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Asantos
Asantos
Associate III
August 14, 2019
Question

FDCAN Tx Interrupts

  • August 14, 2019
  • 2 replies
  • 4303 views

Hi,

I'm trying to configure STM32H7 and STM32G4 FDCANs to generate an ISR on transmit complete frame.

I call the functios to enable respective ISRs:

HAL_FDCAN_ActivateNotification(&hfdcan1, FDCAN_IT_TX_COMPLETE, 0);  

HAL_FDCAN_ActivateNotification(&hfdcan1, FDCAN_IT_TX_FIFO_EMPTY, 0);  

When a FDCAN frame is trasmited, only TxFifoEmptyCallback notify an interrupt, there's no call to TxBufferCompleteCallback.

What am I missing?

This topic has been closed for replies.

2 replies

TKrop
TKrop
Associate II
October 9, 2019

It appears you are missing the last parameter in ActivateNotification:

 * @param BufferIndexes Tx Buffer Indexes.
 * This parameter can be any combination of @arg FDCAN_Tx_location.
 * This parameter is ignored if ActiveITs does not include one of the following:
 * - FDCAN_IT_TX_COMPLETE
 * - FDCAN_IT_TX_ABORT_COMPLETE

0 is not a valid option in the `FDCAN_Tx_location` group.

MMint
MMint
Associate II
February 25, 2020

i'm having the same issue. if 0 isn't an acceptable third argument for (HAL_FDCAN_ActivateNotification(&hfdcan1, FDCAN_IT_TX_COMPLETE, 0), then what is? I can't find any information given on the task.

MMint
MMint
Associate II
February 25, 2020

After Digging endlessly through the HAL code, I figured it out.

to activate TX IT complete notifications :

 if (HAL_FDCAN_ActivateNotification(&hfdcan1, FDCAN_IT_TX_COMPLETE, FDCAN_TX_BUFFER0 | FDCAN_TX_BUFFER1 | FDCAN_TX_BUFFER2) != HAL_OK)

   {

   Error_Handler();

   }

//then the interrupt function

// Transmission Complete callback FDCAN_Tx_location

void HAL_FDCAN_TxBufferCompleteCallback(FDCAN_HandleTypeDef *hfdcan, uint32_t BufferIndexes)

  {

    HAL_GPIO_TogglePin(GPIOB, GPIO_PIN_7);

  }

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