//--------------------------------------------------------------------------------------------------------------------
void TWI_TransmitData(unsigned char data)
{
TWDR = data;
TWCR = (1 << TWINT)|(1 << TWEN);
while (!(TWCR & (1<<TWINT)));
if(TWI_STATUS != TWI_MT_DATA_ACK){TWI_ERROR();}
}
uint8_t TWI_ReadByte_ACK()
{
TWCR = (1<<TWINT) | (1<<TWEN) | (1<<TWEA);
while (!(TWCR & (1<<TWINT)));
if (TW_STATUS != TW_MR_DATA_ACK) TWI_ERROR(I2C_NACK_ERROR);
return TWDR;
}
//--------------------------------------------------------------------------------------------------------------------
void TWI_SendSLAR(unsigned char addr)
{
TWDR = (addr << 1) + 1;
TWCR = (1 << TWINT)|(1 << TWEN);
while (!(TWCR & (1<<TWINT)));
if(TWI_STATUS != TWI_MR_SLA_ACK){TWI_ERROR();}
}
void TWI_WriteByte(uint8_t byte)
{
TWDR = byte;
TWCR = (1<<TWINT) | (1<<TWEN);
while (!(TWCR & (1<<TWINT)));
if(TW_STATUS != TW_MT_DATA_ACK)
TWI_ERROR(I2C_NACK_ERROR);
}
//--------------------------------------------------------------------------------------------------------------------
unsigned char TWI_ReceiveData(void)
{
unsigned char data;
TWCR = (1 << TWINT)|(1 << TWEN)|(1 << TWEA);
while (!(TWCR & (1<<TWINT)));
if(TWI_STATUS != TWI_MR_DATA_ACK){TWI_ERROR();}
data = TWDR;
return data;
}
/* extra use */
char TWI_Write(char address, char *data, char n)
{
unsigned int SLA_W = (address<<1) & 0XFE;
char chk;
chk=TWI_Start();
if(chk==1)
return chk;
//---------------------------
TWDR = SLA_W;
TWCR = (1<<TWINT)|(1<<TWEN);
while (!(TWCR & (1<<TWINT)));
if (TWI_STATUS != TWI_MT_SLA_ACK)
{
TWI_ERROR();
return 3;
}
//---------------------------
for(char i=0;i<n;i++)
{
TWDR = *(data+i);
TWCR = (1<<TWINT)|(1<<TWEN);
while (!(TWCR & (1<<TWINT)));
if (TWI_STATUS != TWI_MT_DATA_ACK)
{
TWI_ERROR();
return 4;
}
}
if(n>1)
{
TWI_Stop();
}
else
write_to_read=1;
return 0;
}
void TWI_RStart() {
TWCR = (1<<TWINT) | (1<<TWSTA) | (1<<TWEN);
//Wait for TWINT Flag set. This indicates that the START condition
//has been transmitted
while (!(TWCR & (1<<TWINT)));
if ((TWSR & 0xF8) != TW_REP_START) {
TWI_ERROR(I2C_REP_START_ERROR);
//return I2C_START_ERROR;
}
//return 0;
}
void TWI_Start() //Dodac zwracanie statusu wszedzie!
{
TWCR = (1<<TWINT) | (1<<TWSTA) | (1<<TWEN);
//Wait for TWINT Flag set. This indicates that the START condition
//has been transmitted
TWI_WaitForFlag();
if ((TWSR & 0xF8) != TW_START) {
TWI_ERROR(I2C_START_ERROR);
//return I2C_START_ERROR;
}
//return 0;
}
//--------------------------------------------------------------------------------------------------------------------
char TWI_ReStart(void)
{
TWCR = (1<<TWINT)|(1<<TWSTA)|(1<<TWEN);
while (!(TWCR & (1<<TWINT)));
if (TWI_STATUS != TWI_REP_START)
{
TWI_ERROR();
return 2;
}
else
return 0;
}
void TWI_Write_SLA(uint8_t address)
{
uint8_t status;
if((address & 0x01) == 0) status = TW_MT_SLA_ACK;
else status = TW_MR_SLA_ACK;
TWDR = address;
TWCR = (1<<TWINT) | (1<<TWEN);
while (!(TWCR & (1<<TWINT))); //Czekaj na zakonczenie
if (TW_STATUS != status)
{
TWI_ERROR(I2C_ACK_ERROR); //NACK error
//return I2C_ACK_ERROR;
//Send_String(table2,2);
}
//return 0;
}
//--------------------------------------------------------------------------------------------------------------------
void TWI_SendNoAck(void)
{
TWCR = (1 << TWINT)|(1 << TWEN);
while (!(TWCR & (1<<TWINT)));
if(TWI_STATUS != TWI_MR_DATA_NACK){TWI_ERROR();}
}
char TWI_Read(char address, char *data, char n)
{
unsigned int SLA_R = (address<<1) | 0X01;
char chk;
if(write_to_read==1)
{
chk=TWI_ReStart();
if(chk==2)
return chk;
write_to_read=0;
}
else
chk=TWI_Start();
if(chk==1)
return chk;
//---------------------------
TWDR = SLA_R;
TWCR = (1<<TWINT)|(1<<TWEN);
while (!(TWCR & (1<<TWINT)));
if (TWI_STATUS != TWI_MR_SLA_ACK)
{
TWI_ERROR();
return 5;
}
//---------------------------
if(n>1)
{
for(char i=0;i<(n-1);i++)
{
TWCR = (1<<TWINT)|(1<<TWEN)|(1<<TWEA);
while (!(TWCR & (1<<TWINT)));
if (TWI_STATUS != TWI_MR_DATA_ACK)
{
TWI_ERROR();
return 6;
}
*(data+i) = TWDR;
}
TWCR = (1<<TWINT)|(1<<TWEN);
while (!(TWCR & (1<<TWINT)));
if (TWI_STATUS != TWI_MR_DATA_NACK)
{
TWI_ERROR();
return 7;
}
*(data+(n-1)) = TWDR; //burst read �� data�̫��@���O�SACK��
}
else
{
TWCR = (1<<TWINT)|(1<<TWEN);
while (!(TWCR & (1<<TWINT)));
if (TWI_STATUS != TWI_MR_DATA_NACK) {
TWI_ERROR();
return 8;
}
*(data) = TWDR; //data�̫��@���O�SACK��
}
TWI_Stop();
return 0;
}
