不韋 呂 / Mbed 2 deprecated UIT2_FIR_LPF_Transposed

FIR filter of transposed form for ST Nucleo F401RE.

Dependencies:   UIT_ADDA mbed

main.cpp@5:0819b64a9620, 2014-11-15 (annotated)

Committer:
MikamiUitOpen
Date:
Sat Nov 15 06:12:12 2014 +0000
Revision:
5:0819b64a9620
Parent:
4:17ca341bea00 
6

Who changed what in which revision?

UserRevisionLine numberNew contents of line
MikamiUitOpen 0:b0e06f5ed486 1 //--------------------------------------------------------------
MikamiUitOpen 0:b0e06f5ed486 2 // FIR フィルタ，転置形
MikamiUitOpen 0:b0e06f5ed486 3 // Analog Input : A0
MikamiUitOpen 0:b0e06f5ed486 4 // Analog Output: MCP4922 using SPI
MikamiUitOpen 4:17ca341bea00 5 // 2014/11/12, Copyright (c) 2014 MIKAMI, Naoki
MikamiUitOpen 0:b0e06f5ed486 6 //--------------------------------------------------------------
MikamiUitOpen 0:b0e06f5ed486 7
MikamiUitOpen 0:b0e06f5ed486 8 #include "mbed.h"
MikamiUitOpen 0:b0e06f5ed486 9
MikamiUitOpen 0:b0e06f5ed486 10 #include "ADC_Base.hpp" // for ADC not using interrupt
MikamiUitOpen 0:b0e06f5ed486 11 #include "DAC_MCP4922.hpp" // for DAC MCP4922
MikamiUitOpen 0:b0e06f5ed486 12 #include "Coefficients_200_LPF.hpp"
MikamiUitOpen 0:b0e06f5ed486 13
MikamiUitOpen 0:b0e06f5ed486 14 using namespace Mikami;
MikamiUitOpen 0:b0e06f5ed486 15
MikamiUitOpen 2:7ac5be6f3e29 16 const int FS_ = 12000; // Sampling frequency: 12 kHz
MikamiUitOpen 2:7ac5be6f3e29 17 ADC_Base adc_(A0, FS_); // for AD
MikamiUitOpen 2:7ac5be6f3e29 18 DAC_MCP4922 myDac_; // for DA
MikamiUitOpen 0:b0e06f5ed486 19
MikamiUitOpen 0:b0e06f5ed486 20 int main()
MikamiUitOpen 0:b0e06f5ed486 21 {
MikamiUitOpen 4:17ca341bea00 22 myDac_.ScfClockTim3(500000); // cutoff frequency: 5 kHz
MikamiUitOpen 0:b0e06f5ed486 23
MikamiUitOpen 0:b0e06f5ed486 24 float un[ORDER_+1];
MikamiUitOpen 0:b0e06f5ed486 25 for (int n=0; n<=ORDER_; n++)
MikamiUitOpen 0:b0e06f5ed486 26 un[n] = 0;
MikamiUitOpen 0:b0e06f5ed486 27
MikamiUitOpen 0:b0e06f5ed486 28 while (true)
MikamiUitOpen 0:b0e06f5ed486 29 {
MikamiUitOpen 0:b0e06f5ed486 30 float xn = adc_.Read(); // Read from A0
MikamiUitOpen 0:b0e06f5ed486 31 //-----------------------------------------------
MikamiUitOpen 0:b0e06f5ed486 32
MikamiUitOpen 0:b0e06f5ed486 33 for (int k=0; k<ORDER_; k++)
MikamiUitOpen 0:b0e06f5ed486 34 un[k] = hm_[k]*xn + un[k+1];
MikamiUitOpen 0:b0e06f5ed486 35 un[ORDER_] = hm_[ORDER_]*xn;
MikamiUitOpen 0:b0e06f5ed486 36
MikamiUitOpen 0:b0e06f5ed486 37 //-----------------------------------------------
MikamiUitOpen 0:b0e06f5ed486 38 myDac_.Write(un[0]); // Write to DAC
MikamiUitOpen 0:b0e06f5ed486 39 }
MikamiUitOpen 0:b0e06f5ed486 40 }