Tony Kennedy / Mbed 2 deprecated lab1

2.5 Threads and programming Lab question

Dependencies:   mbed mbed-rtos C12832_lcd LCD_fonts

main.cpp@4:744e2ae36e4e, 2020-06-25 (annotated)

Committer:
tonyk37
Date:
Thu Jun 25 11:30:01 2020 +0000
Revision:
4:744e2ae36e4e
Parent:
3:3ec443c0842a 
Threads and programming

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
dreschpe 0:f6a57b843f79 13 // LCD object
dreschpe 3:3ec443c0842a 14 C12832_LCD LCD;
dreschpe 0:f6a57b843f79 15
dreschpe 1:1c6a9eaf55b5 16 AnalogIn Pot1(p19);
dreschpe 1:1c6a9eaf55b5 17 AnalogIn Pot2(p20);
tonyk37 4:744e2ae36e4e 18 BusIn joy(p15,p12,p13,p16);
tonyk37 4:744e2ae36e4e 19 DigitalIn fire(p14);
tonyk37 4:744e2ae36e4e 20
tonyk37 4:744e2ae36e4e 21 BusOut leds(LED1,LED2,LED3,LED4);
dreschpe 0:f6a57b843f79 22
dreschpe 2:a69c8c5f5b03 23
dreschpe 2:a69c8c5f5b03 24 // mutex to make the lcd lib thread save
dreschpe 1:1c6a9eaf55b5 25 Mutex lcd_mutex;
dreschpe 0:f6a57b843f79 26
dreschpe 2:a69c8c5f5b03 27 // Thread 1
dreschpe 2:a69c8c5f5b03 28 // print counter into first line and wait for 1 s
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 2:a69c8c5f5b03 33 lcd_mutex.lock();
dreschpe 0:f6a57b843f79 34 LCD.locate(0,0);
dreschpe 0:f6a57b843f79 35 LCD.set_font((unsigned char*) Small_6);
dreschpe 3:3ec443c0842a 36 LCD.printf("Thread1 count: %d",i);
dreschpe 2:a69c8c5f5b03 37 lcd_mutex.unlock();
dreschpe 0:f6a57b843f79 38 i++;
dreschpe 0:f6a57b843f79 39 Thread::wait(1000);
dreschpe 0:f6a57b843f79 40 }
dreschpe 0:f6a57b843f79 41 }
dreschpe 0:f6a57b843f79 42
dreschpe 2:a69c8c5f5b03 43 // Thread 2
dreschpe 2:a69c8c5f5b03 44 // print counter 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 2:a69c8c5f5b03 49 lcd_mutex.lock();
dreschpe 0:f6a57b843f79 50 LCD.locate(0,20);
dreschpe 0:f6a57b843f79 51 LCD.set_font((unsigned char*) Arial_9);
dreschpe 3:3ec443c0842a 52 LCD.printf("Thread 2 count : %d",k);
dreschpe 2:a69c8c5f5b03 53 lcd_mutex.unlock();
dreschpe 1:1c6a9eaf55b5 54 k++;
dreschpe 2:a69c8c5f5b03 55 Thread::wait(500); // wait 0.5s
dreschpe 0:f6a57b843f79 56 }
dreschpe 0:f6a57b843f79 57 }
dreschpe 0:f6a57b843f79 58
dreschpe 2:a69c8c5f5b03 59 // Thread 3
dreschpe 2:a69c8c5f5b03 60 // print a sin function in a small window
dreschpe 2:a69c8c5f5b03 61 // the value of pot 1 change the speed of the sinwave
dreschpe 2:a69c8c5f5b03 62 void thread3(void const *args)
dreschpe 1:1c6a9eaf55b5 63 {
dreschpe 1:1c6a9eaf55b5 64 int i,k,v;
dreschpe 1:1c6a9eaf55b5 65 double s,a;
dreschpe 1:1c6a9eaf55b5 66 k = 1;
dreschpe 2:a69c8c5f5b03 67 lcd_mutex.lock();
dreschpe 1:1c6a9eaf55b5 68 LCD.rect(89,0,127,17,1);
dreschpe 2:a69c8c5f5b03 69 lcd_mutex.unlock();
dreschpe 1:1c6a9eaf55b5 70 while(true) { // thread loop
dreschpe 1:1c6a9eaf55b5 71 v = Pot1.read_u16(); // get value of pot 1
dreschpe 2:a69c8c5f5b03 72 lcd_mutex.lock();
dreschpe 1:1c6a9eaf55b5 73 for (i=90; i<127; i++) {
dreschpe 2:a69c8c5f5b03 74 s = 8 * sin((long double)(i+k) /5); // pixel to print
