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dspic timer 1 problem

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hisham.i

Joined: 22 Aug 2010
Posts: 43

dspic timer 1 problem

Posted: Thu May 05, 2011 3:34 am

Hello..
Its the first i use timers, and i was testing a program which makes interrupt after timer overflow and send character to serial port.

When i used External clock source for timer configuration the timer is not working while using internal clock source in timer configuration the timer works.

This is the code(am using dspic30f4012):

Code:

#include <30f4012.h>
#device *=16 //16 bits pointer
#fuses XT_PLL8,NOWDT,NOPUT,PR
#device ADC=10
#use delay(clock=80MHZ)
#use rs232(baud=9600,parity=N,xmit=PIN_C13,rcv=PIN_C14,bits=8)

void main()
{
setup_uart(9600);
delay_ms(100);
putc('k');
ENABLE_INTERRUPTS(INTR_GLOBAL );
SETUP_TIMER1(T1_EXTERNAL_SYNC| TMR_DIV_BY_8);
SET_TIMER1(0);
ENABLE_INTERRUPTS(INT_TIMER1);
while(1);

}

#INT_TIMER1
void inter_timer1()
{
putc('h');
SET_TIMER1(0);
}

What can be done in order for the timer to work with the external clock?
The second question if i used the internal clock for the timer, the whole program will still work on the external oscillator clock right?
Thanks

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