MCU-PLUS-SDK-AM263X: Not getting output on MCAN0 using control card

Daniel Brown

I want to run two CAN buses using MCAN0 and MCAN1. As a preliminary step on the control card, I tried changing the MCAN instance in example.syscfg to MCAN0 in the example mcan_loopback_interrupt_am263x-cc_r5fss0-0_nortos_ti-arm-clang. I put a scope probe on MCAN0-TX HSEC pin 82 and when I start the program, the pin goes high and sits there. What else do I need to change to configure MCAN0?

over 2 years ago

0 Brennan Hartigan over 2 years ago

TI__Genius 10765 points

Daniel,

Only MCAN1 has an on-board CAN transceiver connected to the device pins. If you want to use MCAN0, you will need to connect a transceiver via the HSEC pins.

Regards,

Brennan

0 Daniel Brown over 2 years ago in reply to Brennan Hartigan

Prodigy 145 points

I know. But I expected some activity on an oscilloscope on the HSEC pins for mcan0. There's nothing. No logic level changes at all.

0 Punit Sharma over 2 years ago in reply to Daniel Brown

TI__Prodigy 160 points

Hi, Daniel. Have you added the MCAN0 instance in syscfg and relevant pinmux configuration.

0 Daniel Brown over 2 years ago in reply to Punit Sharma

Prodigy 145 points

Yes. My colleague tried isolating mcan1 from the CAN transceiver and found the same behavior. I think there's some signal error checking in the Sitara that isn't published. I'm guessing the software setup is fine.

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MCU-PLUS-SDK-AM263X: Not getting output on MCAN0 using control card