#define validate_spi(stm_spi, which, len) do { (void) (which); (void) (len); } while (0)
#endif
+static void
+ao_spi_run(uint8_t id, uint8_t which, uint16_t len)
+{
+ struct stm_spi *stm_spi = ao_spi_stm_info[id].stm_spi;
+ uint8_t mosi_dma_index = ao_spi_stm_info[id].mosi_dma_index;
+ uint8_t miso_dma_index = ao_spi_stm_info[id].miso_dma_index;
+
+ validate_spi(stm_spi, which, len);
+
+ stm_spi->cr2 = ((0 << STM_SPI_CR2_TXEIE) |
+ (0 << STM_SPI_CR2_RXNEIE) |
+ (0 << STM_SPI_CR2_ERRIE) |
+ (0 << STM_SPI_CR2_SSOE) |
+ (1 << STM_SPI_CR2_TXDMAEN) |
+ (1 << STM_SPI_CR2_RXDMAEN));
+
+ ao_dma_start(miso_dma_index);
+ ao_dma_start(mosi_dma_index);
+
+ ao_arch_critical(
+ while (!ao_dma_done[miso_dma_index])
+ ao_sleep(&ao_dma_done[miso_dma_index]);
+ );
+
+ while ((stm_spi->sr & (1 << STM_SPI_SR_TXE)) == 0);
+ while (stm_spi->sr & (1 << STM_SPI_SR_BSY));
+
+ validate_spi(stm_spi, which+1, len);
+
+ stm_spi->cr2 = 0;
+
+ ao_dma_done_transfer(mosi_dma_index);
+ ao_dma_done_transfer(miso_dma_index);
+}
+
void
ao_spi_send(const void *block, uint16_t len, uint8_t spi_index)
{
- struct stm_spi *stm_spi = ao_spi_stm_info[AO_SPI_INDEX(spi_index)].stm_spi;
- uint8_t mosi_dma_index = ao_spi_stm_info[AO_SPI_INDEX(spi_index)].mosi_dma_index;
- uint8_t miso_dma_index = ao_spi_stm_info[AO_SPI_INDEX(spi_index)].miso_dma_index;
+ uint8_t id = AO_SPI_INDEX(spi_index);
+ struct stm_spi *stm_spi = ao_spi_stm_info[id].stm_spi;
+ uint8_t mosi_dma_index = ao_spi_stm_info[id].mosi_dma_index;
+ uint8_t miso_dma_index = ao_spi_stm_info[id].miso_dma_index;
/* Set up the transmit DMA to deliver data */
ao_dma_set_transfer(mosi_dma_index,
(0 << STM_DMA_CCR_CIRC) |
(STM_DMA_CCR_DIR_MEM_TO_PER << STM_DMA_CCR_DIR));
- /* Clear RXNE */
- (void) stm_spi->dr;
-
/* Set up the receive DMA -- when this is done, we know the SPI unit
* is idle. Without this, we'd have to poll waiting for the BSY bit to
* be cleared
(0 << STM_DMA_CCR_PINC) |
(0 << STM_DMA_CCR_CIRC) |
(STM_DMA_CCR_DIR_PER_TO_MEM << STM_DMA_CCR_DIR));
- stm_spi->cr2 = ((0 << STM_SPI_CR2_TXEIE) |
- (0 << STM_SPI_CR2_RXNEIE) |
- (0 << STM_SPI_CR2_ERRIE) |
- (0 << STM_SPI_CR2_SSOE) |
- (1 << STM_SPI_CR2_TXDMAEN) |
- (1 << STM_SPI_CR2_RXDMAEN));
- ao_dma_start(miso_dma_index);
- ao_dma_start(mosi_dma_index);
- ao_arch_critical(
- while (!ao_dma_done[miso_dma_index])
- ao_sleep(&ao_dma_done[miso_dma_index]);
- );
