CCS :: View topic - delay function problem on 18F452

CCS C Software and Maintenance Offers

FAQ

Official CCS Support

Profile Log in to check your private messages Log in

CCS does not monitor this forum on a regular basis.

Please do not post bug reports on this forum. Send them to support@ccsinfo.com

delay function problem on 18F452

CCS Forum Index -> General CCS C Discussion

View previous topic :: View next topic

Author

Message

filjoa

Joined: 04 May 2008
Posts: 260

delay function problem on 18F452

Posted: Wed May 05, 2010 9:17 am

Reply with quote

hi

Today I try make this simple program with an 18F452 at 20Mhz, but when I write delay_ms(1000) comand my led flash quickly and not with +- 1sec.

Have any problem on 18F452 library?

Code:

#include <18F452.h>
#fuses HS,NOWDT,NOPROTECT,NOLVP,BROWNOUT,STVREN
#use delay(clock=20000000)
#use rs232(baud=115200,parity=N,xmit=PIN_C6,rcv=PIN_C7,bits=8)

#build(reset=0x200)
#build(interrupt=0x208)
#org 0x0000,0x01ff
void bootloader() {
#asm
nop
#endasm
} // Reserve space for the bootloader

void main(void)
{

while(TRUE)
{
output_high(PIN_B7);
delay_ms(1000);
output_low(PIN_B7);
delay_ms(1000);
}
}

Best regards

PCM programmer

Joined: 06 Sep 2003
Posts: 21708


Posted: Wed May 05, 2010 11:28 am

The typical reason for this problem is that your bootloader core program was programmed for one frequency, and your application program is set for a different frequency.

Display posts from previous:

	CCS Forum Index -> General CCS C Discussion	All times are GMT - 6 Hours
Page 1 of 1

You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum

Powered by phpBB © 2001, 2005 phpBB Group