STM32CubeIDE 1.7.0 code on STM32G0B1 CAN bus ID filter not working once using (HAL_FDCAN_ConfigGlobalFilter(&hfdcan1, FDCAN_REJECT, FDCAN_REJECT, FDCAN_FILTER_REMOTE, FDCAN_FILTER_REMOTE) .

[Jackle]

Classic CAN configuration as below. when the line "if(HAL_FDCAN_ConfigGlobalFilter(...))" is removed, the CAN messages are received without issue. The transmitted message is set as ID: 0x111 . Confirmed by a CAN bus monitor.

Configuration as below:

FDCAN_FilterTypeDef sFilterConfig;

sFilterConfig.IdType = FDCAN_STANDARD_ID;

sFilterConfig.FilterIndex = 0;

sFilterConfig.FilterType = FDCAN_FILTER_MASK;

sFilterConfig.FilterConfig = FDCAN_FILTER_TO_RXFIFO0;

sFilterConfig.FilterID1 = 0x111;

sFilterConfig.FilterID2 = 0x7FF;

  if(HAL_FDCAN_ConfigFilter(&hfdcan1, &sFilterConfig)!= HAL_OK)

{

Error_Handler();

}

// If comment this one, it works.

if(HAL_FDCAN_ConfigGlobalFilter(&hfdcan1, FDCAN_REJECT, FDCAN_REJECT, FDCAN_FILTER_REMOTE, FDCAN_FILTER_REMOTE) != HAL_OK)

{

Error_Handler();

}

if(HAL_FDCAN_Start(&hfdcan1) != HAL_OK)

{

Error_Handler();

}

[Jackle]

Please help.   ​ @Imen DAHMEN

[Imen.D]

Hello @Jackle​ ,

Which CubeG0 version are you using ?

Imen

[Jackle]

STM32Cube FW_G0 V1.5.0

STM32CubeIDE 1.7.0

[Imen.D]

Hi @Jackle​ ,

After check the code, the message ID responds to the filter, and it should be accepted and work.

Maybe the passed parameter to the function HAL_FDCAN_ConfigGlobalFilter are wrong.

The message matchs with the filter so the call of this function has no effect because it treats message in case that they don’t match with filters.

Did you try with other parameters in the function HAL_FDCAN_ConfigGlobalFilter ? try to replace FDCAN_REJECT with FDCAN_ACCEPT_IN_RX_FIFO0 ?

Imen

[Jackle]

Hi @Imen DAHMEN​ ,

This is exactly my point. The code seems no problem. But it's not working once I add

if(HAL_FDCAN_ConfigGlobalFilter(&hfdcan1, FDCAN_REJECT, FDCAN_REJECT, FDCAN_FILTER_REMOTE, FDCAN_FILTER_REMOTE) != HAL_OK)

{

Error_Handler();

}.

If I use FDCAN_ACCEPT_IN_RX_FIFO0 as parameter, I can receive the message.

But this is wrong. It means the message doesn't match with the ID.

Jackle

[Jackle · Accepted solution]

Mystery Solved! Need to change the default "Std Filters Nbr" setting from 0 to 1 or More.