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Telecomguy
Joined: 16 Jun 2005
Posts: 2
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| kbhit() use |
 Posted: Fri Jun 17, 2005 12:03 am |
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I am trying to address Port D when send[code]ing 2 through RS232 to the PIC 16F877. I am still a very beginner and I am trying to modify an example from a CCS book, however I don't know how to modify it. The following is giving me an error when compiled by CCS.
[code]
#include <16F877.h>
#use delay (clock=20000000)
#fuses HS,NOWDT,NOPROTECT
#use rs232 (baud=9600,parity=N,xmit=PIN_C6,rcv=PIN_C7,stream=RS232,bits=8)
#include <stdio.h>
#include <stdlib.h>
char ch;
void main()
{
[/code]
while(1)
{
if (kbhit())
{
ch=getchar();
if ch()==2;
output_D (~ch);
printf ("\n\r You pressed %c", ch);
}
}
}
[code]
Can anyone help in modifying this code so it works the way I want to work. Thanks! |
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jds-pic
Joined: 17 Sep 2003
Posts: 205
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| Posted: Fri Jun 17, 2005 12:32 am |
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| Code: | if (kbhit())
{
ch=getchar();
if ch()==2;
output_D (~ch);
printf ("\n\r You pressed %c", ch);
} |
can i make a suggestion?
before you go any further, pick up a copy of the following:
The C Programming Language
by Brian W. Kernighan and Dennis M. Ritchie.
Prentice Hall, Inc., 1988.
ISBN 0-13-110362-8 (paperback), 0-13-110370-9 (hardback).
you will need this book for the rest of your embedded C programming life. with it you can learn the basic constructs of C and avoid the type of mistakes you are making above.
we can give you fish, or teach you to fish -- you'll find the latter is much more useful and a lot less frustrating.
jds-pic
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Humberto
Joined: 08 Sep 2003
Posts: 1215
Location: Buenos Aires, La Reina del Plata
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| Posted: Fri Jun 17, 2005 7:48 am |
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| Code: |
#include <16F877.h>
#fuses NOWDT,XT, PUT, NOPROTECT, BROWNOUT, NOLVP, NOCPD, NOWRT, NODEBUG
#use delay (clock=20000000)
#use rs232 (baud=9600,xmit=PIN_C6,rcv=PIN_C7)
char ch;
void main()
{
printf("\r\n TEST\r\n");
while(1)
{
if(kbhit())
{
ch = getc();
delay_ms(5);
printf ("\r\nYou pressed ASCII: %C Hex: 0x%X Dec: %u",ch,ch,ch);
if( ch == '2' )
{
output_D(~ch);
}
}
}
}
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Humberto |
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Telecomguy
Joined: 16 Jun 2005
Posts: 2
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| Thanks |
| Posted: Fri Jun 17, 2005 6:20 pm |
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| Thanks a lot Humberto, you managed to solve my problem. |
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Telecomguy
Joined: 16 Jun 2005
Posts: 2
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| Posted: Fri Jun 17, 2005 6:27 pm |
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jds-pic I really really wish to do it the way you suggested. No body like to end up frustrated the way I am. However I was misguided in my school project and loads of efforts were wasted. I am here trying to solve administration problems imposed on me. I'm frustrated and bagging information otherwise due to course deliverance mismanagement I am loosing my certification. I appreciate your suggestion and I am spending whole nights practicing examples from 'Embedded C Programming and the microchip PIC' which is a very good book and I intend to keep practicing after I finish this project.
Best regards to all
Telecomguy |
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