康一 芳賀
TextLCD library for controlling various LCD panels based on the HD44780 4-bit interface
TextLCD.h@1:ac48b187213c, 2010-05-27 (annotated)
- Committer:
- simon
- Date:
- Thu May 27 13:44:15 2010 +0000
- Revision:
- 1:ac48b187213c
- Parent:
- 0:edfb85c53631
- Child:
- 2:227356c7d12c
Who changed what in which revision?
| User | Revision | Line number | New contents of line |
|---|---|---|---|
| simon | 1:ac48b187213c | 1 | /* mbed TextLCD Library, for a 4-bit LCD based on HD44780 |
| simon | 1:ac48b187213c | 2 | * Copyright (c) 2007-2010, sford |
| simon | 1:ac48b187213c | 3 | * |
| simon | 1:ac48b187213c | 4 | * Permission is hereby granted, free of charge, to any person obtaining a copy |
| simon | 1:ac48b187213c | 5 | * of this software and associated documentation files (the "Software"), to deal |
| simon | 1:ac48b187213c | 6 | * in the Software without restriction, including without limitation the rights |
| simon | 1:ac48b187213c | 7 | * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell |
| simon | 1:ac48b187213c | 8 | * copies of the Software, and to permit persons to whom the Software is |
| simon | 1:ac48b187213c | 9 | * furnished to do so, subject to the following conditions: |
| simon | 1:ac48b187213c | 10 | * |
| simon | 1:ac48b187213c | 11 | * The above copyright notice and this permission notice shall be included in |
| simon | 1:ac48b187213c | 12 | * all copies or substantial portions of the Software. |
| simon | 1:ac48b187213c | 13 | * |
| simon | 1:ac48b187213c | 14 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
| simon | 1:ac48b187213c | 15 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| simon | 1:ac48b187213c | 16 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE |
| simon | 1:ac48b187213c | 17 | * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
| simon | 1:ac48b187213c | 18 | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, |
| simon | 1:ac48b187213c | 19 | * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN |
| simon | 1:ac48b187213c | 20 | * THE SOFTWARE. |
| simon | 1:ac48b187213c | 21 | */ |
| simon | 1:ac48b187213c | 22 | |
| simon | 1:ac48b187213c | 23 | #ifndef MBED_TEXTLCD_H |
| simon | 1:ac48b187213c | 24 | #define MBED_TEXTLCD_H |
| simon | 1:ac48b187213c | 25 | |
| simon | 1:ac48b187213c | 26 | #include "mbed.h" |
| simon | 1:ac48b187213c | 27 | class TextLCD : public Stream { |
| simon | 1:ac48b187213c | 28 | public: |
| simon | 1:ac48b187213c | 29 | |
| simon | 1:ac48b187213c | 30 | // the different LCDs and addressing modes |
| simon | 1:ac48b187213c | 31 | /** Select the type of LCD */ |
| simon | 1:ac48b187213c | 32 | enum LCDType { |
| simon | 1:ac48b187213c | 33 | LCD16x2 |
| simon | 1:ac48b187213c | 34 | , LCD16x2B |
| simon | 1:ac48b187213c | 35 | , LCD20x2 |
| simon | 1:ac48b187213c | 36 | , LCD20x4 |
| simon | 1:ac48b187213c | 37 | }; |
| simon | 1:ac48b187213c | 38 | |
| simon | 1:ac48b187213c | 39 | TextLCD(PinName rs, PinName e, PinName d0, PinName d1, PinName d2, PinName d3, LCDType type = LCD16x2); |
| simon | 1:ac48b187213c | 40 | // int putc(int c) inherited from Stream |
| simon | 1:ac48b187213c | 41 | // int printf(...) inherited from Stream |
| simon | 1:ac48b187213c | 42 | void character(int column, int row, int c); |
| simon | 1:ac48b187213c | 43 | void locate(int column, int row); |
| simon | 1:ac48b187213c | 44 | void cls(); |
| simon | 1:ac48b187213c | 45 | |
| simon | 1:ac48b187213c | 46 | int rows(); |
| simon | 1:ac48b187213c | 47 | int columns(); |
| simon | 1:ac48b187213c | 48 | |
| simon | 1:ac48b187213c | 49 | |
| simon | 1:ac48b187213c | 50 | protected: |
| simon | 1:ac48b187213c | 51 | |
| simon | 1:ac48b187213c | 52 | // Stream implementation functions |
| simon | 1:ac48b187213c | 53 | virtual int _putc(int value); |
| simon | 1:ac48b187213c | 54 | virtual int _getc(); |
| simon | 1:ac48b187213c | 55 | |
| simon | 1:ac48b187213c | 56 | // internal tx functions |
| simon | 1:ac48b187213c | 57 | void writeByte(int value); |
| simon | 1:ac48b187213c | 58 | void writeCommand(int command); |
| simon | 1:ac48b187213c | 59 | void writeData(int data); |
| simon | 1:ac48b187213c | 60 | int address(int column, int row); |
| simon | 1:ac48b187213c | 61 | |
| simon | 1:ac48b187213c | 62 | DigitalOut _rs, _e; |
| simon | 1:ac48b187213c | 63 | BusOut _d; |
| simon | 1:ac48b187213c | 64 | LCDType _type; |
| simon | 1:ac48b187213c | 65 | |
| simon | 1:ac48b187213c | 66 | // current row/column |
| simon | 1:ac48b187213c | 67 | int _column; |
| simon | 1:ac48b187213c | 68 | int _row; |
| simon | 1:ac48b187213c | 69 | }; |
| simon | 1:ac48b187213c | 70 | |
| simon | 1:ac48b187213c | 71 | #endif |