dreschpe 2:a69c8c5f5b03 75 a = 8 * sin((long double)(i+k-1) /5); // old pixel to erase
dreschpe 2:a69c8c5f5b03 76 LCD.pixel(i,9 + (int)a ,0); // erase pixel
dreschpe 2:a69c8c5f5b03 77 LCD.pixel(i,9 + (int)s ,1); // print pixel
dreschpe 1:1c6a9eaf55b5 78 }
dreschpe 2:a69c8c5f5b03 79 LCD.copy_to_lcd(); // LCD.pixel do not update the lcd
dreschpe 2:a69c8c5f5b03 80 lcd_mutex.unlock();
dreschpe 1:1c6a9eaf55b5 81 k++;
dreschpe 2:a69c8c5f5b03 82 Thread::wait(v/100); // value of pot1 / 100
dreschpe 1:1c6a9eaf55b5 83 }
dreschpe 1:1c6a9eaf55b5 84 }
dreschpe 0:f6a57b843f79 85
dreschpe 2:a69c8c5f5b03 86 // Thread 4
dreschpe 2:a69c8c5f5b03 87 // input pot 2 and change the contrast of lcd
dreschpe 2:a69c8c5f5b03 88 void thread4(void const *args)
dreschpe 1:1c6a9eaf55b5 89 {
dreschpe 1:1c6a9eaf55b5 90 int k;
dreschpe 1:1c6a9eaf55b5 91 while(true) { // thread loop
dreschpe 1:1c6a9eaf55b5 92 k = Pot2.read_u16(); // get the value of poti 2
dreschpe 2:a69c8c5f5b03 93 k = k >> 10; // we need only 6 bit for contrast
dreschpe 2:a69c8c5f5b03 94 lcd_mutex.lock();
dreschpe 1:1c6a9eaf55b5 95 LCD.set_contrast(k);
dreschpe 2:a69c8c5f5b03 96 lcd_mutex.unlock();
dreschpe 2:a69c8c5f5b03 97 Thread::wait(500); // wait 0.5s
dreschpe 1:1c6a9eaf55b5 98 }
dreschpe 1:1c6a9eaf55b5 99 }
dreschpe 1:1c6a9eaf55b5 100
tonyk37 4:744e2ae36e4e 101 //Thread 5
tonyk37 4:744e2ae36e4e 102 // input joystick control for LED
tonyk37 4:744e2ae36e4e 103 void thread5(void const *args)
tonyk37 4:744e2ae36e4e 104 {
tonyk37 4:744e2ae36e4e 105 while(1) {
tonyk37 4:744e2ae36e4e 106 if (fire) {
tonyk37 4:744e2ae36e4e 107 leds=0xf;
tonyk37 4:744e2ae36e4e 108 } else {
tonyk37 4:744e2ae36e4e 109 leds=joy;
tonyk37 4:744e2ae36e4e 110 }
tonyk37 4:744e2ae36e4e 111 wait(0.1);
tonyk37 4:744e2ae36e4e 112 }
tonyk37 4:744e2ae36e4e 113 }
dreschpe 2:a69c8c5f5b03 114 // print the actual contrast
dreschpe 0:f6a57b843f79 115 int main()
dreschpe 0:f6a57b843f79 116 {
dreschpe 0:f6a57b843f79 117 int j;
dreschpe 2:a69c8c5f5b03 118 LCD.cls();
dreschpe 2:a69c8c5f5b03 119
dreschpe 2:a69c8c5f5b03 120 Thread t1(thread1); //start thread1
dreschpe 2:a69c8c5f5b03 121 Thread t2(thread2); //start thread2
dreschpe 2:a69c8c5f5b03 122 Thread t3(thread3); //start thread3
dreschpe 2:a69c8c5f5b03 123 Thread t4(thread4); //start thread4
tonyk37 4:744e2ae36e4e 124 Thread t5(thread5); //start thread5
dreschpe 0:f6a57b843f79 125
dreschpe 2:a69c8c5f5b03 126 while(true) { // main is the next thread
dreschpe 2:a69c8c5f5b03 127 lcd_mutex.lock();
dreschpe 1:1c6a9eaf55b5 128 LCD.locate(0,9);
dreschpe 0:f6a57b843f79 129 LCD.set_font((unsigned char*) Small_7);
dreschpe 2:a69c8c5f5b03 130 j = LCD.get_contrast(); // read the actual contrast
dreschpe 3:3ec443c0842a 131 LCD.printf("contrast : %d",j);
dreschpe 2:a69c8c5f5b03 132 lcd_mutex.unlock();
dreschpe 2:a69c8c5f5b03 133 Thread::wait(500); // wait 0.5s
dreschpe 0:f6a57b843f79 134 }
dreschpe 1:1c6a9eaf55b5 135
dreschpe 0:f6a57b843f79 136 }