University of Plymouth - Stages 1, 2 and 3 / Mbed OS Task414Solution

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Fork of Task414Solution by Nicholas Outram

main.cpp@2:300429ebbcc1, 2019-09-18 (annotated)

Committer:
noutram
Date:
Wed Sep 18 13:11:27 2019 +0000
Revision:
2:300429ebbcc1
Parent:
0:7912f2086c2b 
2019

Who changed what in which revision?

UserRevisionLine numberNew contents of line
noutram 0:7912f2086c2b 1 #include "mbed.h"
noutram 0:7912f2086c2b 2
noutram 0:7912f2086c2b 3 #define kRED 4
noutram 0:7912f2086c2b 4 #define kYELLOW 2
noutram 0:7912f2086c2b 5 #define kGREEN 1
noutram 0:7912f2086c2b 6
noutram 0:7912f2086c2b 7 #define fMargin 0.05f
noutram 0:7912f2086c2b 8 #define kGYThreshold 0.4f
noutram 0:7912f2086c2b 9 #define kGYThresholdL (kGYThreshold - fMargin)
noutram 0:7912f2086c2b 10 #define kGYThresholdU (kGYThreshold + fMargin)
noutram 0:7912f2086c2b 11
noutram 0:7912f2086c2b 12 #define kYRThreshold 0.6f
noutram 0:7912f2086c2b 13 #define kYRThresholdL (kYRThreshold - fMargin)
noutram 0:7912f2086c2b 14 #define kYRThresholdU (kYRThreshold + fMargin)
noutram 0:7912f2086c2b 15
noutram 0:7912f2086c2b 16
noutram 0:7912f2086c2b 17 //Global objects
noutram 0:7912f2086c2b 18 BusOut binaryOutput(D5, D6, D7); //Outputs as an integer
noutram 0:7912f2086c2b 19
noutram 0:7912f2086c2b 20 DigitalIn SW1(D3);
noutram 0:7912f2086c2b 21 DigitalIn SW2(D4);
noutram 0:7912f2086c2b 22
noutram 0:7912f2086c2b 23 AnalogIn AIN(A0);
noutram 0:7912f2086c2b 24 float fVin = 0.0;
noutram 0:7912f2086c2b 25 unsigned state = kGREEN;
noutram 0:7912f2086c2b 26
noutram 0:7912f2086c2b 27 //Main function
noutram 0:7912f2086c2b 28 int main() {
noutram 0:7912f2086c2b 29
noutram 0:7912f2086c2b 30 while(1) {
noutram 0:7912f2086c2b 31
noutram 0:7912f2086c2b 32 //Read ADC
noutram 0:7912f2086c2b 33 fVin = AIN;
noutram 0:7912f2086c2b 34
noutram 0:7912f2086c2b 35 //Write to terminal
noutram 0:7912f2086c2b 36 printf("Analog input = %6.4f\n", fVin);
noutram 0:7912f2086c2b 37
noutram 0:7912f2086c2b 38 //Next State Logic
noutram 0:7912f2086c2b 39 switch (state) {
noutram 0:7912f2086c2b 40
noutram 0:7912f2086c2b 41 case kGREEN:
noutram 0:7912f2086c2b 42 if (fVin > kGYThresholdU) {
noutram 0:7912f2086c2b 43 state = kYELLOW;
noutram 0:7912f2086c2b 44 }
noutram 0:7912f2086c2b 45 break;
noutram 0:7912f2086c2b 46
noutram 0:7912f2086c2b 47 case kYELLOW:
noutram 0:7912f2086c2b 48 if (fVin > kYRThresholdU) {
noutram 0:7912f2086c2b 49 state = kRED;
noutram 0:7912f2086c2b 50 } else if (fVin < kGYThresholdL) {
noutram 0:7912f2086c2b 51 state = kGREEN;
noutram 0:7912f2086c2b 52 }
noutram 0:7912f2086c2b 53 break;
noutram 0:7912f2086c2b 54
noutram 0:7912f2086c2b 55 case kRED:
noutram 0:7912f2086c2b 56 if (fVin < kYRThresholdL) {
noutram 0:7912f2086c2b 57 state = kYELLOW;
noutram 0:7912f2086c2b 58 }
noutram 0:7912f2086c2b 59 break;
noutram 0:7912f2086c2b 60
noutram 0:7912f2086c2b 61 default:
noutram 0:7912f2086c2b 62 state = kGREEN;
noutram 0:7912f2086c2b 63 }
noutram 0:7912f2086c2b 64
noutram 0:7912f2086c2b 65 //Output logic = f(State)
noutram 0:7912f2086c2b 66 binaryOutput = state;
noutram 0:7912f2086c2b 67
noutram 0:7912f2086c2b 68 //Wait
noutram 0:7912f2086c2b 69 wait(0.1);
noutram 0:7912f2086c2b 70
noutram 0:7912f2086c2b 71 } //end while(1)
noutram 0:7912f2086c2b 72 } //end main