I'm using a NUCLEO-H563ZI and the STM32 HAL (generated by CubeMX) and there's no data (and no activity) on any of the SPI lines.
I'm using SPI2 and it is configured as follows:
static void MX_SPI2_Init(void)
{
/* USER CODE BEGIN SPI2_Init 0 */
/* USER CODE END SPI2_Init 0 */
/* USER CODE BEGIN SPI2_Init 1 */
/* USER CODE END SPI2_Init 1 */
/* SPI2 parameter configuration*/
hspi2.Instance = SPI2;
hspi2.Init.Mode = SPI_MODE_MASTER;
hspi2.Init.Direction = SPI_DIRECTION_2LINES;
hspi2.Init.DataSize = SPI_DATASIZE_32BIT;
hspi2.Init.CLKPolarity = SPI_POLARITY_LOW;
hspi2.Init.CLKPhase = SPI_PHASE_1EDGE;
hspi2.Init.NSS = SPI_NSS_HARD_INPUT;
hspi2.Init.BaudRatePrescaler = SPI_BAUDRATEPRESCALER_256;
hspi2.Init.FirstBit = SPI_FIRSTBIT_MSB;
hspi2.Init.TIMode = SPI_TIMODE_DISABLE;
hspi2.Init.CRCCalculation = SPI_CRCCALCULATION_DISABLE;
hspi2.Init.CRCPolynomial = 0x7;
hspi2.Init.NSSPMode = SPI_NSS_PULSE_ENABLE;
hspi2.Init.NSSPolarity = SPI_NSS_POLARITY_LOW;
hspi2.Init.FifoThreshold = SPI_FIFO_THRESHOLD_01DATA;
hspi2.Init.MasterSSIdleness = SPI_MASTER_SS_IDLENESS_00CYCLE;
hspi2.Init.MasterInterDataIdleness = SPI_MASTER_INTERDATA_IDLENESS_00CYCLE;
hspi2.Init.MasterReceiverAutoSusp = SPI_MASTER_RX_AUTOSUSP_DISABLE;
hspi2.Init.MasterKeepIOState = SPI_MASTER_KEEP_IO_STATE_DISABLE;
hspi2.Init.IOSwap = SPI_IO_SWAP_DISABLE;
hspi2.Init.ReadyMasterManagement = SPI_RDY_MASTER_MANAGEMENT_INTERNALLY;
hspi2.Init.ReadyPolarity = SPI_RDY_POLARITY_HIGH;
if (HAL_SPI_Init(&hspi2) != HAL_OK)
{
Error_Handler();
}
/* USER CODE BEGIN SPI2_Init 2 */
/* USER CODE END SPI2_Init 2 */
}
My function to send the data is:
uint32_t local_command;
// Some Code
my_status = HAL_SPI_Transmit(&hspi2, (uint8_t *)&local_command, sizeof(local_command), 100U);
my_status is returning as HAL_ERROR (and looking with a logic analyser there is no data on any of the SPI Lines).
Within HAL_SPI_Transmit() it is set to an error status on the following line(s).
/* Wait for Tx (and CRC) data to be sent */
if (SPI_WaitOnFlagUntilTimeout(hspi, SPI_FLAG_EOT, RESET, Timeout, tickstart) != HAL_OK)
{
SET_BIT(hspi->ErrorCode, HAL_SPI_ERROR_FLAG);
}
Obviously the "End of Tranmissio" flag is never being set (hence why it is timing out), but I've eneded up stuck of ideas of how to debug this any further.
Any suggestions/help?
My first error was that NSS was set to an input not an output:
I'm still getting nothing on the Data Lines though:
