DMA QSPI transmit and receive complete

Hello @Ehill.16​ ,

This QSPI DMA function is used for transmitting data: HAL_QSPI_Transmit_DMA(&QSPIHandle, aTxBuffer) != HAL_OK,

 if (HAL_QSPI_Transmit_DMA(&QSPIHandle, aTxBuffer) != HAL_OK)
 {
 Error_Handler();
 }
 
 step++;
 }
 break;
 
 case 3:
 if(TxCplt != 0)
 {
 TxCplt = 0;
 StatusMatch = 0;
 
 /* Configure automatic polling mode to wait for end of program ----- */ 
 QSPI_AutoPollingMemReady(&QSPIHandle);
 
 step++;
 }

Then, an interruption will be generated, and the HAL_QSPI_RxCpltCallback() function will be called:

void HAL_QSPI_RxCpltCallback(QSPI_HandleTypeDef *hqspi)
{
 RxCplt++;
}

Note that you should add the HAL_QSPI_RxCpltCallback() function in the main.c.

I recommend you to refer to the QSPI_ReadWrite_DMA example in the STM32CubeF7 MCU package and get inspired or re-use the available sections : STM32Cube_FW_F7_Vx.xx.x\Projects\STM32F769I_EVAL\Examples\QSPI\QSPI_ReadWrite_DMA

This example describes how to erase part of a QSPI memory, write data in DMA mode, read data in DMA mode.

I hope my answer is helpful.

Please select my answer as Best if it fully answered your question.

Imen

Hello @Ehill.16​ ,

1- You should add this condition: while (RxCplt ==0); because the read transaction take time. So, you need to make sure that the read transaction has been completed before checking if the memory is ready (automatic polling mode): QSPI_AutoPollingMemReady(&hqspi, HAL_QPSI_TIMEOUT_DEFAULT_VALUE);

uint8_t QspiReadDataDMA(uint32_t address, uint32_t size, uint8_t *pData) {
	QSPI_CommandTypeDef s_command;
	QSPI_AutoPollingTypeDef s_config;
 
	/* Initialize the read command */
	s_command.InstructionMode = QSPI_INSTRUCTION_1_LINE;
	s_command.Instruction = QUAD_INOUT_FAST_READ_CMD;
	s_command.AddressMode = QSPI_ADDRESS_4_LINES;
	s_command.AddressSize = QSPI_ADDRESS_24_BITS;
	s_command.Address = address;
	s_command.AlternateByteMode = QSPI_ALTERNATE_BYTES_NONE;
	s_command.AlternateBytes = 0;
	s_command.AlternateBytesSize = 0;
	s_command.DataMode = QSPI_DATA_4_LINES; // QSPI_DATA_4_LINES
	s_command.DummyCycles = 0;
	s_command.NbData = size;
	s_command.DdrMode = QSPI_DDR_MODE_DISABLE;
	s_command.DdrHoldHalfCycle = QSPI_DDR_HHC_ANALOG_DELAY;
	s_command.SIOOMode = QSPI_SIOO_INST_EVERY_CMD;
 
	/* Configure the command */
	printf("HAL_QSPI_Command\n");
	if (HAL_QSPI_Command(&hqspi, &s_command,
	HAL_QPSI_TIMEOUT_DEFAULT_VALUE) != HAL_OK) {
		printf("HAL_ERROR\n");
		return HAL_ERROR;
	}
 
	/* Reception of the data */
	printf("HAL_QSPI_Receive\n");
	if (HAL_QSPI_Receive_DMA(&hqspi, pData) != HAL_OK) {
		printf("HAL_ERROR\n"); // Timeout after 5000mS
		return HAL_ERROR;
	}
 
while (RxCplt ==0); // add this condition 
 
 /* Configure automatic polling mode to wait for end of program ----- */
 QSPI_AutoPollingMemReady(&hqspi, HAL_QPSI_TIMEOUT_DEFAULT_VALUE);
 
	return HAL_OK;
}

2 - Don't modify the HAL_QSPI_RxCpltCallback() function in the stm32f7xx_hal_qspi.c, you should add this function in the main.c :

void HAL_QSPI_RxCpltCallback(QSPI_HandleTypeDef *hqspi)
{
 RxCplt++;
}

I hope that is clear now for you.

Imen

Try to debug and localize where the code hangs/stop and the kind of message gives.

I suggest to start with the QSPI example available under STM32CubeF7 MCU package, to confirm if the problem here seems related to your hardware or software environment: STM32Cube_FW_F7_Vx.xx.x\Projects\STM32F769I_EVAL\Examples\QSPI\QSPI_ReadWrite_DMA

If the issue still exist, you can share you project code, to check your configuration setting.

Imen

I am seeing a 1.6 MB/s transfer rate for writing the QSPI flash using HAL_QSPI_Transmit_DMA, and 38.7 MB/s reading the QSPI flash using HAL_QSPI_Receive_DMA. This seems about right.

But I can't measure the transfer rate using HAL_QSPI_Transmit and HAL_QSPI_Receive because the HAL_QSPI_TxCpltCallback and HAL_QSPI_RxCpltCallback are not triggered.

What do I need to do to get the callbacks to work with HAL_QSPI_Transmit and HAL_QSPI_Receive ?