Question
STM32MP157C-DK2 - FDCAN not transmitting.
Hello,
I'm using a ST32MP157C-DK2 board to develop an application running on CM4 that basically handles a CAN Standard communication.
I routed the FDCAN1 signals on PA11 and PA12 and I am trying to send out some random data with no result...
Here is my code:
static void MX_FDCAN1_Init(void)
{
/* USER CODE BEGIN FDCAN1_Init 0 */
/* USER CODE END FDCAN1_Init 0 */
/* USER CODE BEGIN FDCAN1_Init 1 */
/* USER CODE END FDCAN1_Init 1 */
hfdcan1.Instance = FDCAN1;
hfdcan1.Init.FrameFormat = FDCAN_FRAME_CLASSIC;
hfdcan1.Init.Mode = FDCAN_MODE_NORMAL;
hfdcan1.Init.AutoRetransmission = DISABLE;
hfdcan1.Init.TransmitPause = DISABLE;
hfdcan1.Init.ProtocolException = DISABLE;
hfdcan1.Init.NominalPrescaler = 1;
hfdcan1.Init.NominalSyncJumpWidth = 1;
hfdcan1.Init.NominalTimeSeg1 = 2;
hfdcan1.Init.NominalTimeSeg2 = 2;
hfdcan1.Init.DataPrescaler = 1;
hfdcan1.Init.DataSyncJumpWidth = 1;
hfdcan1.Init.DataTimeSeg1 = 1;
hfdcan1.Init.DataTimeSeg2 = 1;
hfdcan1.Init.MessageRAMOffset = 0;
hfdcan1.Init.StdFiltersNbr = 0;
hfdcan1.Init.ExtFiltersNbr = 0;
hfdcan1.Init.RxFifo0ElmtsNbr = 1;
hfdcan1.Init.RxFifo0ElmtSize = FDCAN_DATA_BYTES_8;
hfdcan1.Init.RxFifo1ElmtsNbr = 0;
hfdcan1.Init.RxFifo1ElmtSize = FDCAN_DATA_BYTES_8;
hfdcan1.Init.RxBuffersNbr = 0;
hfdcan1.Init.RxBufferSize = FDCAN_DATA_BYTES_8;
hfdcan1.Init.TxEventsNbr = 1;
hfdcan1.Init.TxBuffersNbr = 8;
hfdcan1.Init.TxFifoQueueElmtsNbr = 8;
hfdcan1.Init.TxFifoQueueMode = FDCAN_TX_FIFO_OPERATION;
hfdcan1.Init.TxElmtSize = FDCAN_DATA_BYTES_8;
if (HAL_FDCAN_Init(&hfdcan1) != HAL_OK)
{
Error_Handler();
}
/* USER CODE BEGIN FDCAN1_Init 2 */
/* USER CODE END FDCAN1_Init 2 */
}
int main(void)
{
/* USER CODE BEGIN 1 */
uint32_t Tickstart;
/* USER CODE END 1 */
/* MCU Configuration--------------------------------------------------------*/
/* Reset of all peripherals, Initializes the Flash interface and the Systick. */
HAL_Init();
/* USER CODE BEGIN Init */
/* USER CODE END Init */
if(IS_ENGINEERING_BOOT_MODE())
{
/* Configure the system clock */
SystemClock_Config();
}
if(IS_ENGINEERING_BOOT_MODE())
{
/* Configure the peripherals common clocks */
PeriphCommonClock_Config();
}
/* IPCC initialisation */
MX_IPCC_Init();
/* OpenAmp initialisation ---------------------------------*/
MX_OPENAMP_Init(RPMSG_REMOTE, NULL);
/* USER CODE BEGIN SysInit */
/* USER CODE END SysInit */
/* Initialize all configured peripherals */
MX_GPIO_Init();
MX_FDCAN1_Init();
/* USER CODE BEGIN 2 */
/*##-2 Start FDCAN controller (continuous listening CAN bus) ##############*/
if (HAL_FDCAN_Start(&hfdcan1) != HAL_OK)
{
Error_Handler();
}
/*##-3 Transmit messages ##################################################*/
/* Add message to Tx FIFO */
TxHeader.Identifier = 0x444;
TxHeader.IdType = FDCAN_STANDARD_ID;
TxHeader.TxFrameType = FDCAN_DATA_FRAME;
TxHeader.DataLength = FDCAN_DLC_BYTES_8;
TxHeader.ErrorStateIndicator = FDCAN_ESI_ACTIVE;
TxHeader.BitRateSwitch = FDCAN_BRS_OFF;
TxHeader.FDFormat = FDCAN_CLASSIC_CAN;
TxHeader.TxEventFifoControl = FDCAN_NO_TX_EVENTS;
TxHeader.MessageMarker = 0;
if (HAL_FDCAN_AddMessageToTxFifoQ(&hfdcan1, &TxHeader, TxData0) != HAL_OK)
{
Error_Handler();
}
/* Get tick */
Tickstart = HAL_GetTick();
/* Check transmission occurred before timeout */
while(HAL_FDCAN_IsTxBufferMessagePending(&hfdcan1, FDCAN_TX_BUFFER0 ) != 0)
{
if((HAL_GetTick() - Tickstart) > TX_FAST_TIMEOUT)
{
Error_Handler();
break;
}
}
/* USER CODE END 2 */
/* Infinite loop */
/* USER CODE BEGIN WHILE */
while (1)
{
HAL_Delay(100);
/* USER CODE END WHILE */
/* USER CODE BEGIN 3 */
}
/* USER CODE END 3 */
}void HAL_FDCAN_MspInit(FDCAN_HandleTypeDef* hfdcan)
{
GPIO_InitTypeDef GPIO_InitStruct = {0};
RCC_PeriphCLKInitTypeDef PeriphClkInit = {0};
if(hfdcan->Instance==FDCAN1)
{
/* USER CODE BEGIN FDCAN1_MspInit 0 */
/* USER CODE END FDCAN1_MspInit 0 */
if(IS_ENGINEERING_BOOT_MODE())
{
/** Initializes the peripherals clock
*/
PeriphClkInit.PeriphClockSelection = RCC_PERIPHCLK_FDCAN;
PeriphClkInit.FdcanClockSelection = RCC_FDCANCLKSOURCE_HSE;
if (HAL_RCCEx_PeriphCLKConfig(&PeriphClkInit) != HAL_OK)
{
Error_Handler();
}
}
/* Peripheral clock enable */
__HAL_RCC_FDCAN_CLK_ENABLE();
__HAL_RCC_GPIOA_CLK_ENABLE();
/**FDCAN1 GPIO Configuration
PA11 ------> FDCAN1_RX
PA12 ------> FDCAN1_TX
*/
GPIO_InitStruct.Pin = GPIO_PIN_11;
GPIO_InitStruct.Mode = GPIO_MODE_AF;
GPIO_InitStruct.Pull = GPIO_NOPULL;
GPIO_InitStruct.Alternate = GPIO_AF9_FDCAN1;
HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);
GPIO_InitStruct.Pin = GPIO_PIN_12;
GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
GPIO_InitStruct.Pull = GPIO_NOPULL;
GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;
GPIO_InitStruct.Alternate = GPIO_AF9_FDCAN1;
HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);
/* USER CODE BEGIN FDCAN1_MspInit 1 */
/* USER CODE END FDCAN1_MspInit 1 */
}
}Any idea? What am I doing wrong?
Thank you!
Andrea