Timer 1 behaving strange

[Frans]

Hi,

Could someone help me white this problem #int timer_1.

this is the code. i have a questio about.
when leaving out the two line markt with **, the timer 1 give an interrupt every 16uS (see set_timer1 at FF90). When insert the line markt with ** the code works great and give a correct interupt.
I do not know what cousing the problem, could someone help to explane why behaving so strange.

thanks

Frans n

Code:

#include "C:\Program Files\PICC\progam\dmx.h"


#int_RDA
RDA_isr()
{

Dmx_data = getc();

if (bit_test(RS232_ERRORS,1) == 1) //is er een overflow oerr test
{

}
if (bit_test(RS232_ERRORS,2) == 1) //break detect FERR bit test
{
disable_interrupts(INT_RDA);
setup_timer_1(T1_INTERNAL); **
set_timer1(0xFF90);
enable_interrupts(INT_TIMER1);

output_low(PIN_B2);
delay_cycles( 2 );
output_high(pin_B2);



}

else
{
if (Break_true == true) // break is true
{
// output_low(PIN_B2);
// delay_cycles( 2 );
// output_high(pin_B2);

Break_true = false;

}
}

}


#int_TIMER1
TIMER1_isr()
{
disable_interrupts(INT_TIMER1);
setup_timer_1(T1_DISABLED);**

output_low(PIN_B2);
delay_cycles( 2 );
output_high(pin_B2);

Break_true = true;
enable_interrupts(INT_RDA);
}



void main()
{

//int8 Dmx_data;
Break_true = false;

setup_adc_ports(NO_ANALOGS);
setup_adc(ADC_OFF);
setup_spi(FALSE);
setup_counters(RTCC_INTERNAL,RTCC_DIV_2);
setup_timer_1(T1_INTERNAL);
setup_timer_2(T2_DISABLED,100,1);
disable_interrupts(INT_TIMER1);
// enable_interrupts(INT_TIMER1);
enable_interrupts(INT_RDA);
enable_interrupts(global);


while(TRUE);


}

[neil]

Hello, firstly, your setup_timer1 command seems incomplete, you are not setting up the prescaler. The line should be something like: