Roy Theussing / Mbed 2 deprecated EMGvoorjan

emg dingetje met moving avarage

Dependencies:   HIDScope biquadFilter circular_buffer mbed

Fork of EMG by Tom Tom

main.cpp@21:77998ce2c0dd, 2017-10-20 (annotated)

Committer:
Roytsg
Date:
Fri Oct 20 11:22:11 2017 +0000
Revision:
21:77998ce2c0dd
Parent:
20:97059009a491
Child:
22:a85b568a83e5
Child:
23:b5a09f96c2d7
lp: 200 Hz; hp: 50 Hz; notch: 50 Hz

Who changed what in which revision?

UserRevisionLine numberNew contents of line
vsluiter 0:32bb76391d89 1 #include "mbed.h"
vsluiter 11:ce72ec658a95 2 #include "HIDScope.h"
Roytsg 21:77998ce2c0dd 3 #include "BiQuad.h"
vsluiter 0:32bb76391d89 4
vsluiter 4:8b298dfada81 5 //Define objects
tomlankhorst 19:2bf824669684 6 AnalogIn emg0( A0 );
tomlankhorst 19:2bf824669684 7 AnalogIn emg1( A1 );
tomlankhorst 19:2bf824669684 8
tomlankhorst 14:f83354387756 9 Ticker sample_timer;
tomlankhorst 19:2bf824669684 10 HIDScope scope( 2 );
tomlankhorst 18:21d8e7a81cf5 11 DigitalOut led(LED1);
vsluiter 2:e314bb3b2d99 12
tomlankhorst 14:f83354387756 13 /** Sample function
tomlankhorst 14:f83354387756 14 * this function samples the emg and sends it to HIDScope
tomlankhorst 14:f83354387756 15 **/
tomlankhorst 14:f83354387756 16 void sample()
vsluiter 2:e314bb3b2d99 17 {
tomlankhorst 19:2bf824669684 18 /* Set the sampled emg values in channel 0 (the first channel) and 1 (the second channel) in the 'HIDScope' instance named 'scope' */
tomlankhorst 19:2bf824669684 19 scope.set(0, emg0.read() );
tomlankhorst 19:2bf824669684 20 scope.set(1, emg1.read() );
tomlankhorst 19:2bf824669684 21 /* Repeat the step above if required for more channels of required (channel 0 up to 5 = 6 channels)
tomlankhorst 19:2bf824669684 22 * Ensure that enough channels are available (HIDScope scope( 2 ))
tomlankhorst 20:97059009a491 23 * Finally, send all channels to the PC at once */
vsluiter 11:ce72ec658a95 24 scope.send();
tomlankhorst 18:21d8e7a81cf5 25 /* To indicate that the function is working, the LED is toggled */
tomlankhorst 18:21d8e7a81cf5 26 led = !led;
vsluiter 2:e314bb3b2d99 27 }
vsluiter 0:32bb76391d89 28
Roytsg 21:77998ce2c0dd 29 BiQuadChain bqc;
Roytsg 21:77998ce2c0dd 30 BiQuad bq1( 0.6844323315947305,1.368864663189461, 0.6844323315947305,1.2243497755555954,0.5133795508233265);
Roytsg 21:77998ce2c0dd 31 BiQuad bq2( 0.6844323315947306, -1.3688646631894612, 0.6844323315947306, -1.2243497755555959, 0.5133795508233266);
Roytsg 21:77998ce2c0dd 32 BiQuad bq3( 0.7566897754116633, -1.2243497755555959, 0.7566897754116633, -1.2243497755555959, 0.5133795508233266);
Roytsg 21:77998ce2c0dd 33
Roytsg 21:77998ce2c0dd 34 Ticker emgSampleTicker;
Roytsg 21:77998ce2c0dd 35 AnalogIn emg( A0 );
Roytsg 21:77998ce2c0dd 36
Roytsg 21:77998ce2c0dd 37 void emgSample() {
Roytsg 21:77998ce2c0dd 38
Roytsg 21:77998ce2c0dd 39 double emgFiltered = bqc.step( emg.read() );
Roytsg 21:77998ce2c0dd 40 scope.set(0, emgFiltered );
Roytsg 21:77998ce2c0dd 41 scope.send();
Roytsg 21:77998ce2c0dd 42 }
Roytsg 21:77998ce2c0dd 43
Roytsg 21:77998ce2c0dd 44
vsluiter 0:32bb76391d89 45 int main()
tomlankhorst 19:2bf824669684 46 {
Roytsg 21:77998ce2c0dd 47 bqc.add( &bq1 ).add( &bq2 ).add( &bq3 );
Roytsg 21:77998ce2c0dd 48 emgSampleTicker.attach( &emgSample, 0.002 );
tomlankhorst 14:f83354387756 49 /**Attach the 'sample' function to the timer 'sample_timer'.
tomlankhorst 19:2bf824669684 50 * this ensures that 'sample' is executed every... 0.002 seconds = 500 Hz
vsluiter 4:8b298dfada81 51 */
Roytsg 21:77998ce2c0dd 52 //sample_timer.attach(&sample, 0.01);
tomlankhorst 15:0da764eea774 53
tomlankhorst 14:f83354387756 54 /*empty loop, sample() is executed periodically*/
tomlankhorst 15:0da764eea774 55 while(1) {}
vsluiter 0:32bb76391d89 56 }