ColdFire/68K Microcontrollers and ProcessorsのトピックRe: FlexCAN

FlexCAN

sharda — Sat, 16 May 2009 12:08:49 GMT

Dear all,

I am communicating between HCS12 & MCF52259 using CAN.I have checked communication between 2 HCs12 controllers & it is doing well.But when i use MCF5225,this controller does not nor receive any bytes.I am using only one message buffer.Is the problem due to the difference in MSCAN & FlexCAN.

Can anybody help me

Re: FlexCAN

sharda — Sat, 16 May 2009 19:32:10 GMT

Hi all,

i have found in the M52259DEMOCOM_UG.pdf document that i need to enable the CANT_EN option jumper but on the hardware i am unable to find any such jumper option.

Can anybody help me.....

Message Edited by sharda on 2009-05-16 01:32 PM

Re: FlexCAN

mjbcswitzerland — Sat, 16 May 2009 19:41:50 GMT

I think that the CANT_EN is a mistake in the user guide since this doesn't exist.

However this would enable and disable the CAN termination, which is not necessarily relevant for CAN functionality. The termination is always in the circuit (R12) and could be desoldered if absolutely necessary.

regards

Mark

www.uTasker.com

Re: FlexCAN

tamirci — Tue, 18 Jan 2011 03:08:26 GMT

Hi,

I m also trying to implement the same functionality; Can communication between MC9S12XDT512 and MCF52259. S12X board has MAX 3058 Can trainciever and MCF52259 board has SN65HVD232 3V3 can trainciever. I infact m familiar with can communication and already implemented many communication device that on the market now. But they were all based on S12X with 5V level. I attached my can bus devices.

I dont know what is the problem; I m checking loopback function of both boards and getting what i sent. I m using ignore all filter bits opinion for incoming messages. But when i try to communicate both device eachother S12X gets SYNC but when drive the bus by sending data SYNC gets lost. This goes continuosly.

3V3 can tranciever show 1V2 at CANL when it is not connected to the bus.

I m stick on this issue and staying late to the market. My target application is can to ethernet bridge. Any help?

Best regards,