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| author | Joel Challis <[email protected]> | 2021-08-17 23:43:09 +0100 | 
|---|---|---|
| committer | GitHub <[email protected]> | 2021-08-17 23:43:09 +0100 | 
| commit | 1bb7af4d446174b7181c9bb22dbd14c93642ea10 (patch) | |
| tree | 894eceeb29cc2c00f6b0f08a4ca177da7f172424 /platforms/avr/drivers/hd44780.c | |
| parent | 483691dd73e5260fac958c524e0a12e705db43f6 (diff) | |
| download | qmk_firmware-1bb7af4d446174b7181c9bb22dbd14c93642ea10.tar.gz qmk_firmware-1bb7af4d446174b7181c9bb22dbd14c93642ea10.zip | |
Relocate platform specific drivers (#13894)
* Relocate platform specific drivers
* Move stm eeprom
* Tidy up slightly
Diffstat (limited to 'platforms/avr/drivers/hd44780.c')
| -rw-r--r-- | platforms/avr/drivers/hd44780.c | 536 | 
1 files changed, 536 insertions, 0 deletions
| diff --git a/platforms/avr/drivers/hd44780.c b/platforms/avr/drivers/hd44780.c new file mode 100644 index 0000000000..f71069dece --- /dev/null +++ b/platforms/avr/drivers/hd44780.c @@ -0,0 +1,536 @@ +/**************************************************************************** + Title:     HD44780U LCD library + Author:    Peter Fleury <[email protected]>  http://tinyurl.com/peterfleury + License:   GNU General Public License Version 3 + File:	    $Id: lcd.c,v 1.15.2.2 2015/01/17 12:16:05 peter Exp $ + Software:  AVR-GCC 3.3 + Target:    any AVR device, memory mapped mode only for AT90S4414/8515/Mega + + DESCRIPTION +       Basic routines for interfacing a HD44780U-based text lcd display + +       Originally based on Volker Oth's lcd library, +       changed lcd_init(), added additional constants for lcd_command(), +       added 4-bit I/O mode, improved and optimized code. + +       Library can be operated in memory mapped mode (LCD_IO_MODE=0) or in +       4-bit IO port mode (LCD_IO_MODE=1). 8-bit IO port mode not supported. + +       Memory mapped mode compatible with Kanda STK200, but supports also +       generation of R/W signal through A8 address line. + + USAGE +       See the C include lcd.h file for a description of each function + +*****************************************************************************/ +#include <inttypes.h> +#include <avr/io.h> +#include <avr/pgmspace.h> +#include <util/delay.h> +#include "hd44780.h" + +/* +** constants/macros +*/ +#define DDR(x) (*(&x - 1)) /* address of data direction register of port x */ +#if defined(__AVR_ATmega64__) || defined(__AVR_ATmega128__) +/* on ATmega64/128 PINF is on port 0x00 and not 0x60 */ +#    define PIN(x) (&PORTF == &(x) ? _SFR_IO8(0x00) : (*(&x - 2))) +#else +#    define PIN(x) (*(&x - 2)) /* address of input register of port x          */ +#endif + +#if LCD_IO_MODE +#    define lcd_e_delay() _delay_us(LCD_DELAY_ENABLE_PULSE) +#    define lcd_e_high() LCD_E_PORT |= _BV(LCD_E_PIN); +#    define lcd_e_low() LCD_E_PORT &= ~_BV(LCD_E_PIN); +#    define lcd_e_toggle() toggle_e() +#    define lcd_rw_high() LCD_RW_PORT |= _BV(LCD_RW_PIN) +#    define lcd_rw_low() LCD_RW_PORT &= ~_BV(LCD_RW_PIN) +#    define lcd_rs_high() LCD_RS_PORT |= _BV(LCD_RS_PIN) +#    define lcd_rs_low() LCD_RS_PORT &= ~_BV(LCD_RS_PIN) +#endif + +#if LCD_IO_MODE +#    if LCD_LINES == 1 +#        define LCD_FUNCTION_DEFAULT LCD_FUNCTION_4BIT_1LINE +#    else +#        define LCD_FUNCTION_DEFAULT LCD_FUNCTION_4BIT_2LINES +#    endif +#else +#    if LCD_LINES == 1 +#        define LCD_FUNCTION_DEFAULT LCD_FUNCTION_8BIT_1LINE +#    else +#        define LCD_FUNCTION_DEFAULT LCD_FUNCTION_8BIT_2LINES +#    endif +#endif + +#if LCD_CONTROLLER_KS0073 +#    if LCD_LINES == 4 + +#        define