dsPIC Tutorial 3-Đọc ngõ vào và giao tiếp LCD

[ltpbkis]

Em code lại chương trình của bác Tungtuantu, thay RW-RB6; RS-RB7; EN-RC15; RD0-DB4; RD1-DB5; RD2-DB6; RD3-DB7
Em sử dụng thạch anh 7.3728, lCD của em la C1602a, chân của DSpic em nối trực tiếp với chân của LCD.
Em thay đổi chương trình lại như sau. Nhưng khi nạp vào thì mạch ko chạy.
Các bác xem dùm em với. Em mới bước chân vào nghề....
Em có làm gì sai ko các bác??????????

#include "p30f4011.h"

	_FOSC(CSW_FSCM_OFF & FRC_PLL16);		
	_FWDT(WDT_OFF);
	_FBORPOR(MCLR_EN & PBOR_OFF & PWMxL_ACT_HI & PWMxH_ACT_HI);
	_FGS(CODE_PROT_OFF);

//------------------------------------------------------------------------------
//Cac hang so cua chuong trinh (gia tri tuc thoi dung trong chuong trinh)

#define	ms_count	125			//So dem tuong ung voi 1 ms, cho timer 1


#define	LCD_EN	_LATC15 		
#define	LCD_RW	_LATB6			
#define	LCD_RS	_LATB7			
		
#define LCD_D4   _LATD0		//Cac tin hieu Data cho LCD, chan (D4..D7)
#define LCD_D5   _LATD1
#define LCD_D6   _LATD2
#define LCD_D7   _LATD3
	
#define	TRIS_LCD_D4	_TRISD0	//Tristate cua cac tin hieu Data cho LCD
#define	TRIS_LCD_D5	_TRISD1
#define	TRIS_LCD_D6	_TRISD2
#define	TRIS_LCD_D7	_TRISD3

#define	LCD_clear	0x01		//Xoa man hinh LCD
#define	LCD_home	0x02		//Tro ve dau dong
#define	LCD_normal	0x06		//Che do nhap du lieu binh thuong
#define	LCD_normal_s	0x07	//Che do nhap du lieu binh thuong, dich man hinh
#define	LCD_off 	0x08		//Tat man hinh
#define	LCD_on	 	0x0C		//Bat man hinh
#define	LCD_on_crsr 0x0E		//Bat man hinh va con tro
#define	LCD_on_blink 0x0F		//Bat man hinh va con tro (nhap nhay)
#define	LCD_4b2l	0x28		//Che do 2 dong, giao tiep 4 bit du lieu
#define	LCD_homeL1	0x80		//Ve dau dong 1
#define	LCD_homeL2	0xC0		//Ve dau dong 2
#define lcd_line_two 0x40

//Cac prototype cho cac chuong trinh con
void Init_PORTS(void);				//Khoi tao cac cong I/O
void Delay_ms(unsigned int);		//Tao tre n ms
void Init_LCD(void);				//Khoi tao LCD
void LCD_cmd4(unsigned char);		//Xuat lenh ra LCD qua giao tiep 4-bit
void LCD_dat4(unsigned char);		//Xuat du lieu ra LCD qua giao tiep 4-bit
void lcd_putstr(char *buffer);		//Xuat 1 ky tu hay 1 chuoi ky tu
void lcd_gotoxy(int x, int y );		//Nhay den cot x, hang y


//------------------------------------------------------------------------------
//Chuong trinh chinh
void main() 
{
	_TRISE3 = 0;
					
	Init_PORTS();				//Khoi tao cac cong I/O
	Init_LCD();					//Khoi tao LCD	
    lcd_putstr("NGUYEN THE TUNG");
	lcd_gotoxy(4,2);
	lcd_putstr("DTD45-DH1");
	while (1) 
	{	
		_LATE3=1;
		Delay_ms(250);		//Vong lap chinh
		_LATE3=0;
		Delay_ms(250);
	}
}


//Chuong trinh con khoi tao cac cong I/O, de noi voi LED
//------------------------------------------------------------------------------
void Init_PORTS(void) 
{
	LCD_D4 = 0;				//Xoa cac bit chot du lieu LCD
	LCD_D5 = 0;
	LCD_D6 = 0;
	LCD_D7 = 0;
	
	TRIS_LCD_D4 = 0;		//Cac chan du lieu LCD la ngo ra
	TRIS_LCD_D5 = 0;
	TRIS_LCD_D6 = 0;
	TRIS_LCD_D7 = 0;
	
	LCD_EN = 0;
	_TRISC15 = 0;			//RE8 la ngo ra, noi vao Enable cua LCD
	LCD_RW = 0;
	_TRISB6 = 0;			//RD0 la ngo ra, noi vao R/W cua LCD
	LCD_RS = 0;
	_TRISB7 = 0;			//RD1 la ngo ra, noi vao Reset cua LCD
}

