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@2:7ac5be6f3e29, 2014-10-23 (annotated)

Committer:
MikamiUitOpen
Date:
Thu Oct 23 00:23:02 2014 +0000
Revision:
2:7ac5be6f3e29
Parent:
0:b0e06f5ed486
Child:
4:17ca341bea00
3

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 2:7ac5be6f3e29 5 // 2014/10/23, 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 "ScfClockTim3.hpp" // for clock supplied to SCF
MikamiUitOpen 0:b0e06f5ed486 13 #include "Coefficients_200_LPF.hpp"
MikamiUitOpen 0:b0e06f5ed486 14
MikamiUitOpen 0:b0e06f5ed486 15 using namespace Mikami;
MikamiUitOpen 0:b0e06f5ed486 16
MikamiUitOpen 2:7ac5be6f3e29 17 const int FS_ = 12000; // Sampling frequency: 12 kHz
MikamiUitOpen 2:7ac5be6f3e29 18 ADC_Base adc_(A0, FS_); // for AD
MikamiUitOpen 2:7ac5be6f3e29 19 DAC_MCP4922 myDac_; // for DA
MikamiUitOpen 0:b0e06f5ed486 20
MikamiUitOpen 0:b0e06f5ed486 21 int main()
MikamiUitOpen 0:b0e06f5ed486 22 {
MikamiUitOpen 0:b0e06f5ed486 23 ScfClockTim3(500000); // cutoff frequency: 5 kHz
MikamiUitOpen 0:b0e06f5ed486 24
MikamiUitOpen 0:b0e06f5ed486 25 float un[ORDER_+1];
MikamiUitOpen 0:b0e06f5ed486 26 for (int n=0; n<=ORDER_; n++)
MikamiUitOpen 0:b0e06f5ed486 27 un[n] = 0;
MikamiUitOpen 0:b0e06f5ed486 28
MikamiUitOpen 0:b0e06f5ed486 29 while (true)
MikamiUitOpen 0:b0e06f5ed486 30 {
MikamiUitOpen 0:b0e06f5ed486 31 float xn = adc_.Read(); // Read from A0
MikamiUitOpen 0:b0e06f5ed486 32 //-----------------------------------------------
MikamiUitOpen 0:b0e06f5ed486 33
MikamiUitOpen 0:b0e06f5ed486 34 for (int k=0; k<ORDER_; k++)
MikamiUitOpen 0:b0e06f5ed486 35 un[k] = hm_[k]*xn + un[k+1];
MikamiUitOpen 0:b0e06f5ed486 36 un[ORDER_] = hm_[ORDER_]*xn;
MikamiUitOpen 0:b0e06f5ed486 37
MikamiUitOpen 0:b0e06f5ed486 38 //-----------------------------------------------
MikamiUitOpen 0:b0e06f5ed486 39 myDac_.Write(un[0]); // Write to DAC
MikamiUitOpen 0:b0e06f5ed486 40 }
MikamiUitOpen 0:b0e06f5ed486 41 }