Jesse Kaiser / Mbed 2 deprecated EMGcontrol_XY_Table

4 directional EMG control of the XY table. Made during my bachelor end assignment.

Dependencies:   C12832_lcd HIDScope mbed-dsp mbed

main.cpp@25:144eb5822aa7, 2015-05-08 (annotated)

Committer:
jessekaiser
Date:
Fri May 08 15:01:30 2015 +0000
Revision:
25:144eb5822aa7
Parent:
24:c4c5d30a3938
Child:
26:b88ff19ff5dc
Ik krijg EMG signaal!

Who changed what in which revision?

UserRevisionLine numberNew contents of line
jessekaiser 0:3acdd563582f 1 #include "mbed.h"
jessekaiser 10:7f94cd65c910 2 #include "C12832_lcd.h"
jessekaiser 23:4d050e85e863 3 #include "arm_math.h"
jessekaiser 23:4d050e85e863 4 #include "HIDScope.h"
jessekaiser 0:3acdd563582f 5
jessekaiser 15:ae8b209e8493 6 #define P_GAIN 0.998
jessekaiser 11:74ae4e5e11ab 7
jessekaiser 23:4d050e85e863 8 //Motor control
jessekaiser 0:3acdd563582f 9 DigitalOut Dir(p21);
jessekaiser 0:3acdd563582f 10 PwmOut Step(p22);
jessekaiser 23:4d050e85e863 11
jessekaiser 23:4d050e85e863 12 //Signal to and from computer
jessekaiser 23:4d050e85e863 13 Serial pc(USBTX, USBRX);
jessekaiser 23:4d050e85e863 14
jessekaiser 24:c4c5d30a3938 15 DigitalOut Enable(p25);
jessekaiser 23:4d050e85e863 16
jessekaiser 23:4d050e85e863 17 //Microstepping
jessekaiser 0:3acdd563582f 18 DigitalOut MS1(p27);
jessekaiser 0:3acdd563582f 19 DigitalOut MS2(p28);
jessekaiser 0:3acdd563582f 20 DigitalOut MS3(p29);
jessekaiser 23:4d050e85e863 21
jessekaiser 23:4d050e85e863 22 //Potmeter and EMG
jessekaiser 10:7f94cd65c910 23 AnalogIn Pot1(p19);
jessekaiser 25:144eb5822aa7 24 AnalogIn emg0(p17);
jessekaiser 24:c4c5d30a3938 25 //HIDScope scope(2);
jessekaiser 25:144eb5822aa7 26
jessekaiser 23:4d050e85e863 27 //lcd
jessekaiser 23:4d050e85e863 28 C12832_LCD lcd;
jessekaiser 0:3acdd563582f 29
jessekaiser 23:4d050e85e863 30 //Variables for motor control
jessekaiser 23:4d050e85e863 31 float setpoint = 7000; //Frequentie
jessekaiser 23:4d050e85e863 32 float step_freq = 1;
jessekaiser 23:4d050e85e863 33
jessekaiser 23:4d050e85e863 34
jessekaiser 23:4d050e85e863 35 // Filters
jessekaiser 23:4d050e85e863 36 arm_biquad_casd_df1_inst_f32 lowpass_pot;
jessekaiser 23:4d050e85e863 37 arm_biquad_casd_df1_inst_f32 lowpass_step;
jessekaiser 23:4d050e85e863 38
jessekaiser 23:4d050e85e863 39 //lowpass filter settings: Fc = 2 Hz, Fs = 100 Hz, Gain = 6 dB
jessekaiser 23:4d050e85e863 40 float lowpass_const[] = {0.007820199259120319, 0.015640398518240638, 0.007820199259120319, 1.7347238224240125, -0.7660046194604936};
jessekaiser 23:4d050e85e863 41 //lowpass for step_freq: Fc = 2 Hz, Fs = 100, Gain = 6 dB
jessekaiser 23:4d050e85e863 42 float lowpass1_const[] = {0.007820199259120319, 0.015640398518240638, 0.007820199259120319, 1.7347238224240125, -0.7660046194604936};
jessekaiser 23:4d050e85e863 43
jessekaiser 23:4d050e85e863 44 //EMG filter
jessekaiser 23:4d050e85e863 45 arm_biquad_casd_df1_inst_f32 lowpass_biceps;
jessekaiser 23:4d050e85e863 46 //lowpass filter settings biceps: Fc = 2 Hz, Fs = 500 Hz, Gain = -3 dB
jessekaiser 23:4d050e85e863 47 float lowpass2_const[] = {0.00015514839749793376, 0.00031029679499586753, 0.00015514839749793376, 1.9644602512795832, -0.9650808448695751};
