Dominique Clevers
werkend filter: 50 hz notch 20 hz hoogdoorlaat 80 hz laagdoorlaat geabsoluteerd vermenigvuldigd met 10
Dependencies: HIDScope mbed-dsp mbed
Revision 0:68c8cf9a1f96, committed 2014-10-09
- Comitter:
- Daanmk
- Date:
- Thu Oct 09 12:26:39 2014 +0000
- Child:
- 1:a21d78fa1712
- Commit message:
- Originieel, lowpass, highpass 0.5hz
Changed in this revision
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/HIDScope.lib Thu Oct 09 12:26:39 2014 +0000 @@ -0,0 +1,1 @@ +http://mbed.org/users/tomlankhorst/code/HIDScope/#e44574634162
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp Thu Oct 09 12:26:39 2014 +0000
@@ -0,0 +1,67 @@
+/***************************************/
+/* */
+/* BRONCODE GROEP 5, MODULE 9, 2014 */
+/* *****-THE SLAP-****** */
+/* */
+/* -Dominique Clevers */
+/* -Rianne van Dommelen */
+/* -Daan de Muinck Keizer */
+/* -David den Houting */
+/* -Marjolein Thijssen */
+/***************************************/
+#include "mbed.h"
+#include "HIDScope.h"
+#include "arm_math.h"
+
+//Define objects
+AnalogIn emg0(PTB0); //Biceps
+AnalogIn emg1(PTB1); //Triceps
+HIDScope scope(2);
+
+arm_biquad_casd_df1_inst_f32 lowpass;
+//constants for 5Hz lowpass
+float lowpass_const[] = {0.02008337 , 0.04016673 , 0.02008337 , 1.56101808 , -0.64135154};
+//state values
+float lowpass_states[4];
+arm_biquad_casd_df1_inst_f32 highpass;
+//constants for 0.5Hz highpass
+float highpass_const[] = {0.97803048, -1.95606096, 0.97803048, 1.95557824 , -0.95654368};
+//state values
+float highpass_states[4];
+
+void looper()
+{
+ /*variable to store value in*/
+ uint16_t emg_value;
+ float filtered_emg;
+ float emg_value_f32;
+ /*put raw emg value both in red and in emg_value*/
+ emg_value = emg0.read_u16(); // read direct ADC result, converted to 16 bit integer (0..2^16 = 0..65536 = 0..3.3V)
+ emg_value_f32 = emg0.read();
+
+ //process emg
+ arm_biquad_cascade_df1_f32(&highpass, &emg_value_f32, &filtered_emg, 1 );
+ filtered_emg = fabs(filtered_emg);
+ arm_biquad_cascade_df1_f32(&lowpass, &filtered_emg, &filtered_emg, 1 );
+
+ /*send value to PC. */
+ scope.set(0,emg_value); //uint value
+ scope.set(1,filtered_emg); //processed float
+ scope.send();
+
+}
+
+int main()
+{
+ Ticker log_timer;
+ //set up filters. Use external array for constants
+ arm_biquad_cascade_df1_init_f32(&lowpass,1 , lowpass_const, lowpass_states);
+ arm_biquad_cascade_df1_init_f32(&highpass,1 ,highpass_const,highpass_states);
+
+ log_timer.attach(looper, 0.005);
+ while(1) //Loop
+ {
+ /*Empty!*/
+ /*Everything is handled by the interrupt routine now!*/
+ }
+}
\ No newline at end of file
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/mbed-dsp.lib Thu Oct 09 12:26:39 2014 +0000 @@ -0,0 +1,1 @@ +http://mbed.org/teams/mbed-official/code/mbed-dsp/#7a284390b0ce
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/mbed.bld Thu Oct 09 12:26:39 2014 +0000 @@ -0,0 +1,1 @@ +http://mbed.org/users/mbed_official/code/mbed/builds/552587b429a1 \ No newline at end of file