Krzysztof Krawczyk / Mbed 2 deprecated mech_instrum_lab_1_2_5_threads_and_programming_b

Lab Day 2, Experiment 2.5: Threads and programming

Dependencies:   mbed mbed-rtos C12832_lcd LCD_fonts

main.cpp@4:6b5f8f26d1ed, 2020-08-02 (annotated)

Committer:
t00209054
Date:
Sun Aug 02 11:55:37 2020 +0000
Revision:
4:6b5f8f26d1ed
Parent:
3:3ec443c0842a 
v2

Who changed what in which revision?

UserRevisionLine numberNew contents of line
dreschpe 2:a69c8c5f5b03 1 // example to test the mbed Lab Board lcd lib with the mbed rtos
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 #include "mbed.h"
dreschpe 0:f6a57b843f79 6 #include "rtos.h"
dreschpe 0:f6a57b843f79 7 #include "Small_6.h"
dreschpe 0:f6a57b843f79 8 #include "Small_7.h"
dreschpe 0:f6a57b843f79 9 #include "Arial_9.h"
dreschpe 0:f6a57b843f79 10 #include "stdio.h"
dreschpe 1:1c6a9eaf55b5 11 #include "C12832_lcd.h"
dreschpe 0:f6a57b843f79 12
t00209054 4:6b5f8f26d1ed 13 BusIn joy(p15,p12,p13,p16);
t00209054 4:6b5f8f26d1ed 14 DigitalIn fire(p14);
t00209054 4:6b5f8f26d1ed 15
t00209054 4:6b5f8f26d1ed 16 BusOut leds(LED1,LED2,LED3,LED4);
t00209054 4:6b5f8f26d1ed 17
dreschpe 0:f6a57b843f79 18 // LCD object
dreschpe 3:3ec443c0842a 19 C12832_LCD LCD;
dreschpe 0:f6a57b843f79 20
dreschpe 1:1c6a9eaf55b5 21 AnalogIn Pot1(p19);
dreschpe 1:1c6a9eaf55b5 22 AnalogIn Pot2(p20);
dreschpe 0:f6a57b843f79 23
dreschpe 2:a69c8c5f5b03 24
dreschpe 2:a69c8c5f5b03 25 // mutex to make the lcd lib thread save
dreschpe 1:1c6a9eaf55b5 26 Mutex lcd_mutex;
dreschpe 0:f6a57b843f79 27
dreschpe 2:a69c8c5f5b03 28 // Thread 1
dreschpe 2:a69c8c5f5b03 29 // print counter into first line and wait for 1 s
dreschpe 0:f6a57b843f79 30 void thread1(void const *args)
dreschpe 0:f6a57b843f79 31 {
dreschpe 0:f6a57b843f79 32 int i;
dreschpe 0:f6a57b843f79 33 while(true) { // thread loop
dreschpe 2:a69c8c5f5b03 34 lcd_mutex.lock();
dreschpe 0:f6a57b843f79 35 LCD.locate(0,0);
dreschpe 0:f6a57b843f79 36 LCD.set_font((unsigned char*) Small_6);
dreschpe 3:3ec443c0842a 37 LCD.printf("Thread1 count: %d",i);
dreschpe 2:a69c8c5f5b03 38 lcd_mutex.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 2:a69c8c5f5b03 44 // Thread 2
dreschpe 2:a69c8c5f5b03 45 // print counter into third line and wait for 0,5s
dreschpe 0:f6a57b843f79 46 void thread2(void const *args)
dreschpe 0:f6a57b843f79 47 {
dreschpe 1:1c6a9eaf55b5 48 int k;
dreschpe 0:f6a57b843f79 49 while(true) { // thread loop
dreschpe 2:a69c8c5f5b03 50 lcd_mutex.lock();
dreschpe 0:f6a57b843f79 51 LCD.locate(0,20);
dreschpe 0:f6a57b843f79 52 LCD.set_font((unsigned char*) Arial_9);
dreschpe 3:3ec443c0842a 53 LCD.printf("Thread 2 count : %d",k);
dreschpe 2:a69c8c5f5b03 54 lcd_mutex.unlock();
dreschpe 1:1c6a9eaf55b5 55 k++;
dreschpe 2:a69c8c5f5b03 56 Thread::wait(500); // wait 0.5s
dreschpe 0:f6a57b843f79 57 }
dreschpe 0:f6a57b843f79 58 }
dreschpe 0:f6a57b843f79 59
dreschpe 2:a69c8c5f5b03 60 // Thread 3
dreschpe 2:a69c8c5f5b03 61 // print a sin function in a small window
dreschpe 2:a69c8c5f5b03 62 // the value of pot 1 change the speed of the sinwave
dreschpe 2:a69c8c5f5b03 63 void thread3(void const *args)
dreschpe 1:1c6a9eaf55b5 64 {
dreschpe 1:1c6a9eaf55b5 65 int i,k,v;
dreschpe 1:1c6a9eaf55b5 66 double s,a;
dreschpe 1:1c6a9eaf55b5 67 k = 1;
dreschpe 2:a69c8c5f5b03 68 lcd_mutex.lock();
