4 directional EMG control of the XY table. Made during my bachelor end assignment.
Dependencies: C12832_lcd HIDScope mbed-dsp mbed
main.cpp@26:b88ff19ff5dc, 2015-05-11 (annotated)
- Committer:
- jessekaiser
- Date:
- Mon May 11 15:37:58 2015 +0000
- Revision:
- 26:b88ff19ff5dc
- Parent:
- 25:144eb5822aa7
- Child:
- 27:c7b1851c9bb7
Bezig met potmeter filtering, gaat de goede kant op
Who changed what in which revision?
User | Revision | Line number | New 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 | 26:b88ff19ff5dc | 39 | //lowpass filter settings: Fc = 0.5 Hz, Fs = 100 Hz, Gain = -3 dB |
jessekaiser | 26:b88ff19ff5dc | 40 | float lowpass_const[] = {0.06089863257570727, 0, 0, 0.9391013674242927, 0}; |
jessekaiser | 23:4d050e85e863 | 41 | //lowpass for step_freq: Fc = 2 Hz, Fs = 100, Gain = 6 dB |
jessekaiser | 26:b88ff19ff5dc | 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 | 26:b88ff19ff5dc | 102 | //arm_biquad_cascade_df1_f32(&lowpass_step, &step_freq, &filtered_step, 1); |
jessekaiser | 26:b88ff19ff5dc | 103 | |
jessekaiser | 24:c4c5d30a3938 | 104 | if (step_freq < 700) { |
jessekaiser | 26:b88ff19ff5dc | 105 | Enable = 1; |
jessekaiser | 26:b88ff19ff5dc | 106 | } else { |
jessekaiser | 26:b88ff19ff5dc | 107 | Enable = 0; |
jessekaiser | 26:b88ff19ff5dc | 108 | } |
jessekaiser | 23:4d050e85e863 | 109 | Step.period(1.0/step_freq); |
jessekaiser | 26:b88ff19ff5dc | 110 | |
jessekaiser | 23:4d050e85e863 | 111 | } |
jessekaiser | 0:3acdd563582f | 112 | int main() |
jessekaiser | 0:3acdd563582f | 113 | { |
jessekaiser | 26:b88ff19ff5dc | 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 | 26:b88ff19ff5dc | 117 | log_timer.attach(looper_pot, 0.01); |
jessekaiser | 26:b88ff19ff5dc | 118 | |
jessekaiser | 26:b88ff19ff5dc | 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 | 26:b88ff19ff5dc | 122 | emgtimer.attach(looper_emg, 0.002);*/ |
jessekaiser | 23:4d050e85e863 | 123 | |
jessekaiser | 23:4d050e85e863 | 124 | Ticker looptimer; |
jessekaiser | 26:b88ff19ff5dc | 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 | 26:b88ff19ff5dc | 131 | Step.period(1./step_freq); |
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 | 26:b88ff19ff5dc | 141 | |
jessekaiser | 26:b88ff19ff5dc | 142 | lcd.printf("Raw %.4f Hz Filt %.4f \n", Pot1.read(), filtered_pot); //snelheid meting op lcd |
jessekaiser | 26:b88ff19ff5dc | 143 | //pc.printf(" %.4f \n", Pot1.read()); |
jessekaiser | 26:b88ff19ff5dc | 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 | 26:b88ff19ff5dc | 146 | wait(0.01); |
jessekaiser | 23:4d050e85e863 | 147 | |
jessekaiser | 10:7f94cd65c910 | 148 | |
jessekaiser | 0:3acdd563582f | 149 | } |
jessekaiser | 26:b88ff19ff5dc | 150 | } |