- ao_dma_done_transfer(mosi_dma_index);
- ao_dma_done_transfer(miso_dma_index);
+
+ ao_spi_run(id, 1, len);
}
void
ao_spi_send_fixed(uint8_t value, uint16_t len, uint8_t spi_index)
{
- struct stm_spi *stm_spi = ao_spi_stm_info[AO_SPI_INDEX(spi_index)].stm_spi;
- uint8_t mosi_dma_index = ao_spi_stm_info[AO_SPI_INDEX(spi_index)].mosi_dma_index;
- uint8_t miso_dma_index = ao_spi_stm_info[AO_SPI_INDEX(spi_index)].miso_dma_index;
+ uint8_t id = AO_SPI_INDEX(spi_index);
+ struct stm_spi *stm_spi = ao_spi_stm_info[id].stm_spi;
+ uint8_t mosi_dma_index = ao_spi_stm_info[id].mosi_dma_index;
+ uint8_t miso_dma_index = ao_spi_stm_info[id].miso_dma_index;
/* Set up the transmit DMA to deliver data */
ao_dma_set_transfer(mosi_dma_index,
(0 << STM_DMA_CCR_CIRC) |
(STM_DMA_CCR_DIR_MEM_TO_PER << STM_DMA_CCR_DIR));
- /* Clear RXNE */
- (void) stm_spi->dr;
-
/* Set up the receive DMA -- when this is done, we know the SPI unit
* is idle. Without this, we'd have to poll waiting for the BSY bit to
* be cleared
(0 << STM_DMA_CCR_PINC) |
(0 << STM_DMA_CCR_CIRC) |
(STM_DMA_CCR_DIR_PER_TO_MEM << STM_DMA_CCR_DIR));
- stm_spi->cr2 = ((0 << STM_SPI_CR2_TXEIE) |
- (0 << STM_SPI_CR2_RXNEIE) |
- (0 << STM_SPI_CR2_ERRIE) |
- (0 << STM_SPI_CR2_SSOE) |
- (1 << STM_SPI_CR2_TXDMAEN) |
- (1 << STM_SPI_CR2_RXDMAEN));
- ao_dma_start(miso_dma_index);
- ao_dma_start(mosi_dma_index);
- ao_arch_critical(
- while (!ao_dma_done[miso_dma_index])
- ao_sleep(&ao_dma_done[miso_dma_index]);
- );
- ao_dma_done_transfer(mosi_dma_index);
- ao_dma_done_transfer(miso_dma_index);
+
+ ao_spi_run(id, 3, len);
}
void
ao_spi_send_sync(const void *block, uint16_t len, uint8_t spi_index)
{
- uint8_t *b = block;
- struct stm_spi *stm_spi = ao_spi_stm_info[AO_SPI_INDEX(spi_index)].stm_spi;
+ uint8_t id = AO_SPI_INDEX(spi_index);
+ const uint8_t *b = block;
+ struct stm_spi *stm_spi = ao_spi_stm_info[id].stm_spi;
stm_spi->cr2 = ((0 << STM_SPI_CR2_TXEIE) |
(0 << STM_SPI_CR2_RXNEIE) |
(0 << STM_SPI_CR2_SSOE) |
(0 << STM_SPI_CR2_TXDMAEN) |
(0 << STM_SPI_CR2_RXDMAEN));
-
- /* Clear RXNE */
- (void) stm_spi->dr;
-
+ validate_spi(stm_spi, 7, len);
while (len--) {
while (!(stm_spi->sr & (1 << STM_SPI_SR_TXE)));
stm_spi->dr = *b++;
}
+ while ((stm_spi->sr & (1 << STM_SPI_SR_TXE)) == 0)
+ ;
+ while (stm_spi->sr & (1 << STM_SPI_SR_BSY))
+ ;
+ /* Clear the OVR flag */
+ (void) stm_spi->dr;
+ (void) stm_spi->sr;
+ validate_spi(stm_spi, 8, len);
