AM2634-Q1: CAN Communication Support

Hello Swati,

Do you have CAN transceivers on both sides of this communication? And if so, which ones are being used?

Best Regards,

Ralph Jacobi

Hello Ralph Jacobi

Yes I have CAN Transceivers on both sides on AM2634 I am using In-Built Module TCAN1042 and on STM32 Side i am using  SN65HVD230


Best Regards
Swati Sharma

Hello Swati,

A few observations then...

1) SN65HVD230 doesn't indicate CAN FD support. I will need to confirm this and have a query out, but if so you are selecting CAN FD mode with a transceiver that can't support it.

Edit: Confirmed SN65HVD230 is not spec'd to support CAN FD high data rates, but in theory it could support 500kbps / 1Mbps. It's not designed for CAN FD though.

2) I don't know anything about the STM configuration process but for Texas Instruments "External Loopback" just means the signals are present on the I/O for measurement but it does not enable communication between devices.

3) You will want to adjust the SysConfig values to get the bitrates to align. For example:

Best Regards,

Ralph Jacobi

Hello Ralph Jacobi,

I try to test the CAN as you suggested but still it's not working.

And i thing i observe the AM2634 start transmission it get stuck on transmission(getting stuck in ISR function to get the value of transmission object) 

Hello Swati,

Do you have any ability to capture the bus traffic on the CAN lines? Hard to guess what might be occurring with that description but seeing the CAN bus should help make it clear which side of the transmission is having an issue.

Best Regards,

Ralph Jacobi

Hi Ralph,

Sorry for late reply,

I am waiting for my CANFD Transreceiver for this