topic Re: twr-60F120M FlexCan CAN 0 question in Kinetis Microcontrollers

twr-60F120M FlexCan CAN 0 question

randalljordan — Mon, 04 May 2015 20:31:55 GMT

I am using a twr-60F120M board for development, with Code Warrior 10.6 and MQX 4.1.1. I would like to use CAN 0 and pick up the TX and RX signals on J21 and J22 and route them through an CAN expansion card that we use so I can write the CAN data to flash memory. My problem is that I can not seem to get the CAN 0 to operate. I can successfully communicate on CAN 1 using the tower serial board CAN and MQX FlexCan, but when I change the CAN device to CAN 0 I don't see the TX pin toggling on J21 when a write occurs. Is there a port setting I am missing? I was hopping that setting MQX FlexCan_Initialize to CAN 0 would set all the necessary port pins.

Thanks in advance for any help.

Re: twr-60F120M FlexCan CAN 0 question

soledad — Tue, 05 May 2015 21:32:03 GMT

Hello Randall,

Did you test using the CAN example located at the path C:\Freescale\Freescale_MQX_4_1\mqx\examples\can\flexcan\build\cw10gcc ???

Could you please share the code you are using??

Have a great day,
Sol

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Re: twr-60F120M FlexCan CAN 0 question

randalljordan — Wed, 06 May 2015 00:03:40 GMT

Soledad,

Yes, I tried the example hoping it was my code, but the example had the same result. Using the example or my setup, when the “CAN_DEVICE” is set to 1, I can see the data being sent on a scope (J7A B41). When I set “CAN_DEVICE” to 0 I don’t see anything on the scope (J21 pin 1).

I’ve attached the can source and header file for my CAN setup.

Thank you for your help

Randall Jordan

Re: Re: twr-60F120M FlexCan CAN 0 question

randalljordan — Wed, 06 May 2015 00:07:40 GMT

Soledad,

Thanks for your help

Re: twr-60F120M FlexCan CAN 0 question

randalljordan — Thu, 11 Jun 2015 15:25:33 GMT

The new custom board arrived and the CAN 0 operated normally. As I have the custom board I've tossed the TWR60F to the side, I suspect it has an issue.