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/*
* ----------------------------------------------------------------------------
* "THE BEER-WARE LICENSE" (Revision 42):
* <joerg@FreeBSD.ORG> wrote this file. As long as you retain this notice you
* can do whatever you want with this stuff. If we meet some day, and you think
* this stuff is worth it, you can buy me a beer in return. Joerg Wunsch
* ----------------------------------------------------------------------------
*
* Stdio demo, upper layer of LCD driver.
*
* $Id: lcd.c,v 1.1 2005/12/28 21:38:59 joerg_wunsch Exp $
*/
#include "defines.h"
#include <stdbool.h>
#include <stdint.h>
#include <stdio.h>
#include <avr/io.h>
#include <util/delay.h>
#include "hd44780.h"
#include "lcd.h"
/*
* Setup the LCD controller. First, call the hardware initialization
* function, then adjust the display attributes we want.
*/
void
lcd_init(void)
{
hd44780_init();
/*
* Clear the display.
*/
hd44780_outcmd(HD44780_CLR);
hd44780_wait_ready();
/*
* Entry mode: auto-increment address counter, no display shift in
* effect.
*/
hd44780_outcmd(HD44780_ENTMODE(1, 0));
hd44780_wait_ready();
/*
* Enable display, activate non-blinking cursor.
*/
hd44780_outcmd(HD44780_DISPCTL(1, 1, 0));
hd44780_wait_ready();
}
/*
* Send character c to the LCD display. After a '\n' has been seen,
* the next character will first clear the display.
*/
int
lcd_putchar(char c, FILE *unused)
{
static bool nl_seen;
if (nl_seen && c != '\n')
{
/*
* First character after newline, clear display and home cursor.
*/
hd44780_wait_ready();
hd44780_outcmd(HD44780_CLR);
hd44780_wait_ready();
hd44780_outcmd(HD44780_HOME);
hd44780_wait_ready();
hd44780_outcmd(HD44780_DDADDR(0));
nl_seen = false;
}
if (c == '\n')
{
nl_seen = true;
}
else
{
hd44780_wait_ready();
hd44780_outdata(c);
}
return 0;
}
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