TextLCD_595 - this change module NewTextLCD Erik Kerger. It adds the ability to output a simple Russian text, as well as some additional features implemented chip HD44780. The test was carried out on the module module MT-16S2D. The display is connected via SPI bus through to the shift register 74595 (74HC595)
Fork of TextLCD_Rus by
TextLCD_595.cpp
- Committer:
- vbogom
- Date:
- 2015-04-11
- Revision:
- 5:455a2110179d
- Parent:
- 3:e604470d1838
File content as of revision 5:455a2110179d:
/* mbed TextLCD_595 Library, for a 4-bit LCD based on HD44780 * Copyright (c) 2007-2010, sford, http://mbed.org * Changes by Erik Kerger * * * Changes by Bogomazyuk Vasiliy (Богомазюк Василий) * Модуль испытан на жидкокристаллическом модуле MT–16S2D * * * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ #include "TextLCD_595.h" #include "mbed.h" #include <string> #define __nop1 wait_us(1) const unsigned char utf_recode[] = { 0x41,0xa0,0x42,0xa1,0xe0,0x45,0xa3,0xa4, 0xa5,0xa6,0x4b,0xa7,0x4d,0x48,0x4f,0xa8, 0x50,0x43,0x54,0xa9,0xaa,0x58,0xe1,0xab, 0xac,0xe2,0xad,0xae,0x62,0xaf,0xb0,0xb1, 0x61,0xb2,0xb3,0xb4,0xe3,0x65,0xb6,0xb7, 0xb8,0xb9,0xba,0xbb,0xbc,0xbd,0x6f,0xbe, 0x70,0x63,0xbf,0x79,0xe4,0x78,0xe5,0xc0, 0xc1,0xe6,0xc2,0xc3,0xc4,0xc5,0xc6,0xc7 }; int ConvertChar(int c) { int i=c; if ((c>=0xD090)and(c<=0xD0BF))i=utf_recode[c-0xD090]; if ((c>=0xD180)and(c<=0xD18F))i=utf_recode[c-0xD150]; if (c==0xD081) i=0xA2; if (c==0xD191) i=0xB5; return i; } #define _BL 0x40 #define _RS 0x10 #define _E 0x20 #define _D4 0x01 #define _D5 0x02 #define _D6 0x04 #define _D7 0x08 TextLCD_595::TextLCD_595(SPI *spi, PinName CS, LCDType type) : _spi(spi), _cs(CS), _type(type) { _spi->format(8,0); _spi->frequency(1000000); _cs = 0; _spi->write(0x0); _cs = 1; if (_type != LCDuser) setLCDparam(_type); // otherwise rows, colums, comdelay, adresses must be set before wait(0.050f); // Wait 50ms to ensure powered up // send "Display Settings" 3 times (Only top nibble of 0x30 as we've got 4-bit bus) // this sets controler into 8 bit mode, so we have a defined state for (int i=0; i<3; i++) { _cs = 0; _spi->write(_E); _cs = 1; __nop1; _cs = 0; _spi->write(_E|_D4|_D5); _cs = 1; __nop1; _cs = 0; _spi->write(_D4|_D5); _cs = 1; wait_us(LCDparam.delay); } _cs = 0; _spi->write(_E|_D4|_D5); _cs = 1; __nop1; _cs = 0; _spi->write(_E|_D5); _cs = 1; __nop1; _cs = 0; _spi->write(_D5); _cs = 1; wait_us(LCDparam.delay); _comm = _D5; writeCommand(0x28); // Function set 4 Bit, 2Line, 5*7 writeCommand(0x08); // Display off cls(); // clear display, reset _column and _row writeCommand(0x04); // cursor right, Display is not shifted _bl=_BL; // Backlight on writeCommand(0x0C); // Display on , Cursor off _setCursor=0x0; //Курсор выключен и не мигает } void TextLCD_595::character(int column, int row, int c) { int a = 0x80 | (LCDparam.adresses[row & 3] + column); writeCommand(a); // set cursor address writeData(c); // write char } void TextLCD_595::cls() { writeCommand(0x01); // cls, and set cursor to 0 locate(0, 0); // set internal position wait_us(45 * LCDparam.delay); // CLS need much time } void TextLCD_595::locate(int column, int row) { _column = column; // set position for next char _row = row; // note: cursor is not set yet } int TextLCD_595::_putc(int value) { if (value == '\n') { _column = 0; _row++; if (_row >= LCDparam.rows) { _row = 0; } } else { character(_column, _row, value); _column++; if (_column >= LCDparam.columns) { _column = 0; _row++; if (_row >= LCDparam.rows) { _row = 0; } } } return value; } // Dummy function - read not supported int TextLCD_595::_getc() { return -1; } void TextLCD_595::writeByte(int value) { _cs = 0; _spi->write(_E|_bl|_comm); _cs = 1; __nop1; _comm = value >> 4; // higher nibble first _cs = 0; _spi->write(_E|_bl|_comm); _cs = 1; __nop1; _cs = 0; _spi->write(_bl|_comm); _cs = 1; __nop1; _cs = 0; _spi->write(_E|_bl|_comm); _cs = 1; __nop1; _comm = value & 0x0F; // then lower _cs = 0; _spi->write(_E|_bl|_comm); _cs = 1; __nop1; _cs = 0; _spi->write(_bl|_comm); _cs = 1; __nop1; } void TextLCD_595::writeByteData(int value) { _cs = 0; _spi->write(_RS|_bl|_comm); _cs = 1; __nop1; _cs = 0; _spi->write(_E|_RS|_bl|_comm); _cs = 1; __nop1; _comm = value >> 4; // higher nibble first _cs = 0; _spi->write(_E|_RS|_bl|_comm); _cs = 1; __nop1; _cs = 0; _spi->write(_RS|_bl|_comm); _cs = 1; __nop1; _cs = 0; _spi->write(_E|_RS|_bl|_comm); _cs = 1; __nop1; _comm = value & 0x0F; // then lower _cs = 0; _spi->write(_E|_RS|_bl|_comm); _cs = 1; __nop1; _cs = 0; _spi->write(_RS|_bl|_comm); _cs = 1; wait_us(LCDparam.delay); _cs = 0; _spi->write(_bl|_comm); _cs = 1; __nop1; } void TextLCD_595::writeCommand(int command) { writeByte(command); wait_us(LCDparam.delay); } void TextLCD_595::writeData(int data) { writeByteData(data); wait_us(LCDparam.delay); } // set user defined char void TextLCD_595::writeCGRAM(int address, int pattern[8]){ int i; address = address & 7; //max 8 char for(i=0;i<8;i++){ writeCommand(0x40 | (address * 8) + i); writeData(pattern[i]); } } void TextLCD_595::setLCDparam(LCDType _type){ switch (_type) { case LCD16x2: case LCD16x2B: LCDparam.columns = 16; break; case LCD20x2: case LCD20x4: LCDparam.columns = 20; break; case LCD24x2: LCDparam.columns = 24; break; } if (_type == LCD20x4) LCDparam.rows = 4; else LCDparam.rows = 2; LCDparam.adresses[0] = 0; if (_type == LCD16x2B) LCDparam.adresses[1] = 40; else LCDparam.adresses[1] = 0x40; if (_type == LCD20x4) { LCDparam.adresses[2] = 0x14; LCDparam.adresses[3] = 0x54;} else { LCDparam.adresses[2] = 0; LCDparam.adresses[3] = 0;} LCDparam.delay = 50; // 50 us delays as default } int TextLCD_595::putc_rus(int c) { return putc(ConvertChar(c)); } void TextLCD_595::print_rus(const string rustext){ int len = rustext.length(); for (int i=0; i<len; i++) { uint16_t temp=uint8_t(rustext[i]); i++; temp=temp<<8|uint8_t(rustext[i]); putc(ConvertChar(temp)); }; } void TextLCD_595::ShiftLCD_Left() { writeCommand(0x18); } void TextLCD_595::ShiftLCD_Right() { writeCommand(0x1C); } void TextLCD_595::ShiftCursor_Left() { writeCommand(0x10); } void TextLCD_595::ShiftCursor_Right() { writeCommand(0x14); } void TextLCD_595::home() { writeCommand(0x2); } void TextLCD_595::on() { writeCommand(0xC|_setCursor); } void TextLCD_595::off() { writeCommand(0x8|_setCursor); } void TextLCD_595::SetCursor(int modeCursor) { _setCursor=modeCursor; writeCommand(0xC|_setCursor); } void TextLCD_595::CursorPosition(int column, int row) { //Устанавливаем позицию курсора writeCommand(0x80 | (LCDparam.adresses[row & 3] + column)); } void TextLCD_595::BackLightOn(){ _bl=_BL; _cs = 0; _spi->write(_bl|_comm); _cs = 1; __nop1; } void TextLCD_595::BackLightOff(){ _bl=0; _cs = 0; _spi->write(_bl|_comm); _cs = 1; __nop1; }