File content as of revision 5:18b2796e4847:

// example to test the mbed Lab Board lcd lib with the mbed rtos
// Pot1 changes the contrast
// Pot2 changes the speed of the sin wave

#include "mbed.h"
#include "rtos.h"
#include "Small_6.h"
#include "Small_7.h"
#include "Arial_9.h"
#include "stdio.h"
#include "C12832_lcd.h"
#include "sound.h"

#define sample_freq 11025.0
//get and set the frequency from wav conversion tool GUI
int i=0;

Ticker sampletick;
C12832_LCD LCD;
AnalogIn Pot1(p19);
AnalogIn Pot2(p20);
PwmOut Speaker(p26);
PwmOut RGBLED_r(p23);
PwmOut RGBLED_g(p24);
PwmOut RGBLED_b(p25);
DigitalIn joyfire(p14);
BusIn joy(p15,p12,p13,p16);
BusOut leds(LED1,LED2,LED3,LED4);

// mutex to make the lcd lib thread safe
Mutex lcd_mutex;

void audio_sample ()
{

    Speaker = sound_data[i]/255.0;//scale to 0.0 to 1.0 for PWM
    i++;
    if (i>= NUM_ELEMENTS) {
        i = 0;
        sampletick.detach();
    }
}

//
//// Thread 1
//// print counter into first line and wait for 1 s
//void thread1(void const *args)
//{
//    int i;
//    while(true) {       // thread loop
//        lcd_mutex.lock();
//        LCD.locate(0,0);
//        LCD.set_font((unsigned char*) Small_6);
//        LCD.printf("Thread1 count: %d",i);
//        lcd_mutex.unlock();
//        i++;
//        Thread::wait(1000);
//    }
//}
//
//// Thread 2
//// print counter into third line and wait for 0,5s
//void thread2(void const *args)
//{
//    int k;
//    while(true) {       // thread loop
//        lcd_mutex.lock();
//        LCD.locate(0,20);
//        LCD.set_font((unsigned char*) Arial_9);
//        LCD.printf("Thread 2 count : %d",k);
//        lcd_mutex.unlock();
//        k++;
//        Thread::wait(500); // wait 0.5s
//    }
//}
//
//// Thread 3
//// print a sin function in a small window
//// the value of pot 1 changes the speed of the sine wave
//void thread3(void const *args)
//{
//    int i,k,v;
//    double s,a;
//    k = 1;
//    lcd_mutex.lock();
//    LCD.rect(89,0,127,17,1);
//    lcd_mutex.unlock();
//    while(true) {       // thread loop
//        v = Pot1.read_u16();  // get value of pot 1
//        lcd_mutex.lock();
//        for (i=90; i<127; i++) {
//            s = 8 * sin((long double)(i+k) /5);   // pixel to print
//            a = 8 * sin((long double)(i+k-1) /5); // old pixel to erase
//            LCD.pixel(i,9 + (int)a ,0);           // erase pixel
//            LCD.pixel(i,9 + (int)s ,1);           // print pixel
//        }
//        LCD.copy_to_lcd();  // LCD.pixel does not update the lcd
//        lcd_mutex.unlock();
//        k++;
//        Thread::wait(v/100);   // value of pot1 / 100
//    }
//}
//
//// Thread 4
//// input pot 2 and change the contrast of LCD
//void thread4(void const *args)
//{
//    int k;
//    while(true) {         // thread loop
//        k = Pot2.read_u16();  // get the value of poti 2
//        k = k >> 10;          // need only 6 bits for contrast
//        lcd_mutex.lock();
//        LCD.set_contrast(k);
//        lcd_mutex.unlock();
//        Thread::wait(500);    // wait 0.5s
//    }
//}
//// Thread 5
//// RGB LED
//void thread5(void const *args)
//{
//    while(true) {         // thread loop
//        RGBLED_r = 0.5 + (rand() % 11)/20.0;
//        RGBLED_g = 0.5 + (rand() % 11)/20.0;
//        RGBLED_b = 0.5 + (rand() % 11)/20.0;
//        Thread::wait(1667);    // wait 1.5s
//    }
//}
//// Thread 6
//// Speaker
//void thread6(void const *args)
//{
//    while(true) {
//        //sampletick.attach(&audio_sample, 1.0 / sample_freq);
//        /*
//                 // thread loop
//        Speaker.period(1.0/800.0);
//        Speaker = 0.01;
//        Thread::wait(1000);    // wait 1.0s
//        Speaker.period(1.0/969.0);
//        Speaker = 0.01;
//        Thread::wait(1000);    // wait 1.0s
//        */
//    }
//}
//
//// Thread 7
//// Joystick controls onboard mbed LEDs
//void thread7(void const *args)
//{
//    while(true) {         // thread loop
//        if (joyfire) {
//            leds = 0xf;
//        } else {
//            leds = joy;
//        }
//        Thread::wait(200);    // wait 0.25s
//    }
//}



int main()
{
    //int j;
    //LCD.cls();
    Speaker.period(1.0/250000.0);
    //Thread t1(thread1); //start thread1
    //Thread t2(thread2); //start thread2
    //Thread t3(thread3); //start thread3
    //Thread t4(thread4); //start thread4
    //Thread t5(thread5); //start thread5
    //Thread t6(thread6); //start thread6
    //Thread t7(thread7); //start thread7

    while(true) {       // main is the next thread
        //lcd_mutex.lock();
        
        

        
        sampletick.attach(&audio_sample, 1.0 / sample_freq);
        
        //LCD.locate(0,9);
        //LCD.set_font((unsigned char*) Small_7);
        //j = LCD.get_contrast();    // read the actual contrast
        //LCD.printf("contrast : %d",j);
        //lcd_mutex.unlock();
//        wait(1.0 / sample_freq);   // wait 0.5s
    }
}