Coldfire v1 mcf51cn128cgt TCP/IP communication problem

swapnilvhanale · ‎03-15-2018

Hello All,

I am Developing Serial to Ethernet converter using coldfire v1 mcf51cn128cgt. I have ported freertos with lwip stack.

lwip initialization done successfully. But Program stuck at sys_mbox_fetch() in tcp thread for forever and also ETHER_EN bit of Ethernet control Reg[ECR] get clear. And Ethernet low level Communication stops unexpectedly.

Is there any idea why this is happening, Waiting for good answers.

Regards,

Swapnil

swapnilvhanale · ‎03-20-2018

Dear All,

I just got solution on above problem, I just tried using system clock of 50MHz which was previously defined at 50331648Hz. And also code is made enabled for 100Mbps speed.

Thank you to reply this question; I just got solution from replied messages and Attached links.

Regards,

Swapnil

miduo · ‎03-20-2018

Hello, Swapnil

It is so happy to know that your got the solution. Cngratulations! Anything else you met for technical issue, please fell free to submit thread here.

TomE · ‎03-16-2018

You're using LwIP. You might be better off using something newer like FNET:

https://community.nxp.com/message/57196

There are lots of single-chip solutions you can buy that give you Ethernet to Serial (and lots more) without having to write any code at all. Is there a reason you're not using one of those and are writing your own?

Tom

TomE · ‎03-16-2018

We can't see your code so we can't make many suggestions. Don't try to post it unless you can come down with a very short and self-contained piece of code that demonstrates a problem. Ethernet is so complex this usually isn't possible.

Have you read the Reference Manual? It is quite clear on what can clear ECR[ETHER_EN] and what register you should check next. Then it is a matter of finding the bug that caused that.

Tom