(((REGISTER) == I2C_Register_CR1) || \
((REGISTER) == I2C_Register_CR2) || \
((REGISTER) == I2C_Register_OAR1) || \
((REGISTER) == I2C_Register_OAR2) || \
((REGISTER) == I2C_Register_TIMINGR) || \
((REGISTER) == I2C_Register_TIMEOUTR) || \
((REGISTER) == I2C_Register_ISR) || \
((REGISTER) == I2C_Register_ICR) || \
((REGISTER) == I2C_Register_PECR) || \
((REGISTER) == I2C_Register_RXDR) || \
((REGISTER) == I2C_Register_TXDR))