void hd44780_init(void)
{
/* init io pins */
CTRL_OUTPUT();
PIN_CLEAR(HD44780_RS);
PIN_CLEAR(HD44780_EN);
#ifdef HAVE_HD44780_RW
PIN_CLEAR(HD44780_RW);
#endif
PIN_CLEAR(HD44780_D4);
PIN_CLEAR(HD44780_D5);
PIN_CLEAR(HD44780_D6);
PIN_CLEAR(HD44780_D7);
DATA_OUTPUT();
_delay_ms(40);
PIN_SET(HD44780_D4);
PIN_SET(HD44780_D5);
clock_write();
_delay_ms(4);
clock_write();
_delay_ms(1);
clock_write();
/* init done */
_delay_ms(1);
PIN_CLEAR(HD44780_D4);
clock_write();
_delay_ms(1);
/* configure for 4 bit, 2 lines, 5x9 font (datasheet, page 24) */
output_byte(0, CMD_FUNCTIONSET(0, 1, 0));
/* turn on display, cursor and blinking */
hd44780_config(0,0);
/* clear display */
hd44780_clear();
/* set shift and increment */
output_byte(0, CMD_ENTRY_MODE(1, 0));
/* set ddram address */
output_byte(0, CMD_SETDRAMADR(0));
/* open file descriptor */
lcd = fdevopen(hd44780_put, NULL);
/* set current virtual postion */
current_pos = 0;
}
void hd44780_init(void)
{
/* verschiedene Hardware initialisieren */
hd44780_hw_init();
_delay_ms(40);
#if HD44780_TYPE == HD44780_KS0066U
/* Hardware initialisiert -> Standardprozedur KS0066U Datenblatt 4bit Mode */
output_nibble(0, 0x02);
#else
/* Hardware initialisiert -> Standardprozedur HD44780 Datenblatt 4bit Mode */
output_nibble(0, 0x03);
_delay_ms(4);
clock_write();
_delay_ms(1);
clock_write();
_delay_ms(1);
output_nibble(0, 0x02); //4bit mode
_delay_ms(1);
/* init done */
#endif
/* configure for 4 bit, 2 lines, 5x9 font (datasheet, page 24) */
output_byte(0, CMD_FUNCTIONSET(0, 1, 0));
/* turn on display, cursor and blinking */
hd44780_config(0,0);
/* clear display */
hd44780_clear();
/* set shift and increment */
output_byte(0, CMD_ENTRY_MODE(1, 0));
/* set ddram address */
output_byte(0, CMD_SETDRAMADR(0));
/* open file descriptor */
lcd = fdevopen(hd44780_put, NULL);
/* set current virtual postion */
current_pos = 0;
}
int hd44780_put(char d, FILE *stream)
{
uint8_t start = 0;
#ifdef HD44780_MULTIENSUPPORT
uint8_t en = 1;
#endif
if (d == '\n') {
while (current_pos % LCD_CHAR_PER_LINE > 0)
hd44780_put(' ', stream);
if (current_pos >= LCD_MAX_CHAR)
current_pos -= LCD_MAX_CHAR;
return 0;
} else if (d == '\r') {
current_pos -= current_pos % LCD_CHAR_PER_LINE;
return 0;
}
if (current_pos <= LCD_CHAR_PER_LINE - 1)
{
start = LCD_LINE_1_ADR - 0 + current_pos;
#ifdef HD44780_MULTIENSUPPORT
en = LCD_LINE_1_EN;
#endif
}
else if (current_pos <= ( LCD_CHAR_PER_LINE * 2) - 1 )
{
start = LCD_LINE_2_ADR - LCD_CHAR_PER_LINE + current_pos;
#ifdef HD44780_MULTIENSUPPORT
en = LCD_LINE_2_EN;
#endif
}
else if (current_pos <= ( LCD_CHAR_PER_LINE * 3) - 1 )
{
start = LCD_LINE_3_ADR - (LCD_CHAR_PER_LINE * 2) + current_pos;
#ifdef HD44780_MULTIENSUPPORT
en = LCD_LINE_3_EN;
#endif
}
else if (current_pos <= ( LCD_CHAR_PER_LINE * 4) - 1 )
{
start = LCD_LINE_4_ADR - (LCD_CHAR_PER_LINE * 3) + current_pos;
#ifdef HD44780_MULTIENSUPPORT
en = LCD_LINE_4_EN;
#endif
}
#ifdef HD44780_MULTIENSUPPORT
output_byte(0, CMD_SETDRAMADR(start), en);
#else
output_byte(0, CMD_SETDRAMADR(start), 1);
#endif
#ifdef DEBUG_HD44780
_delay_ms(50);
#endif
#ifdef HD44780_MULTIENSUPPORT
output_byte(1, d, en);
#else
output_byte(1, d, 1);
#endif
current_pos++;
if (current_pos == LCD_MAX_CHAR)
current_pos = 0;
return 0;
}
int hd44780_put(char d, FILE *stream)
{
uint8_t start = 0;
if (d == '\n') {
while (current_pos % 20 > 0)
hd44780_put(' ', stream);
if (current_pos >= 80)
