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147 lines
3.4 KiB
147 lines
3.4 KiB
9 years ago
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#pragma once
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// HD44780 LCD display driver - 4-bit mode
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//
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// LCD pins are configured using a file lcd_config.h, which you
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// have to add next to your main.c file.
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//
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// Content can be something like this:
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//
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//
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#include <stdint.h>
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#include <stdbool.h>
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#include "stream.h"
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// Your file with configs
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#include "lcd_config.h"
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/*
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#define LCD_RS 10
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#define LCD_RW 11
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#define LCD_E 12
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#define LCD_D4 13
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#define LCD_D5 14
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#define LCD_D6 15
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#define LCD_D7 16
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*/
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// Shared LCD stream object
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// Can be used with functions from stream.h once LCD is initialized
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extern STREAM* lcd;
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// --- Commands ---
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// Clear screen (reset)
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#define LCD_CLEAR 0b00000001
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// Move cursor to (0,0), unshift...
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#define LCD_HOME 0b00000010
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// Set mode: Increment + NoShift
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#define LCD_MODE_INC 0b00000110
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// Set mode: Increment + Shift
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#define LCD_MODE_INC_SHIFT 0b00000111
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// Set mode: Decrement + NoShift
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#define LCD_MODE_DEC 0b00000100
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// Set mode: Decrement + Shift
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#define LCD_MODE_DEC_SHIFT 0b00000101
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// Disable display (data remains untouched)
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#define LCD_DISABLE 0b00001000
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// Disable cursor
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#define LCD_CURSOR_NONE 0b00001100
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// Set cursor to still underscore
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#define LCD_CURSOR_BAR 0b00001110
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// Set cursor to blinking block
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#define LCD_CURSOR_BLINK 0b00001101
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// Set cursor to both of the above at once
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#define LCD_CURSOR_BOTH (LCD_CURSOR_BAR | LCD_CURSOR_BLINK)
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// Move cursor
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#define LCD_MOVE_LEFT 0b00010000
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#define LCD_MOVE_RIGHT 0b00010100
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// Shift display
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#define LCD_SHIFT_LEFT 0b00011000
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#define LCD_SHIFT_RIGHT 0b00011100
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// Set iface to 5x7 font, 1-line
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#define LCD_IFACE_4BIT_1LINE 0b00100000
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#define LCD_IFACE_8BIT_1LINE 0b00110000
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// Set iface to 5x7 font, 2-line
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#define LCD_IFACE_4BIT_2LINE 0b00101000
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#define LCD_IFACE_8BIT_2LINE 0b00111000
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/** Initialize the display */
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void lcd_init();
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/** Write an instruction byte */
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void lcd_command(uint8_t bb);
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/** Write a data byte */
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void lcd_write(uint8_t bb);
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/** Read BF & Address */
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uint8_t lcd_read_bf_addr();
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/** Read CGRAM or DDRAM */
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uint8_t lcd_read();
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/** Send a string to LCD */
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void lcd_puts(char* str_p);
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/** Send a string to LCD from program memory */
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void lcd_puts_P(const char* str_p);
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/** Sedn a char to LCD */
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void lcd_putc(const char c);
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/** Show string at X, Y */
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#define lcd_puts_xy(x, y, str_p) do { lcd_xy((x), (y)); lcd_puts((str_p)); } while(0)
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/** Show string at X, Y */
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#define lcd_puts_xy_P(x, y, str_p) do { lcd_xy((x), (y)); lcd_puts_P((str_p)); } while(0)
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/** Show char at X, Y */
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#define lcd_putc_xy(x, y, c) do { lcd_xy((x), (y)); lcd_putc((c)); } while(0)
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/** Set cursor position */
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void lcd_xy(const uint8_t x, const uint8_t y);
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/** Set LCD cursor. If not enabled, only remember it. */
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#define CURSOR_NONE 0b00
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#define CURSOR_BAR 0b10
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#define CURSOR_BLINK 0b01
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#define CURSOR_BOTH 0b11
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void lcd_cursor(uint8_t type);
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/** Display display (preserving cursor) */
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void lcd_disable();
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/** Enable display (restoring cursor) */
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void lcd_enable();
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/** Go home */
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void lcd_home();
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/** Clear the screen */
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void lcd_clear();
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/** Define a glyph - 8 bytes, right 5 bits are used */
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void lcd_glyph(const uint8_t index, const uint8_t* array);
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/** Define a glyph that's in PROGMEM */
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void lcd_glyph_P(const uint8_t index, const uint8_t* array);
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/** Set address in CGRAM */
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void lcd_addr_cg(const uint8_t acg);
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/** Set address in DDRAM */
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void lcd_addr(const uint8_t add);
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