRITE_COMMAND_SENT,
SPI_EM9304_TX_WRITE_COMMAND_SENT,
SPI_EM9304_TX_W4_DATA_SENT,
SPI_EM9304_TX_DATA_SENT,
} hal_spi_em9304_state;
#define SPI_EM9304_RX_BUFFER_SIZE 64
@ -105,6 +109,43 @@ static void hal_spi_em9304_reset(void){
hal_spi_em9304_rx_pos = 0;
}
void HAL_SPI_TxRxCpltCallback(SPI_HandleTypeDef *hspi){
switch (hal_spi_em9304_state){
case SPI_EM9304_RX_W4_READ_COMMAND_SENT:
hal_spi_em9304_state = SPI_EM9304_RX_READ_COMMAND_SENT;
// trigger run loop;
break;
case SPI_EM9304_TX_W4_WRITE_COMMAND_SENT:
hal_spi_em9304_state = SPI_EM9304_TX_WRITE_COMMAND_SENT;
// trigger run loop;
break;
default:
break;
}
}
void HAL_SPI_RxCpltCallback(SPI_HandleTypeDef *hspi){
switch (hal_spi_em9304_state){
case SPI_EM9304_RX_W4_DATA_RECEIVED:
hal_spi_em9304_state = SPI_EM9304_RX_DATA_RECEIVED;
// trigger run loop;
break;
default:
break;
}
}
void HAL_SPI_TxCpltCallback(SPI_HandleTypeDef *hspi){
switch (hal_spi_em9304_state){
case SPI_EM9304_TX_W4_DATA_SENT:
hal_spi_em9304_state = SPI_EM9304_TX_DATA_SENT;
// trigger run loop;
break;
default:
break;
}
}
static void hal_spi_em9304_process(void){
uint16_t bytes_to_read;
uint16_t bytes_ready;
@ -119,11 +160,11 @@ static void hal_spi_em9304_process(void){
// chip select
HAL_GPIO_WritePin(SPI1_CSN_GPIO_Port, SPI1_CSN_Pin, GPIO_PIN_RESET);
// send read command
HAL_SPI_TransmitReceive(&hspi1, (uint8_t*) hal_spi_em9304_read_command, hal_spi_em9304_slave_status, sizeof(hal_spi_em9304_read_command), HAL_MAX_DELAY);
// wait for read command sent
hal_spi_em9304_state = SPI_EM9304_RX_W4_READ_COMMAND_SENT;
// send read command
HAL_SPI_TransmitReceive_DMA(&hspi1, (uint8_t*) hal_spi_em9304_read_command, hal_spi_em9304_slave_status, sizeof(hal_spi_em9304_read_command));
}
if (hal_spi_em9304_tx_size){
// chip select
@ -134,19 +175,22 @@ static void hal_spi_em9304_process(void){
}
break;
case SPI_EM9304_RX_W4_READ_COMMAND_SENT:
case SPI_EM9304_RX_READ_COMMAND_SENT:
bytes_ready = hal_spi_em9304_slave_status[1];
bytes_to_read = bytes_ready;
if (bytes_to_read > hal_spi_em9304_rx_free_bytes()){
bytes_to_read = hal_spi_em9304_rx_free_bytes();
}
// read all data
HAL_SPI_Receive(&hspi1, &hal_spi_em9304_rx_buffer[hal_spi_em9304_rx_pos], bytes_to_read, HAL_MAX_DELAY);
hal_spi_em9304_rx_pos += bytes_to_read;
// wait for data received
hal_spi_em9304_state = SPI_EM9304_RX_W4_DATA_RECEIVED;
// read all data
HAL_SPI_Receive_DMA(&hspi1, &hal_spi_em9304_rx_buffer[hal_spi_em9304_rx_pos], bytes_to_read);
hal_spi_em9304_rx_pos += bytes_to_read;
break;
case SPI_EM9304_RX_W4_DATA_RECEIVED:
case SPI_EM9304_RX_DATA_RECEIVED:
// chip deselect
HAL_GPIO_WritePin(SPI1_CSN_GPIO_Port, SPI1_CSN_Pin, GPIO_PIN_SET);
@ -162,14 +206,16 @@ static void hal_spi_em9304_process(void){
case SPI_EM9304_TX_W4_RDY:
if (!hal_spi_em9304_rdy()) break;
// send write command
HAL_SPI_TransmitReceive(&hspi1, (uint8_t*) hal_spi_em9304_write_command, hal_spi_em9304_slave_status, sizeof(hal_spi_em9304_write_command), HAL_MAX_DELAY);
// wait for write command sent
hal_spi_em9304_state = SPI_EM9304_TX_W4_WRITE_COMMAND_SENT;
// send write command
HAL_SPI_TransmitReceive_DMA(&hspi1, (uint8_t*) hal_spi_em9304_write_command, hal_spi_em9304_slave_status, sizeof(hal_spi_em9304_write_command));
break;
case SPI_EM9304_TX_W4_WRITE_COMMAND_SENT:
case SPI_EM9304_TX_WRITE_COMMAND_SENT:
printf("TX: STS1 0x%02X, STS2 0x%02X\n", hal_spi_em9304_slave_status[0], hal_spi_em9304_slave_status[1]);
// check slave status and rx buffer space
@ -186,14 +232,15 @@ static void hal_spi_em9304_process(void){
bytes_to_send = max_bytes_to_send;
}
// send command
HAL_SPI_Transmit(&hspi1, (uint8_t*) hal_spi_em9304_tx_data, bytes_to_send, HAL_MAX_DELAY);
hal_spi_em9304_tx_size -= bytes_to_send;
// wait for tx data sent
hal_spi_em9304_state = SPI_EM9304_TX_W4_DATA_SENT;
// send command
HAL_SPI_Transmit_DMA(&hspi1, (uint8_t*) hal_spi_em9304_tx_data, bytes_to_send);
hal_spi_em9304_tx_size -= bytes_to_send;
break;
case SPI_EM9304_TX_W4_DATA_SENT:
case SPI_EM9304_TX_DATA_SENT:
// chip deselect
HAL_GPIO_WritePin(SPI1_CSN_GPIO_Port, SPI1_CSN_Pin, GPIO_PIN_SET);