1 /* 2 * Author: Jon Trulson <jtrulson (at) ics.com> 3 * Copyright (c) 2015 Intel Corporation. 4 * 5 * Permission is hereby granted, free of charge, to any person obtaining 6 * a copy of this software and associated documentation files (the 7 * "Software"), to deal in the Software without restriction, including 8 * without limitation the rights to use, copy, modify, merge, publish, 9 * distribute, sublicense, and/or sell copies of the Software, and to 10 * permit persons to whom the Software is furnished to do so, subject to 11 * the following conditions: 12 * 13 * The above copyright notice and this permission notice shall be 14 * included in all copies or substantial portions of the Software. 15 * 16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 17 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 18 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 19 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE 20 * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION 21 * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION 22 * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. 23 */ 24 #pragma once 25 26 // This file contains bit definitions for the HD44780 and compatible 27 // LCD controllers. They are used by most drivers in this (LCD) 28 // library, though the SSD controllers only seem to make use of the 29 // LCD_DATA and LCD_CMD values. 30 // 31 // Those values (DATA, CMD) are specific to the implementation of the 32 // i2C expander in use, so may not be appropriate for inclusion into 33 // this file. But for now, we will leave them here. 34 35 #include <stdint.h> 36 37 namespace upm 38 { 39 // commands 40 const uint8_t LCD_CLEARDISPLAY = 0x01; 41 const uint8_t LCD_RETURNHOME = 0x02; 42 const uint8_t LCD_ENTRYMODESET = 0x04; 43 const uint8_t LCD_DISPLAYCONTROL = 0x08; 44 const uint8_t LCD_CURSORSHIFT = 0x10; 45 const uint8_t LCD_FUNCTIONSET = 0x20; 46 47 const uint8_t LCD_BACKLIGHT = 0x08; 48 const uint8_t LCD_NOBACKLIGHT = 0x00; 49 50 // flags for display entry mode 51 const uint8_t LCD_ENTRYRIGHT = 0x00; 52 const uint8_t LCD_ENTRYLEFT = 0x02; 53 const uint8_t LCD_ENTRYSHIFTINCREMENT = 0x01; 54 const uint8_t LCD_ENTRYSHIFTDECREMENT = 0x00; 55 56 // flags for display on/off control 57 const uint8_t LCD_DISPLAYON = 0x04; 58 const uint8_t LCD_DISPLAYOFF = 0x00; 59 const uint8_t LCD_CURSORON = 0x02; 60 const uint8_t LCD_CURSOROFF = 0x00; 61 const uint8_t LCD_BLINKON = 0x01; 62 const uint8_t LCD_BLINKOFF = 0x00; 63 64 // flags for display/cursor shift 65 const uint8_t LCD_DISPLAYMOVE = 0x08; 66 const uint8_t LCD_MOVERIGHT = 0x04; 67 const uint8_t LCD_MOVELEFT = 0x00; 68 69 // flags for function set 70 const uint8_t LCD_8BITMODE = 0x10; 71 const uint8_t LCD_4BITMODE = 0x00; 72 const uint8_t LCD_2LINE = 0x08; 73 const uint8_t LCD_1LINE = 0x00; 74 const uint8_t LCD_5x10DOTS = 0x04; 75 const uint8_t LCD_5x8DOTS = 0x00; 76 77 // flags for CGRAM 78 const uint8_t LCD_SETCGRAMADDR = 0x40; 79 80 // may be implementation specific 81 const uint8_t LCD_EN = 0x04; // Enable bit 82 const uint8_t LCD_RW = 0x02; // Read/Write bit 83 const uint8_t LCD_RS = 0x01; // Register select bit 84 const uint8_t LCD_DATA = 0x40; 85 const uint8_t LCD_CMD = 0x80; 86 } 87
