不韋 呂
/
UIT2_IIR_1stOrder
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Revision 0:22eafb1b3124, committed 2014-10-29
- Comitter:
- MikamiUitOpen
- Date:
- Wed Oct 29 09:46:52 2014 +0000
- Child:
- 1:e6237765465f
- Commit message:
- 1
Changed in this revision
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/UIT_ADDA.lib Wed Oct 29 09:46:52 2014 +0000 @@ -0,0 +1,1 @@ +http://mbed.org/users/MikamiUitOpen/code/UIT_ADDA/#77bc5550dc10
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp Wed Oct 29 09:46:52 2014 +0000
@@ -0,0 +1,38 @@
+//--------------------------------------------------------------
+// １次の IIR フィルタ
+// Analog Input : A0
+// Analog Output: MCP4922 using SPI
+// 2014/10/29, 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
+
+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()
+{
+ 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
+ }
+}
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/mbed.bld Wed Oct 29 09:46:52 2014 +0000 @@ -0,0 +1,1 @@ +http://mbed.org/users/mbed_official/code/mbed/builds/552587b429a1 \ No newline at end of file