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| /* --------------------------------------------------------------------------- |
| * AVR_MLIB - HD 44780 LCD Display Driver |
| * www.mlab.cz miho 2008 |
| * --------------------------------------------------------------------------- |
| * LCD display driver for standard Hitachi 1/2/4 line character LCD modules |
| * for AVR processors. It uses 4 or 8 bit interface without readback. |
| * In the Examples section there is a demo application for this library. |
| * --------------------------------------------------------------------------- |
| * 00.00 2008/03/28 First Version |
| * --------------------------------------------------------------------------- |
| */ |
| |
| |
| // What should be set and done before here |
| // --------------------------------------- |
| // |
| // #include <stdio.h> // If you want to use printf, ... |
| // |
| // #define LCD_DATA B // 4 or 8 bits field (lsb bit of the port) |
| // #define LCD_DATA_BIT 4 |
| // |
| // #define LCD_RS D // Register Select (port and bit) |
| // #define LCD_RS_BIT 4 |
| // |
| // #define LCD_E D // Enable (port and bit) |
| // #define LCD_E_BIT 3 |
| // |
| // |
| // // LCD Display Parameters |
| // #define LCD_INTERFACE_BITS 4 // 4 or 8 bit interface |
| // #define LCD_LINES 1 // 1 or 2 or 4 lines |
| // #define LCD_CHARS 20 // usualy 16 or 20, important for 4 line display only |
| // |
| // #include "lcd_hd44780.h" // Use LCD Library |
| // |
| // |
| // How to use the library |
| // ---------------------- |
| // |
| // void lcd_init(void) // Init LCD Display |
| // |
| // void lcd_home() // Goto Home |
| // |
| // void lcd_clear() // Clear Display |
| // |
| // void lcd_clear_home() // Clear Display and Goto Home with no Cursor |
| // |
| // void lcd_cursor_on() // Switch Cursor On |
| // |
| // void lcd_cursor_off() // Switch Cursor Off |
| // |
| // void lcd_cursor_left() // Move Cursor Left |
| // |
| // void lcd_cursor_right() // Move Cursor Right |
| // |
| // void lcd_gotoxy(uint8_t x, uint8_t y) // Move to Position (1,1 is the first position) |
| // |
| // int lcd_putc(char c) // LCD Char Output |
| // |
| // int lcd_putc_stream(char c, FILE *unused) // LCD Char Output (for Stream Library) |
| // |
| // |
| // How to use printf |
| // ----------------- |
| // |
| // 1) Define FILE structure |
| // |
| // static FILE lcd_stream = FDEV_SETUP_STREAM(lcd_putc_stream, NULL, _FDEV_SETUP_WRITE); |
| // |
| // 2) Connect it with standard output |
| // |
| // stdout = &lcd_stream; // Connect stdout to LCD Stream |
| // |
| // 3) Use printf |
| // |
| // printf("\fHello World!\n------------"); |
| // |
| // 4) Use special chars |
| // |
| // \f - clear display and goto home |
| // \n - goto the beginning of the next line |
| // \r - goto to the beginning of curent line |
| // \b - backspace |
| // \v - start and end definition of user defined char |
| // |
| // |
| // How to use User Defined symbols |
| // ------------------------------- |
| // |
| // That is easy. Just print the definition to lcd. Look at the example |
| // |
| // printf("\v" "\x10" LCD_CHAR_BAT50 "\v"); // definition (redefines CGRAM content of the LCD) |
| // printf("Battery Status \x10"); // usage |
| // |
| // \v starts the definition |
| // \x10 first (of eight) user defined char |
| // LCD_CHAR_BAT50 half battery symbol, you can define more symbols here (up to 8) |
| // \v end of definition |
| // |
| |
| #include "global.h" |
| #include <avr/io.h> // Device Specific Defines |
| #include <stdio.h> |
| #include <util/delay.h> // Delay Routines |
| |
| // IO Pins MACROS |
| #define GLUE(a,b) a##b |
| #define PORT(a) GLUE(PORT,a) |
| #define PIN(a) GLUE(PIN,a) |
| #define DDR(a) GLUE(DDR,a) |
| |
| |
| |
| // LCD Port Settings |
| #define LCD_DATA A // 4 or 8 bits field (lsb port) |
| #define LCD_DATA_BIT 4 |
| |
| #define LCD_RS C // Register Select |
| #define LCD_RS_BIT 2 |
| |
| #define LCD_E C // Enable |
| #define LCD_E_BIT 4 |
| |
| // LCD Display Parameters |
| #define LCD_INTERFACE_BITS 4 // 4 or 8 bit interface |
| #define LCD_LINES 2 // 1 or 2 or 4 lines |
| #define LCD_CHARS 18 // usualy 16 or 20, important for 4 line display only |
| |
| // Goto Home |
| void lcd_home(void); |
| |
| // Clear Display |
| void lcd_clear(void); |
| |
| // Switch Cursor On |
| void lcd_cursor_on(void); |
| |
| // Switch Cursor Off |
| void lcd_cursor_off(void); |
| |
| // Clear Display and Goto Home with no Cursor |
| void lcd_clear_home(void); |
| |
| // Move to Position (1,1 is the first position) |
| void lcd_gotoxy(uint8_t x, uint8_t y); |
| |
| // Increment Position |
| void lcd_inc_pos(void); |
| |
| // Decrement Position |
| void lcd_dec_pos(void); |
| |
| // Move Cursor Left |
| void lcd_cursor_left(void); |
| |
| // Move Cursor Right |
| void lcd_cursor_right(void); |
| |
| // Init LCD Display |
| void lcd_init(void); |
| |
| // LCD Char Output |
| int lcd_putc(char c); |
| |