Biorobotics10
With this script a Ball-E robot can be made and be operative for the use.
Dependencies: HIDScope MODSERIAL QEI biquadFilter mbed
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Samenvoegen_7_5
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Biorobotics10
main.cpp
- Committer:
- Wallie117
- Date:
- 2015-10-19
- Revision:
- 0:6616d722fed3
- Child:
- 1:0e1d91965b8e
File content as of revision 0:6616d722fed3:
//================================================================ Script: Ball-E ==================================================================
// Author: Ewoud Velu, Lisa Verhoeven, Robert van der Wal, Thijs van der Wal, Emily Zoetbrood
/* This is the script of a EMG measurment moving robot. The purpose of the robot is to amuse people with the disease of Ducenne.
The robot is designed to throw a ball in to a certain chosen pocket. In order to achieve this movement we use a ‘shoulder’ that can turn in the vertical plane
*/
//******************************************** Library DECLARATION **************************************
#include "mbed.h"
#include "QEI.h"
#include "MODSERIAL.h"
#include "HIDScope.h"
#include "biquadFilter.h"
#include <cmath>
#include <stdio.h>
//******************************************* FUNCTION DECLA *******************************************
//**************** INPUTS *****************
AnalogIn EMG1(A0); // Input EMG
AnalogIn EMG2(A1); // Input EMG
//AnalogIn pot(A2);
//AnalogIn pot1(A3);
QEI wheel2 (D10, D11, NC, 64,QEI::X4_ENCODING); // Function for Encoder1 on the motor1 to the Microcontroller
QEI wheel1 (D12, D13, NC, 64,QEI::X4_ENCODING); // Function for Encoder2 on the motor2 to the Microcontroller
//**************** OUTPUTS ****************
DigitalOut red(LED_RED); // LED declared for calibration
DigitalOut green(LED_GREEN); // LED declared for sampling
DigitalOut magnet(D2);
DigitalOut motor2direction(D4); // D4 en D5 zijn motor 2 (op het motorshield)
PwmOut motor2speed(D5);
DigitalOut motor1direction(D7); // D6 en D7 zijn motor 1 (op het motorshield)
PwmOut motor1speed(D6);
//**************** FUNCTIONS **************
/* HIDScope scope(4); */ // HIDScope declared with 4 scopes
MODSERIAL pc(USBTX, USBRX); // Function for Serial communication with the Microcontroller to the pc.
//******************************* GLOBAL VARIABLES DECLARATION ************************************
const int led_on = 0; // Needed for the LEDs to turn on and off
const int led_off = 1;
const int relax = 0;
const int graden = 360;
int games_played = -1; // -1 omdat het spel daar eerst loopt voor het spelen om alles na te checken
int games_played1 = 0;
bool flag_calibration = true;
//********* VARIABLES FOR MOTOR CONTROL ********
const float cw = 1; // The number if: motor1 moves clock wise motor2 moves counterclockwise
const float ccw = 0; // The number if: motor1 moves counterclock wise motor2 moves clockwise
bool flag_s = false; // Var flag_s sensor ticker
bool flag_m = false; // Var flag_m motor ticker
float ain = 0;
//********* VARIABLES FOR CONTROL 1 ************
volatile bool sample_go; // Ticker EMG function
int Fs = 512; // Sampling frequency
const double low_b1 = 1.480219865318266e-04; //Filter coefficients
const double low_b2 = 2.960439730636533e-04;
const double low_b3 = 1.480219865318266e-04;
const double low_a2 = -1.965293372622690e+00; // a1 is normalized to 1
const double low_a3 = 9.658854605688177e-01;
const double high_b1 = 8.047897937631126e-01;
const double high_b2 = -1.609579587526225e+00;
const double high_b3 = 8.047897937631126e-01;
const double high_a2 = -1.571102440190402e+00; // a1 is normalized to 1
const double high_a3 = 6.480567348620491e-01;
double u1; double y1; // Declaring the input variables
double u2; double y2;
int calibratie_metingen = 0;
//********* VARIABLES FOR FASE SWITCH **********
bool begin = true;
int fase = 3; // To switch between different phases and begins with the reset phase
const float fasecontract = 0.7; // The value the EMG signal must be for fase change
float rightbiceps = y2;
float leftbiceps = ain;
int reset = 0;
int button_pressed = 0;
int j = 1;
int N = 200;
bool fase_switch_wait = true;
//********* VARIABLES FOR CONTROL 2 ************
