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@6:bca0839e8295, 2016-12-10 (annotated)

Committer:
tbjazic
Date:
Sat Dec 10 08:28:06 2016 +0000
Revision:
6:bca0839e8295
Parent:
4:052ac3f5c938
Child:
7:667133e8fb42
Filtering with Ticker object corrected.

Who changed what in which revision?

UserRevisionLine numberNew contents of line
tbjazic 0:ebee649c5b1b 1 #include "mbed.h"
tbjazic 2:f86b1e3609b3 2 #include "HCSR04.h"
tbjazic 4:052ac3f5c938 3 #include "AutomationElements.h"
tbjazic 0:ebee649c5b1b 4
tbjazic 3:3297ea6e3ae1 5 Serial pc(USBTX, USBRX);
tbjazic 4:052ac3f5c938 6 HCSR04 sensor(p5, p7);
tbjazic 6:bca0839e8295 7 float sampleTime = 0.5;
tbjazic 4:052ac3f5c938 8 PT1 filter(1, 2, sampleTime);
tbjazic 4:052ac3f5c938 9 Ticker ticker;
tbjazic 4:052ac3f5c938 10 float distance;
tbjazic 4:052ac3f5c938 11 float filteredDistance;
tbjazic 4:052ac3f5c938 12
tbjazic 4:052ac3f5c938 13 void calc() {
tbjazic 6:bca0839e8295 14 sensor.startMeasurement();
tbjazic 4:052ac3f5c938 15 }
tbjazic 0:ebee649c5b1b 16
tbjazic 0:ebee649c5b1b 17 int main() {
tbjazic 6:bca0839e8295 18 sensor.setRanges(2, 400);
tbjazic 4:052ac3f5c938 19 pc.printf("Minimum sensor range = %g cm\n\rMaximum sensor range = %g cm\n\r", sensor.getMinRange(), sensor.getMaxRange());
tbjazic 4:052ac3f5c938 20 pc.printf("Sensor: Filtered:\n\r");
tbjazic 4:052ac3f5c938 21 ticker.attach(&calc, sampleTime);
tbjazic 6:bca0839e8295 22 while(true) {
tbjazic 6:bca0839e8295 23 while(!sensor.isNewDataReady()) {
tbjazic 6:bca0839e8295 24 // wait for new data
tbjazic 6:bca0839e8295 25 }
tbjazic 6:bca0839e8295 26 distance = sensor.getDistance_cm();
tbjazic 6:bca0839e8295 27 filter.in(distance);
tbjazic 6:bca0839e8295 28 filteredDistance = filter.out();
tbjazic 6:bca0839e8295 29 pc.printf("%7.1f cm %7.1f cm\n\r", distance, filteredDistance);
tbjazic 0:ebee649c5b1b 30 }
tbjazic 0:ebee649c5b1b 31 }