STR750 : TIM PWM input capture (with PWM signals < 2kHz)

Posted on June 14, 2007 at 08:40

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Associate III

Posted on June 12, 2007 at 14:24

Hello everybody,

Using the Timer PWM input capture example, i'm trying to get the duty cycle of a PWM signal whose frequency is below 2kHz with CK_TIM = 60 MHz.

It works when f > 2kHz, but not with a 1800 Hz signal.

Thank you for your help.

-Xavier

Associate II

Posted on June 14, 2007 at 08:40

Hello,

- using CK_TIM = 60 MHz, it is possible to measure the frequency and

duty cycle of a PWM signal frequency of 915Hz.

what is the prescaler value set when measuring the 1800Hz signal?

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