STM32F051 IIC模組代碼

F051網上的資源比較少，下面是我調通的IIC模組代碼，實現的功能很簡單，讀一個byte和寫一個byte

void I2C1_Init(void)
{
    GPIO_InitTypeDef GPIO_InitStructure;    
    I2C_InitTypeDef   I2C_InitStructure;    
    
    RCC_I2CCLKConfig(RCC_I2C1CLK_HSI);//HSI 8MHz
    
    RCC_APB1PeriphClockCmd(RCC_APB1Periph_I2C1, ENABLE);
    RCC_AHBPeriphClockCmd(RCC_AHBPeriph_GPIOB, ENABLE);
    
    GPIO_PinAFConfig(GPIOB, GPIO_PinSource8, GPIO_AF_1);//SCL
    GPIO_PinAFConfig(GPIOB, GPIO_PinSource9, GPIO_AF_1);//SDA
    
    
    GPIO_InitStructure.GPIO_Pin = GPIO_Pin_8|GPIO_Pin_9;
    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF; 
    GPIO_InitStructure.GPIO_OType = GPIO_OType_OD;
    GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
    GPIO_Init(GPIOB, &GPIO_InitStructure);
    GPIO_SetBits(GPIOB,GPIO_Pin_8|GPIO_Pin_9);   

    I2C_DeInit(I2C1);
    I2C_InitStructure.I2C_Mode = I2C_Mode_I2C;
    I2C_InitStructure.I2C_AnalogFilter = I2C_AnalogFilter_Enable;
    I2C_InitStructure.I2C_DigitalFilter = 0x00;
    I2C_InitStructure.I2C_OwnAddress1 = 0x00;
    I2C_InitStructure.I2C_Ack = I2C_Ack_Enable;
    I2C_InitStructure.I2C_AcknowledgedAddress = I2C_AcknowledgedAddress_7bit;
    I2C_InitStructure.I2C_Timing = sEE_I2C_TIMING;  //去ST下載計算工具http://www.en.stmicroelectronics.com.cn/web/cn/catalog/tools/PF257930
    
    I2C_Init(I2C1, &I2C_InitStructure);
}

u8 Si3452_ReadOneByte(uint16_t deviceAddr, uint8_t ReadAddr)
{    
    u8 temp=0;    
    I2C_NumberOfBytesConfig(I2C1, 1);
    I2C_SlaveAddressConfig(I2C1, deviceAddr);
    I2C_MasterRequestConfig(I2C1, I2C_Direction_Transmitter);
    I2C_GenerateSTART(I2C1, ENABLE);                              
    I2C_SendData(I2C1, ReadAddr);               
    while(!I2C_GetFlagStatus(I2C1, I2C_FLAG_TXE));
    
    I2C_MasterRequestConfig(I2C1, I2C_Direction_Receiver);
    I2C_GenerateSTART(I2C1, ENABLE);                                
    while(!I2C_GetFlagStatus(I2C1, I2C_FLAG_RXNE));
    temp=I2C_ReceiveData(I2C1);
    I2C_GenerateSTOP(I2C1, ENABLE);                                  
    return temp;
}

void Si3452_WriteOneByte(uint16_t deviceAddr, u8 WriteAddr, u8 DataToWrite)
{    
    I2C_NumberOfBytesConfig(I2C1, 2);
    I2C_SlaveAddressConfig(I2C1, deviceAddr);
    I2C_MasterRequestConfig(I2C1, I2C_Direction_Transmitter);
    I2C_GenerateSTART(I2C1, ENABLE);                            
    I2C_SendData(I2C1, WriteAddr);               
    while(!I2C_GetFlagStatus(I2C1, I2C_FLAG_TXE));
    I2C_SendData(I2C1, DataToWrite);                                         
    while(!I2C_GetFlagStatus(I2C1, I2C_FLAG_TXE));
    I2C_GenerateSTOP(I2C1, ENABLE);                                  
}