83 lines
2.2 KiB
C++
83 lines
2.2 KiB
C++
/*
|
|
SoftwareI2C.h
|
|
2012 Copyright (c) Seeed Technology Inc. All right reserved.
|
|
|
|
Author:Loovee
|
|
2013-11-1
|
|
|
|
This is a Software I2C Library, can act as I2c master mode.
|
|
|
|
|
|
This library is free software; you can redistribute it and/or
|
|
modify it under the terms of the GNU Lesser General Public
|
|
License as published by the Free Software Foundation; either
|
|
version 2.1 of the License, or (at your option) any later version.
|
|
|
|
This library is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
Lesser General Public License for more details.
|
|
|
|
You should have received a copy of the GNU Lesser General Public
|
|
License along with this library; if not, write to the Free Software
|
|
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
|
|
*/
|
|
|
|
#ifndef _SOFTWAREI2C_H_
|
|
#define _SOFTWAREI2C_H_
|
|
|
|
#define GETACK 1 // get ack
|
|
#define GETNAK 0 // get nak
|
|
|
|
#ifndef HIGH
|
|
#define HIGH 1
|
|
#endif
|
|
#ifndef LOW
|
|
#define LOW 0
|
|
#endif
|
|
|
|
#ifndef uchar
|
|
#define uchar unsigned char
|
|
#endif
|
|
|
|
class SoftwareI2C {
|
|
private:
|
|
|
|
int pinSda;
|
|
int pinScl;
|
|
|
|
int recv_len;
|
|
|
|
int sda_in_out;
|
|
|
|
private:
|
|
|
|
inline void sdaSet(uchar ucDta);
|
|
inline void sclSet(uchar ucDta);
|
|
|
|
inline void sendStart(void);
|
|
inline void sendStop(void);
|
|
inline uchar getAck(void);
|
|
inline void sendByte(uchar ucDta);
|
|
inline uchar sendByteAck(uchar ucDta); // send byte and get ack
|
|
|
|
public:
|
|
|
|
//SoftwareI2C();
|
|
void begin(int Sda, int Scl);
|
|
uchar beginTransmission(uchar addr);
|
|
uchar endTransmission();
|
|
|
|
uchar write(uchar dta);
|
|
uchar write(uchar len, uchar* dta);
|
|
uchar requestFrom(uchar addr, uchar len);
|
|
uchar read();
|
|
uchar available() {
|
|
return recv_len;
|
|
}
|
|
};
|
|
|
|
#endif
|
|
/*********************************************************************************************************
|
|
END FILE
|
|
*********************************************************************************************************/
|