To calculate timer value

[Pari Boopathy]

how to calculate the timer value for 9ms of bit with internal 16Mhz oscillator?

 

[Kripton2035]

here for almost all current mcu today
https://www.mikroe.com/timer-calculator/

but you did not specify your mcu, nor the language you use ?

 

[Pari Boopathy]

here for almost all current mcu today
https://www.mikroe.com/timer-calculator/

but you did not specify your mcu, nor the language you use ?

I am using TM4C123GH6PM Microcontroller...Using CCS Compiler,,..

 

[Kripton2035]

the TM4C123 is referenced in the timer-calculator program
it gives a code like this for mikroC, which should not be far from the CCS C

//Timer0 Prescaler :2; Preload = 48000; Actual Interrupt Time = 9 ms; Mode: 16bit
 
//Place/Copy this part in declaration section
void InitTimer0A(){
  SYSCTL_RCGCTIMER_R0_bit = 1;
  EnableInterrupts();
  TIMER_CTL_TAEN_bit = 0;
  TIMER0_CFG   = 4;
  TIMER0_TAMR |= 2;
  TIMER0_TAPR  = 2;
  TIMER0_TAILR = 48000;
  NVIC_IntEnable(IVT_INT_TIMER0A_16_32_bit);
  TIMER_IMR_TATOIM_bit = 1;
  TIMER_CTL_TAEN_bit   = 1;
}
 
void Timer0A_interrupt() iv IVT_INT_TIMER0A_16_32_bit {
  TIMER_ICR_TATOCINT_bit = 1;
  //Enter your code here
}

 

[Pari Boopathy]

What Count rate u r using to calculate the Timer's Clock Frequency??

 

[Kripton2035]

16 MHz as you stated in the first post
but you should download the timer calculator program, it's free and easy to play with.

 

[nikhilt007]

TMR Reg value =9ms x16Mhz/4

if your timer is 8 bit load timerReg value with 255-TMR Reg value
if it is 16 bit 65535-TMR Reg value

- - - Updated - - -

TMR Reg value =9ms x16Mhz/(4xprescelar)

if your timer is 8 bit load timerReg value with 255-TMR Reg value
if it is 16 bit 65535-TMR Reg value