hello people i use timer 1 and timer 3 to count tiks (timer 1 is a 16bits, timer 3 is 8 bits) the 2 are configured in free mode and prescaler = 1 and uste timer 4 how the timer ( for example when the pass x cicles stop the other times)
and mi code is this:
static uint32 countMeasure,countMeasure1, contador ;
uint16 minutes=1000;//5858;
int main(void)
{
// TICKS and clock To 32Mhz
CLKCONCMD =0X00;
T1IE = 1;
T3IE = 1;
T4IE = 1;
// Enable global interrupt by setting the [IEN0.EA=1].
EA = 1;
// divide preescaler to 1.
T4CC0 = 0xF0;
T4CTL = T4CTL_DIV_128 | T4CTL_OVFIM | T4CTL_MODE_FREERUN | T4CTL_START;
T3CTL = 0x18;
T1CTL = 0x01;
BLUE =0;
RED =0;
for(;;){
}
}
/*******************************************************************************
* @fn t1_isr
*
* @brief Interrupt handler for Timer 3 overflow interrupts. LED1 is turned
* off and LED3 is turned on. Interrupts from Timer 3 are level
* triggered, so the module interrupt flag is cleared
* prior to the CPU interrupt flag.
*
* @param void
*
* @return void
*
*******************************************************************************/
#pragma vector = T1_VECTOR
__interrupt void t1_isr(void)
{
// Clears the module interrupt flag.
T1STAT = 0;
//T3OVFIF = 0;
//while is wqual to 1 is count
if (count==1){
countMeasure1++;
} else {
// countMeasure1= (countMeasure1); // multiply countMeasure to *65535;
printf("tiks = %ld \n", countMeasure1);
//stop interrupts
T1IE = 0;
// EA = 0;
//stop timer
T1CTL=0X00;
}
T1IF = 0;
}
/*******************************************************************************
* @fn t3_isr
*
* @brief Interrupt handler for Timer 3 overflow interrupts.
*
* @param void
*
* @return void
*
*******************************************************************************/
#pragma vector = T3_VECTOR
__interrupt void t3_isr(void)
{
// Clears the module interrupt flag.
T3OVFIF = 0;
//while is wqual to 1 is count
if (count==1){
countMeasure++;
} else {
countMeasure= (countMeasure); // multiply countMeasure to *65535;
printf("tiks = %ld\n", countMeasure);
//stop interrupts
T3IE = 0;
// EA = 0;
//stop timer
T3CTL=0X00;
}
T3IF = 0;
}
// in mi case use when the time in t4 is expire change count to zero
#pragma vector = T4_VECTOR
__interrupt void t4_isr(void)
{
// Clears the module interrupt flag.
T4OVFIF = 0;
if (contador>=minutes) // minutes is variable to control the time stop the count
{
count=0;
RED =!RED;
BLUE =!BLUE ;
T4CTL=0X00;
} contador++;
T4IF = 0;
//
}
when stop the timers i print the times overflows, in timer 1 print 500, and in timer 3 print = 44611
and to find the total tiks multiplied by bits
timer 1= 500 x65535 = 32767500 tiks
timer 3= 44611 x 255 = 11375805 tiks
but when mutupli the tiks total is very diferent, timer 1 is near to frecuency the internal clock (32 Mhz ) AND TIMER 3 is It is much lower
i dont undertand because the totals tiks is diferents,
