/*******************************************************************************
* Function Name : I2C_ReadRegister
* Description : Reads the specified I2C register and returns its value.
* Input1 : - I2C_Register: specifies the register to read.
* This parameter can be one of the following values:
* - I2C_Register_CR1: CR1 register.
* - I2C_Register_CR2: CR2 register.
* - I2C_Register_OAR1: OAR1 register.
* - I2C_Register_OAR2: OAR2 register.
* - I2C_Register_DR: DR register.
* - I2C_Register_SR1: SR1 register.
* - I2C_Register_SR2: SR2 register.
* - I2C_Register_CCR: CCR register.
* - I2C_Register_TRISE: TRISE register.
* Output : None
* Return : The value of the read register.
*******************************************************************************/
u16 I2C_ReadRegister(I2C_TypeDef* I2Cx, u8 I2C_Register)
{
/* Check the parameters */
assert_param(IS_I2C_REGISTER(I2C_Register));
/* Return the selected register value */
return (*(u16 *)(*((u32 *)&I2Cx) + I2C_Register));
}
/**
* @brief Reads the specified I2C register and returns its value.
* @param I2C_Register: specifies the register to read.
* This parameter can be one of the following values:
* @arg I2C_Register_CR1: CR1 register.
* @arg I2C_Register_CR2: CR2 register.
* @arg I2C_Register_OAR1: OAR1 register.
* @arg I2C_Register_OAR2: OAR2 register.
* @arg I2C_Register_DR: DR register.
* @arg I2C_Register_SR1: SR1 register.
* @arg I2C_Register_SR2: SR2 register.
* @arg I2C_Register_CCR: CCR register.
* @arg I2C_Register_TRISE: TRISE register.
* @retval The value of the read register.
*/
uint16_t I2C_ReadRegister(I2C_TypeDef* I2Cx, uint8_t I2C_Register) {
__IO uint32_t tmp = 0;
/* Check the parameters */
assert_param(IS_I2C_ALL_PERIPH(I2Cx));
assert_param(IS_I2C_REGISTER(I2C_Register));
tmp = (uint32_t)I2Cx;
tmp += I2C_Register;
/* Return the selected register value */
return (*(__IO uint16_t*)tmp);
}