//Chuong trinh con delay bang timer 1, tre n ms
//TMR1 duoc dung de dem so ms troi qua, o muc xung 8 Mips (fcy = 8 MHz)
//------------------------------------------------------------------------------
void Delay_ms(unsigned int n)
{
	TMR1 = 0;					//Xoa so dem trong TMR1
	T1CON = 0x0020;				//Dung fcy lam clock, prescale = 1:64, tat Timer 1
	PR1 = n*ms_count;			//Dat nguong tran vao PR1							
	T1CONbits.TON = 1;			//Bat timer 1
	while (!_T1IF );			//Cho den khi het thoi gian cho
	_T1IF = 0;					//Xoa co ngat cua Timer 1
	T1CONbits.TON = 0;			//Tat timer 1
	
}

//Chuong trinh con khoi tao module LCD
//------------------------------------------------------------------------------
void Init_LCD(void) {
	LCD_cmd4(LCD_4b2l);			//Dat che do giao tiep 4-bit, man hinh 2 dong
	Delay_ms(1);
	LCD_cmd4(LCD_off);			//Tat man hinh
	Delay_ms(1);
	LCD_cmd4(LCD_normal);		//Che do nhap du lieu binh thuong
	Delay_ms(1);
	LCD_cmd4(LCD_on);			//Bat man hinh, hien con tro nhap nhay
	Delay_ms(1);
	LCD_cmd4(LCD_clear);		//Xoa man hinh
	Delay_ms(5);

}

//Chuong trinh con xuat lenh o che do 4 bit
//------------------------------------------------------------------------------
void LCD_cmd4(unsigned char cmd) {
	unsigned temp1, i;
	LCD_RW = 0;
	LCD_RS = 0;					//Dat che do xuat lenh
	temp1 = cmd >> 4;			//Lay 4 bit cao
	LCD_D4 = temp1 & 1;			//Xuat 4 bit cao
	LCD_D5 = (temp1 & 2) >>1;
	LCD_D6 = (temp1 & 4) >>2;
	LCD_D7 = (temp1 & 8) >>3;
	LCD_EN = 1;					//Tao xung Enable
	for (i = 0; i < 2; i++);	//keo dai toi thieu 1 us
	LCD_EN = 0;
	temp1 = cmd & 0x0F;			//Lay 4 bit thap
	LCD_D4 = temp1 & 1;			//Xuat 4 bit thap
	LCD_D5 = (temp1 & 2) >>1;
	LCD_D6 = (temp1 & 4) >>2;
	LCD_D7 = (temp1 & 8) >>3;
	LCD_EN = 1;		//Tao xung Enable
	for (i = 0; i < 2; i++);	//keo dai toi thieu 1 us
	LCD_EN = 0;
}

//Chuong trinh con xuat du lieu o che do 4 bit
//------------------------------------------------------------------------------
void LCD_dat4(unsigned char dat) {
	unsigned temp2, i;
	LCD_RW = 0;
	LCD_RS = 1;					//Dat che do xuat du lieu
	temp2 = dat >> 4;			//Lay 4 bit cao
	LCD_D4 =  temp2 & 1;		//Xuat 4 bit cao
	LCD_D5 = (temp2 & 2) >>1;
	LCD_D6 = (temp2 & 4) >>2;
	LCD_D7 = (temp2 & 8) >>3;
	LCD_EN = 1;					//Tao xung Enable
	for (i = 0; i < 2; i++);	//keo dai toi thieu 1 us
	LCD_EN = 0;
	temp2 = dat & 0x0F;			//Lay 4 bit thap
	LCD_D4 =  temp2 & 1;		//Xuat 4 bit thap
	LCD_D5 = (temp2 & 2) >>1;
	LCD_D6 = (temp2 & 4) >>2;
	LCD_D7 = (temp2 & 8) >>3;
	LCD_EN = 1;					//Tao xung Enable
	for (i = 0; i < 2; i++);	//keo dai toi thieu 1 us
	LCD_EN = 0;
}
//Chuong trinh con xuat 1 ky tu hay 1 chuoi ky tu
//------------------------------------------------------------------------------
void lcd_putstr(char *buffer)
{

    while(*buffer != '\0')
    {
        LCD_dat4(*buffer); 	/* calling another function */
                                /* to write each char to the lcd module */
        buffer++;
		Delay_ms(1);
		
    }
}
//Chuong trinh con nhay den cot x, dong y
//------------------------------------------------------------------------------
void lcd_gotoxy(int x, int y)
{
	int address;
	
	if(y != 1) address = lcd_line_two;
	else address=0;
	
	address += x-1;
	LCD_cmd4( 0x80 | address);
	Delay_ms(1);
}