Nicholas Outram / Mbed OS Task633Solution-mbedos54

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main.cpp@6:2e463846b575, 2016-03-14 (annotated)

Committer:
noutram
Date:
Mon Mar 14 16:30:25 2016 +0000
Revision:
6:2e463846b575
Parent:
5:31707531f715
Child:
7:cd015e83995a
Comparing a yielding wait and a spinning-wait

Who changed what in which revision?

UserRevisionLine numberNew contents of line
noutram 0:f916cefba2f4 1 #include "mbed.h"
noutram 0:f916cefba2f4 2 #include "rtos.h"
noutram 2:70084af839d3 3 #include "string.h"
noutram 2:70084af839d3 4 #include <stdio.h>
noutram 2:70084af839d3 5 #include <ctype.h>
noutram 0:f916cefba2f4 6
noutram 4:dae8898e55fe 7 #define DELAY 200
noutram 0:f916cefba2f4 8
noutram 0:f916cefba2f4 9 //Digital outputs
noutram 0:f916cefba2f4 10 DigitalOut onBoardLED(LED1);
noutram 0:f916cefba2f4 11 DigitalOut redLED(D7);
noutram 0:f916cefba2f4 12 DigitalOut yellowLED(D6);
noutram 0:f916cefba2f4 13 DigitalOut greenLED(D5);
noutram 0:f916cefba2f4 14
noutram 2:70084af839d3 15 //Serial Interface
noutram 2:70084af839d3 16 Serial pc(USBTX, USBRX);
noutram 2:70084af839d3 17
noutram 0:f916cefba2f4 18 //Digital inputs
noutram 0:f916cefba2f4 19 DigitalIn onBoardSwitch(USER_BUTTON);
noutram 0:f916cefba2f4 20 DigitalIn SW1(D4);
noutram 0:f916cefba2f4 21 DigitalIn SW2(D3);
noutram 0:f916cefba2f4 22
noutram 0:f916cefba2f4 23 //Thread ID for the Main function (CMSIS API)
noutram 0:f916cefba2f4 24 osThreadId tidMain;
noutram 0:f916cefba2f4 25
noutram 4:dae8898e55fe 26 void thread1( const void* arg )
noutram 4:dae8898e55fe 27 {
noutram 4:dae8898e55fe 28 pc.printf("Entering thread 1\n");
noutram 4:dae8898e55fe 29 while (true) {
noutram 5:31707531f715 30 yellowLED = 1;
noutram 6:2e463846b575 31 Thread::wait(DELAY);
noutram 5:31707531f715 32 yellowLED = 0;
noutram 6:2e463846b575 33 Thread::wait(DELAY);
noutram 4:dae8898e55fe 34 }
noutram 2:70084af839d3 35 }
noutram 2:70084af839d3 36
noutram 6:2e463846b575 37 //This thread has higher priority
noutram 4:dae8898e55fe 38 void thread2( const void* arg )
noutram 0:f916cefba2f4 39 {
noutram 4:dae8898e55fe 40 pc.printf("Entering thread 2\n");
noutram 2:70084af839d3 41 while (true) {
noutram 5:31707531f715 42 redLED = 1;
noutram 6:2e463846b575 43 if (SW1 == 1) {
noutram 6:2e463846b575 44 //wait_ms(osWaitForever);
noutram 6:2e463846b575 45 Thread::wait(osWaitForever);
noutram 6:2e463846b575 46 } else {
noutram 6:2e463846b575 47 Thread::wait(DELAY);
noutram 6:2e463846b575 48 }
noutram 5:31707531f715 49 redLED = 0;
noutram 6:2e463846b575 50 Thread::wait(DELAY);
noutram 6:2e463846b575 51 }
noutram 0:f916cefba2f4 52 }
noutram 0:f916cefba2f4 53
noutram 4:dae8898e55fe 54
noutram 0:f916cefba2f4 55 //Main thread
noutram 0:f916cefba2f4 56 int main() {
noutram 0:f916cefba2f4 57 redLED = 0;
noutram 0:f916cefba2f4 58 yellowLED = 0;
noutram 2:70084af839d3 59 greenLED = 0;
noutram 4:dae8898e55fe 60
noutram 0:f916cefba2f4 61 //Main thread ID
noutram 0:f916cefba2f4 62 tidMain = Thread::gettid();
noutram 0:f916cefba2f4 63
noutram 4:dae8898e55fe 64 //Threads
noutram 6:2e463846b575 65 Thread t1(thread1, NULL, osPriorityNormal);
noutram 6:2e463846b575 66 //Thread t2(thread2, NULL, osPriorityNormal);
noutram 6:2e463846b575 67 Thread t2(thread2, NULL, osPriorityAboveNormal);
noutram 1:4fb27aea76b2 68
noutram 4:dae8898e55fe 69 pc.printf("Main Thread\n");
noutram 2:70084af839d3 70 while (true) {
noutram 4:dae8898e55fe 71 Thread::wait(osWaitForever);
noutram 0:f916cefba2f4 72 }
noutram 0:f916cefba2f4 73
noutram 0:f916cefba2f4 74 }
noutram 2:70084af839d3 75
noutram 2:70084af839d3 76