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/**************************************************************************** |
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Title: HD44780U LCD library |
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Author: Peter Fleury <pfleury@gmx.ch> http://tinyurl.com/peterfleury |
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License: GNU General Public License Version 3 |
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File: $Id: lcd.c,v 1.15.2.2 2015/01/17 12:16:05 peter Exp $ |
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Software: AVR-GCC 3.3 |
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Target: any AVR device, memory mapped mode only for AT90S4414/8515/Mega |
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DESCRIPTION |
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Basic routines for interfacing a HD44780U-based text lcd display |
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Originally based on Volker Oth's lcd library, |
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changed lcd_init(), added additional constants for lcd_command(), |
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added 4-bit I/O mode, improved and optimized code. |
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Library can be operated in memory mapped mode (LCD_IO_MODE=0) or in |
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4-bit IO port mode (LCD_IO_MODE=1). 8-bit IO port mode not supported. |
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Memory mapped mode compatible with Kanda STK200, but supports also |
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generation of R/W signal through A8 address line. |
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USAGE |
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See the C include lcd.h file for a description of each function |
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*****************************************************************************/ |
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#include <inttypes.h> |
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#include <avr/io.h> |
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#include <avr/pgmspace.h> |
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#include <util/delay.h> |
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#include "hd44780.h" |
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/* |
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** constants/macros |
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*/ |
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#define DDR(x) (*(&x - 1)) /* address of data direction register of port x */ |
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#if defined(__AVR_ATmega64__) || defined(__AVR_ATmega128__) |
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/* on ATmega64/128 PINF is on port 0x00 and not 0x60 */ |
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#define PIN(x) ( &PORTF==&(x) ? _SFR_IO8(0x00) : (*(&x - 2)) ) |
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#else |
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#define PIN(x) (*(&x - 2)) /* address of input register of port x */ |
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#endif |
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#if LCD_IO_MODE |
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#define lcd_e_delay() _delay_us(LCD_DELAY_ENABLE_PULSE) |
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#define lcd_e_high() LCD_E_PORT |= _BV(LCD_E_PIN); |
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#define lcd_e_low() LCD_E_PORT &= ~_BV(LCD_E_PIN); |
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#define lcd_e_toggle() toggle_e() |
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#define lcd_rw_high() LCD_RW_PORT |= _BV(LCD_RW_PIN) |
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#define lcd_rw_low() LCD_RW_PORT &= ~_BV(LCD_RW_PIN) |
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#define lcd_rs_high() LCD_RS_PORT |= _BV(LCD_RS_PIN) |
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#define lcd_rs_low() LCD_RS_PORT &= ~_BV(LCD_RS_PIN) |
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#endif |
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#if LCD_IO_MODE |
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#if LCD_LINES==1 |
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#define LCD_FUNCTION_DEFAULT LCD_FUNCTION_4BIT_1LINE |
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#else |
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#define LCD_FUNCTION_DEFAULT LCD_FUNCTION_4BIT_2LINES |
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#endif |
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#else |
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#if LCD_LINES==1 |
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#define LCD_FUNCTION_DEFAULT LCD_FUNCTION_8BIT_1LINE |
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#else |
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#define LCD_FUNCTION_DEFAULT LCD_FUNCTION_8BIT_2LINES |
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#endif |
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#endif |
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#if LCD_CONTROLLER_KS0073 |
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#if LCD_LINES==4 |
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#define KS0073_EXTENDED_FUNCTION_REGISTER_ON 0x2C /* |0|010|1100 4-bit mode, extension-bit RE = 1 */ |
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#define KS0073_EXTENDED_FUNCTION_REGISTER_OFF 0x28 /* |0|010|1000 4-bit mode, extension-bit RE = 0 */ |
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#define KS0073_4LINES_MODE 0x09 /* |0|000|1001 4 lines mode */ |
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#endif |
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#endif |
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/* |
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** function prototypes |
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*/ |
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#if LCD_IO_MODE |
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static void toggle_e(void); |
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#endif |
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/* |
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** local functions |
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*/ |
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/************************************************************************* |
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delay for a minimum of <us> microseconds |
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the number of loops is calculated at compile-time from MCU clock frequency |
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*************************************************************************/ |
