//********************************************************************** 
/*
　＜簡易オシロ＞ 

　★使用ＬＣＤグラフィック・ディスプレイモジュール
　　：ＳＧ１２８６４Ａ（１２８ｘ６４ドット）
*/
//********************************************************************** 

#define		cntl_E		PORTA.F4
#define		cntl_RW		PORTA.F3
#define		cntl_DI		PORTA.F2
#define		cntl_CS2	PORTA.F7
#define		cntl_CS1	PORTA.F6

void	gLcdData(unsigned char cs, unsigned char data)
{
	cntl_CS1 = (((cs == 1) || (cs == 0)) ? 1 : 0);
	cntl_CS2 = (((cs == 2) || (cs == 0)) ? 1 : 0);
	cntl_RW = 0;
	cntl_DI = 1;
	cntl_E = 1;
	PORTB = data;
	Delay_us(30);
	cntl_E = 0;	
	cntl_CS1 = 0;
	cntl_CS2 = 0;
}

void	gLcdCommand(unsigned char cs, unsigned char command)
{
	cntl_CS1 = (((cs == 1) || (cs == 0)) ? 1 : 0);
	cntl_CS2 = (((cs == 2) || (cs == 0)) ? 1 : 0);
	cntl_RW = 0;
	cntl_DI = 0;
	cntl_E = 1;
	PORTB = command;
	Delay_us(30);
	cntl_E = 0;	
	cntl_CS1 = 0;
	cntl_CS2 = 0;
}

void	gLcdClr()
{
	unsigned	char	page, column;
	//
	for (page = 0xB8; page <= 0xBF; page++) {
		gLcdCommand(0, page);
		for (column = 0x40; column <= 0x7F; column++) {
			gLcdCommand(0, column);
			gLcdData(0, 0x00);
		}
	}
}

void	gLcdDotSet(unsigned char x, unsigned char y)	// x(0...127), y(0...63)
{
	unsigned	char cs, pa, ca, dt;
	if (x < 64)
		cs = 1;
	else
		cs = 2;
	//
	switch (y / 8) {
	case 7:
		pa = 0xB8;
		break;
	case 6:
		pa = 0xB9;
		break;
	case 5:
		pa = 0xBA;
		break;
	case 4:
		pa = 0xBB;
		break;
	case 3:
		pa = 0xBC;
		break;
	case 2:
		pa = 0xBD;
		break;
	case 1:
		pa = 0xBE;
		break;
	case 0:
		pa = 0xBF;
		break;
	}
	gLcdCommand(cs, pa);
	//
	ca = x - ((cs - 1) * 64);
	gLcdCommand(cs, ca);
	//
	switch (y / 8) {
	case 0:
		dt = y;
		break;
	case 1:
		dt = y - 8;
		break;
	case 2:
		dt = y - 16;
		break;
	case 3:
		dt = y - 24;
		break;
	case 4:
		dt = y - 32;
		break;
	case 5:
		dt = y - 40;
		break;
	case 6:
		dt = y - 48;
		break;
	case 7:
		dt = y - 56;
		break;
	}
	dt = 0b10000000 >> dt;
	gLcdData(cs, dt);
}

void	gLcdInit()
{
	unsigned	char	page, column;
	//
	cntl_CS1 = 0;
	cntl_CS2 = 0;
	cntl_E   = 0;
	cntl_RW  = 0;
	cntl_DI  = 0;
	//
	gLcdCommand(0, 0b00111111);
	gLcdCommand(0, 0b11000000);
	gLcdClr();
}

//********************************************************************** 

void	main()
{
	static	unsigned	char	buf1[64], buf2[64];
	unsigned	char	x, y, cnt;
	unsigned	int		ad;
	//
	OSCCON = 0b01110000;		// クロックは8Mhz 
	CMCON  = 0b00000111;		// コンパレータは使用しない。
	ANSEL  = 0b00000001;
	TRISA  = 0b00100001;
	TRISB  = 0b00000000;
	//　ＬＣＤの初期化
	Delay_ms(100);
	gLcdInit();
	//　データバッファのクリア 
	for (cnt = 0; cnt < 64; cnt++) {
		buf1[cnt] = 0;
		buf2[cnt] = 0;
	}
	while (1) {
		//　アナログデータの取り込み（最初の６４データ） 
		for (cnt = 0; cnt < 64; cnt++) {
			ad = Adc_Read(0);
			buf1[cnt] = (ad >> 4) & 0b00111111;
		}
		//　アナログデータの取り込み（次の６４データ） 
		for (cnt = 0; cnt < 64; cnt++) {
			ad = Adc_Read(0);
			buf2[cnt] = (ad >> 4) & 0b00111111;
		}
		//　データのドット表示（最初の６４データ） 
		for (x = 0; x < 64; x++) {
			gLcdDotSet(x, buf1[x]);
		}
		//　データのドット表示（次の６４データ） 
		for (x = 0; x < 64; x++) {
			gLcdDotSet(x + 64, buf2[x]);
		}
		//　画面クリア 
		Delay_ms(100);
		gLcdClr();
	}
}

//**********************************************************************