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QMC5883芯片I2C驱动开发指南

news 2025/8/21 20:58:13

这个芯片纯国产挺好用的，电路很好设计，我这垃圾焊功，纯手焊，，居然能用。
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第一部分硬件连接

画的很简陋，看看就可以了。
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第二部分软件驱动

I2C的具体时序实现需要自己搞定！！

2.1 I2C读写寄存器功能

u8 QMC5883_ReadReg(u8 dAddr, u8 Reg)
{u8 Value = 0;//1.启动IICIIC_Start();//2.写设备地址IIC_Send_Byte((dAddr << 1)|0);//3.waitif(IIC_Wait_Ack()){IIC_Stop();}//4.寄存器地址IIC_Send_Byte(Reg);//5.waitif(IIC_Wait_Ack()){IIC_Stop();}//6.启动IICIIC_Start();//7.设备地址IIC_Send_Byte((dAddr << 1)|1);//8.wait read ackif(IIC_Wait_Ack()){IIC_Stop();}Value = IIC_Read_Byte(0);//9.stopIIC_Stop();return Value;
}void QMC5883_WriteReg(u8 dAddr, u8 Reg, u8 Value)
{//1.启动IICIIC_Start();//2.写设备地址IIC_Send_Byte((dAddr << 1)|0);//3.waitwhile(IIC_Wait_Ack());//4.写寄存器地址IIC_Send_Byte(Reg);//5.waitIIC_Wait_Ack();//6.写valueIIC_Send_Byte(Value);//7.waitIIC_Wait_Ack();//8.stopIIC_Stop();
}

2.2 驱动部分

void QMC5883_Init()
{u8 uChipID = 0;// 1.Device Reset & check Device//QMC5883_WriteReg(QMC5883_DEV,0x0A,0x41); //PowerResetQMC5883_WriteReg(QMC5883_DEV,0x0B,0x01); //PowerResetQMC5883_WriteReg(QMC5883_DEV,0x20,0x40); //PowerResetQMC5883_WriteReg(QMC5883_DEV,0x21,0x01); //PowerResetQMC5883_WriteReg(QMC5883_DEV,0x09,0x0d); //PowerResetdelay_ms(5000);                           // wait stablewhile( uChipID!= 0xFF) {   uChipID = QMC5883_ReadReg(QMC5883_DEV,0x0D); // Read IDdelay_ms(2000);        // device check}printf("QMC5883 check Pass!:deviceID = 0x%x \r\n",uChipID);
}
void QMC5883_ReadMuti(u8 dAddr, u8 Len, u8 Reg, u8* Buff)
{u8 i = 0;for(i = 0;i<Len; i++){*(Buff+i) = QMC5883_ReadReg(dAddr,Reg+i);}   
}
void QMC5883_dataGet(void)
{QMC5883_ReadMuti(QMC5883_DEV,6,0x0,uQMC5883_Data.buffer);// 读取数据部分是前六个寄存器0x0~0x5printf("%d %d %d ", \(s16)(uQMC5883_Data.stData.AX), (s16)(uQMC5883_Data.stData.AY), (s16)(uQMC5883_Data.stData.AZ));/*printf("AX=%d AY=%d AZ=%d ", \(s16)(uQMC5883_Data.stData.AX), (s16)(uQMC5883_Data.stData.AY), (s16)(uQMC5883_Data.stData.AZ));*/
}