Relocate platform specific drivers (#13894)
* Relocate platform specific drivers * Move stm eeprom * Tidy up slightly
This commit is contained in:
Joel Challis
GitHub
parent
483691dd73
commit
1bb7af4d44
41 changed files with 5 additions and 5 deletions
536
platforms/avr/drivers/hd44780.c
Normal file
536
platforms/avr/drivers/hd44780.c
Normal file
|
|
@ -0,0 +1,536 @@
|
|||
/****************************************************************************
|
||||
Title: HD44780U LCD library
|
||||
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
|
||||
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 */
|
||||
Loading…
Add table
Add a link
Reference in a new issue