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#define delay(us) _delay_us(us) |
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#if LCD_IO_MODE |
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/* toggle Enable Pin to initiate write */ |
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static void toggle_e(void) |
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{ |
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lcd_e_high(); |
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lcd_e_delay(); |
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lcd_e_low(); |
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} |
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#endif |
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/************************************************************************* |
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Low-level function to write byte to LCD controller |
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Input: data byte to write to LCD |
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rs 1: write data |
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0: write instruction |
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Returns: none |
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*************************************************************************/ |
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#if LCD_IO_MODE |
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static void lcd_write(uint8_t data,uint8_t rs) |
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{ |
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unsigned char dataBits ; |
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if (rs) { /* write data (RS=1, RW=0) */ |
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lcd_rs_high(); |
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} else { /* write instruction (RS=0, RW=0) */ |
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lcd_rs_low(); |
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} |
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lcd_rw_low(); /* RW=0 write mode */ |
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if ( ( &LCD_DATA0_PORT == &LCD_DATA1_PORT) && ( &LCD_DATA1_PORT == &LCD_DATA2_PORT ) && ( &LCD_DATA2_PORT == &LCD_DATA3_PORT ) |
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&& (LCD_DATA0_PIN == 0) && (LCD_DATA1_PIN == 1) && (LCD_DATA2_PIN == 2) && (LCD_DATA3_PIN == 3) ) |
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{ |
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/* configure data pins as output */ |
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DDR(LCD_DATA0_PORT) |= 0x0F; |
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/* output high nibble first */ |
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dataBits = LCD_DATA0_PORT & 0xF0; |
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LCD_DATA0_PORT = dataBits |((data>>4)&0x0F); |
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lcd_e_toggle(); |
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/* output low nibble */ |
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LCD_DATA0_PORT = dataBits | (data&0x0F); |
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lcd_e_toggle(); |
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/* all data pins high (inactive) */ |
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LCD_DATA0_PORT = dataBits | 0x0F; |
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} |
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else |
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{ |
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/* configure data pins as output */ |
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DDR(LCD_DATA0_PORT) |= _BV(LCD_DATA0_PIN); |
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DDR(LCD_DATA1_PORT) |= _BV(LCD_DATA1_PIN); |
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DDR(LCD_DATA2_PORT) |= _BV(LCD_DATA2_PIN); |
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DDR(LCD_DATA3_PORT) |= _BV(LCD_DATA3_PIN); |
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/* output high nibble first */ |
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LCD_DATA3_PORT &= ~_BV(LCD_DATA3_PIN); |
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LCD_DATA2_PORT &= ~_BV(LCD_DATA2_PIN); |
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LCD_DATA1_PORT &= ~_BV(LCD_DATA1_PIN); |
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LCD_DATA0_PORT &= ~_BV(LCD_DATA0_PIN); |
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if(data & 0x80) LCD_DATA3_PORT |= _BV(LCD_DATA3_PIN); |
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if(data & 0x40) LCD_DATA2_PORT |= _BV(LCD_DATA2_PIN); |
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if(data & 0x20) LCD_DATA1_PORT |= _BV(LCD_DATA1_PIN); |
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if(data & 0x10) LCD_DATA0_PORT |= _BV(LCD_DATA0_PIN); |
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lcd_e_toggle(); |
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/* output low nibble */ |
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LCD_DATA3_PORT &= ~_BV(LCD_DATA3_PIN); |
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LCD_DATA2_PORT &= ~_BV(LCD_DATA2_PIN); |
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LCD_DATA1_PORT &= ~_BV(LCD_DATA1_PIN); |
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LCD_DATA0_PORT &= ~_BV(LCD_DATA0_PIN); |
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if(data & 0x08) LCD_DATA3_PORT |= _BV(LCD_DATA3_PIN); |
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if(data & 0x04) LCD_DATA2_PORT |= _BV(LCD_DATA2_PIN); |
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if(data & 0x02) LCD_DATA1_PORT |= _BV(LCD_DATA1_PIN); |
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if(data & 0x01) LCD_DATA0_PORT |= _BV(LCD_DATA0_PIN); |
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lcd_e_toggle(); |
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/* all data pins high (inactive) */ |
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LCD_DATA0_PORT |= _BV(LCD_DATA0_PIN); |
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LCD_DATA1_PORT |= _BV(LCD_DATA1_PIN); |
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LCD_DATA2_PORT |= _BV(LCD_DATA2_PIN); |
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LCD_DATA3_PORT |= _BV(LCD_DATA3_PIN); |
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} |
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} |
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#else |
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#define lcd_write(d,rs) if (rs) *(volatile uint8_t*)(LCD_IO_DATA) = d; else *(volatile uint8_t*)(LCD_IO_FUNCTION) = d; |
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/* rs==0 -> write instruction to LCD_IO_FUNCTION */ |
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/* rs==1 -> write data to LCD_IO_DATA */ |
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#endif |
