topic sci error after restart qg8 in 8-bit Microcontrollers

sci error after restart qg8

danijv — Fri, 29 May 2009 05:48:20 GMT

Hi!

first of all, excuse me because of my bad english ..

well, i'm designing a project for QG8 which uses some modules (ADC, SCI, RTI, MTIM...). It measures two analog sensors and sends the information through SCI.

When I started to use the SCI module it was so easy, and it worked properly. Now I have a problem.

When I burn my program in the QG8, it sends the bytes properly. But if I switch off and next I switch on, it doesn't send the bytes it should. I mean..

For example, I want to send " AA 55 BB 22 CC 33 ", so when I burn the code with CW it sends ok, but when the QG8 has been restarted it sends "5A 97 ED 5F"...

Could anybody help me?

thank you !!

Message Edited by danijv on 2009-05-28 11:50 PM

Re: sci error after restart qg8

danijv — Fri, 29 May 2009 06:05:25 GMT

Hi again !

I forgot to say that I've tried it from 300 baud to 9600.. it always happen ...

thanksssss

Re: sci error after restart qg8

peg — Fri, 29 May 2009 06:09:17 GMT

Hello and welcome to the fora, danijv.

What clock source are you using?

If it is the internal clock are you trimming it properly? i.e. transfering the trim values from the non-volatile register to the working ones.

Re: sci error after restart qg8

danijv — Fri, 29 May 2009 06:12:09 GMT

it is the internal clock, and i don't know how to trim it ....

Re: sci error after restart qg8

peg — Fri, 29 May 2009 07:41:16 GMT

Hi,

I don't have time at the moment for you but if you put "trim" into the search box at the bottom of the page you will find lots of info on this.

Re: sci error after restart qg8

danijv — Mon, 08 Jun 2009 02:03:29 GMT

Hi!!

Finally, I solved the problem. I had no trimmed the internal clock.

In debug mode, I read the values of ICSTRM and ICSSC_FTRM. Next, my code copy this values to these registers and it works!!

Thank you very much for your help,