ARMmbed
/
mbed-os
mirror of https://github.com/ARMmbed/mbed-os.git
1
0
Fork 0
Code Issues Projects Releases Wiki Activity

[STM32] spi_master_write - rely on HAL 

ASYNCH SPI transfer support has been added based on STM HAL services.
To have both ASYNCH and SYNCH work together, we're also moving the
write API to STM HAL instead of direct registers access.
pull/2888/head
Laurent MEUNIER 2016-09-29 09:18:37 +02:00 committed by Laurent MEUNIER
parent 0aeea4950c
commit 661b6adb93
1 changed files with 15 additions and 39 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

54
targets/TARGET_STM/stm_spi_api.c
View File

@ -333,42 +333,6 @@ static inline int ssp_writeable(spi_t *obj)
return status;
}
static inline void ssp_write(spi_t *obj, int value)
{
SPI_TypeDef *spi = SPI_INST(obj);
struct spi_s *spiobj = SPI_S(obj);
SPI_HandleTypeDef *handle = &(spiobj->handle);
while (!ssp_writeable(obj));
//spi->DR = (uint16_t)value;
if (handle->Init.DataSize == SPI_DATASIZE_8BIT) {
// Force 8-bit access to the data register
uint8_t *p_spi_dr = 0;
p_spi_dr = (uint8_t *) & (spi->DR);
*p_spi_dr = (uint8_t)value;
} else { // SPI_DATASIZE_16BIT
spi->DR = (uint16_t)value;
}
}
static inline int ssp_read(spi_t *obj)
{
SPI_TypeDef *spi = SPI_INST(obj);
struct spi_s *spiobj = SPI_S(obj);
SPI_HandleTypeDef *handle = &(spiobj->handle);
while (!ssp_readable(obj));
//return (int)spi->DR;
if (handle->Init.DataSize == SPI_DATASIZE_8BIT) {
// Force 8-bit access to the data register
uint8_t *p_spi_dr = 0;
p_spi_dr = (uint8_t *) & (spi->DR);
return (int)(*p_spi_dr);
} else {
return (int)spi->DR;
}
}
static inline int ssp_busy(spi_t *obj)
{
int status;
@ -380,8 +344,21 @@ static inline int ssp_busy(spi_t *obj)
int spi_master_write(spi_t *obj, int value)
{
ssp_write(obj, value);
return ssp_read(obj);
uint16_t size, Rx, ret;
struct spi_s *spiobj = SPI_S(obj);
SPI_HandleTypeDef *handle = &(spiobj->handle);
size = (handle->Init.DataSize == SPI_DATASIZE_16BIT) ? 2 : 1;
/* Use 10ms timeout */
ret = HAL_SPI_TransmitReceive(handle,(uint8_t*)&value,(uint8_t*)&Rx,size,10);
if(ret == HAL_OK) {
return Rx;
} else {
DEBUG_PRINTF("SPI inst=0x%8X ERROR in write\r\n", (int)handle->Instance);
return -1;
}
}
int spi_slave_receive(spi_t *obj)
@ -395,7 +372,6 @@ int spi_slave_read(spi_t *obj)
struct spi_s *spiobj = SPI_S(obj);
SPI_HandleTypeDef *handle = &(spiobj->handle);
while (!ssp_readable(obj));
//return (int)spi->DR;
if (handle->Init.DataSize == SPI_DATASIZE_8BIT) {
// Force 8-bit access to the data register
uint8_t *p_spi_dr = 0;