topic use printf for mc51jm128 in CodeWarrior for MCU

use printf for mc51jm128

MWMinor — Wed, 27 Jul 2016 20:45:24 GMT

I want to use the printf function to send characters through the UART connections on PTE0_TXD1.

At the moment I cant use the printf() function to print a simple string to the console. So I think I must be doing something very wrong.

I am using Processor Expert and Codewarrior10.6

Can anyone help me please..?

Thanks

Ken

Re: use printf for mc51jm128

BlackNight — Thu, 28 Jul 2016 05:42:31 GMT

Hi Ken,

in Embedded Systems and the microcontrolle world, you really should not use printf(): it is simply not a good thing, see https://mcuoneclipse.com/2013/04/19/why-i-dont-like-printf/ .

But it is really up to you if you know the consequences. If you insist using it, here are a few articles which should help you:

https://mcuoneclipse.com/2013/02/07/tutorial-printf-with-and-without-processor-expert/

https://mcuoneclipse.com/2013/04/17/printf-with-the-frdm-kl25z-board-and-without-processor-expert/

https://mcuoneclipse.com/2012/10/14/tutorial-printf-and-hello-world-with-the-freedom-kl25z-board/

I hope this helps,

Erich

Re: use printf for mc51jm128

ZhangJennie — Thu, 28 Jul 2016 06:17:52 GMT

in addition, I ever made printf demo code on 51JM128 demo board with CW10.1 and CW6.3 separately. see attached. hope this helps.

Have a great day,
Jennie Zhang

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Re: use printf for mc51jm128

MWMinor — Mon, 01 Aug 2016 07:03:48 GMT

Hi Jennie

Many thanks for your suggestion, but I couldn't find an attachment. Could you please send them...?

Thanks

Ken

Re: use printf for mc51jm128

ZhangJennie — Mon, 01 Aug 2016 08:51:46 GMT

HI Ken.

I have uploaded them to this thread, can't you see them?

if it's invisible on your side, please send me your email address, I can send them to via email.

Have a great day,
Jennie Zhang

Re: use printf for mc51jm128

MWMinor — Mon, 01 Aug 2016 15:09:23 GMT

Hi Jenny

Thanks, I have seen them. It looks like they are set to drive the TXD1 & RXD1 channel. What changes do I need to me to use the TXD2 & RXD2 pins...?

Thanks for your support

Ken

Re: use printf for mc51jm128

ZhangJennie — Fri, 05 Aug 2016 07:06:38 GMT

the feature of SCI1 and SCI2 are the same.

please refer MCF51JM128 reference manual

http://www.nxp.com/files/32bit/doc/ref_manual/MCF51JM128RM.pdf

chapter 12 to revise your code.

Have a great day,
Jennie Zhang