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/************************************************************************* |
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Low-level function to read byte from LCD controller |
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Input: rs 1: read data |
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0: read busy flag / address counter |
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Returns: byte read from LCD controller |
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*************************************************************************/ |
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#if LCD_IO_MODE |
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static uint8_t lcd_read(uint8_t rs) |
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{ |
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uint8_t data; |
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if (rs) |
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lcd_rs_high(); /* RS=1: read data */ |
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else |
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lcd_rs_low(); /* RS=0: read busy flag */ |
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lcd_rw_high(); /* RW=1 read mode */ |
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if ( ( &LCD_DATA0_PORT == &LCD_DATA1_PORT) && ( &LCD_DATA1_PORT == &LCD_DATA2_PORT ) && ( &LCD_DATA2_PORT == &LCD_DATA3_PORT ) |
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&& ( LCD_DATA0_PIN == 0 )&& (LCD_DATA1_PIN == 1) && (LCD_DATA2_PIN == 2) && (LCD_DATA3_PIN == 3) ) |
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{ |
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DDR(LCD_DATA0_PORT) &= 0xF0; /* configure data pins as input */ |
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lcd_e_high(); |
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lcd_e_delay(); |
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data = PIN(LCD_DATA0_PORT) << 4; /* read high nibble first */ |
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lcd_e_low(); |
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lcd_e_delay(); /* Enable 500ns low */ |
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lcd_e_high(); |
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lcd_e_delay(); |
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data |= PIN(LCD_DATA0_PORT)&0x0F; /* read low nibble */ |
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lcd_e_low(); |
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} |
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else |
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{ |
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/* configure data pins as input */ |
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DDR(LCD_DATA0_PORT) &= ~_BV(LCD_DATA0_PIN); |
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DDR(LCD_DATA1_PORT) &= ~_BV(LCD_DATA1_PIN); |
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DDR(LCD_DATA2_PORT) &= ~_BV(LCD_DATA2_PIN); |
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DDR(LCD_DATA3_PORT) &= ~_BV(LCD_DATA3_PIN); |
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/* read high nibble first */ |
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lcd_e_high(); |
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lcd_e_delay(); |
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data = 0; |
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if ( PIN(LCD_DATA0_PORT) & _BV(LCD_DATA0_PIN) ) data |= 0x10; |
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if ( PIN(LCD_DATA1_PORT) & _BV(LCD_DATA1_PIN) ) data |= 0x20; |
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if ( PIN(LCD_DATA2_PORT) & _BV(LCD_DATA2_PIN) ) data |= 0x40; |
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if ( PIN(LCD_DATA3_PORT) & _BV(LCD_DATA3_PIN) ) data |= 0x80; |
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lcd_e_low(); |
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lcd_e_delay(); /* Enable 500ns low */ |
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/* read low nibble */ |
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lcd_e_high(); |
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lcd_e_delay(); |
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if ( PIN(LCD_DATA0_PORT) & _BV(LCD_DATA0_PIN) ) data |= 0x01; |
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if ( PIN(LCD_DATA1_PORT) & _BV(LCD_DATA1_PIN) ) data |= 0x02; |
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if ( PIN(LCD_DATA2_PORT) & _BV(LCD_DATA2_PIN) ) data |= 0x04; |
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if ( PIN(LCD_DATA3_PORT) & _BV(LCD_DATA3_PIN) ) data |= 0x08; |
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lcd_e_low(); |
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} |
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return data; |
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} |
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#else |
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#define lcd_read(rs) (rs) ? *(volatile uint8_t*)(LCD_IO_DATA+LCD_IO_READ) : *(volatile uint8_t*)(LCD_IO_FUNCTION+LCD_IO_READ) |
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/* rs==0 -> read instruction from LCD_IO_FUNCTION */ |
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/* rs==1 -> read data from LCD_IO_DATA */ |
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#endif |
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/************************************************************************* |
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loops while lcd is busy, returns address counter |
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*************************************************************************/ |
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static uint8_t lcd_waitbusy(void) |
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{ |
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register uint8_t c; |
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/* wait until busy flag is cleared */ |
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while ( (c=lcd_read(0)) & (1<<LCD_BUSY)) {} |
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/* the address counter is updated 4us after the busy flag is cleared */ |
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delay(LCD_DELAY_BUSY_FLAG); |
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/* now read the address counter */ |
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return (lcd_read(0)); // return address counter |
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}/* lcd_waitbusy */ |
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/************************************************************************* |
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Move cursor to the start of next line or to the first line if the cursor |
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is already on the last line. |
