390 lines
11 KiB
C++
390 lines
11 KiB
C++
#include "LiquidCrystalRus.h"
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#include <stdio.h>
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#include <string.h>
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#include <inttypes.h>
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#include <avr/pgmspace.h>
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#if defined(ARDUINO) && ARDUINO >= 100
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#include "Arduino.h"
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#else
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#include "WProgram.h"
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#endif
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// it is a Russian alphabet translation
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// except 0401 --> 0xa2 = ╗, 0451 --> 0xb5
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const PROGMEM uint8_t utf_recode[] =
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{ 0x41,0xa0,0x42,0xa1,0xe0,0x45,0xa3,0xa4,0xa5,0xa6,0x4b,0xa7,0x4d,0x48,0x4f,
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0xa8,0x50,0x43,0x54,0xa9,0xaa,0x58,0xe1,0xab,0xac,0xe2,0xad,0xae,0x62,0xaf,0xb0,0xb1,
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0x61,0xb2,0xb3,0xb4,0xe3,0x65,0xb6,0xb7,0xb8,0xb9,0xba,0xbb,0xbc,0xbd,0x6f,
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0xbe,0x70,0x63,0xbf,0x79,0xe4,0x78,0xe5,0xc0,0xc1,0xe6,0xc2,0xc3,0xc4,0xc5,0xc6,0xc7
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};
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// When the display powers up, it is configured as follows:
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//
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// 1. Display clear
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// 2. Function set:
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// DL = 1; 8-bit interface data
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// N = 0; 1-line display
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// F = 0; 5x8 dot character font
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// 3. Display on/off control:
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// D = 0; Display off
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// C = 0; Cursor off
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// B = 0; Blinking off
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// 4. Entry mode set:
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// I/D = 1; Increment by 1
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// S = 0; No shift
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//
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// Note, however, that resetting the Arduino doesn't reset the LCD, so we
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// can't assume that it's in that state when a sketch starts (and the
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// LiquidCrystal constructor is called).
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//
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// modified 27 Jul 2011
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// by Ilya V. Danilov http://mk90.ru/
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LiquidCrystalRus::LiquidCrystalRus(uint8_t rs, uint8_t rw, uint8_t enable,
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uint8_t d0, uint8_t d1, uint8_t d2, uint8_t d3,
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uint8_t d4, uint8_t d5, uint8_t d6, uint8_t d7)
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{
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init(0, rs, rw, enable, d0, d1, d2, d3, d4, d5, d6, d7);
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}
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LiquidCrystalRus::LiquidCrystalRus(uint8_t rs, uint8_t enable,
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uint8_t d0, uint8_t d1, uint8_t d2, uint8_t d3,
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uint8_t d4, uint8_t d5, uint8_t d6, uint8_t d7)
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{
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init(0, rs, 255, enable, d0, d1, d2, d3, d4, d5, d6, d7);
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}
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LiquidCrystalRus::LiquidCrystalRus(uint8_t rs, uint8_t rw, uint8_t enable,
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uint8_t d0, uint8_t d1, uint8_t d2, uint8_t d3)
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{
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init(1, rs, rw, enable, d0, d1, d2, d3, 0, 0, 0, 0);
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}
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LiquidCrystalRus::LiquidCrystalRus(uint8_t rs, uint8_t enable,
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uint8_t d0, uint8_t d1, uint8_t d2, uint8_t d3)
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{
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init(1, rs, 255, enable, d0, d1, d2, d3, 0, 0, 0, 0);
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}
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void LiquidCrystalRus::init(uint8_t fourbitmode, uint8_t rs, uint8_t rw, uint8_t enable,
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uint8_t d0, uint8_t d1, uint8_t d2, uint8_t d3,
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uint8_t d4, uint8_t d5, uint8_t d6, uint8_t d7)
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{
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_rs_pin = rs;
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_rw_pin = rw;
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_enable_pin = enable;
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_data_pins[0] = d0;
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_data_pins[1] = d1;
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_data_pins[2] = d2;
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_data_pins[3] = d3;
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_data_pins[4] = d4;
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_data_pins[5] = d5;
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_data_pins[6] = d6;
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_data_pins[7] = d7;
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pinMode(_rs_pin, OUTPUT);
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// we can save 1 pin by not using RW. Indicate by passing 255 instead of pin#
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if (_rw_pin != 255) {
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pinMode(_rw_pin, OUTPUT);
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}
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pinMode(_enable_pin, OUTPUT);
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if (fourbitmode)
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_displayfunction = LCD_4BITMODE | LCD_1LINE | LCD_5x8DOTS;
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else
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_displayfunction = LCD_8BITMODE | LCD_1LINE | LCD_5x8DOTS;
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begin(16, 1);
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}
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void LiquidCrystalRus::begin(uint8_t cols, uint8_t lines, uint8_t dotsize) {
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if (lines > 1) {
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_displayfunction |= LCD_2LINE;
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}
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_numlines = lines;
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_currline = 0;
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// for some 1 line displays you can select a 10 pixel high font
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if ((dotsize != 0) && (lines == 1)) {
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_displayfunction |= LCD_5x10DOTS;
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}
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// SEE PAGE 45/46 FOR INITIALIZATION SPECIFICATION!
