Skip to content
New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Jump to bottom

add function about that get EMG singal or not #1

Open
wants to merge 1 commit into
base: master
Choose a base branch
from
Open

add function about that get EMG singal or not #1

Changes from all commits
Commits
Show all changes
1 commit
Select commit
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
240 changes: 140 additions & 100 deletions examples/SimpleEMGFilters/SimpleEMGFilters.ino
View file
Open in desktop
Original file line number Diff line number Diff line change
@@ -1,33 +1,33 @@
/*
* Copyright 2017, OYMotion Inc.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
* THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
* DAMAGE.
*
*/
Copyright 2017, OYMotion Inc.
All rights reserved.

Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions
are met:

1. Redistributions of source code must retain the above copyright
notice, this list of conditions and the following disclaimer.

2. Redistributions in binary form must reproduce the above copyright
notice, this list of conditions and the following disclaimer in
the documentation and/or other materials provided with the
distribution.

THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
DAMAGE.

*/

#if defined(ARDUINO) && ARDUINO >= 100
#include "Arduino.h"
Expand All @@ -38,92 +38,132 @@
#include "EMGFilters.h"

#define _DEBUG 0
/* input pin number */
#define SensorInputPin A0

#define SensorInputPin A0 // input pin number

// Define the `CALIBRATE` macro as 1 to calibrate the baseline value
// of input sEMG signals.
//
// After wiring the sEMG sensors to the Arduino board, wear the
// sEMG sensors. Relax your muscles for a few seconds, you
// will be able to see a series of squared sEMG signals values get printed on
// your serial terminal. Choose the maximal one as the baseline by setting
// the `baseline` variable.
//
// After calibriting, change the `CALIBRATE` macro to 0, and rebuild this
// project. The `envelope`, which is the squared sEMG signal data, will be
// printed to the serial line. The developer can plot it using the Arduino
// SerialPlotter.
//
// Note:
// After calibration, Any squared value of sEMG sigal below the
// baseline will be treated as zero.
//
// It is recommended that you do calibration every time you wear
// the sEMG sensor.
/*
Define the `CALIBRATE` macro as 1 to calibrate the baseline value
of input sEMG signals.

After wiring the sEMG sensors to the Arduino board, wear the
sEMG sensors. Relax your muscles for a few seconds, you
will be able to see a series of squared sEMG signals values get printed on
your serial terminal. Choose the maximal one as the baseline by setting
the `baseline` variable.

After calibriting, change the `CALIBRATE` macro to 0, and rebuild this
project. The `envelope`, which is the squared sEMG signal data, will be
printed to the serial line. The developer can plot it using the Arduino
SerialPlotter.

Note:
After calibration, Any squared value of sEMG sigal below the
baseline will be treated as zero.

It is recommended that you do calibration every time you wear
the sEMG sensor.
*/
#define CALIBRATE 1

int baseline = 200;

EMGFilters myFilter;

// Set the input frequency.
//
// The filters work only with fixed sample frequency of
// `SAMPLE_FREQ_500HZ` or `SAMPLE_FREQ_1000HZ`.
// Inputs at other sample rates will bypass
SAMPLE_FREQUENCY sampleRate = SAMPLE_FREQ_1000HZ;
/*
Set the input frequency.

// Time interval for processing the input signal.
unsigned long long interval = 1000000ul / sampleRate;
The filters work only with fixed sample frequency of
`SAMPLE_FREQ_500HZ` or `SAMPLE_FREQ_1000HZ`.
Inputs at other sample rates will bypass
*/
SAMPLE_FREQUENCY sampleRate = SAMPLE_FREQ_500HZ;

// Set the frequency of power line hum to filter out.
//
// For countries with 60Hz power line, change to "NOTCH_FREQ_60HZ"
NOTCH_FREQUENCY humFreq = NOTCH_FREQ_50HZ;
/*
threshold:Relaxed baseline values
fistNum:The number of statistical signals
Note:The program displays the baseline values and refires the records
*/
long threshold = 500;
long EMG_num = 0;

/*
Set the frequency of power line hum to filter out.
For countries with 60Hz power line, change to "NOTCH_FREQ_60HZ"
*/
NOTCH_FREQUENCY humFreq = NOTCH_FREQ_50HZ;

void setup() {
/* add setup code here */
myFilter.init(sampleRate, humFreq, true, true, true);
/* add setup code here */
myFilter.init(sampleRate, humFreq, true, true, true);

// open serial
Serial.begin(115200);
/* open serial */
Serial.begin(115200);
}

void loop() {
// Note: `micros()` will overflow and reset every about 70 minutes.
unsigned long long timeStamp = micros();

int data = analogRead(SensorInputPin);

// filter processing
int dataAfterFilter = myFilter.update(data);

// Get envelope by squaring the input
int envelope = sq(dataAfterFilter);
int data = analogRead(SensorInputPin);
/* filter processing */
int dataAfterFilter = myFilter.update(data);
/* Get envelope by squaring the input */
int envelope = sq(dataAfterFilter);
/* The data set below the base value is set to 0, indicating that it is in a relaxed state */
envelope = (envelope > threshold) ? envelope : 0;

/* if threshold=0,explain the status it is in the calibration process,the code bollow not run.
if get EMG singal,number++ and print
*/
if (threshold > 0) {
if (getEMGCount(envelope)) {
EMG_num++;
Serial.print("EMG_num=");
Serial.println(EMG_num);
}
}
else {
Serial.println(envelope);
}
delayMicroseconds(500);
}

if (CALIBRATE) {
Serial.print("Squared Data: ");
Serial.println(envelope);
/*
if get EMG signal,return 1;
*/
int getEMGCount(int gforce_envelope)
{
static long integralData = 0;
static long integralDataEve = 0;
static bool remainFlag = false;
static unsigned long timeMillis = 0;
static unsigned long timeBeginzero = 0;
static long fistNum = 0;
static int TimeStandard = 200;

/*
The integral is processed to continuously add the signal value
and compare the integral value of the previous sampling to determine whether the signal is continuous
*/
integralDataEve = integralData;
integralData += gforce_envelope;
/*
If the integral is constant, and it doesn't equal 0, then the time is recorded;
If the value of the integral starts to change again, the remainflag is true, and the time record will be re-entered next time
*/
if ((integralDataEve == integralData) && (integralDataEve != 0)) {
timeMillis = millis();
if (remainFlag) {
timeBeginzero = timeMillis;
remainFlag = false;
return 0;
}
else {
// Any value below the `baseline` value will be treated as zero
if (envelope < baseline) {
dataAfterFilter = 0;
envelope = 0;
}
// You may plot the data using Arduino SerialPlotter.
Serial.print(envelope);
/* If the integral value exceeds 200 ms, the integral value is clear 0,return that get EMG signal */
if ((timeMillis - timeBeginzero) > TimeStandard) {
integralDataEve = integralData = 0;
return 1;
}

// Usually, you should still have (interval - timeElapsed) to do other work.
// Otherwise, you would have to lower down the `sampleRate`.
unsigned long long timeElapsed = micros() - timeStamp;
#if _DEBUG
Serial.print("Filters cost time: ");
Serial.println(timeElapsed);
#else
delay((interval - timeElapsed) / 1000);
#endif
return 0;
}
else {
remainFlag = true;
return 0;
}
}