pcf8574.h

00001 /*
00002 * PCF8574(A) Remote 8-bit I/O expander for I2C-bus
00003 * Copyright (c) 2012 Bas van Drunen Littel
00004 *
00005 * Permission is hereby granted, free of charge, to any person obtaining a copy
00006 * of this software and associated documentation files (the "Software"), to deal
00007 * in the Software without restriction, including without limitation the rights
00008 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
00009 * copies of the Software, and to permit persons to whom the Software is
00010 * furnished to do so, subject to the following conditions:
00011 *
00012 * The above copyright notice and this permission notice shall be included in
00013 * all copies or substantial portions of the Software.
00014 *
00015 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
00016 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
00017 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
00018 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
00019 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
00020 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
00021 * THE SOFTWARE.
00022 */
00023 
00024 #ifndef __PCF8574_H
00025 #define __PCF8574_H
00026 
00027 #define VERSION 1.0
00028 
00029 #include <mbed.h>
00030 
00031 #define PCF8574_I2C_ADDRESS     0x40
00032 #define PCF8574A_I2C_ADDRESS    0x70
00033 #define PCF8574_TYPE            false
00034 #define PCF8574A_TYPE           true
00035 
00036 class PCF8574 {
00037 public:
00038     PCF8574(I2C* _interface, unsigned char _chipselect, bool _type);
00039     ~PCF8574(void);
00040     
00041     unsigned char ReadByte(void);
00042     void WriteByte(unsigned char byte);
00043 private:
00044     I2C* i2c; // Communication interface
00045     unsigned char address; //I2C address
00046 };
00047 #endif