不韋 呂
Cutoff frequency variable LPF, HPF, BPF, and BRF by FIR 160th-order filter.
Dependencies: UIT_ACM1602NI UITDSP_ADDA mbed UIT_AQM1602
Revision 3:24b6aa1a19ba, committed 2015-07-25
- Comitter:
- MikamiUitOpen
- Date:
- Sat Jul 25 06:36:06 2015 +0000
- Parent:
- 2:7b8a5b9de72c
- Commit message:
- 4
Changed in this revision
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/UITDSP_ADDA.lib Sat Jul 25 06:36:06 2015 +0000 @@ -0,0 +1,1 @@ +http://mbed.org/users/MikamiUitOpen/code/UITDSP_ADDA/#543daa087bd5
--- a/UIT_ACM1602NI.lib Tue Dec 09 06:10:08 2014 +0000 +++ b/UIT_ACM1602NI.lib Sat Jul 25 06:36:06 2015 +0000 @@ -1,1 +1,1 @@ -http://mbed.org/users/MikamiUitOpen/code/UIT_ACM1602NI/#b4f73f5851fb +http://mbed.org/users/MikamiUitOpen/code/UIT_ACM1602NI/#b7c761c179c9
--- a/UIT_ADDA.lib Tue Dec 09 06:10:08 2014 +0000 +++ /dev/null Thu Jan 01 00:00:00 1970 +0000 @@ -1,1 +0,0 @@ -http://mbed.org/users/MikamiUitOpen/code/UIT_ADDA/#479d18a09e87
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/UIT_AQM1602.lib Sat Jul 25 06:36:06 2015 +0000 @@ -0,0 +1,1 @@ +http://mbed.org/users/MikamiUitOpen/code/UIT_AQM1602/#c943f05b7843
--- a/WindowingDesign/WindowingDesign.cpp Tue Dec 09 06:10:08 2014 +0000
+++ b/WindowingDesign/WindowingDesign.cpp Sat Jul 25 06:36:06 2015 +0000
@@ -31,7 +31,7 @@
if (pb == HPF) fC_ = 0.5f*FS_ - fc1;
float w0 = PI_FS_*(fc1 + fc2);
- if ((pb == BPF) || (pb == BPF))
+ if ((pb == BPF) || (pb == BRF))
fC_ = 0.5f*fabs(fc2 - fc1);
if (order != order_)
--- a/main.cpp Tue Dec 09 06:10:08 2014 +0000
+++ b/main.cpp Sat Jul 25 06:36:06 2015 +0000
@@ -4,32 +4,36 @@
// A2: Value which controls cutoff frequency
//
// 1: LPF, 3: HPF, 5: BPF, 7: BRF, even: through
-// 2014/12/09, Copyright (c) 2014 MIKAMI, Naoki
+// 2015/07/25, Copyright (c) 2015 MIKAMI, Naoki
//------------------------------------------------------------------------------
-#include "mbed.h"
-
#include "ADC_Interrupt.hpp" // for ADC using interrupt
-#include "DAC_MCP4922.hpp" // for DAC MCP4922
-#include "ACM1602NI.hpp" // for LCD display
+#include "DAC_MCP4921.hpp" // for DAC MCP4921, MCP4922
+using namespace Mikami;
#include "WindowingDesign.hpp" // for design of FIR filter
-using namespace Mikami;
+// ACM1602Ni を使う場合は次の define 文をコメントにすること
+#define AQM1602
+
+#ifdef AQM1602
+#include "AQM1602.hpp"
+Aqm1602 Lcd_;
+#else
+#include "ACM1602NI.hpp"
+Acm1602Ni Lcd_;
+#endif
const int FS_ = 16000; // Sampling frequency: 16 kHz
ADC_Intr myAdc_(A0, FS_, A1, A2);
-DAC_MCP4922 myDac_;
+DAC_MCP4921 myDac_;
const int ORDER_ = 160;
float hm_[ORDER_/2+1];
float xn_[ORDER_+1];
-DigitalIn sw1_(D2, PullDown);
-DigitalIn sw2_(D3, PullDown);
-DigitalIn sw4_(D4, PullDown);
-DigitalIn sw8_(D5, PullDown);
-
+BusIn sws_(D2, D3, D4, D5);
+int sw_;
WindowingDesign design_(ORDER_, FS_);
uint16_t a2_ = 0; // Inputted data from A2 pin
@@ -52,8 +56,10 @@
