symbol trig = C.1 ; Define pin for Trigger & Echo (All M2, X2 parts)
symbol range = w1 ; 16 bit word variable for range
main: low b.1
pulsout trig,2 ; produce 20uS trigger pulse (must be minimum of 10uS)
pulsin trig,1,range ; measures the range in 10uS steps
pause 20 ...