Why do you think that start reacts to a rising flank and capture to a falling flank? The component data sheet says a capture happens when "a capture event is active". This means the signal must go high for a capture.
In your schematic, a NOT gate should then help. Or even better: use an edge detector component.
Thank you for reply! But the inputs can be configured as either 'rising edge', 'falling edge' or both?
On datasheet: The Input Configuration parameters select the visibility and mode for each of the five input signals (Reload, Start, Stop, Capture, and Count). These inputs are not visible on the symbol by default. Check the Present checkbox for each input that is needed in the design to make it present on the symbol for connection. Each of these signals can be configured to be triggered by a Rising edge, Falling edge, Either edge, or based on the signal Level
Can you share your project? The images show not everything...
How did you determine the interrupt is not triggered? By software? (Maybe the ISR was not started...) You can route the interrupt line a to a pin and then use a scope to check.
I got it worked... something messed up in the software...
Much appreciated for your reply. Thanks!
Could you share what went wrong in the setup, so that it will be helpful for the community.