how can I use CAN bus in TX2?

Robotics & Edge Computing Jetson Systems Jetson TX2
81

Hi Abraham,

I have also noticed that Jetson boots with Tx dominant (low) and it takes down the whole bus. One way to do this would be using a transceiver with silent mode and have it be silent during boot. This way the controller can’t speak to the bus.

82

We looked at the CAN TX line with a scope and noticed that the TX2 CAN hardware responding to the CAN messages on powerup before the modules were loaded. We believe this is causing the issues on the CAN Bus. We are using the ISO1050 isolated can transceiver and unfortunately it does not have the silent mode feature. I was hoping to find a way of doing something on the TX2 side to fix this issue.
Thanks

83

Inputs CAN0 RX and CAN1 RX are 5V tolerant? Or do you need level shifters?

84

Didn’t use level shifter. Not sure it actually puts out 5v on Rx. Check data sheet?

85

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The block diagram shows that the output RXD of TJA1050 (pin 4) will supply a voltage from 0 to Vcc to the input of the Jetson (pin CAN0 RX or CAN1 RX). Vcc is equal to 5V.

86

Dear Abraham

do you solved your Problem: "We looked at the CAN TX line with a scope and noticed that the TX2 CAN hardware responding to the CAN messages on powerup before the modules were loaded. We believe this is causing the issues on the CAN Bus. We are using the ISO1050 isolated can transceiver and unfortunately it does not have the silent mode feature. I was hoping to find a way of doing something on the TX2 side to fix this issue.
Thanks "

We are using the Jetson TX2 with Aetina 510 Carrier Board and we also have got the problem during bootup that the CAN BUS goes down. After booting the hole CAN BUS works fine.

Is there a solution on TX2 side we can solve the issue?

Regards and Thanks a lot!