LSM303DLHC应用解析单片机程序-----STM32F303

以STM32F303程序为例
staticvoidLSM303DLHC_LowLevel_Init(void)
{
GPIO_InitTypeDefGPIO_InitStructure;
EXTI_InitTypeDefEXTI_InitStructure;
I2C_InitTypeDefI2C_InitStructure;

RCC_APB1PeriphClockCmd(LSM303DLHC_I2C_CLK,ENABLE);

RCC_AHBPeriphClockCmd(LSM303DLHC_I2C_SCK_GPIO_CLK|LSM303DLHC_I2C_SDA_GPIO_CLK,ENABLE);

RCC_AHBPeriphClockCmd(LSM303DLHC_I2C_INT1_GPIO_CLK,ENABLE);

RCC_AHBPeriphClockCmd(LSM303DLHC_I2C_INT2_GPIO_CLK,ENABLE);

RCC_AHBPeriphClockCmd(LSM303DLHC_DRDY_GPIO_CLK,ENABLE);
GPIO_PinAFConfig(LSM303DLHC_I2C_SCK_GPIO_PORT,LSM303DLHC_I2C_SCK_SOURCE,LSM303DLHC_I2C_SCK_AF);
GPIO_PinAFConfig(LSM303DLHC_I2C_SDA_GPIO_PORT,LSM303DLHC_I2C_SDA_SOURCE,LSM303DLHC_I2C_SDA_AF);
GPIO_InitStructure.GPIO_Mode=GPIO_Mode_AF;
GPIO_InitStructure.GPIO_OType=GPIO_OType_PP;
GPIO_InitStructure.GPIO_PuPd=GPIO_PuPd_DOWN;
GPIO_InitStructure.GPIO_Speed=GPIO_Speed_50MHz;

GPIO_InitStructure.GPIO_Pin=LSM303DLHC_I2C_SCK_PIN;
GPIO_Init(LSM303DLHC_I2C_SCK_GPIO_PORT,&GPIO_InitStructure);

GPIO_InitStructure.GPIO_Pin=LSM303DLHC_I2C_SDA_PIN;
GPIO_Init(LSM303DLHC_I2C_SDA_GPIO_PORT,&GPIO_InitStructure);

GPIO_InitStructure.GPIO_Mode=GPIO_Mode_IN;
GPIO_InitStructure.GPIO_OType=GPIO_OType_PP;
GPIO_InitStructure.GPIO_PuPd=GPIO_PuPd_NOPULL;
GPIO_InitStructure.GPIO_Speed=GPIO_Speed_50MHz;

GPIO_InitStructure.GPIO_Pin=LSM303DLHC_DRDY_PIN;
GPIO_Init(LSM303DLHC_DRDY_GPIO_PORT,&GPIO_InitStructure);

SYSCFG_EXTILineConfig(LSM303DLHC_DRDY_EXTI_PORT_SOURCE,LSM303DLHC_DRDY_EXTI_PIN_SOURCE);

EXTI_InitStructure.EXTI_Line=LSM303DLHC_DRDY_EXTI_LINE;
EXTI_InitStructure.EXTI_Mode=EXTI_Mode_Interrupt;
EXTI_InitStructure.EXTI_Trigger=EXTI_Trigger_Rising;
EXTI_InitStructure.EXTI_LineCmd=ENABLE;

EXTI_Init(&EXTI_InitStructure);

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=0x00902025;

I2C_Init(LSM303DLHC_I2C,&I2C_InitStructure);

I2C_Cmd(LSM303DLHC_I2C,ENABLE);

GPIO_InitStructure.GPIO_Pin=LSM303DLHC_I2C_INT1_PIN;
GPIO_InitStructure.GPIO_Mode=GPIO_Mode_IN;
GPIO_InitStructure.GPIO_OType=GPIO_OType_PP;
GPIO_InitStructure.GPIO_Speed=GPIO_Speed_50MHz;
GPIO_InitStructure.GPIO_PuPd=GPIO_PuPd_NOPULL;
GPIO_Init(LSM303DLHC_I2C_INT1_GPIO_PORT,&GPIO_InitStructure);

