不韋 呂 / Mbed 2 deprecated UIT2_MovingAv_Intr

Moving average using interrupt for ST Nucleo F401RE. The number of average is controled by sw. This program displays the number of average on LCD device connected by I2C.

Dependencies:   UITDSP_ADDA mbed UIT_ACM1602NI UIT_AQM1602

main.cpp

Committer:
MikamiUitOpen
Date:
2015-07-25
Revision:
7:1048beb741ef
Parent:
5:19e433ec0a20

File content as of revision 7:1048beb741ef:

//--------------------------------------------------------------
//  移動平均, 平均数：1, 2, 4, 8, 16, 32, 64：スイッチで選択
//  平均するデータ数，スイッチの状態を LCD 表示器に表示する
//
//      Analog Input : A0
//      Analog Output: MCP4921 or 4922 using SPI
// 2015/07/25, Copyright (c) 2015 MIKAMI, Naoki
//--------------------------------------------------------------

#include "mbed.h"

#include "ADC_Interrupt.hpp"    // for ADC using interrupt
#include "DAC_MCP4921.hpp"      // for DAC MCP4921, MCP4922

using namespace Mikami;

// ACM1602Ni を使う場合は次の define 文をコメントにすること
#define AQM1602

#ifdef AQM1602
#include "AQM1602.hpp"
Aqm1602 Lcd_;
#else
#include "ACM1602NI.hpp"
Acm1602Ni Lcd_;
#endif

const int FS_ = 12000;      // Sampling frequency: 12 kHz
ADC_Intr adc_(A0, FS_);     // for AD using interrupt
DAC_MCP4921 myDac_;         // for DA

BusIn sw_(D2, D3, D4, D5);  // for switch

const int M_ = 64;  // Maximum of average count
float xn_[M_];
volatile int nAv_;  // "volatile": to make sure

// Interrupt service routine for ADC
void AdcIsr()
{   
    xn_[0] = adc_.Read();   // Read from A0
    //-----------------------------------------------

    float yn = 0;
    for (int k=0; k<nAv_; k++) yn = yn + xn_[k];
    yn = yn/(float)nAv_;    // yn: average

    // Update input buffer
    for (int k = nAv_-1; k>0; k--)
        xn_[k] = xn_[k-1];

    //-----------------------------------------------
    myDac_.Write(yn);       // Write to DAC
}

int main()
{
    myDac_.ScfClockTim3(500000);    // cutoff frequency: 5 kHz
    sw_.mode(PullDown);
    Lcd_.Clear();
    adc_.SetIntrVec(AdcIsr);        // Assign ISR for ADC interrupt

    for (int n=0; n<M_; n++) xn_[n] = 0;
    
    while (true)
    {
        int sw = sw_.read();
        nAv_ = 1 << sw;
        if (nAv_ > 64) nAv_ = 64;       
        printf("\r\nnAv = %d, sw = %d", nAv_, sw);
        char str[17];
        sprintf(str, "nAv : %2d", nAv_);
        Lcd_.WriteStringXY(str, 0, 0);
        sprintf(str, "sw  : %2d", sw);
        Lcd_.WriteStringXY(str, 0, 1);

        wait(0.5f);
    }
}