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??????????
Code:
#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);
}