QMI8658芯片I2C驱动开发指南

本文主要是介绍QMI8658芯片I2C驱动开发指南，希望对大家解决编程问题提供一定的参考价值，需要的开发者们随着小编来一起学习吧！

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，这里I2C总线需要接10K上拉没有画出来，这个需要注意一下。
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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 QMI8658_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();return 1;}//4.寄存器地址IIC_Send_Byte(Reg);//5.waitif(IIC_Wait_Ack()){IIC_Stop();return 1;}//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();return 1;}Value = IIC_Read_Byte(1);//9.stopIIC_Stop();return Value;
}void QMI8658_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 qmi8658驱动部分

void QMI8658_Init()
{u8 uChipID = 0;u16 AX=0,AY=0,AZ=0,GX=0,GY=0,GZ=0;// 1.Device Reset & check DeviceQMI8658_WriteReg(QMI8658_DEV,CTRL9,0xA2); //PowerResetdelay_ms(2000);                           // wait stableuChipID = QMI8658_ReadReg(QMI8658_DEV,0x00); // Read IDwhile(uChipID != 0x5) delay_ms(2000);        // device checkprintf("QMC5883 check Pass!:deviceID = 0x%x \r\n",uChipID);//2.Device SettingsQMI8658_WriteReg(QMI8658_DEV,CTRL1,0x40); //地址自增，小端QMI8658_WriteReg(QMI8658_DEV,CTRL2,0x33); //配置加速度计 量程+-16g，采样率ODR==1kHZQMI8658_WriteReg(QMI8658_DEV,CTRL3,0x73); //配置陀螺仪  量程±2048 dps ,采样率是940HZQMI8658_WriteReg(QMI8658_DEV,CTRL5,0x0); //不使用低通滤波器QMI8658_WriteReg(QMI8658_DEV,CTRL6,0x0); //不使用Motion on DemandQMI8658_WriteReg(QMI8658_DEV,CTRL7,0x03); // 使能加速度计和陀螺仪  delay_ms(2000);   for(;;){AX = (u16)QMI8658_ReadReg(QMI8658_DEV,AX_H);AX = AX<<8;AX = AX | (u16)QMI8658_ReadReg(QMI8658_DEV,AX_L);AY = (u16)QMI8658_ReadReg(QMI8658_DEV,AY_H);AY = AY<<8;AY = AY | (u16)QMI8658_ReadReg(QMI8658_DEV,AY_L);AZ = (u16)QMI8658_ReadReg(QMI8658_DEV,AZ_H);AZ = AZ<<8;AZ = AZ | (u16)QMI8658_ReadReg(QMI8658_DEV,AZ_L);GX = (u16)QMI8658_ReadReg(QMI8658_DEV,GX_H);GX = GX<<8;GX = GX | (u16)QMI8658_ReadReg(QMI8658_DEV,GX_L);GY = (u16)QMI8658_ReadReg(QMI8658_DEV,GY_H);GY = GY<<8;GY = GY | (u16)QMI8658_ReadReg(QMI8658_DEV,GY_L);GZ = (u16)QMI8658_ReadReg(QMI8658_DEV,GZ_H);GZ = GZ<<8;GZ = GZ | (u16)QMI8658_ReadReg(QMI8658_DEV,GZ_L);printf("QMC5883 GX=%d\r\n", GX);printf("QMC5883 GY=%d\r\n", GY);printf("QMC5883 GZ=%d\r\n", GZ);delay_ms(60000);  }
}