Hendrik Lipka / LcdWindow

Display text on LCD displays (even on multiple ones). Allow to create windows (frames) on display, and to combine them (split, add, duplicate, scroll). See http://mbed.org/users/hlipka/notebook/lcdwindow/ for more information.

Dependents:   Mbell

hd44780_8bit.h@9:2fe93daa2106, 2011-02-22 (annotated)

Committer:
hlipka
Date:
Tue Feb 22 22:57:44 2011 +0000
Revision:
9:2fe93daa2106
Parent:
2:5ac5bab7daaf 
fixed semaphore handling - should now be really thread safe (can be called from interrupts)

Who changed what in which revision?

UserRevisionLine numberNew contents of line
hlipka 0:ae5037e3d6e0 1 /*
hlipka 0:ae5037e3d6e0 2 * mbed LCDWindow library
hlipka 0:ae5037e3d6e0 3 * Copyright (c) 2010 Hendrik Lipka
hlipka 0:ae5037e3d6e0 4 *
hlipka 0:ae5037e3d6e0 5 * Permission is hereby granted, free of charge, to any person obtaining a copy
hlipka 0:ae5037e3d6e0 6 * of this software and associated documentation files (the "Software"), to deal
hlipka 0:ae5037e3d6e0 7 * in the Software without restriction, including without limitation the rights
hlipka 0:ae5037e3d6e0 8 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
hlipka 0:ae5037e3d6e0 9 * copies of the Software, and to permit persons to whom the Software is
hlipka 0:ae5037e3d6e0 10 * furnished to do so, subject to the following conditions:
hlipka 0:ae5037e3d6e0 11 *
hlipka 0:ae5037e3d6e0 12 * The above copyright notice and this permission notice shall be included in
hlipka 0:ae5037e3d6e0 13 * all copies or substantial portions of the Software.
hlipka 0:ae5037e3d6e0 14 *
hlipka 0:ae5037e3d6e0 15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
hlipka 0:ae5037e3d6e0 16 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
hlipka 0:ae5037e3d6e0 17 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
hlipka 0:ae5037e3d6e0 18 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
hlipka 0:ae5037e3d6e0 19 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
hlipka 0:ae5037e3d6e0 20 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
hlipka 0:ae5037e3d6e0 21 * THE SOFTWARE.
hlipka 0:ae5037e3d6e0 22 */
hlipka 0:ae5037e3d6e0 23
hlipka 0:ae5037e3d6e0 24 #ifndef HD44780_8BIT_H_
hlipka 0:ae5037e3d6e0 25 #define HD44780_8BIT_H_
hlipka 0:ae5037e3d6e0 26
hlipka 0:ae5037e3d6e0 27 #include "lcd.h"
hlipka 0:ae5037e3d6e0 28
hlipka 0:ae5037e3d6e0 29 #include "BusOut.h"
hlipka 0:ae5037e3d6e0 30 #include "DigitalOut.h"
hlipka 0:ae5037e3d6e0 31
hlipka 0:ae5037e3d6e0 32 using namespace mbed;
hlipka 0:ae5037e3d6e0 33
hlipka 0:ae5037e3d6e0 34 /**
hlipka 0:ae5037e3d6e0 35 * class for connecting HD44780-based LCD-Display (or using similiar controllers)
hlipka 0:ae5037e3d6e0 36 * displays are connected in 8bit-mode
hlipka 0:ae5037e3d6e0 37 * currently only 1 or 2 lines are supported
hlipka 0:ae5037e3d6e0 38 */
hlipka 0:ae5037e3d6e0 39 class HD44780LCD8bit: public TextLCDBase
hlipka 0:ae5037e3d6e0 40 {
hlipka 0:ae5037e3d6e0 41 public:
hlipka 0:ae5037e3d6e0 42 /**
hlipka 0:ae5037e3d6e0 43 * @param width number of chars per line
hlipka 0:ae5037e3d6e0 44 * @param height number of lines (currently only 1 and 2 work)
hlipka 0:ae5037e3d6e0 45 * @param data the bus object used for sending data (must be 8bit)
hlipka 0:ae5037e3d6e0 46 * @param enable the pin name for the enable line (1=active)
hlipka 0:ae5037e3d6e0 47 * @param rs the pin name for the register select line (0=cmd, 1=data)
hlipka 0:ae5037e3d6e0 48 */
hlipka 2:5ac5bab7daaf 49 HD44780LCD8bit(unsigned int columns, unsigned int rows, BusOut *data, PinName enable, PinName rs);
hlipka 0:ae5037e3d6e0 50 virtual void init();
hlipka 2:5ac5bab7daaf 51 virtual void writeText(const unsigned int column, const unsigned int row, const char text[]);
hlipka 0:ae5037e3d6e0 52 virtual void clear();
hlipka 2:5ac5bab7daaf 53 virtual void character(int column, int row, int c);
hlipka 0:ae5037e3d6e0 54
hlipka 0:ae5037e3d6e0 55 protected:
hlipka 1:65f72ed914fa 56 void sendCmd(const unsigned char byte);
hlipka 1:65f72ed914fa 57 void sendData(const unsigned char byte);
hlipka 0:ae5037e3d6e0 58
hlipka 1:65f72ed914fa 59 void sendByte(const unsigned char byte);
hlipka 0:ae5037e3d6e0 60
hlipka 0:ae5037e3d6e0 61 BusOut* _data;
hlipka 0:ae5037e3d6e0 62 DigitalOut *_enable, *_rs;
hlipka 0:ae5037e3d6e0 63 };
hlipka 0:ae5037e3d6e0 64 #endif