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Added support or interrupts #25

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Added support or interrupts #25

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10 changes: 10 additions & 0 deletions LiquidCrystal_I2C.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -93,8 +93,10 @@ void LiquidCrystal_I2C::begin() {

/********** high level commands, for the user! */
void LiquidCrystal_I2C::clear(){
cli();
command(LCD_CLEARDISPLAY);// clear display, set cursor position to zero
delayMicroseconds(2000); // this command takes a long time!
sei();
}

void LiquidCrystal_I2C::home(){
Expand All @@ -103,11 +105,13 @@ void LiquidCrystal_I2C::home(){
}

void LiquidCrystal_I2C::setCursor(uint8_t col, uint8_t row){
cli();
int row_offsets[] = { 0x00, 0x40, 0x14, 0x54 };
if (row > _rows) {
row = _rows-1; // we count rows starting w/0
}
command(LCD_SETDDRAMADDR | (col + row_offsets[row]));
sei();
}

// Turn the display on/off (quickly)
Expand All @@ -116,8 +120,10 @@ void LiquidCrystal_I2C::noDisplay() {
command(LCD_DISPLAYCONTROL | _displaycontrol);
}
void LiquidCrystal_I2C::display() {
cli();
_displaycontrol |= LCD_DISPLAYON;
command(LCD_DISPLAYCONTROL | _displaycontrol);
sei();
}

// Turns the underline cursor on/off
Expand All @@ -126,8 +132,10 @@ void LiquidCrystal_I2C::noCursor() {
command(LCD_DISPLAYCONTROL | _displaycontrol);
}
void LiquidCrystal_I2C::cursor() {
cli();
_displaycontrol |= LCD_CURSORON;
command(LCD_DISPLAYCONTROL | _displaycontrol);
sei();
}

// Turn on and off the blinking cursor
Expand Down Expand Up @@ -175,11 +183,13 @@ void LiquidCrystal_I2C::noAutoscroll(void) {
// Allows us to fill the first 8 CGRAM locations
// with custom characters
void LiquidCrystal_I2C::createChar(uint8_t location, uint8_t charmap[]) {
cli();
location &= 0x7; // we only have 8 locations 0-7
command(LCD_SETCGRAMADDR | (location << 3));
for (int i=0; i<8; i++) {
write(charmap[i]);
}
sei();
}

// Turn the (optional) backlight off/on
Expand Down