diff options
Diffstat (limited to 'src/stm/ao_spi_stm.c')
| -rw-r--r-- | src/stm/ao_spi_stm.c | 51 |
1 files changed, 45 insertions, 6 deletions
diff --git a/src/stm/ao_spi_stm.c b/src/stm/ao_spi_stm.c index 56329c24..885af544 100644 --- a/src/stm/ao_spi_stm.c +++ b/src/stm/ao_spi_stm.c @@ -154,6 +154,28 @@ ao_spi_send_fixed(uint8_t value, uint16_t len, uint8_t spi_index) } void +ao_spi_send_sync(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; + + 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 RXNE */ + (void) stm_spi->dr; + + while (len--) { + while (!(stm_spi->sr & (1 << STM_SPI_SR_TXE))); + stm_spi->dr = *b++; + } +} + +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; @@ -356,13 +378,11 @@ ao_spi_enable_index(uint8_t spi_index) } } -void -ao_spi_get(uint8_t spi_index, uint32_t speed) +static void +ao_spi_config(uint8_t spi_index, uint32_t speed) { uint8_t id = AO_SPI_INDEX(spi_index); struct stm_spi *stm_spi = ao_spi_stm_info[id].stm_spi; - - ao_mutex_get(&ao_spi_mutex[id]); stm_spi->cr1 = ((0 << STM_SPI_CR1_BIDIMODE) | /* Three wire mode */ (0 << STM_SPI_CR1_BIDIOE) | (0 << STM_SPI_CR1_CRCEN) | /* CRC disabled */ @@ -378,7 +398,7 @@ ao_spi_get(uint8_t spi_index, uint32_t speed) (0 << STM_SPI_CR1_CPOL) | /* Format 0 */ (0 << STM_SPI_CR1_CPHA)); if (spi_index != ao_spi_index[id]) { - + /* Disable old config */ ao_spi_disable_index(ao_spi_index[id]); @@ -386,13 +406,32 @@ ao_spi_get(uint8_t spi_index, uint32_t speed) /* Enable new config */ ao_spi_enable_index(spi_index); - + /* Remember current config */ ao_spi_index[id] = spi_index; } } +uint8_t +ao_spi_try_get(uint8_t spi_index, uint32_t speed, uint8_t task_id) +{ + uint8_t id = AO_SPI_INDEX(spi_index); + + if (!ao_mutex_try(&ao_spi_mutex[id], task_id)) + return 0; + ao_spi_config(spi_index, speed); + return 1; +} + +void +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); +} + void ao_spi_put(uint8_t spi_index) { |