KS0073_EXTENDED_FUNCTION_REGISTER_ON 0x2C  /* |0|010|1100 4-bit mode, extension-bit RE = 1 */ +#        define KS0073_EXTENDED_FUNCTION_REGISTER_OFF 0x28 /* |0|010|1000 4-bit mode, extension-bit RE = 0 */ +#        define KS0073_4LINES_MODE 0x09                    /* |0|000|1001 4 lines mode */ + +#    endif +#endif + +/* +** function prototypes +*/ +#if LCD_IO_MODE +static void toggle_e(void); +#endif + +/* +** local functions +*/ + +/************************************************************************* +delay for a minimum of <us> microseconds +the number of loops is calculated at compile-time from MCU clock frequency +*************************************************************************/ +#define delay(us) _delay_us(us) + +#if LCD_IO_MODE +/* toggle Enable Pin to initiate write */ +static void toggle_e(void) { +    lcd_e_high(); +    lcd_e_delay(); +    lcd_e_low(); +} +#endif + +/************************************************************************* +Low-level function to write byte to LCD controller +Input:    data   byte to write to LCD +          rs     1: write data +                 0: write instruction +Returns:  none +*************************************************************************/ +#if LCD_IO_MODE +static void lcd_write(uint8_t data, uint8_t rs) { +    unsigned char dataBits; + +    if (rs) { /* write data        (RS=1, RW=0) */ +        lcd_rs_high(); +    } else { /* write instruction (RS=0, RW=0) */ +        lcd_rs_low(); +    } +    lcd_rw_low(); /* RW=0  write mode      */ + +    if ((&LCD_DATA0_PORT == &LCD_DATA1_PORT) && (&LCD_DATA1_PORT == &LCD_DATA2_PORT) && (&LCD_DATA2_PORT == &LCD_DATA3_PORT) && (LCD_DATA0_PIN == 0) && (LCD_DATA1_PIN == 1) && (LCD_DATA2_PIN == 2) && (LCD_DATA3_PIN == 3)) { +        /* configure data pins as output */ +        DDR(LCD_DATA0_PORT) |= 0x0F; + +        /* output high nibble first */ +        dataBits       = LCD_DATA0_PORT & 0xF0; +        LCD_DATA0_PORT = dataBits | ((data >> 4) & 0x0F); +        lcd_e_toggle(); + +        /* output low nibble */ +        LCD_DATA0_PORT = dataBits | (data & 0x0F); +        lcd_e_toggle(); + +        /* all data pins high (inactive) */ +        LCD_DATA0_PORT = dataBits | 0x0F; +    } else { +        /* configure data pins as output */ +        DDR(LCD_DATA0_PORT) |= _BV(LCD_DATA0_PIN); +        DDR(LCD_DATA1_PORT) |= _BV(LCD_DATA1_PIN); +        DDR(LCD_DATA2_PORT) |= _BV(LCD_DATA2_PIN); +        DDR(LCD_DATA3_PORT) |= _BV(LCD_DATA3_PIN); + +        /* output high nibble first */ +        LCD_DATA3_PORT &= ~_BV(LCD_DATA3_PIN); +        LCD_DATA2_PORT &= ~_BV(LCD_DATA2_PIN); +        LCD_DATA1_PORT &= ~_BV(LCD_DATA1_PIN); +        LCD_DATA0_PORT &= ~_BV(LCD_DATA0_PIN); +        if (data & 0x80) LCD_DATA3_PORT |= _BV(LCD_DATA3_PIN); +        if (data & 0x40) LCD_DATA2_PORT |= _BV(LCD_DATA2_PIN); +        if (data & 0x20) LCD_DATA1_PORT |= _BV(LCD_DATA1_PIN); +        if (data & 0x10) LCD_DATA0_PORT |= _BV(LCD_DATA0_PIN); +        lcd_e_toggle(); + +        /* output low nibble */ +        LCD_DATA3_PORT &= ~_BV(LCD_DATA3_PIN); +        LCD_DATA2_PORT &= ~_BV(LCD_DATA2_PIN); +        LCD_DATA1_PORT &= ~_BV(LCD_DATA1_PIN); +        LCD_DATA0_PORT &= ~_BV(LCD_DATA0_PIN); +        if (data & 0x08) LCD_DATA3_PORT |= _BV(LCD_DATA3_PIN); +        if (data & 0x04) LCD_DATA2_PORT |= _BV(LCD_DATA2_PIN); +        if (data & 0x02) LCD_DATA1_PORT |= _BV(LCD_DATA1_PIN); +        if (data & 0x01) LCD_DATA0_PORT |= _BV(LCD_DATA0_PIN); +        lcd_e_toggle(); + +        /* all data pins high (inactive) */ +        LCD_DATA0_PORT |= _BV(LCD_DATA0_PIN); +        LCD_DATA1_PORT |= _BV(LCD_DATA1_PIN); +        LCD_DATA2_PORT |= _BV(LCD_DATA2_PIN); +        LCD_DATA3_PORT |= _BV(LCD_DATA3_PIN); +    } +} +#else +#    define lcd_write(d, rs)                        \ +        if (rs)                                     \ +            *(volatile uint8_t *)(LCD_IO_DATA) = d; \ +        else                                        \ +            *(volatile uint8_t *)(LCD_IO_FUNCTION) = d; +/* rs==0 -> write instruction to LCD_IO_FUNCTION */ +/* rs==1 -> write data to LCD_IO_DATA */ +#endif + +/************************************************************************* +Low-level function to read byte from LCD controller +Input:    rs     1: read data +                 0: read busy flag / address counter +Returns:  byte read from LCD controller +*************************************************************************/ +#if LCD_IO_MODE +static uint8_t lcd_read(uint8_t rs) { +    uint8_t data; + +    if (rs) +        lcd_rs_high(); /* RS=1: read data      */ +    else +        lcd_rs_low(); /* RS=0: read busy flag */ +    lcd_rw_high();    /* RW=1  read mode      */ + +    if ((&LCD_DATA0_PORT == &LCD_DATA1_PORT) && (&LCD_DATA1_PORT == &LCD_DATA2_PORT) && (&LCD_DATA2_PORT == &LCD_DATA3_PORT) && (LCD_DATA0_PIN == 0) && (LCD_DATA1_PIN == 1) && (LCD_DATA2_PIN == 2) && (LCD_DATA3_PIN == 3)) { +        DDR(LCD_DATA0_PORT) &= 0xF0; /* configure data pins as input */ + +        lcd_e_high(); +        lcd_e_delay(); +        data = PIN(LCD_DATA0_PORT) << 4; /* read high nibble first */ +        lcd_e_low(); + +        lcd_e_delay(); /* Enable 500ns low       */ + +        lcd_e_high(); +        lcd_e_delay(); +        data |= PIN(LCD_DATA0_PORT) & 0x0F; /* read low nibble        */ +        lcd_e_low(); +    } else { +        /* configure data pins as input */ +        DDR(LCD_DATA0_PORT) &= ~_BV(LCD_DATA0_PIN); +        DDR(LCD_DATA1_PORT) &= ~_BV(LCD_DATA1_PIN); +        DDR(LCD_DATA2_PORT) &= ~_BV(LCD_DATA2_PIN); +        DDR(LCD_DATA3_PORT) &= ~_BV(LCD_DATA3_PIN); + +        /* read high nibble first */ +        lcd_e_high(); +        lcd_e_delay(); +        data = 0; +        if (PIN(LCD_DATA0_PORT) & _BV(LCD_DATA0_PIN)) data |= 0x10; +        if (PIN(LCD_DATA1_PORT) & _BV(LCD_DATA1_PIN)) data |= 0x20; +        if (PIN(LCD_DATA2_PORT) & _BV(LCD_DATA2_PIN)) data |= 0x40; +        if (PIN(LCD_DATA3_PORT) & _BV(LCD_DATA3_PIN)) data |= 0x80; +        lcd_e_low(); + +        lcd_e_delay(); /* Enable 500ns low       */ + +        /* read low nibble */ +        lcd_e_high(); +        lcd_e_delay(); +        if (PIN(LCD_DATA0_PORT) & _BV(LCD_DATA0_PIN)) data |= 0x01; +        if (PIN(LCD_DATA1_PORT) & _BV(LCD_DATA1_PIN)) data |= 0x02; +        if (PIN(LCD_DATA2_PORT) & _BV(LCD_DATA2_PIN)) data |= 0x04; +        if (PIN(LCD_DATA3_PORT) & _BV(LCD_DATA3_PIN)) data |= 0x08; +        lcd_e_low(); +    } +    return data; +} +#else +#    define lcd_read(rs) (rs) ? *(volatile uint8_t *)(LCD_IO_DATA + LCD_IO_READ) : *(volatile uint8_t *)(LCD_IO_FUNCTION + LCD_IO_READ) +/* rs==0 -> read instruction from LCD_IO_FUNCTION */ +/* rs==1 -> read data from LCD_IO_DATA */ +#endif + +/************************************************************************* +loops while lcd is busy, returns address counter +*************************************************************************/ +static uint8_t lcd_waitbusy(void) + +{ +    register uint8_t c; + +    /* wait until busy flag is cleared */ +    while ((c = lcd_read(0)) & (1 << LCD_BUSY)) { +    } + +    /* the address counter is updated 4us after the busy flag is cleared */ +    delay(LCD_DELAY_BUSY_FLAG); + +    /* now read the address counter */ +    return (lcd_read(0));  // return address counter + +} /* lcd_waitbusy */ + +/************************************************************************* +Move cursor to the start of next line or to the first line if the cursor +is already on the last line. +*************************************************************************/ +static inline void lcd_newline(uint8_t pos) { +    register uint8_t addressCounter; + +#if LCD_LINES == 1 +    addressCounter = 0; +#endif +#if LCD_LINES == 2 +    if (pos < (LCD_START_LINE2)) +        addressCounter = LCD_START_LINE2; +    else +        addressCounter = LCD_START_LINE1; +#endif +#if LCD_LINES == 4 +#    if KS0073_4LINES_MODE +    if (pos < LCD_START_LINE2) +        addressCounter = LCD_START_LINE2; +    else if ((pos >= LCD_START_LINE2) && (pos < LCD_START_LINE3)) +        addressCounter = LCD_START_LINE3; +    else if ((pos >= LCD_START_LINE3) && (pos < LCD_START_LINE4)) +        addressCounter = LCD_START_LINE4; +    else +        addressCounter = LCD_START_LINE1; +#    else +    if (pos < LCD_START_LINE3) +        addressCounter = LCD_START_LINE2; +    else if ((pos >= LCD_START_LINE2) && (pos < LCD_START_LINE4)) +        addressCounter = LCD_START_LINE3; +    else if ((pos >= LCD_START_LINE3) && (pos < LCD_START_LINE2)) +        addressCounter = LCD_START_LINE4; +    else +        addressCounter = LCD_START_LINE1; +#    endif +#endif +    lcd_command((1 << LCD_DDRAM) + addressCounter); + +} /* lcd_newline */ + +/* +** PUBLIC FUNCTIONS +*/ + +/************************************************************************* +Send LCD controller instruction command +Input:   instruction to send to LCD controller, see HD44780 data sheet +Returns: none +*************************************************************************/ +void lcd_command(uint8_t cmd) { +    lcd_waitbusy(); +    lcd_write(cmd, 0); +} + +/************************************************************************* +Send data byte to LCD controller +Input:   data to send to LCD controller, see HD44780 data sheet +Returns: none +*************************************************************************/ +void lcd_data(uint8_t data) { +    lcd_waitbusy(); +    lcd_write(data, 1); +} + +/************************************************************************* +Set cursor to specified position +Input:    x  horizontal position  (0: left most position) +          y  vertical position    (0: first line) +Returns:  none +*************************************************************************/ +void lcd_gotoxy(uint8_t x, uint8_t y) { +#if LCD_LINES == 1 +    lcd_command((1 << LCD_DDRAM) + LCD_START_LINE1 + x); +#endif +#if LCD_LINES == 2 +    if (y == 0) +        lcd_command((1 << LCD_DDRAM) + LCD_START_LINE1 + x); +    else +        lcd_command((1 << LCD_DDRAM) + LCD_START_LINE2 + x); +#endif +#if LCD_LINES == 4 +    if (y == 0) +        lcd_command((1 << LCD_DDRAM) + LCD_START_LINE1 + x); +    else if (y == 1) +        lcd_command((1 << LCD_DDRAM) + LCD_START_LINE2 + x); +    else if (y == 2) +        lcd_command((1 << LCD_DDRAM) + LCD_START_LINE3 + x); +    else /* y==3 */ +        lcd_command((1 << LCD_DDRAM) + LCD_START_LINE4 + x); +#endif + +} /* lcd_gotoxy */ + +/************************************************************************* +*************************************************************************/ +int lcd_getxy(void) { return lcd_waitbusy(); } + +/************************************************************************* +Clear display and set cursor to home position +*************************************************************************/ +void lcd_clrscr(void) { lcd_command(1 << LCD_CLR); } + +/************************************************************************* +Set cursor to home position +*************************************************************************/ +void lcd_home(void) { lcd_command(1 << LCD_HOME); } + +/************************************************************************* +Display character at current cursor position +Input:    character to be displayed +Returns:  none +*************************************************************************/ +void lcd_putc(char c) { +    uint8_t pos; + +    pos = lcd_waitbusy();  // read busy-flag and address counter +    if (c == '\n') { +        lcd_newline(pos); +    } else { +#if LCD_WRAP_LINES == 1 +#    if LCD_LINES == 1 +        if (pos == LCD_START_LINE1 + LCD_DISP_LENGTH) { +            lcd_write((1 << LCD_DDRAM) + LCD_START_LINE1, 0); +        } +#    elif LCD_LINES == 2 +        if (pos == LCD_START_LINE1 + LCD_DISP_LENGTH) { +            lcd_write((1 << LCD_DDRAM) + LCD_START_LINE2, 0); +        } else if (pos == LCD_START_LINE2 + LCD_DISP_LENGTH) { +            lcd_write((1 << LCD_DDRAM) + LCD_START_LINE1, 0); +        } +#    elif LCD_LINES == 4 +        if (pos == LCD_START_LINE1 + LCD_DISP_LENGTH) { +            lcd_write((1 << LCD_DDRAM) + LCD_START_LINE2, 0); +        } else if (pos == LCD_START_LINE2 + LCD_DISP_LENGTH) { +            lcd_write((1 << LCD_DDRAM) + LCD_START_LINE3, 0); +        } else if (pos == LCD_START_LINE3 + LCD_DISP_LENGTH) { +            lcd_write((1 << LCD_DDRAM) + LCD_START_LINE4, 0); +        } else if (pos == LCD_START_LINE4 + LCD_DISP_LENGTH) { +            lcd_write((1 << LCD_DDRAM) + LCD_START_LINE1, 0); +        } +#    endif +        lcd_waitbusy(); +#endif +        lcd_write(c, 1); +    } + +} /* lcd_putc */ + +/************************************************************************* +Display string without auto linefeed +Input:    string to be displayed +Returns:  none +*************************************************************************/ +void lcd_puts(const char *s) +/* print string on lcd (no auto linefeed) */ +{ +    register char c; + +    while ((c = *s++)) { +        lcd_putc(c); +    } + +} /* lcd_puts */ + +/************************************************************************* +Display string from program memory without auto linefeed +Input:     string from program memory be be displayed +Returns:   none +*************************************************************************/ +void lcd_puts_p(const char *progmem_s) +/* print string from program memory on lcd (no auto linefeed) */ +{ +    register char c; + +    while ((c = pgm_read_byte(progmem_s++))) { +        lcd_putc(c); +    } + +} /* lcd_puts_p */ + +/************************************************************************* +Initialize display and select type of cursor +Input:    dispAttr LCD_DISP_OFF            display off +                   LCD_DISP_ON             display on, cursor off +                   LCD_DISP_ON_CURSOR      display on, cursor on +                   LCD_DISP_CURSOR_BLINK   display on, cursor on flashing +Returns:  none +*************************************************************************/ +void lcd_init(uint8_t dispAttr) { +#if LCD_IO_MODE +    /* +     *  Initialize LCD to 4 bit I/O mode +     */ + +    if ((&LCD_DATA0_PORT == &LCD_DATA1_PORT) && (&LCD_DATA1_PORT == &LCD_DATA2_PORT) && (&LCD_DATA2_PORT == &LCD_DATA3_PORT) && (&LCD_RS_PORT == &LCD_DATA0_PORT) && (&LCD_RW_PORT == &LCD_DATA0_PORT) && (&LCD_E_PORT == &LCD_DATA0_PORT) && (LCD_DATA0_PIN == 0) && (LCD_DATA1_PIN == 1) && (LCD_DATA2_PIN == 2) && (LCD_DATA3_PIN == 3) && (LCD_RS_PIN == 4) && (LCD_RW_PIN == 5) && (LCD_E_PIN == 6)) { +        /* configure all port bits as output (all LCD lines on same port) */ +        DDR(LCD_DATA0_PORT) |= 0x7F; +    } else if ((&LCD_DATA0_PORT == &LCD_DATA1_PORT) && (&LCD_DATA1_PORT == &LCD_DATA2_PORT) && (&LCD_DATA2_PORT == &LCD_DATA3_PORT) && (LCD_DATA0_PIN == 0) && (LCD_DATA1_PIN == 1) && (LCD_DATA2_PIN == 2) && (LCD_DATA3_PIN == 3)) { +        /* configure all port bits as output (all LCD data lines on same port, but control lines on different ports) */ +        DDR(LCD_DATA0_PORT) |= 0x0F; +        DDR(LCD_RS_PORT) |= _BV(LCD_RS_PIN); +        DDR(LCD_RW_PORT) |= _BV(LCD_RW_PIN); +        DDR(LCD_E_PORT) |= _BV(LCD_E_PIN); +    } else { +        /* configure all port bits as output (LCD data and control lines on different ports */ +        DDR(LCD_RS_PORT) |= _BV(LCD_RS_PIN); +        DDR(LCD_RW_PORT) |= _BV(LCD_RW_PIN); +        DDR(LCD_E_PORT) |= _BV(LCD_E_PIN); +        DDR(LCD_DATA0_PORT) |= _BV(LCD_DATA0_PIN); +        DDR(LCD_DATA1_PORT) |= _BV(LCD_DATA1_PIN); +        DDR(LCD_DATA2_PORT) |= _BV(LCD_DATA2_PIN); +        DDR(LCD_DATA3_PORT) |= _BV(LCD_DATA3_PIN); +    } +    delay(LCD_DELAY_BOOTUP); /* wait 16ms or more after power-on       */ + +    /* initial write to lcd is 8bit */ +    LCD_DATA1_PORT |= _BV(LCD_DATA1_PIN);  // LCD_FUNCTION>>4; +    LCD_DATA0_PORT |= _BV(LCD_DATA0_PIN);  // LCD_FUNCTION_8BIT>>4; +    lcd_e_toggle(); +    delay(LCD_DELAY_INIT); /* delay, busy flag can't be checked here */ + +    /* repeat last command */ +    lcd_e_toggle(); +    delay(LCD_DELAY_INIT_REP); /* delay, busy flag can't be checked here */ + +    /* repeat last command a third time */ +    lcd_e_toggle(); +    delay(LCD_DELAY_INIT_REP); /* delay, busy flag can't be checked here */ + +    /* now configure for 4bit mode */ +    LCD_DATA0_PORT &= ~_BV(LCD_DATA0_PIN);  // LCD_FUNCTION_4BIT_1LINE>>4 +    lcd_e_toggle(); +    delay(LCD_DELAY_INIT_4BIT); /* some displays need this additional delay */ + +    /* from now the LCD only accepts 4 bit I/O, we can use lcd_command() */ +#else +    /* +     * Initialize LCD to 8 bit memory mapped mode +     */ + +    /* enable external SRAM (memory mapped lcd) and one wait state */ +    MCUCR = _BV(SRE) | _BV(SRW); + +    /* reset LCD */ +    delay(LCD_DELAY_BOOTUP);               /* wait 16ms after power-on     */ +    lcd_write(LCD_FUNCTION_8BIT_1LINE, 0); /* function set: 8bit interface */ +    delay(LCD_DELAY_INIT);                 /* wait 5ms                     */ +    lcd_write(LCD_FUNCTION_8BIT_1LINE, 0); /* function set: 8bit interface */ +    delay(LCD_DELAY_INIT_REP);             /* wait 64us                    */ +    lcd_write(LCD_FUNCTION_8BIT_1LINE, 0); /* function set: 8bit interface */ +    delay(LCD_DELAY_INIT_REP);             /* wait 64us                    */ +#endif + +#if KS0073_4LINES_MODE +    /* Display with KS0073 controller requires special commands for enabling 4 line mode */ +    lcd_command(KS0073_EXTENDED_FUNCTION_REGISTER_ON); +    lcd_command(KS0073_4LINES_MODE); +    lcd_command(KS0073_EXTENDED_FUNCTION_REGISTER_OFF); +#else +    lcd_command(LCD_FUNCTION_DEFAULT);     /* function set: display lines  */ +#endif +    lcd_command(LCD_DISP_OFF);     /* display off                  */ +    lcd_clrscr();                  /* display clear                */ +    lcd_command(LCD_MODE_DEFAULT); /* set entry mode               */ +    lcd_command(dispAttr);         /* display/cursor control       */ + +} /* lcd_init */ | 
