如何更改ADXL355的ODR设置

编程问答 2022-06-13

问题描述

我正在使用adxl355并困惑如何更改odr（输出数据速率）的设置。这是代码。如您所见，我在主目录中有set_filter_ctl_reg。但似乎不起作用。我觉得while循环中只有一部分会影响采样率（这里与odr相同）。在数据表中，它确实说要调整滤波器以改变odr。有谁知道？谢谢！

#include "mbed.h"
#include "system_stm32f4xx.h"
#include "ADXL_355Z.h"

void Data_Collect(void);
    //The virtual COM port
    Serial pc(SERIAL_TX,SERIAL_RX);

    //The voltage supply for the accelerator and the sEMG
    DigitalOut SC1(PC_9);
    DigitalOut SC2(PC_8);
    ADXL355 acclA(PC_9,PC_12,PC_11,PC_10); //Set the SPI for the ACC_1
    ADXL355 acclB(PC_8,PC_10); //Set the SPI for the ACC_1

    Timer Time_up; //The timer for the arrangement

    //All the variable here,are global variable
    //They will be called by the Ticker function
    float ADC_Value;
    float xA,yA,zA;
    float xB,yB,zB;

    void Data_Collect(void) {
        xA = acclA.convert(acclA.scanx())*acclA.axis355_sens;
        yA = acclA.convert(acclA.scany())*acclA.axis355_sens;    
        zA = acclA.convert(acclA.scanz())*acclA.axis355_sens;

        xB = acclB.convert(acclB.scanx())*acclB.axis355_sens;
        yB = acclB.convert(acclB.scany())*acclB.axis355_sens;
        zB = acclB.convert(acclB.scanz())*acclB.axis355_sens;
        
        pc.printf("%.6f%.6f%.6f%.6f%.6f%.6f%\n",xA,zA,xB,zB);    
}    

int main() {
    pc.baud(9600);
    pc.printf("ADC sEMG demo\r\n");

    acclA.reset();
    acclB.reset();

    wait(0.1); //The waiting is needed

    acclA.set_filter_ctl_reg(acclA.HPFOFF,acclA.ODR4000HZ);
    acclB.set_filter_ctl_reg(acclB.HPFOFF,acclB.ODR4000HZ);

    wait(0.1); //The waiting is needed
    
    acclA.set_power_ctl_reg(acclA.MEASUREMENT);    
    acclB.set_power_ctl_reg(acclB.MEASUREMENT);

    wait(0.1); //The waiting is needed
    
    Time_up.start();

    while(1) {
        Data_Collect();    
    }
}

解决方法

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