jessekaiser 23:4d050e85e863 48 arm_biquad_casd_df1_inst_f32 highnotch_biceps;
jessekaiser 23:4d050e85e863 49 //highpass filter settings: Fc = 10 Hz, Fs = 500 Hz, Gain = -3 dB, notch Fc = 50, Fs =500Hz, Gain = -3 dB
jessekaiser 23:4d050e85e863 50 float highnotch_const[] = {0.9149684297741606, -1.8299368595483212, 0.9149684297741606, 1.8226935021735358, -0.8371802169231065 ,0.7063988100714527, -1.1429772843080923, 0.7063988100714527, 1.1429772843080923, -0.41279762014290533};
jessekaiser 23:4d050e85e863 51
jessekaiser 23:4d050e85e863 52
jessekaiser 23:4d050e85e863 53 //state values
jessekaiser 23:4d050e85e863 54 float lowpass_biceps_states[4];
jessekaiser 23:4d050e85e863 55 float highnotch_biceps_states[8];
jessekaiser 23:4d050e85e863 56 float lowpass_pot_states[4];
jessekaiser 23:4d050e85e863 57 float lowpass1_step_states[4];
jessekaiser 23:4d050e85e863 58
jessekaiser 23:4d050e85e863 59 //global variabels
jessekaiser 23:4d050e85e863 60 float filtered_biceps;
jessekaiser 23:4d050e85e863 61 float filtered_pot;
jessekaiser 23:4d050e85e863 62 float filtered_average_pot;
jessekaiser 23:4d050e85e863 63 float filtered_step;
jessekaiser 23:4d050e85e863 64 float pot_value1_f32;
jessekaiser 23:4d050e85e863 65
jessekaiser 24:c4c5d30a3938 66
jessekaiser 23:4d050e85e863 67 void looper_emg()
jessekaiser 23:4d050e85e863 68 {
jessekaiser 23:4d050e85e863 69 /*variable to store value in*/
jessekaiser 25:144eb5822aa7 70 volatile uint16_t emg_value1;
jessekaiser 23:4d050e85e863 71
jessekaiser 23:4d050e85e863 72 float emg_value1_f32;
jessekaiser 23:4d050e85e863 73
jessekaiser 23:4d050e85e863 74 /*put raw emg value both in red and in emg_value*/
jessekaiser 25:144eb5822aa7 75 emg_value1 = emg0.read_u16(); // read direct ADC result, converted to 16 bit integer (0..2^16 = 0..65536 = 0..3.3V)
jessekaiser 23:4d050e85e863 76 emg_value1_f32 = emg0.read();
jessekaiser 23:4d050e85e863 77
jessekaiser 23:4d050e85e863 78 //process emg biceps
jessekaiser 23:4d050e85e863 79 arm_biquad_cascade_df1_f32(&highnotch_biceps, &emg_value1_f32, &filtered_biceps, 1 );
jessekaiser 23:4d050e85e863 80 filtered_biceps = fabs(filtered_biceps);
jessekaiser 23:4d050e85e863 81 arm_biquad_cascade_df1_f32(&lowpass_biceps, &filtered_biceps, &filtered_biceps, 1 );
jessekaiser 23:4d050e85e863 82
jessekaiser 23:4d050e85e863 83 /*send value to PC. */
jessekaiser 24:c4c5d30a3938 84 //scope.set(0,emg_value1); //Raw EMG signal biceps
jessekaiser 24:c4c5d30a3938 85 //scope.set(1,filtered_biceps); //Filtered signal
jessekaiser 24:c4c5d30a3938 86 //scope.send();
jessekaiser 23:4d050e85e863 87 }
jessekaiser 23:4d050e85e863 88 void looper_pot()
jessekaiser 23:4d050e85e863 89 {
jessekaiser 23:4d050e85e863 90
jessekaiser 23:4d050e85e863 91 pot_value1_f32 = Pot1.read() - 0.500;
jessekaiser 23:4d050e85e863 92
jessekaiser 23:4d050e85e863 93 //process input
jessekaiser 23:4d050e85e863 94 arm_biquad_cascade_df1_f32(&lowpass_pot, &pot_value1_f32, &filtered_pot, 1 );
jessekaiser 23:4d050e85e863 95 }
jessekaiser 23:4d050e85e863 96
jessekaiser 23:4d050e85e863 97 void looper_motor()
jessekaiser 23:4d050e85e863 98 {
