diff options
Diffstat (limited to 'drivers/avr/hd44780.c')
| -rw-r--r-- | drivers/avr/hd44780.c | 510 |
1 files changed, 227 insertions, 283 deletions
diff --git a/drivers/avr/hd44780.c b/drivers/avr/hd44780.c index 51414d8f91..f71069dece 100644 --- a/drivers/avr/hd44780.c +++ b/drivers/avr/hd44780.c @@ -3,7 +3,7 @@ Author: Peter Fleury <pfleury@gmx.ch> 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 + Software: AVR-GCC 3.3 Target: any AVR device, memory mapped mode only for AT90S4414/8515/Mega DESCRIPTION @@ -13,15 +13,15 @@ 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 + 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> @@ -29,55 +29,54 @@ #include <util/delay.h> #include "hd44780.h" -/* -** constants/macros +/* +** constants/macros */ -#define DDR(x) (*(&x - 1)) /* address of data direction register of port x */ +#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)) ) +/* 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 */ +# 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) +# 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 +# if LCD_LINES == 1 +# define LCD_FUNCTION_DEFAULT LCD_FUNCTION_4BIT_1LINE +# else +# define LCD_FUNCTION_DEFAULT LCD_FUNCTION_4BIT_2LINES +# endif #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 +# 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 +# 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 */ +# 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 #endif -/* -** function prototypes +/* +** function prototypes */ #if LCD_IO_MODE static void toggle_e(void); @@ -87,93 +86,83 @@ static void toggle_e(void); ** 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) - +#define delay(us) _delay_us(us) #if LCD_IO_MODE /* toggle Enable Pin to initiate write */ -static void toggle_e(void) -{ +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 + 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 ; - +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(); + 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 */ + 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) ) - { + 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); + 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_DATA0_PORT = dataBits | (data & 0x0F); lcd_e_toggle(); /* all data pins high (inactive) */ LCD_DATA0_PORT = dataBits | 0x0F; - } - else - { + } 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); + 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(); - + 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); @@ -182,85 +171,81 @@ static void lcd_write(uint8_t data,uint8_t rs) } } #else -#define lcd_write(d,rs) if (rs) *(volatile uint8_t*)(LCD_IO_DATA) = d; else *(volatile uint8_t*)(LCD_IO_FUNCTION) = d; +# 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 +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) -{ +static uint8_t lcd_read(uint8_t rs) { uint8_t data; - - + if (rs) - lcd_rs_high(); /* RS=1: read data */ + 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_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_delay(); + data = PIN(LCD_DATA0_PORT) << 4; /* read high nibble first */ lcd_e_low(); - - lcd_e_delay(); /* Enable 500ns low */ - + + lcd_e_delay(); /* Enable 500ns low */ + lcd_e_high(); lcd_e_delay(); - data |= PIN(LCD_DATA0_PORT)&0x0F; /* read low nibble */ + data |= PIN(LCD_DATA0_PORT) & 0x0F; /* read low nibble */ lcd_e_low(); - } - else - { + } 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(); + 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; + 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_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; + 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) +# 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 *************************************************************************/ @@ -268,65 +253,62 @@ static uint8_t lcd_waitbusy(void) { register uint8_t c; - + /* wait until busy flag is cleared */ - while ( (c=lcd_read(0)) & (1<<LCD_BUSY)) {} - + 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 */ +} /* lcd_waitbusy */ /************************************************************************* -Move cursor to the start of next line or to the first line if the cursor +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) -{ +static inline void lcd_newline(uint8_t pos) { register uint8_t addressCounter; - -#if LCD_LINES==1 +#if LCD_LINES == 1 addressCounter = 0; #endif -#if LCD_LINES==2 - if ( pos < (LCD_START_LINE2) ) +#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 ) +#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) ) + else if ((pos >= LCD_START_LINE2) && (pos < LCD_START_LINE3)) addressCounter = LCD_START_LINE3; - else if ( (pos >= LCD_START_LINE3) && (pos < LCD_START_LINE4) ) + else if ((pos >= LCD_START_LINE3) && (pos < LCD_START_LINE4)) addressCounter = LCD_START_LINE4; - else + else addressCounter = LCD_START_LINE1; -#else - if ( pos < LCD_START_LINE3 ) +# else + if (pos < LCD_START_LINE3) addressCounter = LCD_START_LINE2; - else if ( (pos >= LCD_START_LINE2) && (pos < LCD_START_LINE4) ) + else if ((pos >= LCD_START_LINE2) && (pos < LCD_START_LINE4)) addressCounter = LCD_START_LINE3; - else if ( (pos >= LCD_START_LINE3) && (pos < LCD_START_LINE2) ) + else if ((pos >= LCD_START_LINE3) && (pos < LCD_START_LINE2)) addressCounter = LCD_START_LINE4; - else + else addressCounter = LCD_START_LINE1; +# endif #endif -#endif - lcd_command((1<<LCD_DDRAM)+addressCounter); - -}/* lcd_newline */ + lcd_command((1 << LCD_DDRAM) + addressCounter); +} /* lcd_newline */ /* -** PUBLIC FUNCTIONS +** PUBLIC FUNCTIONS */ /************************************************************************* @@ -334,132 +316,107 @@ Send LCD controller instruction command Input: instruction to send to LCD controller, see HD44780 data sheet Returns: none *************************************************************************/ -void lcd_command(uint8_t cmd) -{ +void lcd_command(uint8_t cmd) { lcd_waitbusy(); - lcd_write(cmd,0); + lcd_write(cmd, 0); } - /************************************************************************* -Send data byte to LCD controller +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) -{ +void lcd_data(uint8_t data) { lcd_waitbusy(); - lcd_write(data,1); + 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); +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); +#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); + 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); +#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); + lcd_command((1 << LCD_DDRAM) + LCD_START_LINE4 + x); #endif -}/* lcd_gotoxy */ - +} /* lcd_gotoxy */ /************************************************************************* *************************************************************************/ -int lcd_getxy(void) -{ - return lcd_waitbusy(); -} - +int lcd_getxy(void) { return lcd_waitbusy(); } /************************************************************************* Clear display and set cursor to home position *************************************************************************/ -void lcd_clrscr(void) -{ - lcd_command(1<<LCD_CLR); -} - +void lcd_clrscr(void) { lcd_command(1 << LCD_CLR); } /************************************************************************* Set cursor to home position *************************************************************************/ -void lcd_home(void) -{ - lcd_command(1<<LCD_HOME); -} - +void lcd_home(void) { lcd_command(1 << LCD_HOME); } /************************************************************************* -Display character at current cursor position -Input: character to be displayed +Display character at current cursor position +Input: character to be displayed Returns: none *************************************************************************/ -void lcd_putc(char c) -{ +void lcd_putc(char c) { uint8_t pos; - - pos = lcd_waitbusy(); // read busy-flag and address counter - if (c=='\n') - { + 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); + } 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 == 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); +# 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 +# endif lcd_waitbusy(); #endif lcd_write(c, 1); } -}/* lcd_putc */ - +} /* lcd_putc */ /************************************************************************* -Display string without auto linefeed +Display string without auto linefeed Input: string to be displayed Returns: none *************************************************************************/ @@ -468,16 +425,15 @@ void lcd_puts(const char *s) { register char c; - while ( (c = *s++) ) { + while ((c = *s++)) { lcd_putc(c); } -}/* lcd_puts */ - +} /* lcd_puts */ /************************************************************************* -Display string from program memory without auto linefeed -Input: string from program memory be be displayed +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) @@ -485,108 +441,96 @@ void lcd_puts_p(const char *progmem_s) { register char c; - while ( (c = pgm_read_byte(progmem_s++)) ) { + while ((c = pgm_read_byte(progmem_s++))) { lcd_putc(c); } -}/* lcd_puts_p */ - +} /* lcd_puts_p */ /************************************************************************* -Initialize display and select type of cursor +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) -{ +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 ) ) - { + + 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) ) - { + } 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 - { + 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_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 */ - + 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_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); /* 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 */ - + 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 */ + 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_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() */ + 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 */ + + /* 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 */ + 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); + 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 */ + 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 */ + 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 */ |