Graphic LCD

Related to: [HW] lcd

This library contains functions to use Homelab graphical LCD. Although LCD is capable of displaying graphical images no such functions are implemented in the library. LCD is used as a 14 x 6 character alphanumeric display.

• void lcd_gfx_init(void)
  

Intializes LCD.

• void lcd_gfx_backlight(bool set)
  

Switch LCD backlight on or off. Parameters:

• set - true when backlight on, false when off.

• void lcd_gfx_clear(void)
  

Clears a whole display.

• void lcd_gfx_clear_line(unsigned char line)
  

Clears a single text line. Parameters:

• line - Line number. 0 to 5.

• void lcd_gfx_goto_char_xy(unsigned char x, unsigned char y)
  

Selects a position to write text to. Parameters:

• x - X coordinate. 0 to 13.
• y - Y coordinate. 0 to 5.

• void lcd_gfx_write_char(char c)
  

Writes a character to the pre-defined position. Parameters:

• c - ASCII character.

• void lcd_gfx_write_string(char *s)
  

Writes a string to the display starting from the pre-defined position. Parameters:

• s - Pointer to string (char array).

Demonstration of using a graphical LCD.

#include <homelab/module/lcd_gfx.h>
 
int main(void)
{
	// LCD initialization.
	lcd_gfx_init();
 
	// Display clearing.
	lcd_gfx_clear();
 
	// Cursor to the middle of the screen.
	lcd_gfx_goto_char_xy(5, 2);
 
	// Displaying a text.
	lcd_gfx_write_string("Hello");
}