不韋 呂 / Mbed 2 deprecated UIT2_MovingAverage

Moving average for ST Nucleo F401RE. The number of average is controled by sw.

Dependencies:   UIT_ADDA mbed

main.cpp@1:2b1ce47a1fd7, 2014-10-29 (annotated)

Committer:
MikamiUitOpen
Date:
Wed Oct 29 23:46:29 2014 +0000
Revision:
1:2b1ce47a1fd7
Parent:
0:2e17a28353a0
Child:
2:bf617231c9bd
2

Who changed what in which revision?

UserRevisionLine numberNew contents of line
MikamiUitOpen 0:2e17a28353a0 1 //--------------------------------------------------------------
MikamiUitOpen 0:2e17a28353a0 2 // 移動平均, 平均数：1, 2, 4, 8, 16, 32, 64：スイッチで選択
MikamiUitOpen 0:2e17a28353a0 3 // Analog Input : A0
MikamiUitOpen 0:2e17a28353a0 4 // Analog Output: MCP4922 using SPI
MikamiUitOpen 0:2e17a28353a0 5 // 2014/10/29, Copyright (c) 2014 MIKAMI, Naoki
MikamiUitOpen 0:2e17a28353a0 6 //--------------------------------------------------------------
MikamiUitOpen 0:2e17a28353a0 7
MikamiUitOpen 0:2e17a28353a0 8 #include "mbed.h"
MikamiUitOpen 0:2e17a28353a0 9
MikamiUitOpen 0:2e17a28353a0 10 #include "ADC_Base.hpp" // for ADC not using interrupt
MikamiUitOpen 0:2e17a28353a0 11 #include "DAC_MCP4922.hpp" // for DAC MCP4922
MikamiUitOpen 0:2e17a28353a0 12 #include "ScfClockTim3.hpp" // for clock supplied to SCF
MikamiUitOpen 0:2e17a28353a0 13
MikamiUitOpen 0:2e17a28353a0 14 using namespace Mikami;
MikamiUitOpen 0:2e17a28353a0 15
MikamiUitOpen 0:2e17a28353a0 16 const int FS_ = 12000; // Sampling frequency: 12 kHz
MikamiUitOpen 0:2e17a28353a0 17 ADC_Base adc_(A0, FS_); // for AD
MikamiUitOpen 0:2e17a28353a0 18 DAC_MCP4922 myDac_; // for DA
MikamiUitOpen 0:2e17a28353a0 19
MikamiUitOpen 0:2e17a28353a0 20 DigitalIn sw1_(D2, PullDown);
MikamiUitOpen 0:2e17a28353a0 21 DigitalIn sw2_(D3, PullDown);
MikamiUitOpen 0:2e17a28353a0 22 DigitalIn sw4_(D4, PullDown);
MikamiUitOpen 0:2e17a28353a0 23 DigitalIn sw8_(D5, PullDown);
MikamiUitOpen 0:2e17a28353a0 24
MikamiUitOpen 0:2e17a28353a0 25 int main()
MikamiUitOpen 0:2e17a28353a0 26 {
MikamiUitOpen 0:2e17a28353a0 27 ScfClockTim3(500000); // cutoff frequency: 5 kHz
MikamiUitOpen 0:2e17a28353a0 28
MikamiUitOpen 0:2e17a28353a0 29 const int M = 64;
MikamiUitOpen 0:2e17a28353a0 30
MikamiUitOpen 0:2e17a28353a0 31 float xn[M];
MikamiUitOpen 0:2e17a28353a0 32 for (int n=0; n<M; n++) xn[n] = 0;
MikamiUitOpen 0:2e17a28353a0 33
MikamiUitOpen 0:2e17a28353a0 34 while (true)
MikamiUitOpen 0:2e17a28353a0 35 {
MikamiUitOpen 1:2b1ce47a1fd7 36 int sw = (sw8_ << 3) | (sw4_ << 2) | (sw2_ << 1) | sw1_;
MikamiUitOpen 0:2e17a28353a0 37 int nAv = 1 << sw;
MikamiUitOpen 0:2e17a28353a0 38 if (nAv > 64) nAv = 64;
MikamiUitOpen 0:2e17a28353a0 39
MikamiUitOpen 0:2e17a28353a0 40 xn[0] = adc_.Read(); // Read from A0
MikamiUitOpen 0:2e17a28353a0 41 //-----------------------------------------------
MikamiUitOpen 0:2e17a28353a0 42
MikamiUitOpen 0:2e17a28353a0 43 float yn = 0;
MikamiUitOpen 0:2e17a28353a0 44 for (int k=0; k<nAv; k++) yn = yn + xn[k];
MikamiUitOpen 0:2e17a28353a0 45 yn = yn/(float)nAv; // yn: average
MikamiUitOpen 0:2e17a28353a0 46
MikamiUitOpen 0:2e17a28353a0 47 // Update input buffer
MikamiUitOpen 0:2e17a28353a0 48 for (int k = nAv-1; k>0; k--)
MikamiUitOpen 0:2e17a28353a0 49 xn[k] = xn[k-1];
MikamiUitOpen 0:2e17a28353a0 50
MikamiUitOpen 0:2e17a28353a0 51 //-----------------------------------------------
MikamiUitOpen 0:2e17a28353a0 52 myDac_.Write(yn); // Write to DAC
MikamiUitOpen 0:2e17a28353a0 53 }
MikamiUitOpen 0:2e17a28353a0 54 }