Posted on April 22, 2015 at 17:02Hi everyone,
I'm trying to program the SPI2 of my STM32 to only transmit data at 18Mbit/s as I saw on datasheet.
My problem is to configure the ''SPI_HandleTypeDef'' in order to use the function :
HAL_StatusTypeDef HAL_SPI_Transmit(SPI_HandleTypeDef *hspi, uint8_t *pData, uint16_t Size, uint32_t Timeout);
As I want to only transmit I don't know what to put into the following fields of the SPI_HandleTypeDef :
uint8_t *pTxBuffPtr; /* Pointer to SPI Tx transfer Buffer */
uint16_t TxXferSize; /* SPI Tx Transfer size */
uint16_t TxXferCount; /* SPI Tx Transfer Counter */
uint8_t *pRxBuffPtr; /* Pointer to SPI Rx transfer Buffer */
uint16_t RxXferSize; /* SPI Rx Transfer size */
uint16_t RxXferCount; /* SPI Rx Transfer Counter */
uint32_t CRCSize; /* SPI CRC size used for the transfer */
void (*RxISR)(struct __SPI_HandleTypeDef *hspi); /* function pointer on Rx IRQ handler */
void (*TxISR)(struct __SPI_HandleTypeDef *hspi); /* function pointer on Tx IRQ handler */
DMA_HandleTypeDef *hdmatx; /* SPI Tx DMA Handle parameters *
DMA_HandleTypeDef *hdmarx; /* SPI Rx DMA Handle parameters */
HAL_LockTypeDef Lock; /* Locking object */
HAL_SPI_StateTypeDef State; /* SPI communication state */
HAL_SPI_ErrorTypeDef ErrorCode; /* SPI Error code */
Here you have my main :
#include ''stm32f0xx.h''
#include ''system_stm32f0xx.h''
#include ''stm32f0xx_hal_rcc.h''
#include ''stm32f0xx_hal_spi.h''
int main(void)
{
/***** Variables *****/
uint32_t Freq_syst;
HAL_StatusTypeDef SPI_status;
SPI_HandleTypeDef SPI_handle;
SPI_InitTypeDef SPI_init_struct;
SPI_init_struct.BaudRatePrescaler = SPI_BAUDRATEPRESCALER_2;
SPI_init_struct.CLKPhase = SPI_POLARITY_LOW;
SPI_init_struct.CRCCalculation = SPI_CRCCALCULATION_DISABLED;
SPI_init_struct.DataSize = SPI_DATASIZE_16BIT;
SPI_init_struct.Direction = SPI_DIRECTION_1LINE;
SPI_init_struct.FirstBit = SPI_FIRSTBIT_LSB; //peut être mettre MSB first
SPI_init_struct.Mode = SPI_MODE_MASTER;
SPI_init_struct.NSS = SPI_NSS_SOFT;
SPI_init_struct.NSSPMode = SPI_NSS_PULSE_DISABLED;
SPI_init_struct.TIMode = SPI_TIMODE_ENABLED;
SPI_handle.Instance = SPI2;
SPI_handle.Init = SPI_init_struct;
while(1)
{
}
}
Thank you for your help,
