Serin Problem with 12F629/PBP

[Archangel]

I think I have never used serin successfully, therefore let me ask <b>you</b> an <u><font color = red><b>unqualified question:</u></b></font color> How many letters can you store in a single byte variable, like B0 ? And as I am leaving the house right now and do not have my manual handy, I may be all wet as to this line of questioning.

[Flyingms]

Joe,

Thanks for replying to my post. Of course, the single byte variable can only store one ascii charactor (char in C). One charactor is just enough to reply to a Yes/No ( Y )/( N ) query presented with SEROUT. Please understand that I am just trying to get this to work and will build on that... As of now, I cannot get past inputting a single char SERIN. I dont know if it is my hw implementation ( using MEL suggested resistors ), am missing something unique to 12F629 programming, or my serial port setup on the PC.

Further information about my configuration:
- Using a 4Mhz external resonator
- Selected XT on meProg..
- SEROUT working beautifully...
- Hyperterm set to 8N1 and receives ASCII from 629

[Flyingms]

Hello All,

I got SERIN to work.. I summized that my code was no different than half a dozen other 629/675 SERIN code snippets in the archives.. So I thought that maybe I was barking up the wrong tree ( code problem ). Maybe my problem was the input interface. I was using the MEL suggested 22k resistor ( 22.1k ) on the PIC input with no luck. I Googled "PIC RS232 Interface" and found multiple links that use only a 10k input resistor. I changed my input resistor to 10k and bang it worked...

Thanks everyone for the support. As I learn more, I hope to be an active member on this board.

George