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83 lines
3.1 KiB
C
83 lines
3.1 KiB
C
/*
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* Author: Jon Trulson <jtrulson@ics.com>
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* Copyright (c) 2015 Intel Corporation.
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*
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* Permission is hereby granted, free of charge, to any person obtaining
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* a copy of this software and associated documentation files (the
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* "Software"), to deal in the Software without restriction, including
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* without limitation the rights to use, copy, modify, merge, publish,
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* distribute, sublicense, and/or sell copies of the Software, and to
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* permit persons to whom the Software is furnished to do so, subject to
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* the following conditions:
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*
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* The above copyright notice and this permission notice shall be
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* included in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
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* LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
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* OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
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* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*/
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#pragma once
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// This file contains bit definitions for the HD44780 and compatible
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// LCD controllers. It is used primarily my the lcm1602 driver and
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// it's derivatives.
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//
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// Those values (DATA, CMD) are specific to the implementation of the
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// i2C expander in use, so may not be appropriate for inclusion into
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// this file. But for now, we will leave them here.
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#include <stdint.h>
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// commands
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const uint8_t HD44780_CLEARDISPLAY = 0x01;
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const uint8_t HD44780_RETURNHOME = 0x02;
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const uint8_t HD44780_ENTRYMODESET = 0x04;
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const uint8_t HD44780_DISPLAYCONTROL = 0x08;
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const uint8_t HD44780_CURSORSHIFT = 0x10;
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const uint8_t HD44780_FUNCTIONSET = 0x20;
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// flags for display entry mode
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const uint8_t HD44780_ENTRYRIGHT = 0x00;
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const uint8_t HD44780_ENTRYLEFT = 0x02;
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const uint8_t HD44780_ENTRYSHIFTINCREMENT = 0x01;
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const uint8_t HD44780_ENTRYSHIFTDECREMENT = 0x00;
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// flags for display on/off control
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const uint8_t HD44780_DISPLAYON = 0x04;
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const uint8_t HD44780_DISPLAYOFF = 0x00;
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const uint8_t HD44780_CURSORON = 0x02;
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const uint8_t HD44780_CURSOROFF = 0x00;
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const uint8_t HD44780_BLINKON = 0x01;
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const uint8_t HD44780_BLINKOFF = 0x00;
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// flags for display/cursor shift
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const uint8_t HD44780_DISPLAYMOVE = 0x08;
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const uint8_t HD44780_MOVERIGHT = 0x04;
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const uint8_t HD44780_MOVELEFT = 0x00;
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// flags for function set
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const uint8_t HD44780_8BITMODE = 0x10;
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const uint8_t HD44780_4BITMODE = 0x00;
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const uint8_t HD44780_2LINE = 0x08;
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const uint8_t HD44780_1LINE = 0x00;
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const uint8_t HD44780_5x10DOTS = 0x04;
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const uint8_t HD44780_5x8DOTS = 0x00;
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// flags for CGRAM
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const uint8_t HD44780_SETCGRAMADDR = 0x40;
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// may be implementation specific
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const uint8_t HD44780_EN = 0x04; // Enable bit
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const uint8_t HD44780_RW = 0x02; // Read/Write bit
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const uint8_t HD44780_RS = 0x01; // Register select bit
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const uint8_t HD44780_DATA = 0x40;
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const uint8_t HD44780_CMD = 0x80;
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const uint8_t HD44780_BACKLIGHT = 0x08;
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const uint8_t HD44780_NOBACKLIGHT = 0x00;
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