xn_[k] = xn_[k-1]; // move input signals
//-----------------------------------------
- if (sw1_ == 0) myDac_.Write(xn_[0]); // Using no filter
- else myDac_.Write(yn); // Using filter
+ if ((sw_ & 0x01) == 0)
+ myDac_.Write(xn_[0]); // Using no filter
+ else
+ myDac_.Write(yn); // Using filter
// Read value which controls cutoff frequency
a2_ = myAdc_.ReadWait_u16();
@@ -63,11 +69,12 @@
// and enable ADC_IRQn
}
+void printfLcdDesign(WindowingDesign::Type pb, char str[], int f1, int f2 = 0);
+
int main()
{
myDac_.ScfClockTim3(670000); // cutoff frequency: 6.7 kHz
-
- Acm1602Ni lcd; // objetc for display using LCD
+ sws_.mode(PullDown);
// Clear buffer in FIR filter
for (int n=0; n<=ORDER_; n++)
@@ -77,14 +84,14 @@
float fc1 = 0;
while (true)
{
- int sw = (sw8_ << 3) | (sw4_ << 2) | (sw2_ << 1) | sw1_;
- if (sw1_ == 0)
+ sw_ = sws_.read();
+ if ((sw_ & 0x01) == 0)
{
printf("Through\r\n");
- lcd.ClearLine(1);
- lcd.WriteStringXY("Through ", 0, 0);
+ Lcd_.ClearLine(1);
+ Lcd_.WriteStringXY("Through ", 0, 0);
wait(0.2f);
- lcd.ClearLine(0);
+ Lcd_.ClearLine(0);
fc1 = 0;
}
else
@@ -94,29 +101,17 @@
if (fabs(fc - fc1) > 10.0f)
{
- printf("fc = %4d\r\n", int(fc+0.5f));
- char str[18];
- sprintf(str, "fc = %4d Hz", int(fc+0.5f));
- lcd.WriteStringXY(str, 0, 1);
fc1 = fc;
- switch (sw)
+ switch (sw_)
{
- case 1: printf("LPF\r\n");
- lcd.WriteStringXY("LPF", 0, 0);
- design_.Design(ORDER_, design_.LPF, fc, 0, hm_);
+ case 1: printfLcdDesign(design_.LPF, "LPF", fc+0.5f);
break;
- case 3: printf("HPF\r\n");
- lcd.WriteStringXY("HPF", 0, 0);
- design_.Design(ORDER_, design_.HPF, fc, 0, hm_);
+ case 3: printfLcdDesign(design_.HPF, "HPF", fc+0.5f);
break;
- case 5: printf("BPF\r\n");
- lcd.WriteStringXY("BPF", 0, 0);
- design_.Design(ORDER_, design_.BPF, fc-100, fc+100, hm_);
+ case 5: printfLcdDesign(design_.BPF, "BPF", fc-100, fc+100);
break;
- case 7: printf("BRF\r\n");
- lcd.WriteStringXY("BRF", 0, 0);
- design_.Design(ORDER_, design_.BRF, fc-100, fc+100, hm_);
+ case 7: printfLcdDesign(design_.BRF, "BRF", fc-150, fc+150);
break;
}
}
@@ -124,3 +119,23 @@
wait(0.1f);
}
}
+
+void printfLcdDesign(WindowingDesign::Type pb, char str[], int f1, int f2)
+{
+ printf(((string)str+"\r\n").c_str());
+ Lcd_.WriteStringXY(str, 0, 0);
+ char strFc[17];
+ if (f2 == 0)
+ {
+ printf("fc = %4d Hz\r\n", f1);
+ sprintf(strFc, "fc: %4d Hz", f1);
+ }
+ else
+ {
+ printf("fc = %4d, %4d Hz\r\n", f1, f2);
+ sprintf(strFc, "fc: %4d,%4d Hz", f1, f2);
+ }
+ Lcd_.WriteStringXY(strFc, 0, 1);
+
+ design_.Design(ORDER_, pb, f1, f2, hm_);
+}
--- a/mbed.bld Tue Dec 09 06:10:08 2014 +0000 +++ b/mbed.bld Sat Jul 25 06:36:06 2015 +0000 @@ -1,1 +1,1 @@ -http://mbed.org/users/mbed_official/code/mbed/builds/4fc01daae5a5 \ No newline at end of file +http://mbed.org/users/mbed_official/code/mbed/builds/bad568076d81 \ No newline at end of file