TDA4VM: MCU CAN0 can not work

wenlong lang

Part Number: TDA4VM

We use socket can driver under Linux to drive MCU can0, hardware pin is D29 and C29.This is the same as SK board.

we build one sd card image.

1,SK board,the image can let mcu can0 work normally.

2,also the same sd card image,insert our board,mcu can0 can not work normally,can test from PC,can not receive right frame.act as eror frame.

To hardware,we just modify the can transceiver,from TCAN1046 to TJA1044.

Besides,we also do below experiment:

Connect SD board TDA4 TXD and RXD to transceiver (on our own board), we can receive right can message from PC.(by the way,we use the same one sd card image)

So we doublt whether there is some difference between our board's TDA4 and SK board's TDA4 SOC.

But we check our bom,SOC is the same as SK's board.

Please help give some opinion how to debug this issue

Thanks

over 4 years ago

0 wenlong lang over 4 years ago

Prodigy 20 points

BTW， software baseline is 08.00.00.08

0 wenlong lang over 4 years ago

Prodigy 20 points

below is loopback test,seems ok:

root@j7-evm:~# ip link set can0 type can bitrate 5000000 fd off loopback on
root@j7-evm:~# ip link set can0 up
root@j7-evm:~# candump can0 &

root@j7-evm:~# cansend can0 143#AA
can0 143 [1] AA
can0 143 [1] AA

0 Karan Saxena over 4 years ago in reply to wenlong lang

TI__Guru* 78155 points

Hi,

The loopback works and the Tx or Rx doesn't work, this could be because of:

1. MCAN_TX and MCAN_RX signals are not pinmuxed correctly.

2. CAN transceiver is not configured correctly. Can you check your CAN transceiver configuration?

Regards

Karan

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TDA4VM: MCU CAN0 can not work