ColdFire/68K Microcontrollers and ProcessorsのトピックRe: MCF5235EVB OpenTCP

MCF5235EVB OpenTCP

coolkiffings — Tue, 31 Aug 2010 18:49:51 GMT

Hi, I'm quit new in this mc's stuff,

but i have to implement a client/server application with the evb. I'm trying to calculate something on the EVB and send the result back to my hostpc.

I'm using the udp protocol and the opentcp stack, which i've downloaded from the freescale page (for 5235bcc evb)

I've adapted the main.c a bit. I cut all the stuff for http server or telnet or something like this. Theres only the

    init_timerpool();
   arpinit();
   udp_init();

initialization.

I've attached the main.c.

The problem is, that it doesn't send anything to my hostpc, where i've written a small server application.

Hope someone can help me

Sorry for my bad english, I'm from germany.

Re: MCF5235EVB OpenTCP

coolkiffings — Wed, 01 Sep 2010 16:15:33 GMT

Hm, I can't edit my post.

So I write a reply.

first i think, that it isn't the main function, i get into an infinite loop while hardware initialization...

but i don't know why..so if nobody knows whats wrong i could use an other stack too

Does anybody have ported the InterNiche TCP stack to that board?

Re: MCF5235EVB OpenTCP

vier_kuifjes — Wed, 01 Sep 2010 16:44:00 GMT

Hi,

I have some experience with Interniche Lite, but not with that board.

Interniche Lite (= Coldfire Lite) is not without issues though. Currently the main issue is that it is not compatible with Codewarrior 7.2.x. If you want to start using it, you'll need Codewarrior 7.1.x.

I would suggest you read my page with comments on Coldfire Lite here:

http://www.mvdh.be/cf_lite_patched.html

Re: MCF5235EVB OpenTCP

coolkiffings — Wed, 01 Sep 2010 17:45:39 GMT

Ah, thank you.

I've downloaded your 7.2 Stack. I hope I can port it to the board.

The problem is, that I'm really new in this topic..so I don't have any clue how to port it

to another board. Do I have to change the MCF5235EVB_sysinit to activate the ethernet port?

Or what I have to do?

Re: MCF5235EVB OpenTCP

vier_kuifjes — Wed, 01 Sep 2010 18:11:42 GMT

It is possible there already is a port for the 5235, but I may have removed it from my modified version. I'll have to check that.

It's not very difficult to write an application that receives messages over UDP and sends a response in return. I have done this already myself. If you wish I can give you some of the code.

Re: MCF5235EVB OpenTCP

coolkiffings — Wed, 01 Sep 2010 18:15:52 GMT

Yes, that would be great if you can send it to me

That would help me a lot. It's not hard to port to another board?

Hm, ok.. I'm working with the board since 2 weeks

Re: MCF5235EVB OpenTCP

vier_kuifjes — Wed, 01 Sep 2010 18:27:54 GMT

Hmmm... apparently there's no port for the 5235 CPU in the original coldfire lite. This may complicate things a bit. Porting should be possible but I think it will be quite a bit of work.

Available ports are:

5208

5223x

52259

5275

5282

53013

5329

54455

Re: MCF5235EVB OpenTCP

coolkiffings — Wed, 01 Sep 2010 18:35:09 GMT

yes..i've downloaded the original version from freescale, and there wasn't any port to the board

now i don't know how i have to port it..

Re: MCF5235EVB OpenTCP

vier_kuifjes — Wed, 01 Sep 2010 19:22:30 GMT

Maybe start by finding a supported CPU which matches the 5235 best. There's a subfolder src\cpu\... containing all cpu dependent code and definitions. It might be a good idea to start checking these files out...

Re: MCF5235EVB OpenTCP

coolkiffings — Wed, 01 Sep 2010 19:24:27 GMT

and what do i have to check there?

if the registers are the same or what do i have to do?

