unsigned char I2C_ReadBit_Wait()
{
SDAINPUT;
I2C_CLOCK_HI();
unsigned int i = 0;
unsigned char c = READSDA;
while(c>0 && i<=35)
{
I2CDELAY(1);
c = READSDA;
i++;
}
if(c)
I2C_DATA_HI();
else
I2C_DATA_LO();
SDAOUTPUT;
I2CDELAY(1);
I2C_CLOCK_LO();
I2CDELAY(1);
return c?0:1; // return true on ACK (0)
}
// Take control of the bus
void I2C_Take()
{
I2C_CLOCK_HI();
I2C_DATA_HI();
SCLOUTPUT;
SDAOUTPUT;
}
// Send a STOP Condition
//
void I2C_Stop(void)
{
I2C_CLOCK_HI();
_delay_us(I2C_DELAY);
I2C_DATA_HI();
_delay_us(I2C_DELAY);
}
// Send a STOP Condition
//
void i2c_stop(void)
{
I2C_CLOCK_HI();
_delay_us(i2cbitdelay);
I2C_DATA_HI();
_delay_us(i2cbitdelay);
}
// Send a STOP Condition
//
void I2C_Stop()
{
I2C_CLOCK_HI();
_delay_ms(1);
I2C_DATA_HI();
_delay_ms(1);
}
// Inits bitbanging port, must be called before using the functions below
//
void I2C_Init(void)
{
I2C_PORT &= ~ ((1 << I2C_DAT) | (1 << I2C_CLK));
I2C_CLOCK_HI();
I2C_DATA_HI();
_delay_us(I2C_DELAY);
}
void I2C_Init()
{
I2C_PORT &= ~( ( 1 << I2C_DAT ) | ( 1 << I2C_CLK ) );
I2C_CLOCK_HI();
I2C_DATA_HI();
I2C_DELAY();
}
// Inits bitbanging port, must be called before using the functions below
//
void i2c_init(void)
{
I2C_PORT &=~ (_BV( I2C_DAT ) | _BV( I2C_CLK ));
I2C_CLOCK_HI();
I2C_DATA_HI();
_delay_us(i2cbitdelay);
}
void I2C_Init()
{
// I2C_PORT &= ~( ( 1 << I2C_DAT ) | ( 1 << I2C_CLK ) );
digitalWrite(C,0,LOW);
digitalWrite(C,1,LOW);
I2C_CLOCK_HI();
I2C_DATA_HI();
I2C_DELAY();
}
void I2C_Stop()
{
I2C_DATA_LO();
I2C_CLOCK_LO();
I2C_DELAY();
I2C_CLOCK_HI();
I2C_DELAY();
I2C_DATA_HI();
I2C_DELAY();
}
// Inits bitbanging port, must be called before using the functions below
//
void I2C_Init()
{
/* Drive pins low only */
I2C_PORT &= ~( ( 1 << I2C_DAT ) | ( 1 << I2C_CLK ) );
/* Tri-state pins to pull up high */
I2C_CLOCK_HI();
I2C_DATA_HI();
_delay_ms(1);
}
//! Send a STOP Condition
void I2C_Stop()
{
I2C_DATA_LO();
I2CDELAY(3);
I2C_CLOCK_HI();
I2CDELAY(3);
I2C_DATA_HI();
I2CDELAY(1);
I2C_Release();
}
unsigned char i2c_readbit(void)
{
I2C_DATA_HI();
I2C_CLOCK_HI();
_delay_us(i2cbitdelay);
unsigned char c = I2C_PIN;
I2C_CLOCK_LO();
_delay_us(i2cbitdelay);
return ( c >> I2C_DAT ) & 1;
}
//! Write an I2C bit.
void I2C_WriteBit( unsigned char c )
{
if(c>0)
I2C_DATA_HI();
else
I2C_DATA_LO();
I2C_CLOCK_HI();
I2CDELAY(1);
I2C_CLOCK_LO();
I2CDELAY(1);
}
void I2C_Start()
{
// set both to high at the same time
// I2C_DDR &= ~( ( 1 << I2C_DAT ) | ( 1 << I2C_CLK ) );
I2C_CLOCK_HI();
I2C_DATA_HI();
I2C_DELAY();
I2C_DATA_LO();
I2C_DELAY();
I2C_CLOCK_LO();
I2C_DELAY();
}
unsigned char I2C_ReadBit()
{
I2C_DATA_HI();
I2C_CLOCK_HI();
I2C_DELAY();
unsigned char c = digitalRead(C,0);
I2C_CLOCK_LO();
I2C_DELAY();
return c;
}
unsigned char I2C_ReadBit()
{
I2C_DATA_HI();
I2C_CLOCK_HI();
_delay_ms(1);
unsigned char c = I2C_PIN;
I2C_CLOCK_LO();
_delay_ms(1);
return ( c >> I2C_DAT ) & 1;
}
//! Read an I2C bit.
unsigned char I2C_ReadBit()
{
SDAINPUT;
I2C_CLOCK_HI();
unsigned char c = READSDA;
if(c)
I2C_DATA_HI();
else
I2C_DATA_LO();
SDAOUTPUT;
I2CDELAY(1);
I2C_CLOCK_LO();
I2CDELAY(1);
return c;
}
void i2c_writebit( unsigned char c )
{
if ( c > 0 ) {
I2C_DATA_HI();
} else {
I2C_DATA_LO();
}
I2C_CLOCK_HI();
_delay_us(i2cbitdelay);
I2C_CLOCK_LO();
_delay_us(i2cbitdelay);
if ( c > 0 ) {
I2C_DATA_LO();
}
_delay_us(i2cbitdelay);
}
void I2C_WriteBit( unsigned char c )
{
if ( c > 0 ){
I2C_DATA_HI();
}
else {
I2C_DATA_LO();
}
I2C_CLOCK_HI();
_delay_ms(1);
I2C_CLOCK_LO();
_delay_ms(1);
if ( c > 0 )
I2C_DATA_LO();
_delay_ms(1);
}
void I2C_WriteBit( unsigned char c )
{
if ( c > 0 )
{
I2C_DATA_HI();
}
else
{
I2C_DATA_LO();
}
I2C_CLOCK_HI();
I2C_DELAY();
I2C_CLOCK_LO();
I2C_DELAY();
if ( c > 0 )
{
I2C_DATA_LO();
}
}