Stanley Cohen / Mbed 2 deprecated AnalogMax_v2

example to read an analog input ultrasonic sensor.

Dependencies:   mbed

amaxmain2.cpp@0:f2441ea29233, 2015-04-22 (annotated)

Committer:
scohennm
Date:
Wed Apr 22 18:07:44 2015 +0000
Revision:
0:f2441ea29233
example to read an analog input ultrasonic sensor.

Who changed what in which revision?

UserRevisionLine numberNew contents of line
scohennm 0:f2441ea29233 1 #include "mbed.h"
scohennm 0:f2441ea29233 2
scohennm 0:f2441ea29233 3 //#define PRINTDBUG
scohennm 0:f2441ea29233 4 #define WAITTIME 100
scohennm 0:f2441ea29233 5 #define NEARLIMIT 0.025
scohennm 0:f2441ea29233 6 #define FARLIMIT 0.40
scohennm 0:f2441ea29233 7 #define LEDON false
scohennm 0:f2441ea29233 8 #define LEDOFF true
scohennm 0:f2441ea29233 9 #define LEDFULLBRITE 0.0
scohennm 0:f2441ea29233 10 #define LEDNOBRITE 1.0
scohennm 0:f2441ea29233 11 #define HALFBRITE 0.5
scohennm 0:f2441ea29233 12 #define PROGNAME "AnalogMAX v2\r\n" // puTTY does not automatically add carriage return
scohennm 0:f2441ea29233 13
scohennm 0:f2441ea29233 14 AnalogIn input(PTC2);
scohennm 0:f2441ea29233 15 // Set up PWM on all three colors
scohennm 0:f2441ea29233 16 PwmOut greenLED(LED_GREEN); // green led
scohennm 0:f2441ea29233 17 PwmOut blueLED(LED_BLUE);
scohennm 0:f2441ea29233 18 PwmOut redLED(LED_RED); // red led
scohennm 0:f2441ea29233 19 Serial pc(USBTX, USBRX);
scohennm 0:f2441ea29233 20 Timer millis;
scohennm 0:f2441ea29233 21
scohennm 0:f2441ea29233 22 int ledState = false;
scohennm 0:f2441ea29233 23
scohennm 0:f2441ea29233 24 void takeData(float spanScale) {
scohennm 0:f2441ea29233 25
scohennm 0:f2441ea29233 26 float samples;
scohennm 0:f2441ea29233 27 float scaledPWM;
scohennm 0:f2441ea29233 28
scohennm 0:f2441ea29233 29 samples = input.read();
scohennm 0:f2441ea29233 30 #ifdef PRINTDBUG
scohennm 0:f2441ea29233 31 pc.printf("%f\r\n", samples);
scohennm 0:f2441ea29233 32 #endif
scohennm 0:f2441ea29233 33 if ((samples > NEARLIMIT) && (samples < FARLIMIT)){
scohennm 0:f2441ea29233 34 scaledPWM = (samples - NEARLIMIT)*spanScale;
scohennm 0:f2441ea29233 35 redLED = 1.0 - scaledPWM;
scohennm 0:f2441ea29233 36 // greenLED = LEDOFF; // on
scohennm 0:f2441ea29233 37 blueLED = scaledPWM;
scohennm 0:f2441ea29233 38 #ifdef PRINTDBUG
scohennm 0:f2441ea29233 39 pc.printf("RED -> %f BLUE -> %f\r\n", redLED.read(), blueLED.read());
scohennm 0:f2441ea29233 40 #endif
scohennm 0:f2441ea29233 41 }else{
scohennm 0:f2441ea29233 42 redLED = LEDNOBRITE; // off
scohennm 0:f2441ea29233 43 // greenLED = HALFBRITE;
scohennm 0:f2441ea29233 44 blueLED = LEDNOBRITE;
scohennm 0:f2441ea29233 45 }
scohennm 0:f2441ea29233 46 return;
scohennm 0:f2441ea29233 47 }
scohennm 0:f2441ea29233 48 // end takeData()
scohennm 0:f2441ea29233 49 // ----------------------------
scohennm 0:f2441ea29233 50 int main() {
scohennm 0:f2441ea29233 51 float spanScale;
scohennm 0:f2441ea29233 52
scohennm 0:f2441ea29233 53 // initialization
scohennm 0:f2441ea29233 54 // calulate scaling for red/blue LED
scohennm 0:f2441ea29233 55
scohennm 0:f2441ea29233 56
scohennm 0:f2441ea29233 57 spanScale = 1.0/(FARLIMIT-NEARLIMIT);
scohennm 0:f2441ea29233 58 pc.printf(PROGNAME);
scohennm 0:f2441ea29233 59
scohennm 0:f2441ea29233 60 greenLED = HALFBRITE; // 1/2 on
scohennm 0:f2441ea29233 61 redLED = LEDNOBRITE; // pwm off
scohennm 0:f2441ea29233 62 blueLED = LEDFULLBRITE; // pwm on
scohennm 0:f2441ea29233 63 millis.start();
scohennm 0:f2441ea29233 64 millis.reset();
scohennm 0:f2441ea29233 65 // Loop forever
scohennm 0:f2441ea29233 66 while(true){
scohennm 0:f2441ea29233 67 if (millis.read_ms() > WAITTIME) {
scohennm 0:f2441ea29233 68 takeData(spanScale);
scohennm 0:f2441ea29233 69 millis.reset();
scohennm 0:f2441ea29233 70 }
scohennm 0:f2441ea29233 71 }
scohennm 0:f2441ea29233 72
scohennm 0:f2441ea29233 73 } // end main