jessekaiser 23:4d050e85e863 99 float new_step_freq;
jessekaiser 23:4d050e85e863 100 new_step_freq = (setpoint*pot_value1_f32*2);
jessekaiser 23:4d050e85e863 101 step_freq = abs(new_step_freq); //Gives the PWM frequenty to the motor.
jessekaiser 23:4d050e85e863 102 arm_biquad_cascade_df1_f32(&lowpass_step, &step_freq, &filtered_step, 1);
jessekaiser 24:c4c5d30a3938 103
jessekaiser 24:c4c5d30a3938 104 if (step_freq < 700) {
jessekaiser 24:c4c5d30a3938 105 Enable = 1; }
jessekaiser 24:c4c5d30a3938 106 else {
jessekaiser 24:c4c5d30a3938 107 Enable = 0;
jessekaiser 24:c4c5d30a3938 108 }
jessekaiser 23:4d050e85e863 109 Step.period(1.0/step_freq);
jessekaiser 23:4d050e85e863 110
jessekaiser 23:4d050e85e863 111 }
jessekaiser 0:3acdd563582f 112 int main()
jessekaiser 0:3acdd563582f 113 {
jessekaiser 25:144eb5822aa7 114 /*Ticker log_timer;
jessekaiser 23:4d050e85e863 115 //set up filters. Use external array for constants
jessekaiser 23:4d050e85e863 116 arm_biquad_cascade_df1_init_f32(&lowpass_pot, 1 , lowpass_const, lowpass_pot_states);
jessekaiser 25:144eb5822aa7 117 log_timer.attach(looper_pot, 0.01);*/
jessekaiser 24:c4c5d30a3938 118
jessekaiser 25:144eb5822aa7 119 Ticker emgtimer;
jessekaiser 25:144eb5822aa7 120 arm_biquad_cascade_df1_init_f32(&lowpass_biceps, 1 , lowpass_const, lowpass_biceps_states);
jessekaiser 25:144eb5822aa7 121 arm_biquad_cascade_df1_init_f32(&highnotch_biceps, 2 , highnotch_const, highnotch_biceps_states);
jessekaiser 25:144eb5822aa7 122 emgtimer.attach(looper_emg, 0.01);
jessekaiser 23:4d050e85e863 123
jessekaiser 23:4d050e85e863 124 Ticker looptimer;
jessekaiser 23:4d050e85e863 125 arm_biquad_cascade_df1_init_f32(&lowpass_step, 1, lowpass1_const, lowpass1_step_states);
jessekaiser 23:4d050e85e863 126 looptimer.attach(looper_motor, 0.01);
jessekaiser 23:4d050e85e863 127
jessekaiser 4:e4341e3524dc 128 MS1 = 1;
jessekaiser 23:4d050e85e863 129 MS2 = 0;
jessekaiser 2:92a63245d11c 130 MS3 = 0;
jessekaiser 24:c4c5d30a3938 131 Step.period(1./step_freq); // 1 kHz, vanaf 2,5 kHz doet de motor het niet meer.
jessekaiser 9:649229691351 132 Step.write(0.5); // Duty cycle van 50%
jessekaiser 23:4d050e85e863 133
jessekaiser 0:3acdd563582f 134 while (1) {
jessekaiser 23:4d050e85e863 135
jessekaiser 23:4d050e85e863 136 if (pot_value1_f32 < 0) { //Directie controle.
jessekaiser 23:4d050e85e863 137 Dir = 0;
jessekaiser 23:4d050e85e863 138 } else {
jessekaiser 23:4d050e85e863 139 Dir = 1;
jessekaiser 23:4d050e85e863 140 }
jessekaiser 24:c4c5d30a3938 141
jessekaiser 25:144eb5822aa7 142 //lcd.printf("Spd %.0f Hz p1 %.4f \n", step_freq, pot_value1_f32); //snelheid meting op lcd
jessekaiser 25:144eb5822aa7 143 pc.printf("filt %.3f raw %.3f \n", filtered_biceps, emg0.read());
jessekaiser 25:144eb5822aa7 144 lcd.printf("filt %.3f raw %.3f \n", filtered_biceps, emg0.read());
jessekaiser 25:144eb5822aa7 145 //pc.printf("Spd %.0f Hz p1 %.4f \n", step_freq, pot_value1_f32); //snelheid meting op lcd
jessekaiser 25:144eb5822aa7 146 wait(0.1);
jessekaiser 23:4d050e85e863 147
jessekaiser 10:7f94cd65c910 148
jessekaiser 0:3acdd563582f 149 }
jessekaiser 0:3acdd563582f 150 }