University of Plymouth - Stages 1, 2 and 3 / Mbed OS Task612-mbedos

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Fork of Task612-mbedos54 by Nicholas Outram

main.cpp@0:69af4e3595b6, 2016-03-08 (annotated)

Committer:
noutram
Date:
Tue Mar 08 11:46:22 2016 +0000
Revision:
0:69af4e3595b6
Child:
1:fdf9ceb4a107
Task 6.1.2

Who changed what in which revision?

UserRevisionLine numberNew contents of line
noutram 0:69af4e3595b6 1 #include "mbed.h"
noutram 0:69af4e3595b6 2 #include "rtos.h"
noutram 0:69af4e3595b6 3
noutram 0:69af4e3595b6 4 #define RED_TOGGLE 1
noutram 0:69af4e3595b6 5 #define YELLOW_TOGGLE 2
noutram 0:69af4e3595b6 6 #define GREEN_TOGGLE 4
noutram 0:69af4e3595b6 7
noutram 0:69af4e3595b6 8 //Function declarations
noutram 0:69af4e3595b6 9 void FunctionRed(void const *args);
noutram 0:69af4e3595b6 10 void FunctionYellow(void const *args);
noutram 0:69af4e3595b6 11 void FunctionGreen(void const *args);
noutram 0:69af4e3595b6 12
noutram 0:69af4e3595b6 13 //I/O
noutram 0:69af4e3595b6 14 DigitalOut onBoardLED(LED1);
noutram 0:69af4e3595b6 15 DigitalOut redLED(D7);
noutram 0:69af4e3595b6 16 DigitalOut yellowLED(D6);
noutram 0:69af4e3595b6 17 DigitalOut greenLED(D5);
noutram 0:69af4e3595b6 18
noutram 0:69af4e3595b6 19 DigitalIn onBoardSwitch(USER_BUTTON);
noutram 0:69af4e3595b6 20 DigitalIn SW1(D4);
noutram 0:69af4e3595b6 21 DigitalIn SW2(D3);
noutram 0:69af4e3595b6 22
noutram 0:69af4e3595b6 23
noutram 0:69af4e3595b6 24 //Each of the following 3 functions is listening for a signal
noutram 0:69af4e3595b6 25 void FunctionRed(void const *args)
noutram 0:69af4e3595b6 26 {
noutram 0:69af4e3595b6 27 while (true) {
noutram 0:69af4e3595b6 28 Thread::signal_wait(RED_TOGGLE);
noutram 0:69af4e3595b6 29 redLED = !redLED;
noutram 0:69af4e3595b6 30 }
noutram 0:69af4e3595b6 31 }
noutram 0:69af4e3595b6 32
noutram 0:69af4e3595b6 33 void FunctionYellow(void const *args)
noutram 0:69af4e3595b6 34 {
noutram 0:69af4e3595b6 35 while (true) {
noutram 0:69af4e3595b6 36 Thread::signal_wait(YELLOW_TOGGLE);
noutram 0:69af4e3595b6 37 yellowLED = !yellowLED;
noutram 0:69af4e3595b6 38 }
noutram 0:69af4e3595b6 39 }
noutram 0:69af4e3595b6 40
noutram 0:69af4e3595b6 41 void FunctionGreen(void const *args)
noutram 0:69af4e3595b6 42 {
noutram 0:69af4e3595b6 43 while (true) {
noutram 0:69af4e3595b6 44 Thread::signal_wait(GREEN_TOGGLE);
noutram 0:69af4e3595b6 45 greenLED = !greenLED;
noutram 0:69af4e3595b6 46 }
noutram 0:69af4e3595b6 47 }
noutram 0:69af4e3595b6 48
noutram 0:69af4e3595b6 49 //Main thread
noutram 0:69af4e3595b6 50 int main() {
noutram 0:69af4e3595b6 51 redLED = 0;
noutram 0:69af4e3595b6 52 yellowLED = 0;
noutram 0:69af4e3595b6 53 greenLED = 0;
noutram 0:69af4e3595b6 54
noutram 0:69af4e3595b6 55 //Create and run threads
noutram 0:69af4e3595b6 56 Thread t1(FunctionRed);
noutram 0:69af4e3595b6 57 Thread t2(FunctionYellow);
noutram 0:69af4e3595b6 58 Thread t3(FunctionGreen);
noutram 0:69af4e3595b6 59
noutram 0:69af4e3595b6 60 //Main loop
noutram 0:69af4e3595b6 61 while(1) {
noutram 0:69af4e3595b6 62
noutram 0:69af4e3595b6 63 //Read stdin (serial port)
noutram 0:69af4e3595b6 64 int selection, hits;
noutram 0:69af4e3595b6 65 char strInput[64];
noutram 0:69af4e3595b6 66 do {
noutram 0:69af4e3595b6 67 puts("Please choose:");
noutram 0:69af4e3595b6 68 puts("1 - Red");
noutram 0:69af4e3595b6 69 puts("2 - Yellow");
noutram 0:69af4e3595b6 70 puts("3 - Green");
noutram 0:69af4e3595b6 71 scanf("%64s", strInput); //Read a string
noutram 0:69af4e3595b6 72 hits = sscanf(strInput, "%d", &selection); //Look for an integer
noutram 0:69af4e3595b6 73 } while (hits != 1); //Repeat if not found
noutram 0:69af4e3595b6 74
noutram 0:69af4e3595b6 75 //Signal the thread
noutram 0:69af4e3595b6 76 switch (selection) {
noutram 0:69af4e3595b6 77 case 1:
noutram 0:69af4e3595b6 78 //Signal thread 1
noutram 0:69af4e3595b6 79 t1.signal_set(RED_TOGGLE);
noutram 0:69af4e3595b6 80 break;
noutram 0:69af4e3595b6 81 case 2:
noutram 0:69af4e3595b6 82 //Signal thread 2
noutram 0:69af4e3595b6 83 t2.signal_set(YELLOW_TOGGLE);
noutram 0:69af4e3595b6 84 break;
noutram 0:69af4e3595b6 85 case 3:
noutram 0:69af4e3595b6 86 //Signal thread 3
noutram 0:69af4e3595b6 87 t3.signal_set(GREEN_TOGGLE);
noutram 0:69af4e3595b6 88 break;
noutram 0:69af4e3595b6 89 default:
noutram 0:69af4e3595b6 90 puts("Invalid option");
noutram 0:69af4e3595b6 91 break;
noutram 0:69af4e3595b6 92 } //end switch
noutram 0:69af4e3595b6 93
noutram 0:69af4e3595b6 94 } //end while
noutram 0:69af4e3595b6 95 } //end main