//dung tre 100us thay kiem tra co ban
void lcd_init(){
lcd_setupout(0);
//Function set------------------------------------------------------------------------------
BIT_DDR_EN_LCD=huongra;
BIT_OUT_EN_LCD=1; //
BIT_DDR_RW_LCD=huongra;
BIT_OUT_RW_LCD=0; //ghi
BIT_DDR_RS_LCD=huongra;
BIT_OUT_RS_LCD=0; //chon thanh ghi lenh
delay_ms(500);
//Cai dat mode 4 bit bang cach gui 0x20 theo mode 8 bit
// moi khoi dong mac dinh la 8 bit nen
lcd_write_nibble(0x3);//LA 0X3 LA CHE DO 8 BIT
delay_ms(1); //bat buoc
lcd_write_nibble(0x3); //lenh gui van theo mode 8 bit
//toi day chac chan la 8 bit
//toi day chac chan la 8 bit
delay_ms(1);// bat buoc
//toi day da chac chan dang la mode 8 bit
lcd_write_nibble(0x2);//lenh gui 8 bit nhung chi quan tam may bit dau nen
// delay_ms(5);// bat buoc
//Function set------------------------------------------------------------------------------
lcd_writecmd(0x28);//4 bit mode, 2 line, 5x8 font // toi day da ok 2c fong 5x10
//Display control-------------------------------------------------------------------------
lcd_writecmd(0x0C);//hien thi man hinh, con tro ko nhap nhay 0eco tro nhay
//Entry mode set------------------------------------------------------------------------
lcd_writecmd(0x06);//ko dich man hinh, con tro tang moi lan doc hoac ghi (VIET TU TRAI QUA FAI)
lcd_writecmd(0x01);
}
/* Schreibt ein Char auf das Display */
int lcd_wchar(int data)
{
int ret,temp;
ret=0;
if(!lcd_busy()) {
temp = data >> 4;
ret = lcd_write_nibble(LCD_DR,temp);
temp = data & 0xf;
ret = lcd_write_nibble(LCD_DR,temp);
}
// viet du lieu (lenh) toi lcd neu lenh xao man thi tre 2ms (lenh nay thuc hien `1.64ms)
void lcd_writecmd(unsigned char chr){
lcd_wait(); //RS=0; RW=0
BIT_DDR_RS_LCD=huongra;
BIT_OUT_RS_LCD=0; //GHI LENH
lcd_write_nibble(chr>>4);
lcd_write_nibble(chr);
// if((chr==1)||(chr==3))delay_ms(3);
}
// viet du lieu (ky tu) toi lcd, ham nay da su ly xuong dong tu dong
void lcd_write_byte(char chr){
unsigned char x,FlagGanCuoiDong=0,ToaDoChuyenDong;
x=lcd_wait(); //WDR
#if(lines==4)
switch (x){
case cuoidong0: ToaDoChuyenDong=daudong1,FlagGanCuoiDong=1;
break;
case cuoidong1: ToaDoChuyenDong=daudong2,FlagGanCuoiDong=1;
break;
case cuoidong2: ToaDoChuyenDong=daudong3,FlagGanCuoiDong=1;
break;
case cuoidong3: ToaDoChuyenDong=daudong0,FlagGanCuoiDong=1;
break;
default:break;
}
#elif (lines==2)
switch (x){
case cuoidong0: ToaDoChuyenDong=daudong1;FlagGanCuoiDong=1;
break;
case cuoidong1: ToaDoChuyenDong=daudong0;FlagGanCuoiDong=1;
break;
default:break;
}
#elif (lines==1)
switch (x){
case cuoidong0: ToaDoChuyenDong=daudong0;FlagGanCuoiDong=1;
break;
default: break;
}
#endif
if(chr=='\n'){
#if lines==2
if(x>=daudong1)x=daudong0;
else if(x>=daudong0)x=daudong1;
#elif lines==4
if ((x>=daudong3))x=daudong0;
else if((x>=daudong1))x=daudong2;
else if((x>=daudong2))x=daudong3;
else if((x>=daudong0))x=daudong1;
#elif lines==1
x=daudong0;
#endif
lcd_writecmd(0x80|x);
return;
}else{
BIT_DDR_RS_LCD=huongra;
BIT_OUT_RS_LCD=1; //GHI DU LIEU
lcd_write_nibble(chr>>4);
lcd_write_nibble(chr);
if((FlagGanCuoiDong)){lcd_writecmd(0x80+ToaDoChuyenDong);}
}
}
void lcd_init(void)
{
LCD_CTRL_PORT &= ~LCD_CTRL_MASK;
LCD_CTRL_DDR |= LCD_CTRL_MASK;
_delay_ms(20);
lcd_prepare_write(0);
lcd_write_nibble(0x3);
_delay_us(40);
lcd_write_nibble(0x3);
_delay_us(40);
lcd_write_nibble(0x3);
_delay_us(40);
lcd_write_nibble(0x2);
_delay_us(40);
lcd_write(0, 0x28);
_delay_us(40);
lcd_on(0);
lcd_clear();
lcd_set_entry_mode(LCD_MODE_ID);
lcd_on(LCD_ON_DISPLAY | LCD_ON_BLINK);
lcd_init_hints();
}
/* Initialisierung des Display's 4-BIT , 2 Zeilen */
int lcd_init(void)
{
int ret;
ret = iic_tx_pcf8574(8,PCF_ADRESS); // BL EIN RS/RW 0
usleep(15000);
ret=lcd_write_nibble(LCD_IR,0x03);
usleep(5000);
ret=lcd_write_nibble(LCD_IR,0x03);
usleep(200);
ret=lcd_write_nibble(LCD_IR,0x03);
usleep(50);
ret=lcd_write_nibble(LCD_IR,0x02);
ret=lcd_instr(0x28); // 4 BIT-Mode , 2 Zeilen
ret=lcd_instr(LCD_OFF); // LCD_Off
ret=lcd_instr(LCD_CLR); // LCD_Clear
ret=lcd_instr(0x02); // Cursor an 1. Stelle
ret=lcd_instr(0x06); // Cursor Richtung +1
ret=lcd_instr(0x0E); // Display an , Cursor klein , kein Blinken
lcd_ADRESS=0; // Aktuelle Adresse = 0
lcd_BACKLIGHT=1; // Licht ein
lcadr=0;
return ret;
}
static void lcd_write(uint8_t addr, uint8_t v)
{
lcd_prepare_write(addr);
lcd_write_nibble(v >> 4);
lcd_write_nibble(v);
}