current_pos -= 80;
return 0;
} else if (d == '\r') {
current_pos -= current_pos % 20;
return 0;
}
#if HD44780_TYPE == HD44780_ORIGINAL
if (current_pos <= 19)
start = 0x00 - 00 + current_pos;
else if (current_pos <= 39)
start = 0x20 - 20 + current_pos;
else if (current_pos <= 59)
start = 0x40 - 40 + current_pos;
else if (current_pos <= 79)
start = 0x60 - 60 + current_pos;
#elif HD44780_TYPE == HD44780_DISPTECH
if (current_pos <= 19)
start = 0x00 - 0 + current_pos;
else if (current_pos <= 39)
start = 0x40 - 20 + current_pos;
else if (current_pos <= 59)
start = 0x10 - 40 + current_pos;
else if (current_pos <= 79)
start = 0x50 - 60 + current_pos;
#elif HD44780_TYPE == HD44780_KS0067B
if (current_pos <= 19)
start = 0x00 - 0 + current_pos;
else if (current_pos <= 39)
start = 0x40 - 20 + current_pos;
else if (current_pos <= 59)
start = 0x14 - 40 + current_pos;
else if (current_pos <= 79)
start = 0x54 - 60 + current_pos;
#elif HD44780_TYPE == HD44780_KS0066U
if (current_pos <= 19)
start = 0x00 - 0 + current_pos;
else if (current_pos <= 39)
start = 0x40 - 20 + current_pos;
else if (current_pos <= 59)
start = 0x10 - 40 + current_pos;
else if (current_pos <= 79)
start = 0x50 - 60 + current_pos;
#else
#error "unknown hd44780 compatible controller type!"
#endif
output_byte(0, CMD_SETDRAMADR(start));
#ifdef DEBUG_HD44780
_delay_ms(50);
#endif
output_byte(1, d);
current_pos++;
if (current_pos == 80)
current_pos = 0;
return 0;
}
void hd44780_init(void)
{
/* verschiedene Hardware initialisieren */
hd44780_hw_init();
_delay_ms(40);
#if CONF_HD44780_TYPE == HD44780_KS0066U
/* Hardware initialisiert -> Standardprozedur KS0066U Datenblatt 4bit Mode */
output_nibble(0, 0x02, 1);
#else
/* Hardware initialisiert -> Standardprozedur HD44780 Datenblatt 4bit Mode */
output_nibble(0, 0x03,1);
_delay_ms(4);
#ifdef HD44780_2WIRE
output_nibble(0, 0x03,1);
#else
clock_write(1);
#endif /*HD44780_2WIRE*/
_delay_ms(1);
#ifdef HD44780_2WIRE
output_nibble(0, 0x03,1);
#else
clock_write(1);
#endif /*HD44780_2WIRE*/
_delay_ms(1);
output_nibble(0, 0x02,1); //4bit mode
_delay_ms(1);
/* init done */
#endif /*CONF_HD44780_TYPE*/
/* configure for 4 bit, 2 lines, 5x8 font (datasheet, page 24) */
output_byte(0, CMD_FUNCTIONSET(0, 1, 0), 1);
/* turn on display, cursor and blinking */
hd44780_config(0,0,1);
/* clear display */
hd44780_clear(1);
/* set shift and increment */
output_byte(0, CMD_ENTRY_MODE(1, 0),1);
/* set ddram address */
output_byte(0, CMD_SETDRAMADR(0),1);
/*Configure Controller 2 */
#ifdef HD44780_MULTIENSUPPORT
/* verschiedene Hardware initialisieren */
hd44780_hw_init();
_delay_ms(40);
#if CONF_HD44780_TYPE == HD44780_KS0066U
/* Hardware initialisiert -> Standardprozedur KS0066U Datenblatt 4bit Mode */
output_nibble(0, 0x02, 2);
#else
/* Hardware initialisiert -> Standardprozedur HD44780 Datenblatt 4bit Mode */
output_nibble(0, 0x03,2);
_delay_ms(4);
clock_write(2);
_delay_ms(1);
clock_write(2);
_delay_ms(1);
output_nibble(0, 0x02,2); //4bit mode
_delay_ms(1);
/* init done */
#endif
/* configure for 4 bit, 2 lines, 5x9 font (datasheet, page 24) */
output_byte(0, CMD_FUNCTIONSET(0, 1, 0), 2);
/* turn on display, cursor and blinking */
hd44780_config(0,0,2);
/* clear display */
hd44780_clear(2);
/* set shift and increment */
output_byte(0, CMD_ENTRY_MODE(1, 0),2);
/* set ddram address */
output_byte(0, CMD_SETDRAMADR(0),2);
#endif
/* set current virtual postion */
current_pos = 0;
}
