// initiatize lcd after a short pause
//while there are hard-coded details here of lines, cursor and blink settings, you can override these original settings after calling .init()
void LCD4Bit_mod::begin ()
{
pinMode(Enable,OUTPUT);
pinMode(RS,OUTPUT);
if (USING_RW) { pinMode(RW,OUTPUT); }
pinMode(DB[0],OUTPUT);
pinMode(DB[1],OUTPUT);
pinMode(DB[2],OUTPUT);
pinMode(DB[3],OUTPUT);
delay(50);
//The first 4 nibbles and timings are not in my DEM16217 SYH datasheet, but apparently are HD44780 standard...
commandWriteNibble(0x03);
delay(5);
commandWriteNibble(0x03);
delayMicroseconds(100);
commandWriteNibble(0x03);
delay(5);
// needed by the LCDs controller
//this being 2 sets up 4-bit mode.
commandWriteNibble(0x02);
commandWriteNibble(0x02);
//todo: make configurable by the user of this library.
//NFXX where
//N = num lines (0=1 line or 1=2 lines).
//F= format (number of dots (0=5x7 or 1=5x10)).
//X=don't care
byte num_lines_ptn = (num_lines - 1) << 3;
byte dot_format_ptn = 0x00; //5x7 dots. 0x04 is 5x10
commandWriteNibble(num_lines_ptn | dot_format_ptn);
delayMicroseconds(60);
//The rest of the init is not specific to 4-bit mode.
//NOTE: we're writing full bytes now, not nibbles.
// display control:
// turn display on, cursor off, no blinking
commandWrite(0x0C);
delayMicroseconds(60);
//clear display
commandWrite(0x01);
delay(3);
// entry mode set: 06
// increment automatically, display shift, entire shift off
commandWrite(0x06);
delay(1);//TODO: remove unnecessary delays
}
// initialize LCD after a short pause
//while there are hard-coded details here of lines, cursor and blink settings, you can override these original settings after calling .init()
void LCD4Bit_mod::init() {
// Configure pins as outputs
setbits(CONTROL_DDR, CONTROL_EN | CONTROL_RS);
#ifdef USING_RW
setbits(CONTROL_DDR, CONTROL_RW);
#endif
setbits(DATA_DDR, DATA_PINS);
delay(50);
//The first 4 nibbles and timings are not in my DEM16217 SYH datasheet, but apparently are HD44780 standard...
commandWriteNibble(0x03);
delay(5);
commandWriteNibble(0x03);
delayMicroseconds(100);
commandWriteNibble(0x03);
delay(5);
// needed by the LCDs controller
//this being 2 sets up 4-bit mode.
commandWriteNibble(0x02);
commandWriteNibble(0x02);
//todo: make configurable by the user of this library.
//NFXX where
//N = num lines (0=1 line or 1=2 lines).
//F= format (number of dots (0=5x7 or 1=5x10)).
//X=don't care
uint8_t num_lines_ptn = g_num_lines - 1 << 3;
uint8_t dot_format_ptn = 0x00; //5x7 dots. 0x04 is 5x10
commandWriteNibble(num_lines_ptn | dot_format_ptn);
delayMicroseconds(60);
//The rest of the init is not specific to 4-bit mode.
//NOTE: we're writing full bytes now, not nibbles.
// display control:
// turn display on, cursor off, no blinking
//
commandWrite(CMD_DISPLAY | CMD_DISPLAY_DISPLAY_ON/*0x0C*/);
delayMicroseconds(60);
//clear display
commandWrite(CMD_CLEAR);
delay(3);
// entry mode set: 06
// increment automatically, display shift, entire shift off
commandWrite(0x06);
delay(1);//TODO: remove unnecessary delays
}
// initiatize lcd - cursor and blink settings could be overriden after initializing
void init_lcd() {
pinMode(EN_PORT, EN_BIT, OUTPUT);
pinMode(RS_PORT, RS_BIT, OUTPUT);
set_db_pin_mode(OUTPUT);
digitalWrite(EN_PORT, EN_BIT, 0);
_delay_ms(20);
//init (interface still 8-bit)
commandWriteNibble(0x03);
_delay_ms(5);
commandWriteNibble(0x03);
_delay_us(100);
commandWriteNibble(0x03);
_delay_us(100);
// needed by the LCDs controller
//this being 2 sets up 4-bit mode.
commandWriteNibble(0x02);
commandWriteNibble(0x02);
//todo: make configurable by the user of this library.
