Using st link v3 to program over CAN

[Eben]

Good day,

I am attempting to program an STM32L5 MCU using an ST Link V3 over FDCAN. I am aware that on the breakout board for the ST Link V3 there is connector CN5 which has CAN RX and TX. On the microcontroller I have a CAN transceiver installed on pins PD0 and PD1. I am able to put the microcontroller in the bootloader mode, but when I attempt to connect using the following configuration

all I am met with is the error
22:56:39 : Error: ST-LINK error (BRG_CAN_ERR)
22:56:39 : Error: Establishing connection with the device failed

Do I have to use pins PB9 and PB8? If so, do they have to have a CAN transceiver installed on them? Am I doing something wrong in CubeProgrammer? Should I be using a different connector on the ST Link V3? Programming over UART was so easy I did not expect CAN to be anywhere near this difficult. Any assistance would be greatly appreciated as this is somewhat urgent. Thank you.

 

 

 

[Tesla DeLorean]

My expection is that you need a transceiver on the ST-LINK/V3 side also. Or use the diode method at both ends in lieu of the transceivers. 

[Eben]

Have you gotten this working with pins other than the ones specifically mentioned in the bootloader documentation?

 

[Amine_Jridi]

Hello @Eben,

Please check the steps in this article. If you still encounter any issues afterwards, feel free to reach out.

Thanks,

Amine.

[seongman]

Thanks for your answer Eben,
We've followed all instructions as you attached above and are able to observe CAN frame signals as below. But still we see BRG_CANERR message on STM32CubeProgrammer. So I am wondering if there is no workable CAN bootloader code in ROM or we need to send rst signal to STM chip (STM32L562) from STM32CubeProgrammer.

Thanks,
Seongman