Please advise

似水ai流年

Please advise [Copy link]

Experts, please take a look at my program, multi-channel ultrasonic distance measurement. But the measurement is incorrect, and the returned value is random. I don't know why

huo_hu

You can use an oscilloscope to see if the signal is coming in.

似水ai流年

The signal must have come in, because if the signal did not come in, the TBCCR1 register would have no value.

似水ai流年

huo_hu posted on 2018-4-24 08:21 First use an oscilloscope to see if the signal is coming in.

The signal must be coming in, because if the signal does not come in, the TBCCR1 register will have no value.

huo_hu

OK, then open a buffer to temporarily store count0 1 data and see what happens.

huo_hu

Are you using an ultrasonic module? I remember there was a trigger input signal that needed to be operated.

王轩shadow

Only test one channel and check if the data is normal.