HAL_SPI_TransmitReceive_DMA read before write HiI'm using the HAL_SPI_TransmitReceive_DMA to write to an external Flash. On a delte command for the external flash I need to wait for until the busy flag of the flash is zero. So I use this function to check the busy flag. spi_read(&command, sizeof (command), &SPI_RX_BUFFER, 2);
if ((SPI_RX_BUFFER[1] & 1) == 0)
return true;
else
return false;void spi_read(const void *txdata, size_t txsize, void *rxdata, size_t rxsize)
{
HAL_GPIO_WritePin(Flash_NSS_GPIO_Port, Flash_NSS_Pin, GPIO_PIN_RESET);
//reset the TX_RX complete Indication
SPI_TXRX_Complete (true, false);
SPI_TXRX_Status_Complete (true, false);
HAL_SPI_TransmitReceive_DMA (&hspi3, (uint8_t *)txdata, (uint8_t *)rxdata, rxsize);
}The problem is, that the RX of the DMA is not ready when I check the busy flag:SPI_RX_BUFFER[1] & 1How can I fix this issue?
