Sakura IoT Platform b
Fork of SakuraIO by
SakuraIO_I2C.cpp
- Committer:
- sakurafan
- Date:
- 2016-11-21
- Revision:
- 4:85955eb2e61a
- Parent:
- 1:20e1dfe45dab
- Child:
- 3:c54a1eba22c4
File content as of revision 4:85955eb2e61a:
#include "mbed.h" #include "SakuraIO.h" #include "debug.h" #define SAKURAIO_SLAVE_ADDR 0x4F #define MODE_IDLE 0x00 #define MODE_WRITE 0x01 #define MODE_READ 0x02 void SakuraIO_I2C::begin(){ mode = MODE_IDLE; } void SakuraIO_I2C::end(){ switch(mode){ case MODE_WRITE: i2c.stop(); break; case MODE_READ: while (_length > 0) { _length --; i2c.read(_length > 0 ? 1 : 0); } i2c.stop(); break; } mode = MODE_IDLE; } void SakuraIO_I2C::sendByte(uint8_t data){ if(mode != MODE_WRITE){ dbg("beginTr\r\n"); i2c.start(); i2c.write(SAKURAIO_SLAVE_ADDR<<1); mode = MODE_WRITE; } dbg("Write=%02x\r\n", data); i2c.write(data); } uint8_t SakuraIO_I2C::startReceive(uint8_t length){ if(mode != MODE_IDLE){ dbg("endTransmission\r\n"); i2c.stop(); } dbg("requestForm=%d\r\n", length); _length = length; i2c.start(); i2c.write(SAKURAIO_SLAVE_ADDR<<1 | 1); mode = MODE_READ; return 0; } uint8_t SakuraIO_I2C::receiveByte(){ return receiveByte(false); } uint8_t SakuraIO_I2C::receiveByte(bool stop){ uint8_t ret = 0; if (_length > 0) { _length --; ret = i2c.read(_length > 0 ? 1 : 0); } if(stop){ end(); } dbg("Read=%d\r\n", ret); return ret; } SakuraIO_I2C::SakuraIO_I2C (I2C &_i2c) : i2c(_i2c) { mode = MODE_IDLE; } SakuraIO_I2C::SakuraIO_I2C (PinName sda, PinName scl) : i2c(sda, scl) { mode = MODE_IDLE; }