const float contract = 0.2; // The minimum value for which the motor moves
const float maxleft = -1000; // With this angle the motor should stop moving
const float maxright = 1000; // With this angle the motor should stop moving
const float speed_plate_1 = 0.4; // The speed of the plate in control 2
bool flag_left = true;
bool flag_right = true;
float pos_board = 0; // The position of the board begins at zero
float Encoderread2 = 0;
//********* VARIABLES FOR CONTROL 3 ************
const float minimum_contract = 0.2; // Certain levels for muscle activity to activate motor
const float medium_contract = 0.5; // "Medium contract muscle"
const float maximum_leftbiceps = 0.8; // "Maximum contract muscle"
const float on = 1.0;
const float off = 0.0;
const float minimum_throw_angle = -5;
const float maximum_throw_angle = 110;
float pos_arm = 0;
int pos_arm1 = 0;
float Encoderread1 = 0;
int switch_rondjes = 2;
int rondjes = 0;
//********* VARIABLES FOR CONTROL 4 ************
float reset_positie = 0; // Belangrijk
float reset_board = 0;
float speedcompensation;
float speedcompensation2;
int t = 5; // aftellen naar nieuw spel
int switch_reset = 1;
bool arm = false;
bool board1 = false;
// **************************************** Tickers *****************************************
Ticker Sensor_control; // Adds ticker function for the variable function : Sensors
Ticker Motor_control;
Ticker EMG_Control;
//=============================================================================================== SUB LOOPS ==================================================================================================================
//**************************** CONTROL 1-EMG CALIBRATION ***********************************
biquadFilter highpass1(high_a2, high_a3, high_b1, high_b2, high_b3); // Different objects for different inputs, otherwise the v1 and v2 variables get fucked up
biquadFilter highpass2(high_a2, high_a3, high_b1, high_b2, high_b3);
biquadFilter lowpass1(low_a2, low_a3, low_b1, low_b2, low_b3);
biquadFilter lowpass2(low_a2, low_a3, low_b1, low_b2, low_b3);
double cali_fact1 = 0.9; // calibration factor to normalize filter output to a scale of 0 - 1
double cali_fact2 = 0.9;
double cali_array1[2560] = {}; // array to store values in
double cali_array2[2560] = {};
void hoog_laag_filter()
{
u1 = EMG1;
u2 = EMG2;
y1 = highpass1.step(u1);
y2 = highpass2.step(u2); // filter order is: high-pass --> rectify --> low-pass
y1 = fabs(y1);
y2 = fabs(y2);
y1 = lowpass1.step(y1)*cali_fact1;
y2 = lowpass2.step(y2)*cali_fact2; // roughly normalize to a scale of 0 - 1, where 0 is minimum and 1 is roughly the maximum output.
}
//======================================= TICKER LOOPS ==========================================
void SENSOR_LOOP()
{
flag_s = true;
}
void MOTOR_LOOP()
{
flag_m = true;
}
void samplego() { // ticker function, set flag to true every sample interval
sample_go = 1;
}
//================================================================================================== HEAD LOOP ================================================================================================================
int main()
{
pc.baud(115200);
Sensor_control.attach(&SENSOR_LOOP, 0.01); // TICKER FUNCTION
Motor_control.attach(&MOTOR_LOOP, 0.01);
EMG_Control.attach(&samplego, (float)1/Fs);
pc.printf("===============================================================\n");
pc.printf(" \t\t\t Ball-E\n");
pc.printf("In the module Biorobotics on the University of Twente is this script created\n");
pc.printf("Autors:\tE. Velu, L. Verhoeven, R. v/d Wal, T. v/d Wal, E. Zoetbrood\n\n");
wait(3);
pc.printf("The script will begin with a short calibration\n\n");
wait(2.5);
pc.printf("===============================================================\n");
//************************* CONTROL 1-EMG CALIBRATION ****************************
while(1)
{
if(sample_go)
{
red.write(led_off); // Toggles red calibration LED off
green.write(led_on); // Toggles green sampling LED on
hoog_laag_filter();
sample_go = 0;
}
if (flag_calibration)
{ // function to calibrate the emg signals from the user. It takes 5 seconds of measurements of maximum output, then takes the max and normalizes to that.
