PCF8591 library
See https://developer.mbed.org/users/yasuyuki/notebook/PCF8591/
Diff: PCF8591.cpp
- Revision:
- 0:e17d7079ee96
diff -r 000000000000 -r e17d7079ee96 PCF8591.cpp --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/PCF8591.cpp Sat Oct 04 12:03:47 2014 +0000 @@ -0,0 +1,36 @@ +//********************** +// PCF8591.cpp for mbed +// +// PCF8591 lcd(P0_5,P0_4); +// or +// I2C i2c(P0_5,P0_4); +// PCF8591 lcd(i2c); +// +// (C)Copyright 2014 All rights reserved by Y.Onodera +// http://einstlab.web.fc2.com +//********************** + +#include "mbed.h" +#include "PCF8591.h" + +PCF8591::PCF8591 (PinName sda, PinName scl) : _i2c(sda, scl) { +} +PCF8591::PCF8591 (I2C& p_i2c) : _i2c(p_i2c) { +} + +void PCF8591::put(unsigned char a, unsigned char b) +{ + buf[0]=a; + buf[1]=b; + _i2c.write(PCF8591_ADDR, buf, 2); +} + +unsigned char PCF8591::get(unsigned char a) +{ + buf[0] = a; + _i2c.write(PCF8591_ADDR, buf, 1, true); // no stop, repeated + _i2c.read( PCF8591_ADDR, buf, 1); + return buf[0]; +} + +