void initLCD(void) {
LCD_BACKLIGHT_TRIS = OUTPUT;
__delay_ms(5);
// IO Tris
LCD_D0_TRIS = OUTPUT;
LCD_D1_TRIS = OUTPUT;
LCD_D2_TRIS = OUTPUT;
LCD_D3_TRIS = OUTPUT;
LCD_D4_TRIS = OUTPUT;
LCD_D5_TRIS = OUTPUT;
LCD_D6_TRIS = OUTPUT;
LCD_D7_TRIS = OUTPUT;
LCD_RW_TRIS = OUTPUT;
LCD_RS_TRIS = OUTPUT;
LCD_EN_TRIS = OUTPUT;
// init
LCD_RS = 0; //RS=0: Command, RS=1: Data
LCD_RW = 0; //R/W=0: Write, R/W=1: Read
LCD_EN = 0; //clock enable
__delay_ms(15);
commandLCD(0b00110000); // 8 bit interface, 8 chars per line, 5x10 pixels per char
commandLCD(0b00110000);
commandLCD(0b00110000);
commandLCD(0b00111000);
commandLCD(0b00000110); // no display shift
commandLCD(0b00011000);
commandLCD(0b00001100); // display on, cursor off, no blink
lcd_info.line = lcd_info.pos = 0;
}
void initLCD(void) {
LCD_BACKLIGHT_DIR = OUTPUT; // Set LCD backlight-pin as output
ADCON1 = 0x0A; // RE0-2 digital
delay_ms(5); // wait 5ms
LCD_DATA = 0;
LCD_DATA_DIR = 0xff;
LCD_RS_DIR = OUTPUT;
LCD_RW_DIR = OUTPUT;
LCD_EN_DIR = OUTPUT;
LCD_RS = 0;
LCD_RW = 0;
LCD_EN = 0;
delay_ms(15);
LCD_DATA_DIR = 0;
commandLCD(0b00110000);
commandLCD(0b00110000);
commandLCD(0b00110000);
commandLCD(0b00111000);
commandLCD(0b00000110);
commandLCD(0b00011000);
commandLCD(0b00001100);
lcd_info.line = lcd_info.pos = 0;
clearLCD();
}
// set cursor at position p of line l
void setCursorLCD(BYTE l, BYTE p) {
BYTE c;
// check if input is valid
if (l>LCD_LASTLINE) l = LCD_LASTLINE;
if (p>LCD_LASTPOS) p = LCD_LASTPOS;
lcd_info.line = l;
lcd_info.pos = p;
if (l == 1)
c = 0b11000000;
else
c = 0b10000000;
// position offset
p &= 0b00001111;
c |= p;
commandLCD(c);
delay_us(45); // wait until display has processed the command
}
void clearLCD(void) {
commandLCD(0b00000001);
delay_ms(2);
setCursorLCD(0,0);
}
