Ultrasonic error: unofficial reply

You won’t get a quick answer posting to the EasyC - official forum, it’s Sunday night after all.

The input to the ultrasonic is the output from the cortex, in your case port 11, the output from the ultrasonic goes to port 12 (the interrupt port in EasyC). Change the controller configuration so that port 12 is an input rather than the default which is an output.

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