Exactly that is my question how can i monitor the echo pin... while it receive the signal or not...
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Actually,I have connected the Sensor pins to GPIO pin's P4 and P3,
I will make the Trigger pin High which is attached to P4 of launchpad for 10microseconds,then make it low,after that I should see echo pin which P3,which will go high for a certain period of time which depends on the distance it measured and it will be also in microseconds.
The total amount of time period, when the P3 pin stays in high level can be used to calculate the distance.