main.cpp

00001 // example to test the mbed Lab Board lcd lib with the mbed rtos
00002 // Pot1 changes the contrast
00003 // Pot2 changes the speed of the sin wave
00004 
00005 #include "mbed.h"
00006 #include "rtos.h"
00007 #include "Small_6.h"
00008 #include "Small_7.h"
00009 #include "Arial_9.h"
00010 #include "stdio.h"
00011 #include "C12832_lcd.h"
00012 
00013 
00014 C12832_LCD LCD;
00015 AnalogIn Pot1(p19);
00016 AnalogIn Pot2(p20);
00017 PwmOut Speaker(p26);
00018 PwmOut RGBLED_r(p23);
00019 PwmOut RGBLED_g(p24);
00020 PwmOut RGBLED_b(p25);
00021 DigitalIn joyfire(p14);
00022 BusIn joy(p15,p12,p13,p16);
00023 BusOut leds(LED1,LED2,LED3,LED4);
00024 
00025 // mutex to make the lcd lib thread safe
00026 Mutex lcd_mutex;
00027 
00028 // Thread 1
00029 // print counter into first line and wait for 1 s
00030 void thread1(void const *args)
00031 {
00032     int i;
00033     while(true) {       // thread loop
00034         lcd_mutex.lock();
00035         LCD.locate(0,0);
00036         LCD.set_font((unsigned char*) Small_6);
00037         LCD.printf("Thread1 count: %d",i);
00038         lcd_mutex.unlock();
00039         i++;
00040         Thread::wait(1000);
00041     }
00042 }
00043 
00044 // Thread 2
00045 // print counter into third line and wait for 0,5s
00046 void thread2(void const *args)
00047 {
00048     int k;
00049     while(true) {       // thread loop
00050         lcd_mutex.lock();
00051         LCD.locate(0,20);
00052         LCD.set_font((unsigned char*) Arial_9);
00053         LCD.printf("Thread 2 count : %d",k);
00054         lcd_mutex.unlock();
00055         k++;
00056         Thread::wait(500); // wait 0.5s
00057     }
00058 }
00059 
00060 // Thread 3
00061 // print a sin function in a small window
00062 // the value of pot 1 changes the speed of the sine wave
00063 void thread3(void const *args)
00064 {
00065     int i,k,v;
00066     double s,a;
00067     k = 1;
00068     lcd_mutex.lock();
00069     LCD.rect(89,0,127,17,1);
00070     lcd_mutex.unlock();
00071     while(true) {       // thread loop
00072         v = Pot1.read_u16();  // get value of pot 1
00073         lcd_mutex.lock();
00074         for (i=90; i<127; i++) {
00075             s = 8 * sin((long double)(i+k) /5);   // pixel to print
00076             a = 8 * sin((long double)(i+k-1) /5); // old pixel to erase
00077             LCD.pixel(i,9 + (int)a ,0);           // erase pixel
00078             LCD.pixel(i,9 + (int)s ,1);           // print pixel
00079         }
00080         LCD.copy_to_lcd();  // LCD.pixel does not update the lcd
00081         lcd_mutex.unlock();
00082         k++;
00083         Thread::wait(v/100);   // value of pot1 / 100
00084     }
00085 }
00086 
00087 // Thread 4
00088 // input pot 2 and change the contrast of LCD
00089 void thread4(void const *args)
00090 {
00091     int k;
00092     while(true) {         // thread loop
00093         k = Pot2.read_u16();  // get the value of poti 2
00094         k = k >> 10;          // need only 6 bits for contrast
00095         lcd_mutex.lock();
00096         LCD.set_contrast(k);
00097         lcd_mutex.unlock();
00098         Thread::wait(500);    // wait 0.5s
00099     }
00100 }
00101 // Thread 5
00102 // RGB LED
00103 void thread5(void const *args)
00104 {
00105     while(true) {         // thread loop
00106         RGBLED_r = 0.5 + (rand() % 11)/20.0;
00107         RGBLED_g = 0.5 + (rand() % 11)/20.0;
00108         RGBLED_b = 0.5 + (rand() % 11)/20.0;
00109         Thread::wait(1667);    // wait 1.5s
00110     }
00111 }
00112 // Thread 6
00113 // Speaker
00114 void thread6(void const *args)
00115 {
00116     while(true) {         // thread loop
00117         Speaker.period(1.0/800.0);
00118         Speaker = 0.01;
00119         Thread::wait(1000);    // wait 1.0s
00120         Speaker.period(1.0/969.0);
00121         Speaker = 0.01;
00122         Thread::wait(1000);    // wait 1.0s
00123     }
00124 }
00125 
00126 // Thread 7
00127 // Joystick controls onboard mbed LEDs
00128 void thread7(void const *args)
00129 {
00130     while(true) {         // thread loop
00131         if (joyfire) {
00132             leds = 0xf;
00133         } else {
00134             leds = joy;
00135         }
00136         Thread::wait(200);    // wait 0.25s
00137     }
00138 }
00139 
00140 
00141 
00142 int main()
00143 {
00144     int j;
00145     LCD.cls();
00146 
00147     Thread t1(thread1); //start thread1
00148     Thread t2(thread2); //start thread2
00149     Thread t3(thread3); //start thread3
00150     Thread t4(thread4); //start thread4
00151     Thread t5(thread5); //start thread5
00152     Thread t6(thread6); //start thread6
00153     Thread t7(thread7); //start thread7
00154 
00155     while(true) {       // main is the next thread
00156         lcd_mutex.lock();
00157         LCD.locate(0,9);
00158         LCD.set_font((unsigned char*) Small_7);
00159         j = LCD.get_contrast();    // read the actual contrast
00160         LCD.printf("contrast : %d",j);
00161         lcd_mutex.unlock();
00162         Thread::wait(500);   // wait 0.5s
00163     }
00164 }