jakob hz / Mbed 2 deprecated HC-SR04-2410

A program that demonstrates the development of library, using as an example an ultrasonic distance sensor HC-SR04.

Dependencies:   mbed HCSR04 AutomationElements

main.cpp

Committer:
tbjazic
Date:
2016-12-10
Revision:
6:bca0839e8295
Parent:
4:052ac3f5c938
Child:
7:667133e8fb42

File content as of revision 6:bca0839e8295:

#include "mbed.h"
#include "HCSR04.h"
#include "AutomationElements.h"

Serial pc(USBTX, USBRX);
HCSR04 sensor(p5, p7);
float sampleTime = 0.5;
PT1 filter(1, 2, sampleTime);
Ticker ticker;
float distance;
float filteredDistance; 

void calc() {
    sensor.startMeasurement();
}

int main() {
    sensor.setRanges(2, 400);
    pc.printf("Minimum sensor range = %g cm\n\rMaximum sensor range = %g cm\n\r", sensor.getMinRange(), sensor.getMaxRange());
    pc.printf("Sensor:       Filtered:\n\r");
    ticker.attach(&calc, sampleTime);
    while(true) {
        while(!sensor.isNewDataReady()) {
        // wait for new data
        }
        distance = sensor.getDistance_cm();
        filter.in(distance);
        filteredDistance = filter.out();
        pc.printf("%7.1f cm  %7.1f cm\n\r", distance, filteredDistance);
    }
}