Jasper Gerth / Mbed 2 deprecated lowpassfilter_pot

Dependencies:   Encoder HIDScope mbed

Files at this revision

API Documentation at this revision

Revision 0:22b8e11fe177, committed 2015-09-22

Comitter:
Gerth
Date:
Tue Sep 22 14:11:37 2015 +0000
Commit message:
first publication. filter and coefficients added; ;

Changed in this revision

Encoder.lib Show annotated file Show diff for this revision Revisions of this file
HIDScope.lib Show annotated file Show diff for this revision Revisions of this file
main.cpp Show annotated file Show diff for this revision Revisions of this file
mbed.bld Show annotated file Show diff for this revision Revisions of this file 
diff -r 000000000000 -r 22b8e11fe177 Encoder.lib
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/Encoder.lib	Tue Sep 22 14:11:37 2015 +0000
@@ -0,0 +1,1 @@
+http://developer.mbed.org/users/vsluiter/code/Encoder/#18b000b443af

diff -r 000000000000 -r 22b8e11fe177 HIDScope.lib
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/HIDScope.lib	Tue Sep 22 14:11:37 2015 +0000
@@ -0,0 +1,1 @@
+http://developer.mbed.org/users/tomlankhorst/code/HIDScope/#5020a2c0934b

diff -r 000000000000 -r 22b8e11fe177 main.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp	Tue Sep 22 14:11:37 2015 +0000
@@ -0,0 +1,40 @@
+#include "mbed.h"
+#include "HIDScope.h"
+#include "encoder.h"
+
+//hidscope
+HIDScope scope(2);
+
+//potmeter in
+AnalogIn pot1(A0);
+
+//tickers
+Ticker scopetimer;
+Ticker potread;
+
+//filter coefficients from asn filter designer
+//Biquad #1
+const double gain_f1=0.049174;
+const double B_f1[] = { 1.00000000000,  1.00000000000,  0.00000000000};
+const double A_f1[] = { 1.00000000000, -0.90165118786,  0.00000000000};
+
+//Biquad #2
+const double gain_f2 = 0.109068;
+const double B_f2[] = { 1.00000000000, -1.81192934459,  1.00000000000};
+const double A_f2[] = { 1.00000000000, -1.89186536594,  0.91237793985};
+
+//filterwaardes uit asn
+double v1 = 0, v2 = 0, u = 0, y = 0;
+const double a1_f1 = gain_f1*A_f1[1], a2_f1 = gain_f1*A_f1[2], b0_f1 = gain_f1*B_f1[0], b1_f1 = gain_f1*B_f1[1], b2_f1 = gain_f1*B_f1[2]; //filter coefficients filter 1
+const double a1_f2 = gain_f2*A_f1[1], a2_f2 = gain_f2*A_f2[2], b0_f2 = gain_f2*B_f2[0], b1_f2 = gain_f2*B_f2[1], b2_f2 = gain_f2*B_f2[2]; //filter coefficients filter 1
+
+
+//biquad filter
+// Biquad filter (See slide 14)
+double biquad( double u, double &v1, double &v2, const double a1, const double a2,
+        const double b0, const double b1, const double b2 ){
+    double v = u - a1*v1 - a2*v2;
+    double y = b0*v + b1*v1 + b2*v2;
+    v2 = v1; v1 = v;
+    return y;
+}

diff -r 000000000000 -r 22b8e11fe177 mbed.bld
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/mbed.bld	Tue Sep 22 14:11:37 2015 +0000
@@ -0,0 +1,1 @@
+http://mbed.org/users/mbed_official/code/mbed/builds/4f6c30876dfa
\ No newline at end of file