MSCAN communication for SKEAZ64MLH4

[ekta_rathod]

Hello,

I am trying to transmit the data over CAN bus for nxp controller (SKEAZ64MLH4) using Processor Expert auto-generated code in 'Codewarrior'. CAN lines are connected to the 'PEAK' CAN adapter and observing the output on an open source software 'BUSMASTER'. But output terminal is continuously giving bus error messages.

Also Interrupt for TX is not getting generated as it is not coming in TX ISR. I am unable to figure out the problem with the CAN transmission.

Code has been attached here. Please help me out to resolve this issue.

Regards,

Ekta Rathod

[ekta_rathod]

Hello,

As mentioned above, I tried to transmit and receive CAN data on custom board. TJA1040 CAN transceiver is used.

While transmission or reception, voltage level on CAN Bus is as expected (CANH - 3.2V, CANL - 1.8V) but unable to observe data on BUSMASTER using Kvaser or PEAK Adapter.

Please check the attached code and suggest me if I did anything wrong.

Regards,

Ekta

[Alexis_A]

Hello @ekta_rathod ,

Overall your code looks good, so I'm wondering if the receiver your using is configurated correctly. I will suggest trying sending messages to the receiver to confirm if any type of communication is being done correctly.

Best Regards,

Alexis Andalon

[ekta_rathod]

Sir, I am using custom board. 

Okay I will try to test it using loop back mode

Thanks.

[ekta_rathod]

Which pin need to be initialized?

CAN init is done as shown in attached images and CAN transceiver is in active mode

[Alexis_A]

Hello Ekta,

Looking at your code closely I see that you already set the tx/rx pin. Are you using one of our development boards to test this or is it a custom board? 

Also, only to check if the module is working correctly, you could try using the loop mode to test the functionality. 

Best Regards,

Alexis Andalon

[Alexis_A]

Hello ekta.rathod@deviseelectronics.com‌,

In the main code I didn't see the Pin initialization function, are you initializing this in other places?

Best Regards,

Alexis Andalon