calibratie_metingen ++;
green.write(led_off); // Toggles green sampling LED off
red.write(led_on); //Toggles red calibration LED on
cali_fact1 = 0.9; // calibration factor to normalize filter output to a scale of 0 - 1
cali_fact2 = 0.9;
double cali_max1 = 0; // declare max y1
double cali_max2 = 0; //declare max y2
pc.printf(" \n\n EMG Signal starting up Calibration measurement........... \n");
wait(2);
pc.printf("\t.....Calibrating Signal of EMG 1 and 2 .......\n");
wait(0.5);
pc.printf("\t......contract muscles..... \n");
for(int cali_index1 = 0; cali_index1 < 2560; cali_index1++) // Records 5 seconds of y1
{
hoog_laag_filter();
cali_array1[cali_index1] = y1;
wait((float)1/Fs);
}
for(int cali_index2 = 0; cali_index2 < 2560; cali_index2++) // Records 5 seconds of y2
{
hoog_laag_filter();
cali_array2[cali_index2] = y2;
wait((float)1/Fs);
}
for(int cali_index3 = 0; cali_index3 < 2560; cali_index3++) // Scales y1
{
if(cali_array1[cali_index3] > cali_max1)
{
cali_max1 = cali_array1[cali_index3];
}
}
for(int cali_index4 = 0; cali_index4 < 2560; cali_index4++) // Scales y2
{
if(cali_array2[cali_index4] > cali_max2)
{
cali_max2 = cali_array2[cali_index4];
}
}
cali_fact1 = (double)1/cali_max1; // Calibration factor for y1
cali_fact2 = (double)1/cali_max2; // Calibration factor for y2
// Toggles green sampling LED off
red.write(led_off);
green.write(led_on);
pc.printf(" \t....... Calibration has been completed!\n");
wait(0.2);
green.write(led_off);
wait(0.2);
green.write(led_on);
wait(0.2);
green.write(led_off);
wait(0.2);
green.write(led_on);
wait(4);
pc.printf("Beginning with Ball-E board settings\n");
green.write(led_off);
wait(2);
y1 = 0;
y2 = 0;
j = 1; // Wachten van fase switch initialiseren
fase_switch_wait = true;
}
//************************* CONTROL MOTOR ****************************************
if (flag_s)
{
Encoderread1 = wheel1.getPulses();
pos_arm = (Encoderread1/((64.0*131.0)/360.0)); // Omrekenen naar graden van arm
Encoderread2 = wheel2.getPulses();
pos_board = (Encoderread2/((64.0*131.0)/360.0)); // Omrekenen naar graden van board
flag_calibration = false;
}
//************************* FASE SWITCH ******************************************
//******************** Fase determination *************
if (fase_switch_wait == true)
{
j++;
wait(0.01); // Problemen met EMG metingen die te hoog zijn op het begin van script na calibratie. vandaar ff wachten en de sample loop een paar keer doorlopen.
