Stage-1 Students SoCEM / Mbed OS Task613Solution-mbeds54

Task 6.1.3 updated for mbed OS 5.4

main.cpp@0:90e393878517, 2016-03-08 (annotated)

Committer:
noutram
Date:
Tue Mar 08 11:44:46 2016 +0000
Revision:
0:90e393878517
Child:
1:948bd552a2a2
Task 613

Who changed what in which revision?

UserRevisionLine numberNew contents of line
noutram 0:90e393878517 1 #include "mbed.h"
noutram 0:90e393878517 2 #include "rtos.h"
noutram 0:90e393878517 3
noutram 0:90e393878517 4 #define RED_OFF 1
noutram 0:90e393878517 5 #define YELLOW_OFF 2
noutram 0:90e393878517 6 #define GREEN_OFF 4
noutram 0:90e393878517 7 #define ALL_OFF 7
noutram 0:90e393878517 8
noutram 0:90e393878517 9 //Function declarations
noutram 0:90e393878517 10 void Function1(void const *args);
noutram 0:90e393878517 11 void Function2(void const *args);
noutram 0:90e393878517 12 void Function3(void const *args);
noutram 0:90e393878517 13 void Function4(void const *args);
noutram 0:90e393878517 14
noutram 0:90e393878517 15 //I/O
noutram 0:90e393878517 16 DigitalOut onBoardLED(LED1);
noutram 0:90e393878517 17 DigitalOut redLED(D7);
noutram 0:90e393878517 18 DigitalOut yellowLED(D6);
noutram 0:90e393878517 19 DigitalOut greenLED(D5);
noutram 0:90e393878517 20
noutram 0:90e393878517 21 DigitalIn onBoardSwitch(USER_BUTTON);
noutram 0:90e393878517 22 DigitalIn SW1(D4);
noutram 0:90e393878517 23 DigitalIn SW2(D3);
noutram 0:90e393878517 24
noutram 0:90e393878517 25 Thread* t1;
noutram 0:90e393878517 26 Thread* t2;
noutram 0:90e393878517 27 Thread* t3;
noutram 0:90e393878517 28 Thread* t4;
noutram 0:90e393878517 29
noutram 0:90e393878517 30 //Thread ID
noutram 0:90e393878517 31 osThreadId idMain;
noutram 0:90e393878517 32 osThreadId id1;
noutram 0:90e393878517 33 osThreadId id2;
noutram 0:90e393878517 34 osThreadId id3;
noutram 0:90e393878517 35 osThreadId id4;
noutram 0:90e393878517 36
noutram 0:90e393878517 37 void Function1(void const *args)
noutram 0:90e393878517 38 {
noutram 0:90e393878517 39 while (true) {
noutram 0:90e393878517 40 redLED = !redLED;
noutram 0:90e393878517 41 if (redLED == 0) {
noutram 0:90e393878517 42 t2->signal_set(RED_OFF);
noutram 0:90e393878517 43 }
noutram 0:90e393878517 44 Thread::wait(1000);
noutram 0:90e393878517 45 }
noutram 0:90e393878517 46 }
noutram 0:90e393878517 47
noutram 0:90e393878517 48 void Function2(void const *args)
noutram 0:90e393878517 49 {
noutram 0:90e393878517 50 while (true) {
noutram 0:90e393878517 51 Thread::signal_wait(RED_OFF);
noutram 0:90e393878517 52 yellowLED = !yellowLED;
noutram 0:90e393878517 53 if (yellowLED == 0) {
noutram 0:90e393878517 54 t3->signal_set(YELLOW_OFF);
noutram 0:90e393878517 55 }
noutram 0:90e393878517 56 }
noutram 0:90e393878517 57 }
noutram 0:90e393878517 58
noutram 0:90e393878517 59 //Green Flashing
noutram 0:90e393878517 60 void Function3(void const *args)
noutram 0:90e393878517 61 {
noutram 0:90e393878517 62 while (true) {
noutram 0:90e393878517 63 Thread::signal_wait(YELLOW_OFF);
noutram 0:90e393878517 64 greenLED = !greenLED;
noutram 0:90e393878517 65 if (greenLED == 0) {
noutram 0:90e393878517 66 t4->signal_set(GREEN_OFF);
noutram 0:90e393878517 67 }
noutram 0:90e393878517 68 }
noutram 0:90e393878517 69 }
noutram 0:90e393878517 70
noutram 0:90e393878517 71 //This function waits for signals from all other threads
noutram 0:90e393878517 72 void Function4(void const *args)
noutram 0:90e393878517 73 {
noutram 0:90e393878517 74 while (true) {
noutram 0:90e393878517 75 Thread::signal_wait(GREEN_OFF);
noutram 0:90e393878517 76 //Signal main thread
noutram 0:90e393878517 77 osSignalSet(idMain, ALL_OFF);
noutram 0:90e393878517 78 }
noutram 0:90e393878517 79 }
noutram 0:90e393878517 80
noutram 0:90e393878517 81 //Main thread
noutram 0:90e393878517 82 int main() {
noutram 0:90e393878517 83 redLED = 0;
noutram 0:90e393878517 84 yellowLED = 0;
noutram 0:90e393878517 85 greenLED = 0;
noutram 0:90e393878517 86
noutram 0:90e393878517 87 //Main thread ID
noutram 0:90e393878517 88 idMain = osThreadGetId(); //CMSIS RTOS call
noutram 0:90e393878517 89
noutram 0:90e393878517 90 //Create and run threads
noutram 0:90e393878517 91 t4 = new Thread(Function4);
noutram 0:90e393878517 92 t1 = new Thread(Function1);
noutram 0:90e393878517 93 t2 = new Thread(Function2);
noutram 0:90e393878517 94 t3 = new Thread(Function3); //Dynamically allocated
noutram 0:90e393878517 95
noutram 0:90e393878517 96
noutram 0:90e393878517 97 //Thread ID
noutram 0:90e393878517 98 id1 = t1->gettid();
noutram 0:90e393878517 99 id2 = t2->gettid();
noutram 0:90e393878517 100 id3 = t3->gettid();
noutram 0:90e393878517 101 id4 = t4->gettid();
noutram 0:90e393878517 102
noutram 0:90e393878517 103 while(1) {
noutram 0:90e393878517 104 //Wait for the ALL_ON signal
noutram 0:90e393878517 105 osSignalWait(ALL_OFF,osWaitForever);
noutram 0:90e393878517 106 printf("ALL OFF\n");
noutram 0:90e393878517 107 }
noutram 0:90e393878517 108 }