delay problem with pic18f452 and 20 MHZ clock?

[arl]

Hi,

I have a PIC 18f452 and 20MHZ (clock reference says M20.000D4D).

With a simple ccs c program like this:

#include <18F452.h>
#fuses HS,NOWDT,NOPROTECT,NOLVP
#use delay (clock=20000000)

void main() {
output_low(pin_a0);
delay_ms(1000); //pause 1 sec
output_high(pin_a0); //blink red led
delay_ms(5000); //pause 5 sec
output_low(pin_a0); //turn of led
}

Instruction delay never work! and cause a program malfunction (i think an infinite delay), but when I adjust use delay precompiler instruction to #use delay (clock=4000000) 4MHZ program works but delay time has not a good precision (delay_ms(1000) takes approx. 300ms).

What happens? Im sure my hardware is ok. I have 3.203 version,

Thanks!

[PCM programmer]

PCH vs. 3.203 is reported as very buggy:
http://www.ccsinfo.com/forum/viewtopic.php?t=19807
http://www.ccsinfo.com/forum/viewtopic.php?t=20561
If you email CCS tech support and can demonstrate
to them that your version is not usable, they might
let you download the current version. I don't know
that they will do it, but they might.

[arl]

thanks PCM,

I update compiler and program works fine! Last version had a bug.


All around seems to be OK.


Best regards.