void Max_LCD::begin(uint8_t cols, uint8_t lines, uint8_t dotsize) {
if (lines > 1) {
_displayfunction |= LCD_2LINE;
}
_numlines = lines;
_currline = 0;
// for some 1 line displays you can select a 10 pixel high font
if ((dotsize != 0) && (lines == 1)) {
_displayfunction |= LCD_5x10DOTS;
}
// SEE PAGE 45/46 FOR INITIALIZATION SPECIFICATION!
// according to datasheet, we need at least 40ms after power rises above 2.7V
// before sending commands. Arduino can turn on way befer 4.5V so we'll wait 50
delayMicroseconds(50000);
lcdPins = 0x30;
SET_E;
SENDlcdPins();
CLR_E;
SENDlcdPins();
delayMicroseconds(10000); // wait min 4.1ms
//second try
SET_E;
SENDlcdPins();
CLR_E;
SENDlcdPins();
delayMicroseconds(10000); // wait min 4.1ms
// third go!
SET_E;
SENDlcdPins();
CLR_E;
SENDlcdPins();
delayMicroseconds(10000);
// finally, set to 4-bit interface
lcdPins = 0x20;
//SET_RS;
SET_E;
SENDlcdPins();
//CLR_RS;
CLR_E;
SENDlcdPins();
delayMicroseconds(10000);
// finally, set # lines, font size, etc.
command(LCD_FUNCTIONSET | _displayfunction);
// turn the display on with no cursor or blinking default
_displaycontrol = LCD_DISPLAYON | LCD_CURSOROFF | LCD_BLINKOFF;
display();
// clear it off
clear();
// Initialize to default text direction (for romance languages)
_displaymode = LCD_ENTRYLEFT | LCD_ENTRYSHIFTDECREMENT;
// set the entry mode
command(LCD_ENTRYMODESET | _displaymode);
}
void Max_LCD::sendbyte(uint8_t val) {
lcdPins &= 0x0f; //prepare place for the upper nibble
lcdPins |= (val & 0xf0); //copy upper nibble to LCD variable
SET_E; //send
SENDlcdPins();
delayMicroseconds(2);
CLR_E;
delayMicroseconds(2);
SENDlcdPins();
lcdPins &= 0x0f; //prepare place for the lower nibble
lcdPins |= (val << 4) & 0xf0; //copy lower nibble to LCD variable
SET_E; //send
SENDlcdPins();
CLR_E;
SENDlcdPins();
delayMicroseconds(100);
}
