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FIR filter of Direct form for ST Nucleo F401RE.
Dependencies: UITDSP_ADDA mbed
main.cpp
- Committer:
- MikamiUitOpen
- Date:
- 2015-09-04
- Revision:
- 8:927d97f834b0
- Parent:
- 6:5a7e4d3d786a
File content as of revision 8:927d97f834b0:
//-------------------------------------------------------------- // FIR フィルタ,基本的な構造 // Analog Input : A0 // Analog Output: MCP4922 using SPI // 2015/07/03, Copyright (c) 2015 MIKAMI, Naoki //-------------------------------------------------------------- #include "ADC_BuiltIn.hpp" // for ADC not using interrupt #include "DAC_MCP4921.hpp" // for DAC MCP4921, MCP4922 #include "Coefficients_200_LPF.hpp" using namespace Mikami; const int FS_ = 12000; // Sampling frequency: 12 kHz ADC_BuiltIn adc_(A0, FS_); // for AD DAC_MCP4921 myDac_; // for DA int main() { myDac_.ScfClockTim3(500000); // cutoff frequency: 5 kHz float xn[ORDER_+1]; for (int n=0; n<=ORDER_; n++) xn[n] = 0; while (true) { xn[0] = adc_.Read(); // Read from A0 //----------------------------------------------- float yn = 0; for (int k=0; k<=ORDER_; k++) yn = yn + hm_[k]*xn[k]; for (int k=ORDER_; k>0; k--) xn[k] = xn[k-1]; // move input signals //----------------------------------------------- myDac_.Write(yn); // Write to DAC } }