I2c Class Reference

#include <I2c.h>

Public Member Functions
	I2c (void)
unsigned char	readByte (void)
unsigned char	readByteWithoutAck (void)
void	sendStart (void)
void	sendStop (void)
void	writeByte (unsigned char _byte)

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Detailed Description

Definition at line 11 of file I2c.h.

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Constructor & Destructor Documentation

I2c::I2c

(

void

)

Definition at line 8 of file I2c.c.

References F_CPU, and TWI_CLK.

             {

  TWSR = 0x00;                            // prescale = 1
  TWBR = (unsigned char)(((double)((double)F_CPU / (double)TWI_CLK) - 16L) / 2L);  // 100kHz

}

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Member Function Documentation

unsigned char I2c::readByte

(

void

)

Definition at line 55 of file I2c.c.

Referenced by Ram::readBytes().

{

  TWCR = (1 << TWINT) | (1 << TWEN) | (1 << TWEA);     // 
  while(!(TWCR & (1<<TWINT)));                         // wait till ready
  return TWDR;                          // data is in TWDR

}

unsigned char I2c::readByteWithoutAck

(

void

)

Definition at line 67 of file I2c.c.

Referenced by Ram::readBytes().

{

  TWCR = (1 << TWINT) | (1 << TWEN);              // 
  while(!(TWCR & (1<<TWINT)));                         // wait till ready
  return TWDR;                          // data is in TWDR

}

void I2c::sendStart

(

void

)

Definition at line 19 of file I2c.c.

Referenced by Ram::readBytes(), and Ram::writeBytes().

{

  TWCR = (1 << TWINT) | (1 << TWSTA) | (1 << TWEN);    // start condition
  while(!(TWCR & (1<<TWINT)));                    // wait for acknowledge

}

void I2c::sendStop

(

void

)

Definition at line 31 of file I2c.c.

Referenced by Ram::readBytes(), and Ram::writeBytes().

{

  TWCR = (1 << TWINT) | (1 << TWSTO) | (1 << TWEN);    // stop condition =0;

}

void I2c::writeByte

(

unsigned char

_byte

)

Definition at line 42 of file I2c.c.

Referenced by Ram::readBytes(), and Ram::writeBytes().

{

  //TWDR = 0x90;                                  // Byte
  TWDR = _byte;                                   // Byte
  TWCR = (1 << TWINT) | (1 << TWEN);                   // send
  while(!(TWCR & (1<<TWINT)));                    // wait until ready

}

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The documentation for this class was generated from the following files:

• src/I2c.h
• src/I2c.c