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*************************************************************************/ |
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static inline void lcd_newline(uint8_t pos) |
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{ |
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register uint8_t addressCounter; |
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#if LCD_LINES==1 |
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addressCounter = 0; |
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#endif |
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#if LCD_LINES==2 |
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if ( pos < (LCD_START_LINE2) ) |
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addressCounter = LCD_START_LINE2; |
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else |
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addressCounter = LCD_START_LINE1; |
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#endif |
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#if LCD_LINES==4 |
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#if KS0073_4LINES_MODE |
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if ( pos < LCD_START_LINE2 ) |
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addressCounter = LCD_START_LINE2; |
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else if ( (pos >= LCD_START_LINE2) && (pos < LCD_START_LINE3) ) |
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addressCounter = LCD_START_LINE3; |
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else if ( (pos >= LCD_START_LINE3) && (pos < LCD_START_LINE4) ) |
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addressCounter = LCD_START_LINE4; |
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else |
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addressCounter = LCD_START_LINE1; |
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#else |
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if ( pos < LCD_START_LINE3 ) |
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addressCounter = LCD_START_LINE2; |
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else if ( (pos >= LCD_START_LINE2) && (pos < LCD_START_LINE4) ) |
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addressCounter = LCD_START_LINE3; |
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else if ( (pos >= LCD_START_LINE3) && (pos < LCD_START_LINE2) ) |
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addressCounter = LCD_START_LINE4; |
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else |
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addressCounter = LCD_START_LINE1; |
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#endif |
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#endif |
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lcd_command((1<<LCD_DDRAM)+addressCounter); |
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}/* lcd_newline */ |
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/* |
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** PUBLIC FUNCTIONS |
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*/ |
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/************************************************************************* |
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Send LCD controller instruction command |
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Input: instruction to send to LCD controller, see HD44780 data sheet |
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Returns: none |
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*************************************************************************/ |
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void lcd_command(uint8_t cmd) |
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{ |
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lcd_waitbusy(); |
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lcd_write(cmd,0); |
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} |
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/************************************************************************* |
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Send data byte to LCD controller |
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Input: data to send to LCD controller, see HD44780 data sheet |
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Returns: none |
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*************************************************************************/ |
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void lcd_data(uint8_t data) |
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{ |
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lcd_waitbusy(); |
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lcd_write(data,1); |
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} |
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/************************************************************************* |
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Set cursor to specified position |
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Input: x horizontal position (0: left most position) |
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y vertical position (0: first line) |
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Returns: none |
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*************************************************************************/ |
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void lcd_gotoxy(uint8_t x, uint8_t y) |
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{ |
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#if LCD_LINES==1 |
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lcd_command((1<<LCD_DDRAM)+LCD_START_LINE1+x); |
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#endif |
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#if LCD_LINES==2 |
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if ( y==0 ) |
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lcd_command((1<<LCD_DDRAM)+LCD_START_LINE1+x); |
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else |
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lcd_command((1<<LCD_DDRAM)+LCD_START_LINE2+x); |
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#endif |
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#if LCD_LINES==4 |
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if ( y==0 ) |
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lcd_command((1<<LCD_DDRAM)+LCD_START_LINE1+x); |
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else if ( y==1) |
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lcd_command((1<<LCD_DDRAM)+LCD_START_LINE2+x); |
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else if ( y==2) |
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lcd_command((1<<LCD_DDRAM)+LCD_START_LINE3+x); |
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else /* y==3 */ |
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lcd_command((1<<LCD_DDRAM)+LCD_START_LINE4+x); |
