File content as of revision 0:dfc39b05ea05:

#include "mbed.h"
#include "C12832_lcd.h"
#include "DebounceIn.h"
#include "rtos.h"

Serial pc(USBTX, USBRX);
C12832_LCD LCD;
AnalogIn Ain(p17);
AnalogOut Aout(p18);
AnalogIn pot1(p19);
AnalogIn pot2(p20);
DigitalIn up(p15);
DigitalIn down(p12);
DigitalIn left(p13);
DigitalIn right(p16);
BusIn joy(p15,p12,p13,p16);
DigitalIn OnOff(p14);
PwmOut testout(p21);
PwmOut tled(LED1);
/*
DebounceIn OnOff(p14);
DebounceIn up(p15);
DebounceIn down(p12);
DebounceIn left(p13);
DebounceIn right(p16);
*/

bool  en_saw=false, en_dc=false, en_square=false, en_sine=false, en_display=false;

// SineWave thread - is initiated when the user selects sinewave output
// print a sin function in a small window
// the value of pot 1 changes the period of the sine wave
// The value of pot 2 changes the height of the sine wave
void sineWave(const void *arg)
{
    double i, vert, horiz, outval;
    while(true) {       // thread loop
    	while( en_sine ) {
        	horiz = pot1.read();  // get value of pot 1
        	vert = pot2.read();	// scale the height of wave
        //	pc.printf("horiz=%f, vert=%f\r\n", horiz, vert);
        	for (i=0; i<2; i=i+0.05) {
        		outval = 0.5 + 0.5*vert*sin(i*3.14159);
           		Aout.write(outval);  // Compute the sine value, + half the range
           		//pc.printf("Output is: %f\r\n", outval);
           		Thread::wait(0.00005);          	         // Controls the sine wave period
        	}
        }
        Thread::wait(200);
    }
}

// Thread squareWave - called if user selects squarewave
// pot1 controls the width of pulse
// pot2 controls the height of pulse
void squareWave(const void *arg)
{
	unsigned int i;
	float width, height, w;
    while(true) {       // thread loop
    	while( en_square ) {
        	width = pot1.read_u16();  // get value of
        	w = width*2;
        	height = pot2.read();	// scale the height of wave
        	for (i=0; i<w; i++) {
            	if( i >= width ) 
            		Aout.write(0);
            	else
            		Aout.write(height);
        	}
        	Thread::wait(5);
        }
        Thread::wait(200);
    }
}

// Thread flatdc - called if user selects dc sig
// pot2 controls the height of dc signal
void flatdc(const void *arg)
{
    while(true) {       // thread loop
    	while( en_dc ) {
         	Aout.write(pot2.read());	// scale the height of wave
        	Thread::wait(10);
        }
        Thread::wait(200);
    }
}
	
void displayWave(const void *arg)
{
	unsigned int i;
    unsigned int h = LCD.height(), w = LCD.width(), hhh;
    unsigned int time_base = 0.5;
    float trigger, curstate;
    while(true) {       // thread loop
    	while( en_display ) {
        	for (i=0; i<w; i++) {
            	hhh = (int)((h-(h*Ain.read()))+4);
            	LCD.pixel(i, hhh ,1);           // print pixel
            	Thread::wait(time_base);
        	}
        	LCD.copy_to_lcd();  // LCD.pixel does not update the lcd
        	Thread::wait(20);  
        	LCD.cls();
        	LCD.rect(0,0,w,h,1);
        	trigger = pot1.read();
        	while( Ain.read() < trigger ) Thread::wait(0.5);
        	if( false ) { //en_square ) {
        		while( Ain.read() > 0.2 ) Thread::wait(0.5);
        		while( Ain.read() < trigger ) Thread::wait(0.5);
        	}
        }
        LCD.cls();
    }
}
	
	
int main()
{
    bool do_sinewave, do_squarewave, do_sawtooth, do_dc;
    pc.baud(19200);
    //testout.period_ms(6);
    //testout.write(0.5);
    testout.period_ms(127);
    testout.pulsewidth_ms(127*pot2.read());
    en_display = true;
    Thread display(displayWave);
 //	Thread square(squareWave);
 	//Thread saw(sawtooth);
 //	Thread dc(flatdc); 
 //	Thread sine(sineWave);
 	while(1) {
 		//tled = testout;
 		testout.pulsewidth_ms(127*pot2.read());
 		Thread::wait(500);
 	}
    while(1)  {
    	while( !OnOff ) { 
    		//pc.printf("havent selected yet\r\n"); 
    		if( up ) {
    			do_sinewave = false;
    			do_squarewave = false;
    			do_sawtooth = true;
    			do_dc = false;
    		}
    		if( down ) {
    			do_sinewave = false;
    			do_squarewave = false;
    			do_sawtooth = false;
    			do_dc = true;
    		}
    		if( left ) {
    			do_sinewave = true;
    			do_squarewave = false;
    			do_sawtooth = false;
    			do_dc = false;
    		}
    		if( right ) {
    			do_sinewave = false;
    			do_squarewave = true;
    			do_sawtooth = false;
    			do_dc = false;
    		}
    		Thread::wait(20);
    	}
     	if( do_squarewave ) {
     		pc.printf("I selected square\r\n"); 
    		en_square = true;
 		}
 		else if( do_sawtooth ) {
 			pc.printf("I selected saw\r\n"); 
 			en_saw = true;
 		}
 		else if( do_dc ) {
 			pc.printf("I selected DC\r\n"); 
 			en_dc = true;
 		}
 		else {
 			pc.printf("I selected sine\r\n"); 
 			en_sine = true;
 		}
 		en_display = true;
 		while( OnOff ) {
 		//	pc.printf("In first\r\n");
 			Thread::wait(200);
 		}
 		while( !OnOff ) {
 		//	pc.printf("In Second\r\n");
 			Thread::wait(200);
 		}
 		while( OnOff ) {
 		//	pc.printf("In Third\r\n");
 			Thread::wait(100);
 		}
 		if( do_squarewave ) {
     		pc.printf("I terminated square\r\n"); 
    		en_square = false;
 		}
 		else if( do_sawtooth ) {
 			pc.printf("I terminated saw\r\n"); 
 			en_saw = false;
 		}
 		else if( do_dc ) {
 			pc.printf("I terminated DC\r\n"); 
 			en_dc = false; 
 		}
 		else {
 			pc.printf("I terminated sine\r\n"); 
 			en_sine = false;		
 		}
 		en_display=false;
 		LCD.cls();
    }
}