不韋 呂 / Mbed 2 deprecated UIT2_VariableIIR_LPF

Cutoff frequency variable LPF by IIR 6th-order Butterworth filter for ST Nucleo F401RE.

Dependencies:   UIT_IIR_Filter UIT_ACM1602NI UITDSP_ADDA mbed UIT_AQM1602

Diff: main.cpp

Revision:
4:460f2285dd87
Parent:
3:4086d5ad6e7a
Child:
5:b291c4653eb9
diff -r 4086d5ad6e7a -r 460f2285dd87 main.cpp
--- a/main.cpp	Wed Nov 12 10:58:32 2014 +0000
+++ b/main.cpp	Sat Nov 15 06:51:05 2014 +0000
@@ -3,7 +3,7 @@
 //      A0: Signal to be filtered
 //      A2: Value which controls cutoff frequency
 //
-// 2014/11/12, Copyright (c) 2014 MIKAMI, Naoki
+// 2014/11/15, Copyright (c) 2014 MIKAMI, Naoki
 //--------------------------------------------------------------
 
 #include "mbed.h"
@@ -64,8 +64,8 @@
     float fc1 = 0;
     while (true)
     {
-        // fc: cutoff frequency, 200 -- 1000 Hz
-        float fc = 800.0f*(a2_/4095.6f) + 200.0f;
+        // fc: cutoff frequency, 100 -- 2000 Hz
+        float fc = 1900.0f*(a2_/4095.6f) + 100.0f;
 
         if (sw1_ == 0)
         {