//NFXX where
//N = num lines (0=1 line or 1=2 lines).
//F= format (number of dots (0=5x7 or 1=5x10)).
//X=don't care
int num_lines_ptn = (g_num_lines - 1) << 3;
int dot_format_ptn = 0x00; //5x7 dots. 0x04 is 5x10
commandWriteNibble(num_lines_ptn | dot_format_ptn);
_delay_us(60);
//The rest of the init is not specific to 4-bit mode.
//NOTE: we're writing full bytes now, not nibbles.
// display control:
// turn display on, cursor off, no blinking
set_display_cursor_blink(0b100);
//clear display
clear();
// entry mode set: 06
// increment automatically, display shift, entire shift off
commandWrite(0x06);
_delay_ms(1);//TODO: remove unnecessary delays
}
// initiatize lcd - cursor and blink settings could be overriden after initializing
void init_lcd() {
//Power-up delay
_delay_ms(100);
pinMode(EN_PORT, EN_BIT, OUTPUT);
pinMode(RS_PORT, RS_BIT, OUTPUT);
#if USING_RW != 0
if (USING_RW) { pinMode(RW_PORT, RW_BIT, OUTPUT); }
#endif
pinMode(DB0_PORT, DB0_BIT,OUTPUT);
pinMode(DB1_PORT, DB1_BIT,OUTPUT);
pinMode(DB2_PORT, DB2_BIT,OUTPUT);
pinMode(DB3_PORT, DB3_BIT,OUTPUT);
digitalWrite(EN_PORT, EN_BIT, 1);
commandWriteNibble(lcd_FunctionReset); // first part of reset sequence
_delay_ms(10);
commandWriteNibble(lcd_FunctionReset); // second part of reset sequence
_delay_us(200);
commandWriteNibble(lcd_FunctionReset); // third part of reset sequence
_delay_us(200); // this delay is omitted in the data sheet
commandWriteNibble(lcd_Home);
_delay_ms(1);
commandWriteNibble(lcd_Home);
_delay_ms(1);
commandWriteNibble(lcd_DisplayOn);
_delay_us(80);
commandWriteNibble(lcd_DisplayOff);
_delay_us(80);
commandWriteNibble(0x00);
_delay_ms(1);
commandWriteNibble(lcd_Clear);
_delay_ms(4);
commandWriteNibble(0x00);
_delay_ms(1);
commandWriteNibble(lcd_EntryMode);
_delay_us(80);
// needed by the LCDs controller
//this being 2 sets up 4-bit mode.
commandWriteNibble(lcd_Home);
commandWriteNibble(lcd_Home);
//todo: make configurable by the user of this library.
//NFXX where
//N = num lines (0=1 line or 1=2 lines).
//F= format (number of dots (0=5x7 or 1=5x10)).
//X=don't care
int num_lines_ptn = (g_num_lines - 1) << 3;
int dot_format_ptn = 0x00; //5x7 dots. 0x04 is 5x10
commandWrite(num_lines_ptn | dot_format_ptn | 0x20);
_delay_us(60);
//The rest of the init is not specific to 4-bit mode.
//NOTE: we're writing full bytes now, not nibbles.
// display control:
// turn display on, cursor off, no blinking
commandWrite(lcd_DisplayOn);
_delay_us(60);
//clear display
commandWrite(lcd_Clear);
_delay_ms(3);
// entry mode set: 06
// increment automatically, display shift, entire shift off
commandWrite(lcd_EntryMode);
_delay_ms(1);//TODO: remove unnecessary delays
}