}
void
ao_spi_recv(void *block, uint16_t len, uint8_t spi_index)
{
- struct stm_spi *stm_spi = ao_spi_stm_info[AO_SPI_INDEX(spi_index)].stm_spi;
- uint8_t mosi_dma_index = ao_spi_stm_info[AO_SPI_INDEX(spi_index)].mosi_dma_index;
- uint8_t miso_dma_index = ao_spi_stm_info[AO_SPI_INDEX(spi_index)].miso_dma_index;
+ uint8_t id = AO_SPI_INDEX(spi_index);
+ struct stm_spi *stm_spi = ao_spi_stm_info[id].stm_spi;
+ uint8_t mosi_dma_index = ao_spi_stm_info[id].mosi_dma_index;
+ uint8_t miso_dma_index = ao_spi_stm_info[id].miso_dma_index;
spi_dev_null = 0xff;
(0 << STM_DMA_CCR_CIRC) |
(STM_DMA_CCR_DIR_MEM_TO_PER << STM_DMA_CCR_DIR));
- /* Clear RXNE */
- (void) stm_spi->dr;
-
/* Set up the receive DMA to capture data */
ao_dma_set_transfer(miso_dma_index,
&stm_spi->dr,
(0 << STM_DMA_CCR_CIRC) |
(STM_DMA_CCR_DIR_PER_TO_MEM << STM_DMA_CCR_DIR));
- stm_spi->cr2 = ((0 << STM_SPI_CR2_TXEIE) |
- (0 << STM_SPI_CR2_RXNEIE) |
- (0 << STM_SPI_CR2_ERRIE) |
- (0 << STM_SPI_CR2_SSOE) |
- (1 << STM_SPI_CR2_TXDMAEN) |
- (1 << STM_SPI_CR2_RXDMAEN));
- ao_dma_start(miso_dma_index);
- ao_dma_start(mosi_dma_index);
-
- /* Wait until the SPI unit is done */
- ao_arch_critical(
- while (!ao_dma_done[miso_dma_index])
- ao_sleep(&ao_dma_done[miso_dma_index]);
- );
-
- ao_dma_done_transfer(mosi_dma_index);
- ao_dma_done_transfer(miso_dma_index);
+ ao_spi_run(id, 9, len);
}
void
ao_spi_duplex(void *out, void *in, uint16_t len, uint8_t spi_index)
{
- struct stm_spi *stm_spi = ao_spi_stm_info[AO_SPI_INDEX(spi_index)].stm_spi;
- uint8_t mosi_dma_index = ao_spi_stm_info[AO_SPI_INDEX(spi_index)].mosi_dma_index;
- uint8_t miso_dma_index = ao_spi_stm_info[AO_SPI_INDEX(spi_index)].miso_dma_index;
+ uint8_t id = AO_SPI_INDEX(spi_index);
+ struct stm_spi *stm_spi = ao_spi_stm_info[id].stm_spi;
+ uint8_t mosi_dma_index = ao_spi_stm_info[id].mosi_dma_index;
+ uint8_t miso_dma_index = ao_spi_stm_info[id].miso_dma_index;
/* Set up transmit DMA to send data */
ao_dma_set_transfer(mosi_dma_index,
(0 << STM_DMA_CCR_CIRC) |
(STM_DMA_CCR_DIR_MEM_TO_PER << STM_DMA_CCR_DIR));
- /* Clear RXNE */
- (void) stm_spi->dr;
-
/* Set up the receive DMA to capture data */
ao_dma_set_transfer(miso_dma_index,
&stm_spi->dr,
(0 << STM_DMA_CCR_PINC) |
(0 << STM_DMA_CCR_CIRC) |
(STM_DMA_CCR_DIR_PER_TO_MEM << STM_DMA_CCR_DIR));
-
- stm_spi->cr2 = ((0 << STM_SPI_CR2_TXEIE) |
- (0 << STM_SPI_CR2_RXNEIE) |
