Developing Library for the MAX7314 I2C 16-bit I/O Expander w/ PWM
Dependencies: mbed PCA9538_Expander
Diff: PCF8575.cpp
- Revision:
- 0:7e32b01354d3
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/PCF8575.cpp Wed Apr 13 23:17:22 2011 +0000 @@ -0,0 +1,42 @@ +/* mbed PCF8574 Library, for driving the I2C I/O Expander + * Copyright (c) 2008-2010, cstyles, sford (Originally PCF8574 lib) + * new created by Lerche + * 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. + */ + +#include "PCF8575.h" +#include "mbed.h" + +PCF8575::PCF8575(PinName sda, PinName scl, int address) + : _i2c(sda, scl) { + _address = address; +} + +int PCF8575::read() { + char foo[2]; + _i2c.read(_address, foo, 2); + return (foo[0] << 8) | foo[1]; +} + +void PCF8575::write(int data) { + char foo[2]; + foo[0]=data; + foo[1]=data>>8; + _i2c.write(_address, foo, 2); +}