Have you tried pushing the tachometer in physically? The units of tachometer output is rpm. Try changing the Interrupt mode away from Rising and choosing others. Make sure the sample time is 0.1 and not something else.
Have you tried pushing the tachometer in physically? The units of tachometer output is rpm. Try changing the Interrupt mode away from Rising and choosing others. Make sure the sample time is 0.1 and not something else.