Subversion Repositories group.electronics

Rev

Rev 42 | Rev 44 | Go to most recent revision | Details | Compare with Previous | Last modification | View Log | RSS feed

Rev Author Line No. Line
42 pfowler 1 
#include <avr/io.h>
2 
#include "wire.h"
3 
#include "lcd.h"
43 pfowler 4 
#include "macros.h"
42 pfowler 5 
#include <util/delay.h>
6 
 
43 pfowler 7 
 
42 pfowler 8 
void lcd_init() {
9 
	lcd_sendNib(0x30);
43 pfowler 10 
	_delay_ms(150);
11 
 
42 pfowler 12 
	lcd_sendNib(0x30);
43 pfowler 13 
	_delay_ms(150);
14 
 
42 pfowler 15 
	lcd_sendNib(0x30);
43 pfowler 16 
	_delay_ms(50);
17 
 
42 pfowler 18 
	lcd_sendNib(0x20);
43 pfowler 19 
	_delay_ms(50);
42 pfowler 20 
 
43 pfowler 21 
	lcd_command(LCD_FUNCTIONSET | LCD_2LINE);
22 
	_delay_ms(50);
23 
 
42 pfowler 24 
	lcd_command(LCD_DISPLAYCONTROL | LCD_DISPLAYON | LCD_CURSOROFF | LCD_BLINKOFF);
43 pfowler 25 
	_delay_ms(50);
42 pfowler 26 
 
27 
	lcd_command(LCD_CLEARDISPLAY);
43 pfowler 28 
	_delay_ms(50);
42 pfowler 29 
 
30 
	lcd_command(LCD_RETURNHOME);
43 pfowler 31 
	_delay_ms(50);
42 pfowler 32 
}
33 
 
34 
void lcd_command(uint8_t data) {
35 
	lcd_send(data, LCD_MODE_CM);
36 
}
37 
 
38 
void lcd_char(uint8_t data) {
39 
	lcd_send(data, LCD_MODE_RS);
40 
}
41 
 
42 
 
43 
void lcd_send(uint8_t value, uint8_t mode) {
44 
	uint8_t high = value & 0xf0;
45 
	uint8_t low = (value << 4) & 0xf0;
46 
	lcd_sendNib((high)|mode);
47 
	lcd_sendNib((low)|mode);
48 
}
49 
 
50 
void lcd_sendNib(uint8_t nib) {
43 pfowler 51 
	//lcd_write(nib);
42 pfowler 52 
	lcd_pulse(nib);
53 
}
54 
 
55 
void lcd_write(uint8_t data) {
56 
	i2c_beginTransmission(LCD_ADDR);
57 
	i2c_writeByte((int) data | 0x08);
58 
	i2c_endTransmission(1);
59 
}
60 
 
61 
void lcd_pulse(uint8_t data) {
62 
	lcd_write(data | LCD_MODE_EN);
43 pfowler 63 
	_delay_us(40);
42 pfowler 64 
 
43 pfowler 65 
	//lcd_write(data & ~LCD_MODE_EN);
66 
	lcd_write(data );
67 
	_delay_us(40);
42 pfowler 68 
}