[AT32F403/403A] 能否帮忙看下i2c初始化这里是否正确

void I2Cx_Init(I2C_Type* I2Cx)

{ 

                GPIO_InitType GPIO_InitStructure;

                NVIC_InitType NVIC_InitStructure;  

                I2C_InitType  I2C_InitStructure;



                /* I2C_SCL_GPIO_CLK and I2C_SDA_GPIO_CLK Periph clock enable */

                RCC_APB2PeriphClockCmd(I2C_SCL_GPIO_CLK | I2C_SDA_GPIO_CLK, ENABLE);



                /* I2C Periph clock enable */

                RCC_APB1PeriphClockCmd(I2C_CLK, ENABLE);



                /* Enable the DMA clock */

                RCC_AHBPeriphClockCmd(I2Cx_DMA_CLK, ENABLE);

                        

                /* GPIO configuration */  

                /* Configure I2C pins: SCL */

                GPIO_InitStructure.GPIO_Pins = I2C_SCL_PIN;

                GPIO_InitStructure.GPIO_MaxSpeed = GPIO_MaxSpeed_50MHz;

                GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_OD;

                GPIO_Init(I2C_SCL_GPIO_PORT, &GPIO_InitStructure);



                /* Configure I2C pins: SDA */

                GPIO_InitStructure.GPIO_Pins = I2C_SDA_PIN;

                GPIO_Init(I2C_SDA_GPIO_PORT, &GPIO_InitStructure); 



                /* Configure and enable I2C DMA TX Channel interrupt */

                NVIC_InitStructure.NVIC_IRQChannel = I2Cx_DMA_TX_IRQn;

                NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = I2Cx_DMA_TX_PREPRIO;

                NVIC_InitStructure.NVIC_IRQChannelSubPriority = I2Cx_DMA_TX_SUBPRIO;

                NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;

                NVIC_Init(&NVIC_InitStructure);



                /* Configure and enable I2C DMA RX Channel interrupt */

                NVIC_InitStructure.NVIC_IRQChannel = I2Cx_DMA_RX_IRQn;

                NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = I2Cx_DMA_RX_PREPRIO;

                NVIC_InitStructure.NVIC_IRQChannelSubPriority = I2Cx_DMA_RX_SUBPRIO;

                NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;

                NVIC_Init(&NVIC_InitStructure);  



                NVIC_InitStructure.NVIC_IRQChannel = I2Cx_EV_IRQn;

                NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = I2Cx_EV_PREPRIO;

                NVIC_InitStructure.NVIC_IRQChannelSubPriority = I2Cx_EV_SUBPRIO;

                NVIC_Init(&NVIC_InitStructure);



                NVIC_InitStructure.NVIC_IRQChannel = I2Cx_ER_IRQn;

                NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = I2Cx_ER_PREPRIO;

                NVIC_InitStructure.NVIC_IRQChannelSubPriority = I2Cx_ER_SUBPRIO;

                NVIC_Init(&NVIC_InitStructure);

                

                /* I2C configuration */

                I2C_InitStructure.I2C_Mode = I2C_Mode_I2CDevice;

                I2C_InitStructure.I2C_FmDutyCycle = I2C_FmDutyCycle_2_1;

                I2C_InitStructure.I2C_OwnAddr1 = I2C_OWN_ADDRESS7;

                I2C_InitStructure.I2C_Ack = I2C_Ack_Enable;

                I2C_InitStructure.I2C_AddrMode = I2C_AddrMode_7bit;

                I2C_InitStructure.I2C_BitRate = I2C_SPEED;

                /* Apply I2C configuration after enabling it */

                I2C_Init(I2Cx, &I2C_InitStructure);



                /* I2C Peripheral Enable */

                I2C_Cmd(I2Cx, ENABLE);



                I2C_INTConfig(I2Cx,I2C_INT_EVT | I2C_INT_BUF | I2C_INT_ERR,ENABLE);

}