spi oled
Fork of TextOLED by
SpiOLED.cpp
- Committer:
- okini3939
- Date:
- 2016-05-19
- Revision:
- 3:c96e6ffd4c43
- Parent:
- TextOLED.cpp@ 2:45788bd06d4c
File content as of revision 3:c96e6ffd4c43:
/* mbed SpiOLED Library, for a spi LCD based on Winstar WEH001602 series * Originl: http://mbed.org/users/simon/libraries/TextLCD/latest * Modified by Suga */ /* mbed TextLCD Library, for a 4-bit LCD based on HD44780 * Copyright (c) 2007-2010, sford, http://mbed.org * * 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 "SpiOLED.h" #include "mbed.h" SpiOLED::SpiOLED(PinName mosi, PinName miso, PinName sclk, PinName cs, LCDType type) : _spi(mosi, miso, sclk), _cs(cs), _type(type) { _cs = 1; _spi.format(10, 3); wait_ms(100); // Wait 15ms to ensure powered up writeCommand(0x38); // Function set 001 BW N F - - writeCommand(0x0C); // 0000 1 D C B writeCommand(0x06); // Entry mode : 0000 01 I/D S writeCommand(0x10); // Cursor and Display Shift 0001 S/C R/L 0 0 writeCommand(0x17); // DCDC on wait_ms(10); writeCommand(0x02); // Home cls(); } void SpiOLED::character(int column, int row, int c) { int a = address(column, row); writeCommand(a); writeData(c); } void SpiOLED::cls() { writeCommand(0x01); // cls, and set cursor to 0 wait_ms(10); // This command takes 1.64 ms locate(0, 0); } void SpiOLED::locate(int column, int row) { _column = column; _row = row; } int SpiOLED::_putc(int value) { if (value == '\n') { _column = 0; _row++; if (_row >= rows()) { _row = 0; } } else { character(_column, _row, value); _column++; if (_column >= columns()) { _column = 0; _row++; if (_row >= rows()) { _row = 0; } } } return value; } int SpiOLED::_getc() { return -1; } void SpiOLED::writeByte(int value, int rs) { int dat; dat = value & 0xff; if (rs) dat |= 0x200; _spi.write(dat); } void SpiOLED::writeCommand(int command) { _cs = 0; wait_us(1); writeByte(command, 0); _cs = 1; } void SpiOLED::writeData(int data) { _cs = 0; wait_us(1); writeByte(data, 1); _cs = 1; } int SpiOLED::isBusy() { int dat; _cs = 0; wait_us(1); _spi.write(0x100); // rs=0, rw=1 dat = _spi.write(0x100); _cs = 1; dat = dat >> 2; return dat & 0x80; } int SpiOLED::address(int column, int row) { switch (_type) { case LCD20x4: switch (row) { case 0: return 0x80 + column; case 1: return 0xc0 + column; case 2: return 0x94 + column; case 3: return 0xd4 + column; } case LCD16x2B: return 0x80 + (row * 40) + column; case LCD16x2: case LCD20x2: case LCD8x2: default: return 0x80 + (row * 0x40) + column; } } int SpiOLED::columns() { switch (_type) { case LCD8x2: return 8; case LCD20x4: case LCD20x2: return 20; case LCD16x2: case LCD16x2B: default: return 16; } } int SpiOLED::rows() { switch (_type) { case LCD20x4: return 4; case LCD16x2: case LCD16x2B: case LCD20x2: case LCD8x2: default: return 2; } } void SpiOLED::cursor (bool flg) { if (flg) { writeCommand(0x0F); // 0000 1 D C B } else { writeCommand(0x0C); // 0000 1 D C B } }