Hi everyone, please can anyone help me out? I want to get the duration of
an echo pulse through gpio/input pin. I interfaced PING ultrasonic range
finder with XM1000(TelosB) through GPIO pin. the sensor requires a pulse of
5micro seconds to trigger it, it then returns an echo whose duration I
needed. below is my code section: thank you in advance.
(PingingP.nc)
*module PingingP @safe() { uses { interface Boot;
interface Leds; interface HplMsp430GeneralIO as
samplePin; interface BusyWait<TMicro, uint16_t> as delay;
interface Timer<TMilli> as Timer; }} implementation {
uint16_t Time; event void Boot.booted() { call
Timer.startPeriodic(2000);} event void Timer.fired () { call
Leds.led1Toggle(); call samplePin.makeOutput(); //make the pin an
output call samplePin.set(); //start ranging call delay.wait
(5); //for 5 micro seconds call samplePin.makeInput(); // make the
pin an input Time = call samplePin.get(); //this is where am
confused, how to get the duration of the echo pulse and print it?
printf("Time is %d\n", Time); }}*
(PingingC.nc)
#include <Timer.h>
configuration BuzzerC {
}
implementation {
components MainC, BuzzerP as App, LedsC;
MainC.Boot <- App;
App.indication3 -> HplMsp430GeneralIOC.Port26; //pin4 of the 6 pins
expansion
App.Leds -> LedsC;
components HplMsp430GeneralIOC;
components BusyWaitMicroC;
App.delay -> BusyWaitMicroC;
components SerialPrintfC;
components new TimerMilliC() as Timer;
App.Timer -> Timer;
}
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