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extern void i2c_init (void); // I2C initialisieren
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extern void i2c_init (void); // I2C initialisieren
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extern void i2c_write_byte (char byte); // 1 Byte schreiben
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extern void i2c_write_byte (char byte); // 1 Byte schreiben
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extern void i2c_reset(void);
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extern void i2c_reset(void);
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extern void I2C_SendBLConfig(void);
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extern void I2C_SendBLConfig(void);
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#define I2C_Start()  {TWCR = (1<<TWSTA) | (1<<TWEN) | (1<<TWINT) | (1<<TWIE);}
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#define I2C_Start() {BLFlags &= ~BLFLAG_TX_COMPLETE; TWCR = (1<<TWSTA) | (1<<TWEN) | (1<<TWINT) | (1<<TWIE);}
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#define I2C_Stop() {TWCR = (1<<TWEN) | (1<<TWSTO) | (1<<TWINT);}
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#define I2C_Stop() {TWCR = (1<<TWEN) | (1<<TWSTO) | (1<<TWINT);}
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#define I2C_ReceiveByte() {TWCR = (1<<TWINT) | (1<<TWEN) | (1<<TWIE) | (1<<TWEA);}
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#define I2C_ReceiveByte() {TWCR = (1<<TWINT) | (1<<TWEN) | (1<<TWIE) | (1<<TWEA);}
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#define I2C_ReceiveLastByte() {TWCR = (1<<TWINT) | (1<<TWEN) | (1<<TWIE);}
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#define I2C_ReceiveLastByte() {TWCR = (1<<TWINT) | (1<<TWEN) | (1<<TWIE);}