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IIR filter of 1st order for ST Nucleo F401RE.
main.cpp
- Committer:
- MikamiUitOpen
- Date:
- 2014-11-12
- Revision:
- 2:ed56284ebeb7
- Parent:
- 0:22eafb1b3124
File content as of revision 2:ed56284ebeb7:
//-------------------------------------------------------------- // 1次の IIR フィルタ // Analog Input : A0 // Analog Output: MCP4922 using SPI // 2014/11/12, Copyright (c) 2014 MIKAMI, Naoki //-------------------------------------------------------------- #include "mbed.h" #include "ADC_Base.hpp" // for ADC not using interrupt #include "DAC_MCP4922.hpp" // for DAC MCP4922 using namespace Mikami; const int FS_ = 12000; // Sampling frequency: 12 kHz ADC_Base adc_(A0, FS_); // for AD DAC_MCP4922 myDac_; // for DA int main() { myDac_.ScfClockTim3(500000); // cutoff frequency: 5 kHz const float A1 = 0.8f; const float B0 = 1.0f - A1; float yn = 0; while (true) { float xn = adc_.Read(); // Read from A0 //----------------------------------------------- yn = A1*yn + B0*xn; //----------------------------------------------- myDac_.Write(yn); // Write to DAC } }