stm32f469i CAN Not Working

[mvp]

Hi all,

               I am trying to establish a CAN communication between stm32f469i and PC.  I have used Cube MX to generate CAN driver.  I am not getting any data from the stm32f469i. I have also attached code for the reference.

[MHoll.2]

Did You set the apropriet bitrate in CubeMX?

in MX_CAN2_Init() the settings are strange:

  hcan2.Instance = CAN2;
  hcan2.Init.Prescaler = 120;
  hcan2.Init.Mode = CAN_MODE_NORMAL;
  hcan2.Init.SyncJumpWidth = CAN_SJW_1TQ;
  hcan2.Init.TimeSeg1 = CAN_BS1_1TQ;
  hcan2.Init.TimeSeg2 = CAN_BS2_1TQ;

[mvp]

Hello,

              Thanks for your response. Yes the bit rate was configured as 125000 bps.

[MHoll.2 · Accepted solution]

This is not a setting that is recommended. The sample point is between Seg1 and Seg2, and should be at about 75% to 90% (CanOpen has normaly 87.5%). Please us a Can Bus timing calculator (for example http://www.bittiming.can-wiki.info/ ) to get better timing parameters.

Did you check with a oscilloscope if the STM32 is transmitting anything?

Wenn debugging your code, did it enter the error handler? if yes were?

[mvp]

Hi,

    Thanks for your valuable support. As you have suggested configured Seg1 and Seg2 from http://www.bittiming.can-wiki.info/

Now it is working Perfectly :

Also attached the updated code. Thank you once again .