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