STM32F103C8T6 CAN filter configulation EXTENDED and STANDART the same time

[Funky_Monkey99]

Hi!

I am using an STM32F103C8T6 mikrocontroller and i program with makefile and VsCode. I use the CAN on it and i need to work with STDID and a EXTID. On the bus there is dozens of standart CAN messages and sometime exteneded messages. From the standart ID-s i just need which identifier is 0x7C1 and next to that i need the all exteneded messages too. I would like to direct the standart messages in FiFo1 and the extened to FiFo0 (or inversely doesnt matter just one FiFO for the extened and other for the standart). I have created two canfilterconfig like this:

For the exntened:

  canfilterconfig_EXT.FilterActivation = CAN_FILTER_ENABLE;

  canfilterconfig_EXT.FilterBank = 0;  

  canfilterconfig_EXT.FilterFIFOAssignment = CAN_RX_FIFO0;

  canfilterconfig_EXT.FilterIdHigh = 0x00; 

  canfilterconfig_EXT.FilterIdLow = 0x04; // IDE bit

  canfilterconfig_EXT.FilterMaskIdHigh = 0x00; 

  canfilterconfig_EXT.FilterMaskIdLow = 0x04; // IDE bit

  canfilterconfig_EXT.FilterMode = CAN_FILTERMODE_IDMASK;

  canfilterconfig_EXT.FilterScale = CAN_FILTERSCALE_32BIT;

  canfilterconfig_EXT.SlaveStartFilterBank = 0;  //has no effect

 

For the standart:

 

  canfilterconfig_STD.FilterActivation = CAN_FILTER_ENABLE;

  canfilterconfig_STD.FilterBank = 1;

  canfilterconfig_STD.FilterFIFOAssignment = CAN_RX_FIFO1;

  canfilterconfig_STD.FilterIdHigh = 0x7C1<<5;

  canfilterconfig_STD.FilterIdLow = 0x0000;

  canfilterconfig_STD.FilterMaskIdHigh = 0xFFF<<5;

  canfilterconfig_STD.FilterMaskIdLow = 0x0000;

  canfilterconfig_STD.FilterMode = CAN_FILTERMODE_IDMASK;

  canfilterconfig_STD.FilterScale = CAN_FILTERSCALE_32BIT;

  canfilterconfig_STD.SlaveStartFilterBank = 0;  //has no effect

 

  if(HAL_CAN_ConfigFilter(&hcan, &canfilterconfig_STD) != HAL_OK)

  {

    Error_Handler();

  }

  if(HAL_CAN_ConfigFilter(&hcan, &canfilterconfig_EXT) != HAL_OK)

  {

    Error_Handler();

  }

 

I have tested it and the extened messages cause interrupt (so it works well) but the 0x7C1 standart ID message doesnt cause interrupt. I tried with ListMode, the 16bit mask mode but the met same problem with it. Can you guys have any guess?

Thanks in advance!

[Funky_Monkey99]

i think i figured out what was the problem. I have made a new project where i just use the CAN and the filter configulation.  I configured the FiFo 0 to catch just 0x7C1 is filter list mode just like that:

  CAN_FilterTypeDef canfilterconfig_FIFO0;

  canfilterconfig_FIFO0.FilterActivation = CAN_FILTER_ENABLE;

  canfilterconfig_FIFO0.FilterBank = 0;  

  canfilterconfig_FIFO0.FilterFIFOAssignment = CAN_RX_FIFO0;

  canfilterconfig_FIFO0.FilterIdHigh = 0x7C1<<5;

  canfilterconfig_FIFO0.FilterIdLow =0x0000;

  canfilterconfig_FIFO0.FilterMaskIdHigh = 0x7C1<<5;

  canfilterconfig_FIFO0.FilterMaskIdLow = 0x0000;

  canfilterconfig_FIFO0.FilterMode = CAN_FILTERMODE_IDLIST;

  canfilterconfig_FIFO0.FilterScale = CAN_FILTERSCALE_32BIT;

  canfilterconfig_FIFO0.SlaveStartFilterBank = 0;  //has no effect

  if(HAL_CAN_ConfigFilter(&hcan, &canfilterconfig_FIFO0) != HAL_OK)

  {

    Error_Handler();

  }

 

After that i configured FiFo1 for the extened ID-s (it is the same config in the question):

 

CAN_FilterTypeDef canfilterconfig_FIFO1;

  canfilterconfig_FIFO1.FilterActivation = CAN_FILTER_ENABLE;

  canfilterconfig_FIFO1.FilterBank = 1;  

  canfilterconfig_FIFO1.FilterFIFOAssignment = CAN_RX_FIFO1;

  canfilterconfig_FIFO1.FilterIdHigh = 0x0000;

  canfilterconfig_FIFO1.FilterIdLow = 0x04; // IDE bit

  canfilterconfig_FIFO1.FilterMaskIdHigh = 0x0000;

  canfilterconfig_FIFO1.FilterMaskIdLow = 0x04; // IDE bit

  canfilterconfig_FIFO1.FilterMode = CAN_FILTERMODE_IDMASK;

  canfilterconfig_FIFO1.FilterScale = CAN_FILTERSCALE_32BIT;

  canfilterconfig_FIFO1.SlaveStartFilterBank = 0;  //has no effect

  if(HAL_CAN_ConfigFilter(&hcan, &canfilterconfig_FIFO1) != HAL_OK)

  {

    Error_Handler();

  }

 

I tried with this and now it works well. My colleague and I think that because I have made an new project with this configulation it erased the whole mikrocontroller program from the STM32 so it erased the other filterbanks which i used at the begining of the project.  (maybe filterbank 10 I cant remembered well) Next to that I configured new filterbank which in the question (filterbank 1 and 2) but the filter bank 10 stayed in the configured. So because the filter bank 10 was set (and i forgetted that) it filtered the message. So I erased the whole program from the mikrocontroller and flashed again and now it works fine.