Use case: Full duplex transmission/reception in polling mode

Sequence diagram

Full duplex transmission/reception in polling mode

@startuml alt polling "Application" -> "SPI" : HAL_SPI_Transmit(&hspi1, aTxBuffer, DATA_TO_SEND, 500); "SPI" --> "Application" : <color #Green> HAL_OK "Application" -> "SPI" : HAL_SPI_Receive(&hspi1, aRxBuffer, DATA_TO_RECEIVE, 500); "SPI" --> "Application" : <color #Green> HAL_OK else "Application" -> "SPI" : HAL_SPI_TransmitReceive(&hspi1, (uint8_t *)aTxBuffer, (uint8_t *)aRxBuffer, BUFFERSIZE, 500); "SPI" --> "Application" : <color #Green> HAL_OK end @enduml

Code snippet

HAL1

HAL2 

#define DATA_TO_SEND   256
#define DATA_TO_RECEIVE DATA_TO_SEND
SPI_HandleTypeDef hspi1;

uint8_t aTxBuffer[] = "*** SPI communication based on Polling mode***"
uint8_t aRxBuffer[BUFFERSIZE]

HAL_SPI_Transmit(&hspi1, aTxBuffer, DATA_TO_SEND, 500);

HAL_SPI_Receive(&hspi1, aRxBuffer, DATA_TO_RECEIVE, 500);

HAL_SPI_TransmitReceive(&hspi1, (uint8_t *)aTxBuffer, (uint8_t *)aRxBuffer, BUFFERSIZE, 500);

#define DATA_TO_SEND   256
#define DATA_TO_RECEIVE DATA_TO_SEND
hal_spi_handle_t hspi1;
hal_spi_config_t spi_config;
uint8_t aTxBuffer[] = "*** SPI communication based on Polling mode***"
uint8_t aRxBuffer[BUFFERSIZE]

HAL_SPI_Transmit(&hspi1, (const void *)pTxData, DATA_TO_SEND, 500);

HAL_SPI_Receive(&hspi1,( void *)aRxBuffer, DATA_TO_RECEIVE, 500);

HAL_SPI_TransmitReceive(pSPI, pTxData, &RxBuffer, BUFFER_SIZE, 500);

Key changes

  1. HAL2 uses hal_spi_handle_t instead of SPI_HandleTypeDef.