Ciaran O'Malley / Mbed 2 deprecated Lab_2_5_Threads

Lab 2.5

Dependencies:   mbed mbed-rtos C12832_lcd LCD_fonts

main.cpp@4:682b2fc13702, 2020-07-31 (annotated)

Committer:
ciaranom
Date:
Fri Jul 31 15:34:31 2020 +0000
Revision:
4:682b2fc13702
Parent:
3:3ec443c0842a 
Lab 2.5

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
ciaranom 4:682b2fc13702 13
ciaranom 4:682b2fc13702 14 BusIn joy(p15,p12,p13,p16);
ciaranom 4:682b2fc13702 15 DigitalIn fire(p14);
ciaranom 4:682b2fc13702 16
ciaranom 4:682b2fc13702 17 BusOut leds(LED1,LED2,LED3,LED4);
ciaranom 4:682b2fc13702 18
ciaranom 4:682b2fc13702 19
dreschpe 0:f6a57b843f79 20 // LCD object
dreschpe 3:3ec443c0842a 21 C12832_LCD LCD;
dreschpe 0:f6a57b843f79 22
dreschpe 1:1c6a9eaf55b5 23 AnalogIn Pot1(p19);
dreschpe 1:1c6a9eaf55b5 24 AnalogIn Pot2(p20);
dreschpe 0:f6a57b843f79 25
dreschpe 2:a69c8c5f5b03 26
dreschpe 2:a69c8c5f5b03 27 // mutex to make the lcd lib thread save
dreschpe 1:1c6a9eaf55b5 28 Mutex lcd_mutex;
dreschpe 0:f6a57b843f79 29
dreschpe 2:a69c8c5f5b03 30 // Thread 1
dreschpe 2:a69c8c5f5b03 31 // print counter into first line and wait for 1 s
dreschpe 0:f6a57b843f79 32 void thread1(void const *args)
dreschpe 0:f6a57b843f79 33 {
dreschpe 0:f6a57b843f79 34 int i;
dreschpe 0:f6a57b843f79 35 while(true) { // thread loop
dreschpe 2:a69c8c5f5b03 36 lcd_mutex.lock();
dreschpe 0:f6a57b843f79 37 LCD.locate(0,0);
dreschpe 0:f6a57b843f79 38 LCD.set_font((unsigned char*) Small_6);
dreschpe 3:3ec443c0842a 39 LCD.printf("Thread1 count: %d",i);
dreschpe 2:a69c8c5f5b03 40 lcd_mutex.unlock();
dreschpe 0:f6a57b843f79 41 i++;
dreschpe 0:f6a57b843f79 42 Thread::wait(1000);
dreschpe 0:f6a57b843f79 43 }
dreschpe 0:f6a57b843f79 44 }
dreschpe 0:f6a57b843f79 45
dreschpe 2:a69c8c5f5b03 46 // Thread 2
dreschpe 2:a69c8c5f5b03 47 // print counter into third line and wait for 0,5s
dreschpe 0:f6a57b843f79 48 void thread2(void const *args)
dreschpe 0:f6a57b843f79 49 {
dreschpe 1:1c6a9eaf55b5 50 int k;
dreschpe 0:f6a57b843f79 51 while(true) { // thread loop
dreschpe 2:a69c8c5f5b03 52 lcd_mutex.lock();
dreschpe 0:f6a57b843f79 53 LCD.locate(0,20);
dreschpe 0:f6a57b843f79 54 LCD.set_font((unsigned char*) Arial_9);
dreschpe 3:3ec443c0842a 55 LCD.printf("Thread 2 count : %d",k);
dreschpe 2:a69c8c5f5b03 56 lcd_mutex.unlock();
dreschpe 1:1c6a9eaf55b5 57 k++;
dreschpe 2:a69c8c5f5b03 58 Thread::wait(500); // wait 0.5s
dreschpe 0:f6a57b843f79 59 }
dreschpe 0:f6a57b843f79 60 }
dreschpe 0:f6a57b843f79 61
dreschpe 2:a69c8c5f5b03 62 // Thread 3
dreschpe 2:a69c8c5f5b03 63 // print a sin function in a small window
dreschpe 2:a69c8c5f5b03 64 // the value of pot 1 change the speed of the sinwave
dreschpe 2:a69c8c5f5b03 65 void thread3(void const *args)
dreschpe 1:1c6a9eaf55b5 66 {
dreschpe 1:1c6a9eaf55b5 67 int i,k,v;
dreschpe 1:1c6a9eaf55b5 68 double s,a;
dreschpe 1:1c6a9eaf55b5 69 k = 1;
dreschpe 2:a69c8c5f5b03 70 lcd_mutex.lock();
dreschpe 1:1c6a9eaf55b5 71 LCD.rect(89,0,127,17,1);
dreschpe 2:a69c8c5f5b03 72 lcd_mutex.unlock();
dreschpe 1:1c6a9eaf55b5 73 while(true) { // thread loop
