main.c

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/**
 * @file main.c
 * @ingroup hd44780_lcd
 * @author Jason Duffy
 * @date 1st March 2022
 * @brief Example main routine demonstrating the HD44780 based 16x2 liquid
 * crystal display.
 * @bug No known bugs. 
 */
 
#include <util/delay.h>
#include <avr/power.h>
 
#include "hd44780_lcd.h"
 
#define MESSAGE_DELAY       2000
#define ANIMATION_DELAY     300
 
 
// Lcd configuration object
lcd_config_t lcd_config =
{
    .eight_bit_mode = false,    // true = 8 bit mode, false = 4 bit mode
    .two_line_display = true,   // true = 2 lines, false = 1 line
    .five_by_ten_font = false,  // true = 5x10 dots, false = 5x8 dots
    .increment_counter = true,  // true = increment, false = decrement
    .display_shift = false,     // true = display shift, false = cursor shift
    .cursor_enable = false,     // true = enabled, false = disabled
    .blink_enable = false,      // true = enabled, false = disabled
};
 
uint8_t test_number = 34;
 
int main()
{
    // Setup
    init_lcd(&lcd_config);
 
    // Loop forever
    for(;;)
    {
        lcd_fast_clear();
        lcd_return_home();
        lcd_print_string("  HD44780  LCD  ");
        lcd_set_cursor(0,1);
        lcd_print_string("    example.    ");
        _delay_ms(MESSAGE_DELAY);
 
        lcd_fast_clear();
        lcd_return_home();
 
        lcd_config.cursor_enable = true;
        lcd_reconfigure();
        lcd_print_string("Cursor can be:");
        lcd_set_cursor(0,1);
        lcd_print_string("enabled:");
        _delay_ms(MESSAGE_DELAY);
 
        lcd_set_cursor(0,1);
        lcd_print_string("shifted left");
        _delay_ms(ANIMATION_DELAY);
 
        for (uint8_t count = 0; count < 12; ++count)
        {
            lcd_shift_cursor_left(1);
            _delay_ms(ANIMATION_DELAY);
        }
        _delay_ms(MESSAGE_DELAY);
 
        lcd_set_cursor(0,1);
        lcd_print_string("shifted right        ");
        lcd_set_cursor(0,1);
        _delay_ms(ANIMATION_DELAY);
 
        for (uint8_t count = 0; count < 12; ++count)
        {
            lcd_shift_cursor_right(1);
            _delay_ms(ANIMATION_DELAY);
        }
        _delay_ms(MESSAGE_DELAY);
 
        lcd_config.blink_enable = true;
        lcd_reconfigure();
        lcd_set_cursor(0,1);
        lcd_print_string("with blink:     ");
        lcd_set_cursor(11,1);
        _delay_ms(MESSAGE_DELAY);
 
        lcd_config.blink_enable = false;
        lcd_config.cursor_enable = false;
        lcd_reconfigure();
        lcd_set_cursor(0,1);
        lcd_print_string("  disabled:");
        _delay_ms(MESSAGE_DELAY);
 
        lcd_fast_clear();
        lcd_set_cursor(0,0);
        lcd_print_string("Print integer:");
        lcd_set_cursor(0,1);
        lcd_print_integer(test_number);
        _delay_ms(MESSAGE_DELAY);
 
        lcd_fast_clear();
        lcd_set_cursor(0,0);
        lcd_print_string("Display");
        lcd_set_cursor(0,1);
        lcd_print_string("<shift>");
        lcd_shift_display_right(9, true);
        lcd_shift_display_left(9, true);
        _delay_ms(MESSAGE_DELAY);
    }
}