jim hamblen / Mbed 2 deprecated app-board-RTOS-Threads

This demo uses the mbed RTOS to run eight threads (including main). The threads are using different I/O devices on the application board. Several of the threads output to the LCD and an OS mutex lock is used to control access to the LCD and make the LCD thread safe.

Dependencies:   C12832_lcd LCD_fonts mbed-rtos mbed

Fork of lab1 by Peter Drescher

main.cpp@1:1c6a9eaf55b5, 2012-10-16 (annotated)

Committer:
dreschpe
Date:
Tue Oct 16 17:51:10 2012 +0000
Revision:
1:1c6a9eaf55b5
Parent:
0:f6a57b843f79
Child:
2:a69c8c5f5b03
ver 1

Who changed what in which revision?

UserRevisionLine numberNew contents of line
dreschpe 0:f6a57b843f79 1 // example to test the mbed Lab Board lcd
dreschpe 1:1c6a9eaf55b5 2 // Pot1 change the contrast
dreschpe 1:1c6a9eaf55b5 3 // Pot2 change the speed of the sin wave
dreschpe 1:1c6a9eaf55b5 4
dreschpe 0:f6a57b843f79 5
dreschpe 0:f6a57b843f79 6 #include "mbed.h"
dreschpe 0:f6a57b843f79 7 #include "rtos.h"
dreschpe 0:f6a57b843f79 8 #include "Small_6.h"
dreschpe 0:f6a57b843f79 9 #include "Small_7.h"
dreschpe 0:f6a57b843f79 10 #include "Arial_9.h"
dreschpe 0:f6a57b843f79 11 #include "stdio.h"
dreschpe 1:1c6a9eaf55b5 12 #include "C12832_lcd.h"
dreschpe 0:f6a57b843f79 13
dreschpe 0:f6a57b843f79 14 Serial pc(USBTX, USBRX);
dreschpe 0:f6a57b843f79 15
dreschpe 0:f6a57b843f79 16
dreschpe 0:f6a57b843f79 17 // LCD object
dreschpe 0:f6a57b843f79 18 C12832_LCD LCD("LCD");
dreschpe 0:f6a57b843f79 19
dreschpe 1:1c6a9eaf55b5 20 AnalogIn Pot1(p19);
dreschpe 1:1c6a9eaf55b5 21 AnalogIn Pot2(p20);
dreschpe 0:f6a57b843f79 22
dreschpe 1:1c6a9eaf55b5 23 // defines to make lib thread save
dreschpe 1:1c6a9eaf55b5 24 #define _lock lcd_mutex.lock();
dreschpe 1:1c6a9eaf55b5 25 #define _unlock lcd_mutex.unlock();
dreschpe 1:1c6a9eaf55b5 26 Mutex lcd_mutex;
dreschpe 0:f6a57b843f79 27
dreschpe 0:f6a57b843f79 28 // print data into first line and wait for 1s
dreschpe 0:f6a57b843f79 29 void thread1(void const *args)
dreschpe 0:f6a57b843f79 30 {
dreschpe 0:f6a57b843f79 31 int i;
dreschpe 0:f6a57b843f79 32 while(true) { // thread loop
dreschpe 0:f6a57b843f79 33 _lock
dreschpe 0:f6a57b843f79 34 LCD.locate(0,0);
dreschpe 0:f6a57b843f79 35 LCD.set_font((unsigned char*) Small_6);
dreschpe 1:1c6a9eaf55b5 36 printf("Thread1 count: %d",i);
dreschpe 0:f6a57b843f79 37 LCD.copy_to_lcd();
dreschpe 0:f6a57b843f79 38 _unlock
dreschpe 0:f6a57b843f79 39 i++;
dreschpe 0:f6a57b843f79 40 Thread::wait(1000);
dreschpe 0:f6a57b843f79 41 }
dreschpe 0:f6a57b843f79 42 }
dreschpe 0:f6a57b843f79 43
dreschpe 0:f6a57b843f79 44 // print data into third line and wait for 0,5s
dreschpe 0:f6a57b843f79 45 void thread2(void const *args)
dreschpe 0:f6a57b843f79 46 {
dreschpe 1:1c6a9eaf55b5 47 int k;
dreschpe 0:f6a57b843f79 48 while(true) { // thread loop
dreschpe 0:f6a57b843f79 49 _lock
dreschpe 0:f6a57b843f79 50 LCD.locate(0,20);
dreschpe 0:f6a57b843f79 51 LCD.set_font((unsigned char*) Arial_9);
dreschpe 1:1c6a9eaf55b5 52 printf("Thread 2 count : %d",k);
