I am trying to generate 10 microseconds delay by using the timer2 and also explain me how to calculate exact delay bases on Rcc 24MH what is the confirmation actually this delay I will use to integrated the sensor I. Using stm32l152retx please help a

[SKoth.1]

..

[Tesla DeLorean]

Pretty simple division occuring

Where

Period = P

Prescale = Q

UPDATE RATE = (TIMCLK / (Q + 1)) / (P + 1)

COUNT RATE = (TIMCLK / (Q + 1))

If TIMCLK == 24 MHz, and Q=0, P=0xFFFF

TIM->CNT would increment by 24 in 1 us, and 240 in 10 us

The Reference Manual should have a Clock Tree showing where the clocks are coming from and selected.

Product page and Reference Manual if you haven't already found them

https://www.st.com/en/microcontrollers-microprocessors/stm32l152re.html

https://www.st.com/resource/en/reference_manual/cd00240193.pdf

To validate, you could toggle a GPIO, or set the Period, and have the TIM toggle a pin, or use PWM mode

[SKoth.1]

sir if i calculate update rate is somthing 366 hz and again if i calculate the frequency respecter 4 cycle that means one instruction excute 4 cylce (367/4) after that i got

i got 0.000567 etc then which bases you define this is the exact delay and counter incremented 24 in 1us sir explain me detail i

confused

[dbgarasiya]

follow below steps:

Enable clock in RCC Register(see refrence manual)

TIMx->PSC = 240 (in your case 24 MHZ clock)

TIMx-->EGR = TIM_EGR_UG; (update register)

TIMx->CR1 = TIM_CR1_CEN; // start timer

TIM->CNT : read counter value

you wiil get 10us delay 

All the best

[dbgarasiya]

Have you done ?