dreschpe 1:1c6a9eaf55b5 74 v = Pot1.read_u16(); // get value of pot 1
dreschpe 2:a69c8c5f5b03 75 lcd_mutex.lock();
dreschpe 1:1c6a9eaf55b5 76 for (i=90; i<127; i++) {
dreschpe 2:a69c8c5f5b03 77 s = 8 * sin((long double)(i+k) /5); // pixel to print
dreschpe 2:a69c8c5f5b03 78 a = 8 * sin((long double)(i+k-1) /5); // old pixel to erase
dreschpe 2:a69c8c5f5b03 79 LCD.pixel(i,9 + (int)a ,0); // erase pixel
dreschpe 2:a69c8c5f5b03 80 LCD.pixel(i,9 + (int)s ,1); // print pixel
dreschpe 1:1c6a9eaf55b5 81 }
dreschpe 2:a69c8c5f5b03 82 LCD.copy_to_lcd(); // LCD.pixel do not update the lcd
dreschpe 2:a69c8c5f5b03 83 lcd_mutex.unlock();
dreschpe 1:1c6a9eaf55b5 84 k++;
dreschpe 2:a69c8c5f5b03 85 Thread::wait(v/100); // value of pot1 / 100
dreschpe 1:1c6a9eaf55b5 86 }
dreschpe 1:1c6a9eaf55b5 87 }
dreschpe 0:f6a57b843f79 88
dreschpe 2:a69c8c5f5b03 89 // Thread 4
dreschpe 2:a69c8c5f5b03 90 // input pot 2 and change the contrast of lcd
dreschpe 2:a69c8c5f5b03 91 void thread4(void const *args)
dreschpe 1:1c6a9eaf55b5 92 {
dreschpe 1:1c6a9eaf55b5 93 int k;
dreschpe 1:1c6a9eaf55b5 94 while(true) { // thread loop
dreschpe 1:1c6a9eaf55b5 95 k = Pot2.read_u16(); // get the value of poti 2
dreschpe 2:a69c8c5f5b03 96 k = k >> 10; // we need only 6 bit for contrast
dreschpe 2:a69c8c5f5b03 97 lcd_mutex.lock();
dreschpe 1:1c6a9eaf55b5 98 LCD.set_contrast(k);
dreschpe 2:a69c8c5f5b03 99 lcd_mutex.unlock();
dreschpe 2:a69c8c5f5b03 100 Thread::wait(500); // wait 0.5s
dreschpe 1:1c6a9eaf55b5 101 }
dreschpe 1:1c6a9eaf55b5 102 }
dreschpe 1:1c6a9eaf55b5 103
dreschpe 2:a69c8c5f5b03 104
ciaranom 4:682b2fc13702 105
ciaranom 4:682b2fc13702 106
ciaranom 4:682b2fc13702 107
dreschpe 2:a69c8c5f5b03 108 // print the actual contrast
dreschpe 0:f6a57b843f79 109 int main()
dreschpe 0:f6a57b843f79 110 {
dreschpe 0:f6a57b843f79 111 int j;
dreschpe 2:a69c8c5f5b03 112 LCD.cls();
dreschpe 2:a69c8c5f5b03 113
dreschpe 2:a69c8c5f5b03 114 Thread t1(thread1); //start thread1
dreschpe 2:a69c8c5f5b03 115 Thread t2(thread2); //start thread2
dreschpe 2:a69c8c5f5b03 116 Thread t3(thread3); //start thread3
dreschpe 2:a69c8c5f5b03 117 Thread t4(thread4); //start thread4
dreschpe 0:f6a57b843f79 118
dreschpe 2:a69c8c5f5b03 119 while(true) { // main is the next thread
dreschpe 2:a69c8c5f5b03 120 lcd_mutex.lock();
dreschpe 1:1c6a9eaf55b5 121 LCD.locate(0,9);
dreschpe 0:f6a57b843f79 122 LCD.set_font((unsigned char*) Small_7);
dreschpe 2:a69c8c5f5b03 123 j = LCD.get_contrast(); // read the actual contrast
dreschpe 3:3ec443c0842a 124 LCD.printf("contrast : %d",j);
dreschpe 2:a69c8c5f5b03 125 lcd_mutex.unlock();
dreschpe 2:a69c8c5f5b03 126 Thread::wait(500); // wait 0.5s
ciaranom 4:682b2fc13702 127 if (fire) { //New code imported to control LEDs with joystick
ciaranom 4:682b2fc13702 128 leds=0xf;
ciaranom 4:682b2fc13702 129 } else {
ciaranom 4:682b2fc13702 130 leds=joy;
ciaranom 4:682b2fc13702 131 }
ciaranom 4:682b2fc13702 132 wait(0.1);
dreschpe 0:f6a57b843f79 133 }
dreschpe 1:1c6a9eaf55b5 134
dreschpe 0:f6a57b843f79 135 }