//
//	TOUCH PANEL and LCD TEST (DIGIT)
//
// 2022-Jun-15Apr-7

#include "18F26K83.H"
#device ADC=12
#fuses RSTOSC_HFINTRC_64MHZ,PROTECT,NOMCLR,NOBROWNOUT,NOLVP 
#use delay(internal=32MHz)
#use fast_io(A)
#use fast_io(B)
#use fast_io(C)
#use fast_io(E)

#define	LCD_SC_RS	PIN_C3		// LCD PORT DEFINITION RS
#define	LCD_SC_E	PIN_C2		// LCD PORT DEFINITION E
#define	LCD_SC_D4	PIN_C4		// LCD PORT DEFINITION DB4
#define	LCD_SC_D5	PIN_C5		// LCD PORT DEFINITION DB5
#define	LCD_SC_D6	PIN_C6		// LCD PORT DEFINITION DB6
#define	LCD_SC_D7	PIN_C7		// LCD PORT DEFINITION DB6

#define	TP_UP_EDGE		PIN_A2
#define	TP_DOWN_EDGE	PIN_A0
#define	TP_LEFT_EDGE	PIN_A3
#define	TP_RIGHT_EDGE	PIN_A1
#define	TP_DETECT_X		(0)
#define	TP_DETECT_Y		(1)

#include "lcdlib.c"				// LCD control routines

int16 get_ad()	// input AD single time
{	int1	done; int16	value;
	read_adc(ADC_START_ONLY); done = adc_done();
	while(!done) done=adc_done();
	value=read_adc(ADC_READ_ONLY); return(value); }

int16	get_ad16()	// input AD 16 times and average
{
	int16	v; int i;
	v=0; for(i=0;i<16;i++) v+=get_ad(); v= v >> 4;
	return(v);
}

// TOUCH PANEL: GET POSITION
//
int16 touch_get_x()
{
	int16 pos;
	output_high(TP_RIGHT_EDGE);
	output_low(TP_LEFT_EDGE);
	output_drive(TP_RIGHT_EDGE);
	output_drive(TP_LEFT_EDGE);
	set_adc_channel(TP_DETECT_X);
	delay_us(20);
	pos=get_ad16();
	output_float(TP_RIGHT_EDGE);
	output_float(TP_LEFT_EDGE);
	return(pos);
}

int16 touch_get_y()
{
	int16 pos;
	output_high(TP_DOWN_EDGE);
	output_low(TP_UP_EDGE);
	output_drive(TP_DOWN_EDGE);
	output_drive(TP_UP_EDGE);
	set_adc_channel(TP_DETECT_Y);
	delay_us(20);
	pos=get_ad16();
	output_float(TP_DOWN_EDGE);
	output_float(TP_UP_EDGE);
	return(pos);
}

// io_select()   I/O definision for PIC
//
void io_select()
{
	set_tris_a(0xff);set_tris_b(0xff);set_tris_c(0xff);	// all port input
	output_drive(LCD_SC_RS);	output_drive(LCD_SC_E);		// LCD CONTROL
	output_drive(LCD_SC_D4);	output_drive(LCD_SC_D5);	// LCD DATA
	output_drive(LCD_SC_D6);	output_drive(LCD_SC_D7);	// LCD DATA

	setup_adc(ADC_CLOCK_DIV_64  | ADC_TAD_MUL_16);
	setup_adc_ports(sAN0 | sAN1);

	output_float(TP_UP_EDGE);
	output_float(TP_DOWN_EDGE);
	output_float(TP_RIGHT_EDGE);
	output_float(TP_LEFT_EDGE);
}

void main()
{
	int16	x,y;
	
	setup_oscillator(OSC_HFINTRC_8MHZ); // 内部クロック 8MHz (SLOW START UP)
	delay_ms(10);
	setup_oscillator(OSC_HFINTRC_32MHZ); // 内部クロック 32MHz
	delay_ms(500);						// wait for POWER UP
	io_select();						// IO definition
	lcd_init();							// INITIALIZE LCD
	lcd_home();
	lcd_position(0,0);
	printf(lcd_char,"DIGIT TOUCH PANEL POSITION %4ldX OKIRAKU",0);
	lcd_position(0,1);
	printf(lcd_char,"digit touch panel position %4ldy okiraku",0);
	while(1){
		x = touch_get_x();
		y = touch_get_y();
		lcd_position(27,0);
		printf(lcd_char,"%4ld",x);
		lcd_position(27,1);
		printf(lcd_char,"%4ld",y);
	}

}

// end of file