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STM32F4 Frequency Counter

Question asked by nicotera.andrea on Jun 8, 2014
Latest reply on Jun 9, 2014 by nicotera.andrea
Hello everyone, i'm using the CCP module in "PWM input mode". My goal is to measure the frequency, the period and the duty cycle but the measure isn't precise, it continually changes near the true value. This happens only with frequencies higher than kilohertz. I'm using the "Peripheral_Examples" code: TIM_PWM_Input that ST has released in "STM32F4-Discovery_FW_V1.1.0" file. Can someone help me? thanks and sorry for my bad english