dreschpe 1:1c6a9eaf55b5 69 LCD.rect(89,0,127,17,1);
dreschpe 2:a69c8c5f5b03 70 lcd_mutex.unlock();
dreschpe 1:1c6a9eaf55b5 71 while(true) { // thread loop
dreschpe 1:1c6a9eaf55b5 72 v = Pot1.read_u16(); // get value of pot 1
dreschpe 2:a69c8c5f5b03 73 lcd_mutex.lock();
dreschpe 1:1c6a9eaf55b5 74 for (i=90; i<127; i++) {
dreschpe 2:a69c8c5f5b03 75 s = 8 * sin((long double)(i+k) /5); // pixel to print
dreschpe 2:a69c8c5f5b03 76 a = 8 * sin((long double)(i+k-1) /5); // old pixel to erase
dreschpe 2:a69c8c5f5b03 77 LCD.pixel(i,9 + (int)a ,0); // erase pixel
dreschpe 2:a69c8c5f5b03 78 LCD.pixel(i,9 + (int)s ,1); // print pixel
dreschpe 1:1c6a9eaf55b5 79 }
dreschpe 2:a69c8c5f5b03 80 LCD.copy_to_lcd(); // LCD.pixel do not update the lcd
dreschpe 2:a69c8c5f5b03 81 lcd_mutex.unlock();
dreschpe 1:1c6a9eaf55b5 82 k++;
dreschpe 2:a69c8c5f5b03 83 Thread::wait(v/100); // value of pot1 / 100
dreschpe 1:1c6a9eaf55b5 84 }
dreschpe 1:1c6a9eaf55b5 85 }
dreschpe 0:f6a57b843f79 86
dreschpe 2:a69c8c5f5b03 87 // Thread 4
dreschpe 2:a69c8c5f5b03 88 // input pot 2 and change the contrast of lcd
dreschpe 2:a69c8c5f5b03 89 void thread4(void const *args)
dreschpe 1:1c6a9eaf55b5 90 {
dreschpe 1:1c6a9eaf55b5 91 int k;
dreschpe 1:1c6a9eaf55b5 92 while(true) { // thread loop
dreschpe 1:1c6a9eaf55b5 93 k = Pot2.read_u16(); // get the value of poti 2
dreschpe 2:a69c8c5f5b03 94 k = k >> 10; // we need only 6 bit for contrast
dreschpe 2:a69c8c5f5b03 95 lcd_mutex.lock();
dreschpe 1:1c6a9eaf55b5 96 LCD.set_contrast(k);
dreschpe 2:a69c8c5f5b03 97 lcd_mutex.unlock();
dreschpe 2:a69c8c5f5b03 98 Thread::wait(500); // wait 0.5s
dreschpe 1:1c6a9eaf55b5 99 }
dreschpe 1:1c6a9eaf55b5 100 }
dreschpe 1:1c6a9eaf55b5 101
t00209054 4:6b5f8f26d1ed 102 // Thread 5
t00209054 4:6b5f8f26d1ed 103 // input joystick to control LED lights
t00209054 4:6b5f8f26d1ed 104 void thread5(void const *args)
t00209054 4:6b5f8f26d1ed 105 {
t00209054 4:6b5f8f26d1ed 106 while(1) {
t00209054 4:6b5f8f26d1ed 107 if (fire) {
t00209054 4:6b5f8f26d1ed 108 leds=0xf;
t00209054 4:6b5f8f26d1ed 109 } else {
t00209054 4:6b5f8f26d1ed 110 leds=joy;
t00209054 4:6b5f8f26d1ed 111 }
t00209054 4:6b5f8f26d1ed 112 wait(0.1);
t00209054 4:6b5f8f26d1ed 113 }
t00209054 4:6b5f8f26d1ed 114 }
dreschpe 2:a69c8c5f5b03 115
dreschpe 2:a69c8c5f5b03 116 // print the actual contrast
dreschpe 0:f6a57b843f79 117 int main()
dreschpe 0:f6a57b843f79 118 {
dreschpe 0:f6a57b843f79 119 int j;
dreschpe 2:a69c8c5f5b03 120 LCD.cls();
dreschpe 2:a69c8c5f5b03 121
dreschpe 2:a69c8c5f5b03 122 Thread t1(thread1); //start thread1
dreschpe 2:a69c8c5f5b03 123 Thread t2(thread2); //start thread2
dreschpe 2:a69c8c5f5b03 124 Thread t3(thread3); //start thread3
dreschpe 2:a69c8c5f5b03 125 Thread t4(thread4); //start thread4
dreschpe 0:f6a57b843f79 126
dreschpe 2:a69c8c5f5b03 127 while(true) { // main is the next thread
dreschpe 2:a69c8c5f5b03 128 lcd_mutex.lock();
dreschpe 1:1c6a9eaf55b5 129 LCD.locate(0,9);
dreschpe 0:f6a57b843f79 130 LCD.set_font((unsigned char*) Small_7);
dreschpe 2:a69c8c5f5b03 131 j = LCD.get_contrast(); // read the actual contrast
dreschpe 3:3ec443c0842a 132 LCD.printf("contrast : %d",j);
dreschpe 2:a69c8c5f5b03 133 lcd_mutex.unlock();
dreschpe 2:a69c8c5f5b03 134 Thread::wait(500); // wait 0.5s
dreschpe 0:f6a57b843f79 135 }
dreschpe 1:1c6a9eaf55b5 136
dreschpe 0:f6a57b843f79 137 }