- (0 << STM_SPI_CR2_ERRIE) |
- (0 << STM_SPI_CR2_SSOE) |
- (1 << STM_SPI_CR2_TXDMAEN) |
- (1 << STM_SPI_CR2_RXDMAEN));
- ao_dma_start(miso_dma_index);
- ao_dma_start(mosi_dma_index);
-
- /* Wait until the SPI unit is done */
- ao_arch_critical(
- while (!ao_dma_done[miso_dma_index])
- ao_sleep(&ao_dma_done[miso_dma_index]);
- );
-
- ao_dma_done_transfer(mosi_dma_index);
- ao_dma_done_transfer(miso_dma_index);
+ ao_spi_run(id, 11, len);
}
static void
{
uint8_t id = AO_SPI_INDEX(spi_index);
struct stm_spi *stm_spi = ao_spi_stm_info[id].stm_spi;
- stm_spi->cr1 = ((0 << STM_SPI_CR1_BIDIMODE) | /* Three wire mode */
- (0 << STM_SPI_CR1_BIDIOE) |
- (0 << STM_SPI_CR1_CRCEN) | /* CRC disabled */
- (0 << STM_SPI_CR1_CRCNEXT) |
- (0 << STM_SPI_CR1_DFF) |
- (0 << STM_SPI_CR1_RXONLY) |
- (1 << STM_SPI_CR1_SSM) | /* Software SS handling */
- (1 << STM_SPI_CR1_SSI) | /* ... */
- (0 << STM_SPI_CR1_LSBFIRST) | /* Big endian */
- (1 << STM_SPI_CR1_SPE) | /* Enable SPI unit */
- (speed << STM_SPI_CR1_BR) | /* baud rate to pclk/4 */
- (1 << STM_SPI_CR1_MSTR) |
- (0 << STM_SPI_CR1_CPOL) | /* Format 0 */
- (0 << STM_SPI_CR1_CPHA));
+
if (spi_index != ao_spi_index[id]) {
/* Disable old config
*/
ao_spi_index[id] = spi_index;
}
+ stm_spi->cr1 = ((0 << STM_SPI_CR1_BIDIMODE) | /* Three wire mode */
+ (0 << STM_SPI_CR1_BIDIOE) |
+ (0 << STM_SPI_CR1_CRCEN) | /* CRC disabled */
+ (0 << STM_SPI_CR1_CRCNEXT) |
+ (0 << STM_SPI_CR1_DFF) |
+ (0 << STM_SPI_CR1_RXONLY) |
+ (1 << STM_SPI_CR1_SSM) | /* Software SS handling */
+ (1 << STM_SPI_CR1_SSI) | /* ... */
+ (0 << STM_SPI_CR1_LSBFIRST) | /* Big endian */
+ (1 << STM_SPI_CR1_SPE) | /* Enable SPI unit */
+ (speed << STM_SPI_CR1_BR) | /* baud rate to pclk/4 */
+ (1 << STM_SPI_CR1_MSTR) |
+ (0 << STM_SPI_CR1_CPOL) | /* Format 0 */
+ (0 << STM_SPI_CR1_CPHA));
+ validate_spi(stm_spi, 13, 0);
}
uint8_t
ao_spi_get(uint8_t spi_index, uint32_t speed)
{
uint8_t id = AO_SPI_INDEX(spi_index);
+
ao_mutex_get(&ao_spi_mutex[id]);
ao_spi_config(spi_index, speed);
}
ao_spi_disable_index(spi_index);
stm_spi->cr1 = 0;
- (void) stm_spi->sr;
stm_spi->cr2 = ((0 << STM_SPI_CR2_TXEIE) |
(0 << STM_SPI_CR2_RXNEIE) |
(0 << STM_SPI_CR2_ERRIE) |
(0 << STM_SPI_CR2_SSOE) |
(0 << STM_SPI_CR2_TXDMAEN) |
(0 << STM_SPI_CR2_RXDMAEN));
+
+ /* Clear any pending data and error flags */
+ (void) stm_spi->dr;
+ (void) stm_spi->sr;
}
#if DEBUG
projects / fw / altos / blobdiff