I am using stm32f103 for project and keil ide for the compilation. I have configured timer 2 having 16 MHz clk frequency. I need to generate interrupt at 100 ms so I have configured Prescaler val as 24 and period val as 63999. but getting at 95 or 11

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Peter BENSCHBest answer

ST Technical Moderator

The duration of the timer should be measured as directly as possible, e.g. by switching and measuring on a GPIO.

printf is not suitable for this use case, especially if its output is sent to Linux, which is not an RTOS with a predictable response time.

Regards

/Peter

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Peter BENSCH

ST Technical Moderator

Welcome, @PGare.1, to the community!

do you use HSI as clock source?

Regards

/Peter

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PGare.1Author

Associate II

Thanks for reply. No We are using HSE as clock source

Peter BENSCH

ST Technical Moderator

OK.

Did you check the frequency coming from HSE using e.g. the pin MCO?

How did you measure the duration of TIM2?

Regards

/Peter

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