Hi Junyeong, [quote userid="609249" url="~/support/microcontrollers/c2000-microcontrollers-group/c2000/f/c2000-microcontrollers-forum/1499747/tms320f28377s-inquire-about-cevt-of-ecap-and-method-to-link-epwm"]We checked the cevt flag in ccs's debug mode, and it does not occur at every rising edge, but occurs less frequently. How can I change the code if I try to properly generate cevt according to the rising edge and falling edge of the input signal?[/quote] Have you tried to run one of our eCAP examples successfully? Can you confirm if ECCTL2.SYNCI_EN is zero? Are there any glitches or possible noise on the input pins that are capturing the waveforms? Are the pulse width captured values expected in the ISR when a CAPEVT1 or CAPEVT2 occurs? Best, Ryan Ma
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