pc.printf("waarde j = %i \n",j);
}
if( j > N){
fase_switch_wait = false;
switch(fase)
{
//******************* Fase 1 **************************
case(1):
rondjes = 0;
if (y1> contract)
{
flag_right = false;
flag_left = true;
}
if (y2 > contract)
{
flag_right = true;
flag_left = false;
}
if (pos_board <= maxleft)
{
flag_left = false;
motor2speed.write(relax);
}
if (pos_board >= maxright)
{
flag_right = false;
motor2speed.write(relax);
}
if (flag_left == true)
{
if (y1> contract)
{
motor2direction.write(ccw);
motor2speed.write(speed_plate_1);
}
else
{
motor2speed.write(relax);
}
}
if (flag_right == true)
{
if (y2 > contract)
{
motor2direction.write(cw);
motor2speed.write(speed_plate_1);
}
else
{
motor2speed.write(relax);
}
}
pc.printf("Boardposition \t %f EMG1 en EMG2 signaal = %f \t %f\n", pos_board, y1, y2);
if (y1> fasecontract && y2 > fasecontract)
{
motor2speed.write(relax);
fase = 2;
fase_switch_wait = true;
j = 0;
}
break;
//******************* Fase 2 **************************
case(2):
motor1direction.write(cw);
pos_arm1 = (pos_arm - (rondjes * 360));
switch(switch_rondjes){
case(1):
rondjes ++;
switch_rondjes = 2;
break;
case(2):
if(pos_arm1>360 & 368<pos_arm1)
{
switch_rondjes = 1;
}
break;
}
if (y2 > minimum_contract & y2 < medium_contract)
{
motor1speed.write((y2 - minimum_contract)/(medium_contract - minimum_contract));
}
if (y2 > medium_contract) // Hoger dan drempelwaarde = Actief
{
motor1speed.write((y2 - minimum_contract)/(medium_contract - minimum_contract));
}
if (y2 < minimum_contract) // Lager dan drempel = Rust
{
motor1speed.write(relax);
}
if (pos_arm1 > minimum_throw_angle & pos_arm1 < maximum_throw_angle)
{
if (y1> maximum_leftbiceps)
{
magnet.write(off);
motor1speed.write(relax);
fase = 3;
pc.printf("Van fase 2 naar fase 3\n");
wait(2);
j = 0;
fase_switch_wait = true;
}
}
pc.printf("Armposition \t %i \t EMG1 en EMG2 = %f \t %f \n", pos_arm1, y1, y2);
break;
//********************************************* Fase 3 **********************************************
case(3):
switch(switch_reset)
{
case(1):
if(pos_arm < reset_positie) //ene kant op draaien
{
motor1direction.write(cw);
speedcompensation2 = ((reset_positie - pos_arm)/900.0 + (0.1));
motor1speed.write(speedcompensation2);
}
if(pos_arm > reset_positie) //andere kant op
{
motor1direction.write(ccw);
speedcompensation2 = ((pos_arm - reset_positie)/500.0 + (0.1));
motor1speed.write(speedcompensation2);
}
if(pos_arm < reset_positie+5 && pos_arm > reset_positie-5) // Dit gaat niet goed komen, omdat het precies die waarde moet zijn
{
motor1speed.write(0);
arm = true;
switch_reset = 2;
}
pc.printf("Positie_arm = %f \t \t snelheid = %f \n",pos_arm, speedcompensation);
wait(0.0001);
break;
case(2):
pc.printf("\t switch magneet automatisch \n");
wait(1);
magnet.write(on);
wait(0.5);
switch_reset = 3;
break;
case(3):
if(pos_board < reset_board)
{
motor2direction.write(cw);
speedcompensation = ((reset_board - pos_board)/500.0 + (0.1));
motor2speed.write(speedcompensation);
}
if(pos_board > reset_board)
{
motor2direction.write(ccw);
speedcompensation = ((pos_board - reset_board)/500.0 + (0.1));
motor2speed.write(speedcompensation);
}
if(pos_board < reset_board+5 && pos_board > reset_board-5)
{
motor2speed.write(0);
board1 = true;
}
if(board1 == true)
{
red=0;
pc.printf("fase switch naar 1\n\n");
board1 = false;
arm = false;
// flag_calibration = true; !!!!! Moet naar gekeken worden of we elke spel willen calibreren
wait(2);
games_played ++;
games_played1 = games_played - (3*calibratie_metingen - 3);
pc.printf("Games played total count = %i and loop %i\n",games_played,games_played1);
if(games_played1 == 3){
flag_calibration = true;
while(t){
pc.printf("\tCalibratie begint over %i \n",t);
t--;
wait(1);
}
}
while(t){
pc.printf("\tNieuw spel begint over %i \n",t);
t--;
wait(1);
}
fase = 1; // Terug naar fase 1
switch_reset = 1; // De switch op orginele locatie zetten
t = 5;
}
pc.printf("Positie_board = %f \t \t snelheid = %f \n",pos_board, speedcompensation);
wait(0.0001);
break;
}
break;
//=================================================== STOP SCRIPT ============================================================
}
}
}
}