Good evening,
I had a problem using the HAL_SPI_Receive () function with the SPI configured in SPI_DIRECTION_1LINE in 8 bits mode.
this function generated 16 dummy clock periods instead of 8.
the SPI was configured like this:
static void MX_SPI3_Init(void)
{
/* USER CODE BEGIN SPI3_Init 0 */
/* USER CODE END SPI3_Init 0 */
/* USER CODE BEGIN SPI3_Init 1 */
/* USER CODE END SPI3_Init 1 */
/* SPI3 parameter configuration*/
hspi3.Instance = SPI3;
hspi3.Init.Mode = SPI_MODE_MASTER;
hspi3.Init.Direction = SPI_DIRECTION_1LINE;
hspi3.Init.DataSize = SPI_DATASIZE_8BIT;
hspi3.Init.CLKPolarity = SPI_POLARITY_LOW;
hspi3.Init.CLKPhase = SPI_PHASE_2EDGE;
hspi3.Init.NSS = SPI_NSS_SOFT;
hspi3.Init.BaudRatePrescaler = SPI_BAUDRATEPRESCALER_256;
hspi3.Init.FirstBit = SPI_FIRSTBIT_MSB;
hspi3.Init.TIMode = SPI_TIMODE_DISABLE;
hspi3.Init.CRCCalculation = SPI_CRCCALCULATION_DISABLE;
hspi3.Init.CRCPolynomial = 7;
hspi3.Init.CRCLength = SPI_CRC_LENGTH_DATASIZE;
hspi3.Init.NSSPMode = SPI_NSS_PULSE_DISABLE;
if (HAL_SPI_Init(&hspi3) != HAL_OK)
{
Error_Handler();
}
/* USER CODE BEGIN SPI3_Init 2 */
/* USER CODE END SPI3_Init 2 */
}
with the function:
....
u8RxPointer = 0;
while (u8RxPointer < 8) {
HAL_SPI_Receive (&hspi3, &u8RxBuffer[u8RxPointer++], 1, SPI_TIMEOUT);
for (u16Counter=0; u16Counter < 100; u16Counter++);
}
....
I solved it modifying the HAL Library in this way:
I anticipated these lines of code...
/* Check the end of the transaction */
if (SPI_EndRxTransaction(hspi, Timeout, tickstart) != HAL_OK)
{
hspi->ErrorCode = HAL_SPI_ERROR_FLAG;
}
before this...
/* Receive data in 8 Bit mode */
if (hspi->Init.DataSize <= SPI_DATASIZE_8BIT)
{
.............
}
respect to the original.
has anyone had the same problem? is it a library bug?
Thanks