Re: MCF5235EVB OpenTCP

vier_kuifjes — Wed, 01 Sep 2010 19:34:14 GMT

The header files contain definitions of CPU internal registers. There may be some that exist in other CPUs but not in the 5235, Or there may be some that exist in the 5235 but not in other CPUs. Or they may be some that exist in multiple CPU types but located at different addresses.

Looks like it will be quite a bit of work...

Re: MCF5235EVB OpenTCP

coolkiffings — Wed, 01 Sep 2010 20:03:04 GMT

I've got some headerfiles from the opentcp project for the 5235evb board..can i replace them in the interniche stack?

should this work?

I've attached them in this post.

Re: MCF5235EVB OpenTCP

vier_kuifjes — Wed, 01 Sep 2010 20:07:05 GMT

They look very similar, but I don't think simply replacing them will do the trick. That would be too easy...

Re: MCF5235EVB OpenTCP

coolkiffings — Wed, 01 Sep 2010 20:16:53 GMT

yes they are very similiar. they come from the here.

couldn't it be so easy ?

I think tomorrow i will test it. But what could i do else? check every header file and adapt it to the board?

Re: MCF5235EVB OpenTCP

vier_kuifjes — Wed, 01 Sep 2010 22:16:03 GMT

You will also have to check the initialisation routines I guess...

Re: MCF5235EVB OpenTCP

vier_kuifjes — Wed, 01 Sep 2010 22:18:30 GMT

By the way... have you checked the MQX operating system? It's more modern and should be easy to program. But I don't know if there is a port to the 5235 CPU.

Re: MCF5235EVB OpenTCP

mjbcswitzerland — Thu, 02 Sep 2010 04:43:17 GMT

Hi Coolkiffins / Marc

It is strange to see OpenTCP linked with the M5235 since OpenTCP was intended for small processors (8/16bits) like the MC9S12NE64. It was a simple open-source project about 7 years ago with limited features which was not developed in any way.

I have seen that MQX is available on the M520X to Alpha customers but the M5235 seems to have a different register layout so will presumably require some extra work too.

It seems to me that ucLinux (this is often delivered with these types of boards) may be the best choice when ample SDRAM is available. This type of processor is used more in less price-sensitive projects where memory is less of a premium and often 32MByte+ space is available.

I would like to be able to suggest also the uTasker project (this does now include M5214, M5216, M5280, M5281, M5282, M5207 and M5208 on top of the V2 MCU line) but there is no M5235 support since it has never been requested. It is now finding its way into more of the V2 MPU based projects but mainly (but not exclusively) as web enabled loader to a more heavy-weight application (such as ucLinux...).

Regards

Mark

www.uTasker.com

P.S. Eigentlich schade, dass der M523X nicht dabei ist, denn wir hätten auch Support auf Deutsch gehabt...

Re: MCF5235EVB OpenTCP

coolkiffings — Thu, 02 Sep 2010 14:22:51 GMT

Hi,

No I don't want to use the MQX because the board should run without an RTOS,

it should be designed for testing some modules. So I flash the board with a multiply function in example.

The board calculates it and sends the result back with some CUnit informations..

I think my project is to small to use uTasker efficiently..I only need a leightweight TCP stack, for sending

a message via UDP to my host.

Re: MCF5235EVB OpenTCP

mjbcswitzerland — Fri, 03 Sep 2010 02:23:47 GMT

If you only run projects with a few lines of code would it not be better to use a single-chip one? Like M5223X, with integrated PHY?

This would make SW and developing much easier and HW much cheaper. Also it would probably be easier to find suitable SW for it.

You'll not be able to find TCP/IP packages without TCP and a few other features but anything not required can usually be simply removed by a define - leaving the Ethernet driver, ARP, IP and UDP.

Regards

Mark

Re: MCF5235EVB OpenTCP

vier_kuifjes — Fri, 03 Sep 2010 02:43:07 GMT

I too was thinking that using the 5235 CPU may be overkill for what you want to do with it. If receiving and transmitting in UDP packet is the only thing you will need to do, a "single chipper" may be all you need for a much lower price. Why not consider buying a 52259DEMOKIT, it's really cheap, and runs uTasker or Coldfire lite without problems.