topic Re: CAN-USB interfacing on HCS12 Microcontroller in S12 / MagniV Microcontrollers

CAN-USB interfacing on HCS12 Microcontroller

jagg — Thu, 14 Sep 2006 05:10:44 GMT

Hi,

Iam working on MC9S12DG256B(HCS12) microcontroller for CAN module. I've just used the Software in the App Note AN3034 to program the MSCAN. I've changed nothing in the software, but only deactivated loop back self test mode ( in CANCTL1 ). I am using CAN-USB interface.

But in the CAN0SendFrame() the Transmission completes never. The Code execution freezes
here:

CAN0TFLG = txbuffer; // Start transmission
while ( (CAN0TFLG & txbuffer) != txbuffer); // Wait for Transmission completion
I have no idea why!
i'll be thankful for your help!

Re: CAN-USB interfacing on HCS12 Microcontroller

Alban — Thu, 14 Sep 2006 05:38:22 GMT

Please before asking questions, search for existing answers.

This is the third time this question is asked in few weeks and has already been replied to twice.

See two posts below and you'll get an answer.

Alban.

Re: CAN-USB interfacing on HCS12 Microcontroller

wilero17 — Fri, 16 Oct 2009 00:10:39 GMT

Hi alban,

I have the same problem jagg. I want to know where are the post that you are saying.

Many thanks.

Re: CAN-USB interfacing on HCS12 Microcontroller

kef — Fri, 16 Oct 2009 01:53:30 GMT

It could be due to baudrate mismatch, lack of proper bus termination etc