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/**
* @file lcd.h
* A basic library for writing a 16x2 text LCD.
*
* Copyright (C) 2018 Clyne Sullivan
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <https://www.gnu.org/licenses/>.
*/
#ifndef LCD_H_
#define LCD_H_
#include <stdint.h>
/**
* A handler/task to manage asyncronous LCD writes.
*/
void lcd_handler(void);
/**
* Writes a string asyncronously to the LCD.
* The lcd_handler task must be running for the string to actually be printed.
* @param s the string to write
*/
void lcd_put(const char *s);
//
// The following functions do not support asyncronous calls.
//
/**
* Initializes the LCD.
*/
void lcd_init(void);
/**
* Writes a string to the LCD.
* A cursor position is kept internally. When the end of the screen is reached,
* writing resumes at the first position.
* @param s the string to write
*/
void lcd_puts(const char *s);
/**
* Writes a base 10 integer to the screen.
* @param i the integer to print
*/
void lcd_puti(int i);
/**
* Writes a base 16 integer to the screen.
* @param h the integer to print
*/
void lcd_puth(int h);
/**
* Writes a byte in binary to the screen.
* @param b the byte to print
*/
void lcd_putb(uint8_t b);
/**
* Clears the LCD.
*/
void lcd_clear(void);
#endif // LCD_H_
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