pic 12f675 timer1 interrupt

[obidaa]

please can anyone help me

timer1 dont work with external crystal 32.768

this is my pgm

main.c

#int_TIMER1
void TIMER1_isr(void)
{
output_high (pin_a1);
}



void main()
{

setup_adc_ports(NO_ANALOGS|VSS_VDD);
setup_adc(ADC_OFF);
setup_timer_0(RTCC_INTERNAL|RTCC_DIV_1);
setup_timer_1(T1_EXTERNAL|T1_DIV_BY_8|T1_CLK_OUT);
setup_comparator(NC_NC);
setup_vref(FALSE);
enable_interrupts(INT_TIMER1);
enable_interrupts(GLOBAL);

// TODO: USER CODE!!
while(1)
{
delay_ms( 500 );
output_high (pin_a0);
delay_ms( 500 );
output_low (pin_a0);

}

}


main.h

#include <12F675.h>

#device adc=8

#FUSES NOWDT //No Watch Dog Timer
#FUSES INTRC //Internal RC Osc
#FUSES NOCPD //No EE protection
#FUSES NOPROTECT //Code not protected from reading
#FUSES NOMCLR //Master Clear pin used for I/O
#FUSES NOPUT //No Power Up Timer
#FUSES BROWNOUT //Reset when brownout detected
#FUSES BANDGAP_HIGH
#use delay(clock=4000000)
#use rs232(baud=9600,parity=N,xmit=PIN_A2,rcv=PIN_A2,bits=8)

[asmboy]

how do you know it wont work?

did you bother to build hardware?

you do realize you spec'd external clock right ?

OR ?? is only a student project simulation?

does it compile w/o error?

what compiler version are you using??

[ckielstra]

First:
- When posting code, use the 'code' buttons. This makes your code easier to read and will get you better response.
- Always post your compiler version.

I tried to compile your program in v4.140 but it failed with an error on the fuse BANDGAP_HIGH. I commented this line out but am very surprised it works for you.

[Ttelmah]

T1_OSC_OUT is always required when you want to use the T1 input as an oscillator. By default enabling 'T1_EXTERNAL', just selects the input source to be from the T1 OSC1 pin, but does not enable the second pin as an output. This is what T1_OSC_OUT does.

I'd repeat the mantra 'compiler version' though, since the fuses don't agree with those from any compiler version I can find for the 675....

Best Wishes

[obidaa]

thank you

i need use external clock for use 32768 Hz for small project clock
but not work in simulation proteus isis or mplab






thanks[/img]

[Ttelmah]

You are still not answering the question posed by three people now. Compiler version?. Your code as posted _will not compile_ with any version I can find....

[obidaa]

i am sorry i don't understand

my compile ccs 4.068

[Ttelmah]

OK. With 4.070, nearest I have to that compiler version, it compiles. Immediately, screamingly obvious fault. Fuses.
Replace 'INTRC', with 'INTRC_IO'.
Problem is you are telling the chip to put the master oscillator/4 out on the OSC2 pin, which you also want to use for the 32K crystal.....

Best Wishes

[obidaa]

i change INTRC to INTRC_IO but

in mplab timer1 not work



thank you for reaply

[Ttelmah]

You need to generate a stimulus file to simulate the clock, or the timer won't work....

[obidaa]

thanks a lot