i2c_base.cpp File Reference

#include <string.h>
#include "i2c_base.hpp"
#include "lpc_sys.h"

Include dependency graph for i2c_base.cpp:

Macros
#define	I2C_SET_READ_MODE(addr)   (addr |= 1)
	Set the LSB to indicate read-mode. More...
#define	I2C_SET_WRITE_MODE(addr)   (addr &= 0xFE)
	Reset the LSB to indicate write-mode. More...
#define	I2C_READ_MODE(addr)   (addr & 1)
	Read address is ODD. More...
#define	I2C_WRITE_ADDR(addr)   (addr & 0xFE)
	Write address is EVEN. More...
#define	I2C_READ_ADDR(addr)   (addr | 1)
	Read address is ODD. More...
#define	clearSIFlag()   mpI2CRegs->I2CONCLR = (1<<3)
#define	setSTARTFlag()   mpI2CRegs->I2CONSET = (1<<5)
#define	clearSTARTFlag()   mpI2CRegs->I2CONCLR = (1<<5)
#define	setAckFlag()   mpI2CRegs->I2CONSET = (1<<2)
#define	setNackFlag()   mpI2CRegs->I2CONCLR = (1<<2)
#define	setStop()

Macro Definition Documentation

#define clearSIFlag

(

)

mpI2CRegs->I2CONCLR = (1<<3)

#define clearSTARTFlag

(

)

mpI2CRegs->I2CONCLR = (1<<5)

#define I2C_READ_ADDR

(

addr

)

(addr | 1)

Read address is ODD.

#define I2C_READ_MODE

(

addr

)

(addr & 1)

Read address is ODD.

#define I2C_SET_READ_MODE

(

addr

)

(addr |= 1)

Set the LSB to indicate read-mode.

Instead of using a dedicated variable for read vs. write, we just use the LSB of the user address to indicate read or write mode.

#define I2C_SET_WRITE_MODE

(

addr

)

(addr &= 0xFE)

Reset the LSB to indicate write-mode.

#define I2C_WRITE_ADDR

(

addr

)

(addr & 0xFE)

Write address is EVEN.

#define setAckFlag

(

)

mpI2CRegs->I2CONSET = (1<<2)

#define setNackFlag

(

)

mpI2CRegs->I2CONCLR = (1<<2)

#define setSTARTFlag

(

)

mpI2CRegs->I2CONSET = (1<<5)

#define setStop

(

)

Value:

clearSTARTFlag();                           \
                                mpI2CRegs->I2CONSET = (1<<4);               \
                                clearSIFlag();                              \
                                while((mpI2CRegs->I2CONSET&(1<<4)));        \
                                if(I2C_READ_MODE(mTransaction.slaveAddr))   \
                                    state = readComplete;                   \
                                else                                        \
                                    state = writeComplete;