Library with address set to hardware pins
Dependents: Test2PCF8574 pcf8574-IO_expander
Diff: pcf8574.h
- Revision:
- 0:7913586369c2
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/pcf8574.h Sat Sep 08 22:11:31 2012 +0000 @@ -0,0 +1,47 @@ +/* +* PCF8574(A) Remote 8-bit I/O expander for I2C-bus +* Copyright (c) 2012 Bas van Drunen Littel +* +* Permission is hereby granted, free of charge, to any person obtaining a copy +* of this software and associated documentation files (the "Software"), to deal +* in the Software without restriction, including without limitation the rights +* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell +* copies of the Software, and to permit persons to whom the Software is +* furnished to do so, subject to the following conditions: +* +* The above copyright notice and this permission notice shall be included in +* all copies or substantial portions of the Software. +* +* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR +* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, +* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE +* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER +* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, +* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN +* THE SOFTWARE. +*/ + +#ifndef __PCF8574_H +#define __PCF8574_H + +#define VERSION 1.0 + +#include <mbed.h> + +#define PCF8574_I2C_ADDRESS 0x40 +#define PCF8574A_I2C_ADDRESS 0x70 +#define PCF8574_TYPE false +#define PCF8574A_TYPE true + +class PCF8574 { +public: + PCF8574(I2C* _interface, unsigned char _chipselect, bool _type); + ~PCF8574(void); + + unsigned char ReadByte(void); + void WriteByte(unsigned char byte); +private: + I2C* i2c; // Communication interface + unsigned char address; //I2C address +}; +#endif \ No newline at end of file