Gary Mitchell / Mbed 2 deprecated SonarRangeFinderV1-2

MB7040 Range finder experiment.

Dependencies:   mbed

Fork of SonarRangeFinderV1 by Jim Belesiu

main.cpp@0:28fb80eb93ca, 2014-12-26 (annotated)

Committer:
Belesiu
Date:
Fri Dec 26 21:20:04 2014 +0000
Revision:
0:28fb80eb93ca
Child:
1:0cf1f2254f10
First test program for MB7040 ultasonic range finder

Who changed what in which revision?

UserRevisionLine numberNew contents of line
Belesiu 0:28fb80eb93ca 1 // Ultra Sonice Range Finder
Belesiu 0:28fb80eb93ca 2 // Experiement #1
Belesiu 0:28fb80eb93ca 3 // Belesiu
Belesiu 0:28fb80eb93ca 4 // 2014.12.26
Belesiu 0:28fb80eb93ca 5
Belesiu 0:28fb80eb93ca 6 #include "mbed.h"
Belesiu 0:28fb80eb93ca 7
Belesiu 0:28fb80eb93ca 8 DigitalOut myled(LED1);
Belesiu 0:28fb80eb93ca 9
Belesiu 0:28fb80eb93ca 10 I2C rangefinder(p9, p10); // sda, sc1
Belesiu 0:28fb80eb93ca 11 Serial pc(USBTX, USBRX); // tx, rx
Belesiu 0:28fb80eb93ca 12
Belesiu 0:28fb80eb93ca 13 const int addr = 0xE0;
Belesiu 0:28fb80eb93ca 14 char config_r[2];
Belesiu 0:28fb80eb93ca 15 char range_read[2];
Belesiu 0:28fb80eb93ca 16 float range;
Belesiu 0:28fb80eb93ca 17
Belesiu 0:28fb80eb93ca 18 int main()
Belesiu 0:28fb80eb93ca 19 {
Belesiu 0:28fb80eb93ca 20 int x = 0;
Belesiu 0:28fb80eb93ca 21
Belesiu 0:28fb80eb93ca 22 while(1) {
Belesiu 0:28fb80eb93ca 23
Belesiu 0:28fb80eb93ca 24 // Test serial port
Belesiu 0:28fb80eb93ca 25 myled = 1;
Belesiu 0:28fb80eb93ca 26 wait(0.2);
Belesiu 0:28fb80eb93ca 27 myled = 0;
Belesiu 0:28fb80eb93ca 28 wait(0.2);
Belesiu 0:28fb80eb93ca 29 pc.printf("Hello Jim! - %d\n", x++);
Belesiu 0:28fb80eb93ca 30
Belesiu 0:28fb80eb93ca 31 // For MB7040
Belesiu 0:28fb80eb93ca 32
Belesiu 0:28fb80eb93ca 33 config_r[0] = 0x00; // set pointer reg to ‘cmd register'
Belesiu 0:28fb80eb93ca 34 config_r[1] = 0x51; // config data byte1
Belesiu 0:28fb80eb93ca 35 rangefinder.write(addr, config_r, 2);
Belesiu 0:28fb80eb93ca 36 wait(0.07);
Belesiu 0:28fb80eb93ca 37
Belesiu 0:28fb80eb93ca 38 config_r[0] = 0x02; //set pointer reg to 'data register'
Belesiu 0:28fb80eb93ca 39 rangefinder.write(addr, config_r, 1); //send to pointer 'read range'
Belesiu 0:28fb80eb93ca 40 rangefinder.read(addr, range_read, 2); //read the two-byte range data
Belesiu 0:28fb80eb93ca 41 range = ((range_read[0] << 8) + range_read[1]);
Belesiu 0:28fb80eb93ca 42
Belesiu 0:28fb80eb93ca 43 pc.printf("Range = %.2f cm\n\r", range); //print range on screen
Belesiu 0:28fb80eb93ca 44 wait(0.05);
Belesiu 0:28fb80eb93ca 45
Belesiu 0:28fb80eb93ca 46 }
Belesiu 0:28fb80eb93ca 47 }