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#endif |
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}/* lcd_gotoxy */ |
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/************************************************************************* |
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*************************************************************************/ |
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int lcd_getxy(void) |
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{ |
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return lcd_waitbusy(); |
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} |
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/************************************************************************* |
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Clear display and set cursor to home position |
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*************************************************************************/ |
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void lcd_clrscr(void) |
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{ |
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lcd_command(1<<LCD_CLR); |
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} |
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/************************************************************************* |
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Set cursor to home position |
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*************************************************************************/ |
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void lcd_home(void) |
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{ |
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lcd_command(1<<LCD_HOME); |
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} |
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/************************************************************************* |
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Display character at current cursor position |
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Input: character to be displayed |
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Returns: none |
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*************************************************************************/ |
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void lcd_putc(char c) |
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{ |
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uint8_t pos; |
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pos = lcd_waitbusy(); // read busy-flag and address counter |
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if (c=='\n') |
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{ |
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lcd_newline(pos); |
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} |
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else |
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{ |
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#if LCD_WRAP_LINES==1 |
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#if LCD_LINES==1 |
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if ( pos == LCD_START_LINE1+LCD_DISP_LENGTH ) { |
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lcd_write((1<<LCD_DDRAM)+LCD_START_LINE1,0); |
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} |
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#elif LCD_LINES==2 |
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if ( pos == LCD_START_LINE1+LCD_DISP_LENGTH ) { |
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lcd_write((1<<LCD_DDRAM)+LCD_START_LINE2,0); |
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}else if ( pos == LCD_START_LINE2+LCD_DISP_LENGTH ){ |
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lcd_write((1<<LCD_DDRAM)+LCD_START_LINE1,0); |
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} |
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#elif LCD_LINES==4 |
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if ( pos == LCD_START_LINE1+LCD_DISP_LENGTH ) { |
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lcd_write((1<<LCD_DDRAM)+LCD_START_LINE2,0); |
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}else if ( pos == LCD_START_LINE2+LCD_DISP_LENGTH ) { |
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lcd_write((1<<LCD_DDRAM)+LCD_START_LINE3,0); |
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}else if ( pos == LCD_START_LINE3+LCD_DISP_LENGTH ) { |
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lcd_write((1<<LCD_DDRAM)+LCD_START_LINE4,0); |
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}else if ( pos == LCD_START_LINE4+LCD_DISP_LENGTH ) { |
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lcd_write((1<<LCD_DDRAM)+LCD_START_LINE1,0); |
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} |
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#endif |
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lcd_waitbusy(); |
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#endif |
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lcd_write(c, 1); |
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} |
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|
}/* lcd_putc */ |
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/************************************************************************* |
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|
Display string without auto linefeed |
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|
Input: string to be displayed |
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|
Returns: none |
|
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|
*************************************************************************/ |
|
|
|
void lcd_puts(const char *s) |
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|
/* print string on lcd (no auto linefeed) */ |
|
|
|
{ |
|
|
|
register char c; |
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|
|
while ( (c = *s++) ) { |
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|
lcd_putc(c); |
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|
} |
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|
}/* lcd_puts */ |
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|
/************************************************************************* |
|
|
|
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; |
|
|
|
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|
|
|
while ( (c = pgm_read_byte(progmem_s++)) ) { |
|
|
|
lcd_putc(c); |
|
|
|
} |
|
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|
|
|
|
}/* lcd_puts_p */ |
|
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|
|
|
|
|
|
|
|
/************************************************************************* |
|
|
|
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 |
|
|
|
*/ |
|
|
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|
|
|
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 */ |
|
|
|
|