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// according to datasheet, we need at least 40ms after power rises above 2.7V
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// before sending commands. Arduino can turn on way before 4.5V so we'll wait 50
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delayMicroseconds(50000);
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// Now we pull both RS and R/W low to begin commands
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digitalWrite(_rs_pin, LOW);
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digitalWrite(_enable_pin, LOW);
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if (_rw_pin != 255) {
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digitalWrite(_rw_pin, LOW);
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}
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//put the LCD into 4 bit or 8 bit mode
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if (! (_displayfunction & LCD_8BITMODE)) {
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// this is according to the Hitachi HD44780 datasheet
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// figure 24, pg 46
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// we start in 8bit mode, try to set 4 bit mode
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writeNbits(0x03,4);
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delayMicroseconds(4500); // wait min 4.1ms
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// second try
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writeNbits(0x03,4);
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delayMicroseconds(4500); // wait min 4.1ms
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// third go!
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writeNbits(0x03,4);
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delayMicroseconds(150);
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// finally, set to 8-bit interface
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writeNbits(0x02,4);
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} else {
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// this is according to the Hitachi HD44780 datasheet
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// page 45 figure 23
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// Send function set command sequence
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command(LCD_FUNCTIONSET | _displayfunction);
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delayMicroseconds(4500); // wait more than 4.1ms
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// second try
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command(LCD_FUNCTIONSET | _displayfunction);
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delayMicroseconds(150);
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// third go
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command(LCD_FUNCTIONSET | _displayfunction);
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}
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// finally, set # lines, font size, etc.
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command(LCD_FUNCTIONSET | _displayfunction);
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// turn the display on with no cursor or blinking default
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_displaycontrol = LCD_DISPLAYON | LCD_CURSOROFF | LCD_BLINKOFF;
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display();
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// clear it off
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clear();
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// Initialize to default text direction (for romance languages)
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_displaymode = LCD_ENTRYLEFT | LCD_ENTRYSHIFTDECREMENT;
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// set the entry mode
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command(LCD_ENTRYMODESET | _displaymode);
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}
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void LiquidCrystalRus::setDRAMModel(uint8_t model) {
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_dram_model = model;
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}
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/********** high level commands, for the user! */
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void LiquidCrystalRus::clear()
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{
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command(LCD_CLEARDISPLAY); // clear display, set cursor position to zero
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delayMicroseconds(2000); // this command takes a long time!
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}
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void LiquidCrystalRus::home()
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{
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command(LCD_RETURNHOME); // set cursor position to zero
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delayMicroseconds(2000); // this command takes a long time!
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}
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void LiquidCrystalRus::setCursor(uint8_t col, uint8_t row)
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{
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int row_offsets[] = { 0x00, 0x40, 0x14, 0x54 };
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if ( row >= _numlines ) {
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row = _numlines-1; // we count rows starting w/0
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}
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command(LCD_SETDDRAMADDR | (col + row_offsets[row]));
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}
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// Turn the display on/off (quickly)
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void LiquidCrystalRus::noDisplay() {
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_displaycontrol &= ~LCD_DISPLAYON;
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command(LCD_DISPLAYCONTROL | _displaycontrol);
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}
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void LiquidCrystalRus::display() {
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_displaycontrol |= LCD_DISPLAYON;
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command(LCD_DISPLAYCONTROL | _displaycontrol);
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}
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// Turns the underline cursor on/off
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void LiquidCrystalRus::noCursor() {
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_displaycontrol &= ~LCD_CURSORON;
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command(LCD_DISPLAYCONTROL | _displaycontrol);
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}
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void LiquidCrystalRus::cursor() {
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_displaycontrol |= LCD_CURSORON;
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command(LCD_DISPLAYCONTROL | _displaycontrol);
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}
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// Turn on and off the blinking cursor
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void LiquidCrystalRus::noBlink() {
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_displaycontrol &= ~LCD_BLINKON;
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command(LCD_DISPLAYCONTROL | _displaycontrol);
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}
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void LiquidCrystalRus::blink() {
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_displaycontrol |= LCD_BLINKON;
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command(LCD_DISPLAYCONTROL | _displaycontrol);
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}
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// These commands scroll the display without changing the RAM
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void LiquidCrystalRus::scrollDisplayLeft(void) {
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command(LCD_CURSORSHIFT | LCD_DISPLAYMOVE | LCD_MOVELEFT);
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}
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void LiquidCrystalRus::scrollDisplayRight(void) {
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command(LCD_CURSORSHIFT | LCD_DISPLAYMOVE | LCD_MOVERIGHT);
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}
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// This is for text that flows Left to Right
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void LiquidCrystalRus::leftToRight(void) {
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_displaymode |= LCD_ENTRYLEFT;
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command(LCD_ENTRYMODESET | _displaymode);
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}
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// This is for text that flows Right to Left
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void LiquidCrystalRus::rightToLeft(void) {
