Diff: main.cpp

Revision:

0:b0e06f5ed486

Child:

2:7ac5be6f3e29

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp	Wed Oct 22 05:13:23 2014 +0000
@@ -0,0 +1,41 @@
+//--------------------------------------------------------------
+// FIR フィルタ，転置形
+//      Analog Input : A0
+//      Analog Output: MCP4922 using SPI
+// 2014/10/22, Copyright (c) 2014 MIKAMI, Naoki
+//--------------------------------------------------------------
+
+#include "mbed.h"
+
+#include "ADC_Base.hpp"         // for ADC not using interrupt
+#include "DAC_MCP4922.hpp"      // for DAC MCP4922
+#include "ScfClockTim3.hpp"     // for clock supplied to SCF
+#include "Coefficients_200_LPF.hpp"
+
+using namespace Mikami;
+
+const int FS_ = 12000;          // Sampling frequency: 12 kHz
+ADC_Base adc_(A0, FS_);                 // for AD
+DAC_MCP4922 myDac_(DAC_MCP4922::DAC_A); // for DA
+
+int main()
+{
+    ScfClockTim3(500000);       // cutoff frequency: 5 kHz
+
+    float un[ORDER_+1];
+    for (int n=0; n<=ORDER_; n++)
+        un[n] = 0;
+    
+    while (true)
+    {
+        float xn = adc_.Read(); // Read from A0
+        //-----------------------------------------------
+
+        for (int k=0; k<ORDER_; k++)
+            un[k] = hm_[k]*xn + un[k+1];
+        un[ORDER_] = hm_[ORDER_]*xn;
+
+        //-----------------------------------------------
+        myDac_.Write(un[0]);    // Write to DAC
+    }
+}