1.7 KiB
1.7 KiB
HD44780 LCD display driver
Connection type
Driver supports GPIO connections to module and I2C GPIO expanders as well.
Define HD44780_I2C = 0 in application makefile for direct GPIO connection.
See examples/i2c_lcd_test and examples/hd44780_test .
Display types
8x1
Memory layout
Example
hd44780_t lcd = {
.addr = ADDR,
.font = HD44780_FONT_5X8,
.lines = 1,
.pins = {
.rs = 0,
.e = 2,
.d4 = 4,
.d5 = 5,
.d6 = 6,
.d7 = 7,
.bl = 3
},
.backlight = true
};
16x1
Memory layout
Example
hd44780_t lcd = {
.addr = ADDR,
.font = HD44780_FONT_5X8,
.lines = 2,
.pins = {
.rs = 0,
.e = 2,
.d4 = 4,
.d5 = 5,
.d6 = 6,
.d7 = 7,
.bl = 3
},
.backlight = true
};
hd44780_init(&lcd);
hd44780_gotoxy(&lcd, 0, 0);
hd44780_puts(&lcd, "Hello wo");
hd44780_gotoxy(&lcd, 0, 1);
hd44780_puts(&lcd, "rld!");
16x2, 20x2
Memory layout
Example
hd44780_t lcd = {
.addr = ADDR,
.font = HD44780_FONT_5X8,
.lines = 2,
.pins = {
.rs = 0,
.e = 2,
.d4 = 4,
.d5 = 5,
.d6 = 6,
.d7 = 7,
.bl = 3
},
.backlight = true
};
16x4, 20x4
Memory layout
Example
hd44780_t lcd = {
.addr = ADDR,
.font = HD44780_FONT_5X8,
.lines = 4,
.pins = {
.rs = 0,
.e = 2,
.d4 = 4,
.d5 = 5,
.d6 = 6,
.d7 = 7,
.bl = 3
},
.backlight = true
};