PCA9672.h

00001 /* mbed PCA9672 I2C I/O Expander Library
00002  * Copyright (c) 2013 viswesr
00003  *
00004  * MIT License
00005  *
00006  * Permission is hereby granted, free of charge, to any person obtaining a copy of this software 
00007  * and associated documentation files (the "Software"), to deal in the Software without restriction, 
00008  * including without limitation the rights to use, copy, modify, merge, publish, distribute, 
00009  * sublicense, and/or sell 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 all copies or 
00013  * substantial portions of the Software.
00014  *
00015  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING 
00016  * BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 
00017  * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, 
00018  * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, 
00019  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
00020  */
00021  
00022 #ifndef PCA9672_H
00023 #define PCA9672_H
00024  
00025 #include "mbed.h"
00026  
00027 //  PCA9672 IIC slave address
00028 #define  PCA9672_ADDR 0x46
00029  
00030 
00031 //!Library for the PCA9672 I/O expander.
00032 /*!
00033 The PCA9672 is an I2C I/O expander. It has 8 I/O pins.
00034 */
00035 class PCA9672
00036 {
00037 public:
00038   /*!
00039   Connect PCA9672 to I2C port pins sda and scl.
00040   */
00041   PCA9672 (PinName sda, PinName scl);
00042   
00043   /*!
00044   Set the frequency of the I2C interface.
00045   */
00046   void frequency (int hz);
00047 
00048   /*!
00049   Write the value to the IO Expander (pins XP0-XP7 output)
00050   */
00051   void write (char value);
00052   
00053   /*!
00054   Read the value of the IO Expander (pins XP0-XP7 input)
00055   */
00056   int read (void);
00057     
00058   /*!
00059   Destroys instance.
00060   */ 
00061   ~PCA9672 ();
00062   
00063 private:
00064   
00065   I2C _i2c;
00066  
00067 };
00068  
00069 #endif