int16_t parse_cmd_lcd_init(char *cmd, char *output, uint16_t len)
{
uint8_t cursor, blink;
#ifdef TEENSY_SUPPORT
/* Skip leading spaces. */
while(*cmd == ' ') cmd ++;
/* Seek space (blink argument), chop and atoi to `blink'. */
char *p = cmd;
while(*p && *p != ' ') p ++;
if(!*p)
return ECMD_ERR_PARSE_ERROR; /* Required argument `blink' missing. */
*p = 0;
blink = atoi(p + 1);
cursor = atoi(cmd);
#else
int ret = sscanf_P(cmd, PSTR("%hhu %hhu"), &cursor, &blink);
if(ret != 2)
return ECMD_ERR_PARSE_ERROR;
#endif
hd44780_init();
hd44780_config(cursor, blink,1);
return ECMD_FINAL_OK;
}
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;
}
HD44780_Result hd44780_init(HD44780 *display, HD44780_Mode mode,
const HD44780_Config *config, uint8_t cols, uint8_t lines, uint8_t charsize)
{
HD44780_RETURN_ASSERT(display != NULL, HD44780_RESULT_ERROR);
HD44780_RETURN_ASSERT(config != NULL, HD44780_RESULT_ERROR);
HD44780_RETURN_ASSERT(config->gpios != NULL, HD44780_RESULT_ERROR);
HD44780_RETURN_ASSERT(config->gpios->write != NULL, HD44780_RESULT_ERROR);
HD44780_RETURN_ASSERT(config->delay_microseconds != NULL, HD44780_RESULT_ERROR);
HD44780_RETURN_ASSERT(cols > 0, HD44780_RESULT_ERROR);
HD44780_RETURN_ASSERT(lines > 0, HD44780_RESULT_ERROR);
display->cfg = *config;
HD44780_GPIO_Interface *const gpios = display->cfg.gpios;
HD44780_DelayMicrosecondsFn delay_microseconds = display->cfg.delay_microseconds;
if (gpios->configure != NULL)
{
HD44780_RETURN_IF_ERROR(gpios->configure(gpios, HD44780_PIN_RS, HD44780_PINMODE_OUTPUT));
HD44780_RETURN_IF_ERROR(gpios->configure(gpios, HD44780_PIN_ENABLE, HD44780_PINMODE_OUTPUT));
if (display->cfg.options & HD44780_OPT_USE_RW)
HD44780_RETURN_IF_ERROR(gpios->configure(gpios, HD44780_PIN_RW, HD44780_PINMODE_OUTPUT));
if (display->cfg.options & HD44780_OPT_USE_BACKLIGHT)
HD44780_RETURN_IF_ERROR(gpios->configure(gpios, HD44780_PIN_BACKLIGHT, HD44780_PINMODE_OUTPUT));
}
if (display->cfg.options & HD44780_OPT_USE_BACKLIGHT)
HD44780_RETURN_IF_ERROR(gpios->write(gpios, HD44780_PIN_BACKLIGHT, HD44780_PINSTATE_LOW));
if (mode == HD44780_MODE_4BIT)
{
display->displayfunction = HD44780_FLAG_4BITMODE | HD44780_FLAG_1LINE | HD44780_FLAG_5x8DOTS;
display->dp_first = HD44780_PIN_DP4;
display->dp_amount = 4;
}
else
{
display->displayfunction = HD44780_FLAG_8BITMODE | HD44780_FLAG_1LINE | HD44780_FLAG_5x8DOTS;
display->dp_first = HD44780_PIN_DP0;
display->dp_amount = 8;
}
/* For some 1 line displays you can select a 10 pixel high font */
if ((charsize != 0) && (lines == 1))
display->displayfunction |= HD44780_FLAG_5x10DOTS;
if (lines > 1)
display->displayfunction |= HD44780_FLAG_2LINE;
display->columns_amount = cols;
display->lines_amount = lines;
display->currline = 0;
if (hd44780_config(display) != HD44780_RESULT_OK)
return HD44780_RESULT_ERROR;
/* Put the LCD into 4 bit or 8 bit mode */
if (! (display->displayfunction & HD44780_FLAG_8BITMODE))
{
/* This is according to the hitachi HD44780 datasheet figure 24, pg 46 */
/* We start in 8bit mode, try to set 4 bit mode */
HD44780_RETURN_IF_ERROR(hd44780_write_bits(display, 0x03));
delay_microseconds(4500); // wait min 4.1ms
/* Second try */
HD44780_RETURN_IF_ERROR(hd44780_write_bits(display, 0x03));
delay_microseconds(4500); // wait min 4.1ms
/* Third go! */
HD44780_RETURN_IF_ERROR(hd44780_write_bits(display, 0x03));
delay_microseconds(150);
/* Finally, set to 4-bit interface */
HD44780_RETURN_IF_ERROR(hd44780_write_bits(display, 0x02));
}
else
{
/* This is according to the hitachi HD44780 datasheet page 45 figure 23 */
/* Send function set command sequence */
HD44780_RETURN_IF_ERROR(hd44780_command(display, HD44780_CMD_FUNCTIONSET | display->displayfunction));
delay_microseconds(4500); // wait more than 4.1ms
/* Second try */
HD44780_RETURN_IF_ERROR(hd44780_command(display, HD44780_CMD_FUNCTIONSET | display->displayfunction));
delay_microseconds(150);
/* Third go */
HD44780_RETURN_IF_ERROR(hd44780_command(display, HD44780_CMD_FUNCTIONSET | display->displayfunction));
}
/* Finally, set # lines, font size, etc. */
HD44780_RETURN_IF_ERROR(hd44780_command(display, HD44780_CMD_FUNCTIONSET | display->displayfunction));
/* Turn the display on with no cursor or blinking default */
display->displaycontrol = HD44780_FLAG_DISPLAYON | HD44780_FLAG_CURSOROFF | HD44780_FLAG_BLINKOFF;
HD44780_RETURN_IF_ERROR(hd44780_display_on(display));
/* Clear it off */
HD44780_RETURN_IF_ERROR(hd44780_clear(display));
/* Initialize to default text direction (for romance languages) */
display->displaymode = HD44780_FLAG_ENTRYLEFT | HD44780_FLAG_ENTRYSHIFTDECREMENT;
/* Set the entry mode */
HD44780_RETURN_IF_ERROR(hd44780_command(display, HD44780_CMD_ENTRYMODESET | display->displaymode));
return HD44780_RESULT_OK;
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;
}
