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No response from CAN Bootloader -> STM32L496 (Nucleo)

Maximilian Pohl
Associate II

Hello,

i would like to do firmware upload via CAN bus on my STM32L496 (Nucleo) board.

According to the datasheet this chip support firmware update via CAN.

I have a working CAN setup, i am able to send and recieve CAN frames, so i think the hardware side is okay.

After reboot into bootloader (BOOT0 == high) i am not able to get any response from the bootloader. According to the AN3154 i tried a few commands without any response.

I am able to reach the bootloader via UART and USB without any problems.

are the any tips and tricks with that?

thanks

Max

1 ACCEPTED SOLUTION

Accepted Solutions
TDK
Guru

Verify the pins you're connected to are the CAN pins supported per AN2606. Initialize them as GPIO output and toggle to ensure the hardware connection is there. Verify clock settings.

If you feel a post has answered your question, please click "Accept as Solution".

View solution in original post

2 REPLIES 2
TDK
Guru

Verify the pins you're connected to are the CAN pins supported per AN2606. Initialize them as GPIO output and toggle to ensure the hardware connection is there. Verify clock settings.

If you feel a post has answered your question, please click "Accept as Solution".
Maximilian Pohl
Associate II

Hi, i am very sorry. I didn´t read the manual well, i forgot to enable the HSE ;( sorry for that

thanks very much for your quick help