You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
92 lines
1.9 KiB
C
92 lines
1.9 KiB
C
15 years ago
|
/*
|
||
|
|
* ----------------------------------------------------------------------------
|
||
|
|
* "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;
|
||
|
|
}
|