Timer 2 Frequency

Posted on April 08, 2014 at 15:48

Hello everyone,

I am trying to Set up timer with 1ms Tick value and it does not seems to be working correctly.

TIM_TimeBaseStructure.TIM_Period = TIMER_MAIN_1MS_VAL;

TIM_TimeBaseStructure.TIM_Prescaler = 2;

TIM_TimeBaseStructure.TIM_ClockDivision = 0;

TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;

Where TIMER_MAIN_1MS_VAL = A410

Clock Freq = 84Mhz. so the formula would be

1/84000000 = 1.1904e^-8

1.1904e^-8 *42000(A410) = .0005 prescalar is 2 so it become .001 means 1ms.

But it doesn't seems to be working. Any help guys..

1/ Clock Freq

#stm32 #stm32-timer-counter #stm32-timer

This topic has been closed for replies.

Guru

Posted on April 08, 2014 at 16:03

Values programmed into Prescaler and Period in the form N-1

Prescaler = 2 - 1;

Period = 42000 - 1;

(84000000 / 2) / 42000 = 1000 Hz

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Associate II

Posted on April 08, 2014 at 18:49

Got it Clive :) Thanks a Ton

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