ISO1042: CAN bus accidentally swapped TX and RX is it possible to solve (in firmware) without board rework

HARI T O1

Expert 1265 points

Part Number: ISO1042

Tool/software:

Hi Team,

I am interfacing an isolated can transceiver with my microcontroller. My schematic is given below.

Accidently TXD is connected to RXD of microcontroller and RXD is connected to TXD of the microcontroller.

My question can I solve this issue without any rework in the board?

May I know firmware persons can help us by doing some changes in thier code and making this interface up.

Regards

HARI

1 month ago

0 Clemens Ladisch 1 month ago

Guru 257700 points

Pins 2 and 3 of the ISO1042 are hardcoded as input and output.

I doubt that you will be able to find help for an NXP microcontroller in a TI forum.

0 HARI T O1 1 month ago in reply to Clemens Ladisch

Expert 1265 points

I would like to know your opinion can we swap TX and RX in microcontroller side

0 Clemens Ladisch 1 month ago in reply to HARI T O1

Guru 257700 points

The microcontroller does not care about my opinion. Look into the reference manual how to assign pins, but I doubt than you can exchange CAN1_RX and CAN1_TX.

0 HARI T O1 1 month ago in reply to Clemens Ladisch

Expert 1265 points

Thank you...

Checked with NXP it is not possible to change

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ISO1042: CAN bus accidentally swapped TX and RX is it possible to solve (in firmware) without board rework