GPIO_InitStructure.GPIO_Pin=LSM303DLHC_I2C_INT2_PIN;
GPIO_Init(LSM303DLHC_I2C_INT2_GPIO_PORT,&GPIO_InitStructure);
}
2.LSM303DLHC芯片初始化MAG(磁力)寄存器函数
给地址寄存器写值及功能参见LSM303DLHC数据手册
voidLSM303DLHC_MagInit(LSM303DLHCMag_InitTypeDef*LSM303DLHC_InitStruct)
{
uint8_tcra_regm=0x00,crb_regm=0x00,mr_regm=0x00;

LSM303DLHC_InitStructure.Temperature_Sensor=LSM303DLHC_TEMPSENSOR_DISABLE;//配置值0x00
LSM303DLHC_InitStructure.MagOutput_DataRate=LSM303DLHC_ODR_30_HZ; //配置值0x14
LSM303DLHC_InitStructure.MagFull_Scale=LSM303DLHC_FS_8_1_GA; //配置值0xE0
LSM303DLHC_InitStructure.Working_Mode=LSM303DLHC_CONTINUOS_CONVERSION; //配置值0x00
LSM303DLHC_LowLevel_Init();

cra_regm|=(uint8_t)(LSM303DLHC_InitStruct->Temperature_Sensor|LSM303DLHC_InitStruct->MagOutput_DataRate);

crb_regm|=(uint8_t)(LSM303DLHC_InitStruct->MagFull_Scale);

mr_regm|=(uint8_t)(LSM303DLHC_InitStruct->Working_Mode);

LSM303DLHC_Write(MAG_I2C_ADDRESS,LSM303DLHC_CRA_REG_M,&cra_regm);

LSM303DLHC_Write(MAG_I2C_ADDRESS,LSM303DLHC_CRB_REG_M,&crb_regm);

LSM303DLHC_Write(MAG_I2C_ADDRESS,LSM303DLHC_MR_REG_M,&mr_regm);
}
3.LSM303DLHC芯片初始化ACC(加速度)寄存器函数
voidLSM303DLHC_AccInit(LSM303DLHCAcc_InitTypeDef*LSM303DLHC_InitStruct)
{
uint8_tctrl1=0x00,ctrl4=0x00;

LSM303DLHCAcc_InitStructure.Power_Mode=LSM303DLHC_NORMAL_MODE; //配置值0x00
LSM303DLHCAcc_InitStructure.AccOutput_DataRate=LSM303DLHC_ODR_50_HZ;//配置值0x40
LSM303DLHCAcc_InitStructure.Axes_Enable=LSM303DLHC_AXES_ENABLE; //配置值0x07
LSM303DLHCAcc_InitStructure.AccFull_Scale=LSM303DLHC_FULLSCALE_2G; //配置值0x00
LSM303DLHCAcc_InitStructure.BlockData_Update=LSM303DLHC_BlockUpdate_Continous;//配置值0x00
LSM303DLHCAcc_InitStructure.Endianness=LSM303DLHC_BLE_LSB; //配置值0x00
LSM303DLHCAcc_InitStructure.High_Resolution=LSM303DLHC_HR_ENABLE; //配置值0x08
LSM303DLHC_LowLevel_Init();

ctrl1|=(uint8_t)(LSM303DLHC_InitStruct->Power_Mode|LSM303DLHC_InitStruct->AccOutput_DataRate|LSM303DLHC_InitStruct->Axes_Enable);
ctrl4|=(uint8_t)(LSM303DLHC_InitStruct->BlockData_Update|LSM303DLHC_InitStruct->Endianness|
LSM303DLHC_InitStruct->AccFull_Scale|LSM303DLHC_InitStruct->High_Resolution);

LSM303DLHC_Write(ACC_I2C_ADDRESS,LSM303DLHC_CTRL_REG1_A,&ctrl1);

LSM303DLHC_Write(ACC_I2C_ADDRESS,LSM303DLHC_CTRL_REG4_A,&ctrl4);
}

LSM303DLHCFilter_InitStructure.HighPassFilter_Mode_Selection=LSM303DLHC_HPM_NORMAL_MODE;//配置值0x80
LSM303DLHCFilter_InitStructure.HighPassFilter_CutOff_Fr