No response from CAN Bootloader -> STM32L496 (Nucleo)

[Maximilian Pohl]

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

[TDK · Accepted solution]

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.

[Maximilian Pohl]

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