2 losse EMG signalen van de biceps en deltoid
Dependencies: HIDScope MODSERIAL mbed-dsp mbed Encoder
Fork of Lampje_EMG_Gr6 by
Diff: main.cpp
- Revision:
- 0:db396b9f4b4c
- Child:
- 1:099b19376f16
diff -r 000000000000 -r db396b9f4b4c main.cpp --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/main.cpp Wed Oct 15 14:07:03 2014 +0000 @@ -0,0 +1,171 @@ +#include "mbed.h" +#include "HIDScope.h" +#include "arm_math.h" +#include "MODSERIAL.h" + +Serial pc(USBTX, USBRX); // tx, rx +DigitalOut myled1(LED_RED); +DigitalOut myled2(LED_GREEN); +DigitalOut myled3(LED_BLUE); +PwmOut filtered_emg(PTD4); + +//Define objects +AnalogIn emg0(PTB1); //Analog input +HIDScope scope(2); + +arm_biquad_casd_df1_inst_f32 lowpass; +//constants for 5Hz lowpass +float lowpass_const[] = {0.8005910266528647, 1.6011820533057295, 0.8005910266528647, -1.5610153912536877, -0.6413487153577715}; +//state values +float lowpass_states[4]; +arm_biquad_casd_df1_inst_f32 highpass; +//constants for 0.5Hz highpass +float highpass_const[] = {0.956542835577484, -1.913085671154968, 0.956542835577484, 1.911196288237583, -0.914975054072353}; +//state values +float highpass_states[4]; + + +/** Looper function +* functions used for Ticker and Timeout should be of type void <name>(void) +* i.e. no input arguments, no output arguments. +* if you want to change a variable that you use in other places (for example in main) +* you will have to make that variable global in order to be able to reach it both from +* the function called at interrupt time, and in the main function. +* To make a variable global, define it under the includes. +* variables that are changed in the interrupt routine (written to) should be made +* 'volatile' to let the compiler know that those values may change outside the current context. +* i.e.: "volatile uint16_t emg_value;" instead of "uint16_t emg_value" +* in the example below, the variable is not re-used in the main function, and is thus declared +* local in the looper function only. +**/ +void looper() +{ + /*variable to store value in*/ + uint16_t emg_value; + float filtered_emg; + float emg_value_f32; + /*put raw emg value both in red and in emg_value*/ + emg_value = emg0.read_u16(); // read direct ADC result, converted to 16 bit integer (0..2^16 = 0..65536 = 0..3.3V) + emg_value_f32 = emg0.read(); + + //process emg + arm_biquad_cascade_df1_f32(&highpass, &emg_value_f32, &filtered_emg, 1 ); + filtered_emg = fabs(filtered_emg); + arm_biquad_cascade_df1_f32(&lowpass, &filtered_emg, &filtered_emg, 1 ); + + /*send value to PC. */ + scope.set(0,emg_value); //uint value + scope.set(1,filtered_emg); //processed float + scope.send(); + +} + +void BlinkRed(int n) +{ + for (int i=0; i<n; i++) { + myled1 = 1; + myled2 = 1; + myled3 = 1; + wait(1); + myled1 = 0; + myled2 = 1; + myled3 = 1; + wait(1); + } +} + +int main() +{ + pc.baud(115200); + + Ticker log_timer; + //set up filters. Use external array for constants + arm_biquad_cascade_df1_init_f32(&lowpass,1 , lowpass_const, lowpass_states); + arm_biquad_cascade_df1_init_f32(&highpass,1 ,highpass_const,highpass_states); + + /**Here you attach the 'void looper(void)' function to the Ticker object + * The looper() function will be called every 0.01 seconds. + * Please mind that the parentheses after looper are omitted when using attach. + */ + log_timer.attach(looper, 0.001); + while(1) //Loop + { + /*Empty!*/ + /*Everything is handled by the interrupt routine now!*/ + { + char c = '0'; + while(1) { + pc.printf("Het programma blijft knipperen totdat er op '1' wordt gedrukt.\n"); + do { + myled1 = 1; + myled2 = 1; + myled3 = 1; + wait(1); + myled1 = 1; + myled2 = 0; + myled3 = 1; + wait(1); + if(pc.readable()) { + c = pc.getc(); + } + } while(filtered_emg < 0.04); + //c = pc.getc(); + while(filtered_emg.read() > 0.04) { //Wanneer er op 1 wordt gedrukt gaat het lampje rood knipperen + c = '0'; + BlinkRed(2); + + if (pc.readable()) { //Wanneer er binnen de vastgestelde tijd weer op 1 wordt gedrukt, gaat het lampje blauw knipperen, anders reset. + c = pc.getc(); + c = '0'; + myled1 = 1; + myled2 = 1; + myled3 = 1; + wait(1); + myled1 = 1; + myled2 = 1; + myled3 = 0; + wait(1); + myled1 = 1; + myled2 = 1; + myled3 = 1; + wait(1); + myled1 = 1; + myled2 = 1; + myled3 = 0; + wait(1);} + else if (c != '1') { + break; } + + if(pc.readable()) { + c = pc.getc(); + myled1 = 1; + myled2 = 0; + myled3 = 1; + wait(5); //Dit wordt de duur van het slaan en teruggaan naar de beginpositie totdat er opnieuw gemeten kan worden. + c = '0'; + } + } + } + } + } +} + +int i; + +int a(void) +{ + i=22; + return i; +} + +void b (void) +{ + int i; + + i=66; + int j = a(); + pc.print(i); + } + +b(); + \ No newline at end of file