PCF8591 library
See https://developer.mbed.org/users/yasuyuki/notebook/PCF8591/
Revision 0:e17d7079ee96, committed 2014-10-04
- Comitter:
- yasuyuki
- Date:
- Sat Oct 04 12:03:47 2014 +0000
- Commit message:
- first release
Changed in this revision
PCF8591.cpp | Show annotated file Show diff for this revision Revisions of this file |
PCF8591.h | Show annotated file Show diff for this revision Revisions of this file |
--- /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]; +} + +
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/PCF8591.h Sat Oct 04 12:03:47 2014 +0000 @@ -0,0 +1,31 @@ +//********************** +// PCF8591.h for mbed +// +// (C)Copyright 2014 All rights reserved by Y.Onodera +// http://einstlab.web.fc2.com +//********************** + +#ifndef PCF8591_H_ +#define PCF8591_H_ + +#define PCF8591_ADDR 0x92 + +#include "mbed.h" + +class PCF8591{ +public: + PCF8591 (PinName sda, PinName scl); + PCF8591 (I2C& p_i2c); + + void put(unsigned char a, unsigned char b); + unsigned char get(unsigned char a); + +protected: + + I2C _i2c; + char buf[2]; + +}; + + +#endif /* PCF8591_H_ */