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_displaymode &= ~LCD_ENTRYLEFT;
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command(LCD_ENTRYMODESET | _displaymode);
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}
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// This will 'right justify' text from the cursor
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void LiquidCrystalRus::autoscroll(void) {
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_displaymode |= LCD_ENTRYSHIFTINCREMENT;
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command(LCD_ENTRYMODESET | _displaymode);
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}
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// This will 'left justify' text from the cursor
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void LiquidCrystalRus::noAutoscroll(void) {
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_displaymode &= ~LCD_ENTRYSHIFTINCREMENT;
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command(LCD_ENTRYMODESET | _displaymode);
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}
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// Allows us to fill the first 8 CGRAM locations
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// with custom characters
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void LiquidCrystalRus::createChar(uint8_t location, uint8_t charmap[]) {
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location &= 0x7; // we only have 8 locations 0-7
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command(LCD_SETCGRAMADDR | (location << 3));
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for (int i=0; i<8; i++) {
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write(charmap[i]);
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}
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}
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/*********** mid level commands, for sending data/cmds */
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inline void LiquidCrystalRus::command(uint8_t value) {
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send(value, LOW);
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}
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#if defined(ARDUINO) && ARDUINO >= 100
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size_t LiquidCrystalRus::write(uint8_t value)
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#else
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void LiquidCrystalRus::write(uint8_t value)
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#endif
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{
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uint8_t out_char=value;
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if (_dram_model == LCD_DRAM_WH1601) {
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uint8_t ac=recv(LOW) & 0x7f;
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if (ac>7 && ac<0x14) command(LCD_SETDDRAMADDR | (0x40+ac-8));
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}
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if (value>=0x80) { // UTF-8 handling
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if (value >= 0xc0) {
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utf_hi_char = value - 0xd0;
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} else {
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value &= 0x3f;
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if (!utf_hi_char && (value == 1))
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send(0xa2,HIGH); // ╗
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else if ((utf_hi_char == 1) && (value == 0x11))
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send(0xb5,HIGH); // ╦
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else
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send(pgm_read_byte_near(utf_recode + value + (utf_hi_char<<6) - 0x10), HIGH);
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}
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} else send(out_char, HIGH);
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#if defined(ARDUINO) && ARDUINO >= 100
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return 1; // assume success
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#endif
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}
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/************ low level data pushing commands **********/
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// write either command or data, with automatic 4/8-bit selection
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void LiquidCrystalRus::send(uint8_t value, uint8_t mode) {
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digitalWrite(_rs_pin, mode);
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// if there is a RW pin indicated, set it low to Write
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if (_rw_pin != 255) {
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digitalWrite(_rw_pin, LOW);
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}
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if (_displayfunction & LCD_8BITMODE) {
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writeNbits(value,8);
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} else {
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writeNbits(value>>4,4);
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writeNbits(value,4);
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}
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}
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// read data, with automatic 4/8-bit selection
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uint8_t LiquidCrystalRus::recv(uint8_t mode) {
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uint8_t retval;
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digitalWrite(_rs_pin, mode);
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// if there is a RW pin indicated, set it low to Write
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if (_rw_pin != 255) {
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digitalWrite(_rw_pin, HIGH);
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}
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if (_displayfunction & LCD_8BITMODE) {
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retval = readNbits(8);
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} else {
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retval = readNbits(4) << 4;
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retval |= readNbits(4);
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}
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return retval;
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}
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void LiquidCrystalRus::pulseEnable() {
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digitalWrite(_enable_pin, LOW);
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delayMicroseconds(1);
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digitalWrite(_enable_pin, HIGH);
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delayMicroseconds(1); // enable pulse must be >450ns
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digitalWrite(_enable_pin, LOW);
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delayMicroseconds(100); // commands need > 37us to settle
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}
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void LiquidCrystalRus::writeNbits(uint8_t value, uint8_t n) {
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for (int i = 0; i < n; i++) {
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pinMode(_data_pins[i], OUTPUT);
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digitalWrite(_data_pins[i], (value >> i) & 0x01);
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}
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pulseEnable();
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}
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uint8_t LiquidCrystalRus::readNbits(uint8_t n) {
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uint8_t retval=0;
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for (int i = 0; i < n; i++) {
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pinMode(_data_pins[i], INPUT);
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}
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digitalWrite(_enable_pin, LOW);
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delayMicroseconds(1);
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digitalWrite(_enable_pin, HIGH);
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delayMicroseconds(1); // enable pulse must be >450ns
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for (int i = 0; i < n; i++) {
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retval |= (digitalRead(_data_pins[i]) == HIGH)?(1 << i):0;
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}
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digitalWrite(_enable_pin, LOW);
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return retval;
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}
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