dreschpe 0:f6a57b843f79 53 LCD.copy_to_lcd();
dreschpe 0:f6a57b843f79 54 _unlock
dreschpe 1:1c6a9eaf55b5 55 k++;
dreschpe 0:f6a57b843f79 56 Thread::wait(500);
dreschpe 0:f6a57b843f79 57 }
dreschpe 0:f6a57b843f79 58 }
dreschpe 0:f6a57b843f79 59
dreschpe 0:f6a57b843f79 60
dreschpe 1:1c6a9eaf55b5 61 void thread4(void const *args)
dreschpe 1:1c6a9eaf55b5 62 {
dreschpe 1:1c6a9eaf55b5 63 int i,k,v;
dreschpe 1:1c6a9eaf55b5 64 double s,a;
dreschpe 1:1c6a9eaf55b5 65 k = 1;
dreschpe 1:1c6a9eaf55b5 66 _lock
dreschpe 1:1c6a9eaf55b5 67 LCD.rect(89,0,127,17,1);
dreschpe 1:1c6a9eaf55b5 68 _unlock
dreschpe 1:1c6a9eaf55b5 69 while(true) { // thread loop
dreschpe 1:1c6a9eaf55b5 70 _lock
dreschpe 1:1c6a9eaf55b5 71 v = Pot1.read_u16(); // get value of pot 1
dreschpe 1:1c6a9eaf55b5 72 for (i=90; i<127; i++) {
dreschpe 1:1c6a9eaf55b5 73 s = 8 * sin((long double)(i+k) /5);
dreschpe 1:1c6a9eaf55b5 74 a = 8 * sin((long double)(i+k-1) /5);
dreschpe 1:1c6a9eaf55b5 75 LCD.pixel(i,9 + (int)a ,0);
dreschpe 1:1c6a9eaf55b5 76 LCD.pixel(i,9 + (int)s ,1);
dreschpe 1:1c6a9eaf55b5 77 }
dreschpe 1:1c6a9eaf55b5 78 LCD.copy_to_lcd();
dreschpe 1:1c6a9eaf55b5 79 _unlock
dreschpe 1:1c6a9eaf55b5 80 k++;
dreschpe 1:1c6a9eaf55b5 81 Thread::wait(v/100);
dreschpe 1:1c6a9eaf55b5 82 }
dreschpe 1:1c6a9eaf55b5 83 }
dreschpe 0:f6a57b843f79 84
dreschpe 0:f6a57b843f79 85
dreschpe 1:1c6a9eaf55b5 86 void thread5(void const *args)
dreschpe 1:1c6a9eaf55b5 87 {
dreschpe 1:1c6a9eaf55b5 88 int k;
dreschpe 1:1c6a9eaf55b5 89 while(true) { // thread loop
dreschpe 1:1c6a9eaf55b5 90 k = Pot2.read_u16(); // get the value of poti 2
dreschpe 1:1c6a9eaf55b5 91 k = k >> 10; // we need only 6 bit
dreschpe 1:1c6a9eaf55b5 92 _lock
dreschpe 1:1c6a9eaf55b5 93 LCD.set_contrast(k);
dreschpe 1:1c6a9eaf55b5 94 _unlock
dreschpe 1:1c6a9eaf55b5 95 Thread::wait(500);
dreschpe 1:1c6a9eaf55b5 96 }
dreschpe 1:1c6a9eaf55b5 97 }
dreschpe 1:1c6a9eaf55b5 98
dreschpe 0:f6a57b843f79 99 int main()
dreschpe 0:f6a57b843f79 100 {
dreschpe 0:f6a57b843f79 101 int j;
dreschpe 0:f6a57b843f79 102
dreschpe 0:f6a57b843f79 103 LCD.claim(stdout); // send stdout to the LCD display
dreschpe 1:1c6a9eaf55b5 104 LCD.cls();
dreschpe 1:1c6a9eaf55b5 105 //start thread1
dreschpe 0:f6a57b843f79 106 Thread t1(thread1);
dreschpe 1:1c6a9eaf55b5 107 //start thread2
dreschpe 0:f6a57b843f79 108 Thread t2(thread2);
dreschpe 1:1c6a9eaf55b5 109 //start thread4
dreschpe 1:1c6a9eaf55b5 110 Thread t4(thread4);
dreschpe 1:1c6a9eaf55b5 111 Thread t5(thread5);
dreschpe 0:f6a57b843f79 112
dreschpe 0:f6a57b843f79 113 while(true) { // this is the third thread
dreschpe 0:f6a57b843f79 114 _lock
dreschpe 1:1c6a9eaf55b5 115 LCD.locate(0,9);
dreschpe 0:f6a57b843f79 116 LCD.set_font((unsigned char*) Small_7);
dreschpe 1:1c6a9eaf55b5 117 j = LCD.get_contrast();
dreschpe 1:1c6a9eaf55b5 118 printf("contrast : %d",j);
dreschpe 0:f6a57b843f79 119 LCD.copy_to_lcd();
dreschpe 0:f6a57b843f79 120 _unlock
dreschpe 1:1c6a9eaf55b5 121 Thread::wait(500);
dreschpe 0:f6a57b843f79 122 }
dreschpe 1:1c6a9eaf55b5 123
dreschpe 0:f6a57b843f79 124 }