Diff: main.cpp

Revision:

0:3843c26cd5fd

Child:

1:3687c7cb0648

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp	Thu Oct 17 08:29:57 2013 +0000
@@ -0,0 +1,89 @@
+#include "mbed.h"
+#include "MODSERIAL.h"
+
+//Define objects
+AnalogIn    emg_biceps(PTB0); //Analog input
+PwmOut      red(LED_RED); // EMG meting
+// PwmOut      blue(LED_BLUE); // uitgangssignaal controle
+// PwmOut      green(LED_GREEN); 
+
+Ticker timer;
+MODSERIAL pc(USBTX,USBRX,64,1024);
+
+#define gain_biceps 1
+#define maxcount 50
+
+#define NUM0 0.8841 // constante
+#define NUM1 -3.53647 // z^-1
+#define NUM2 5.3046 // z^-2etc.
+#define NUM3 -3.5364
+#define NUM4 0.8841
+
+#define DEN0 1 // constante
+#define DEN1 -3.7538
+#define DEN2 5.2912
+#define DEN3 -3.3189
+#define DEN4 0.7816
+
+/* hou in de gaten welke waarden globaal gedefinieerd moeten worden*/ 
+float count; float square_biceps; float sum_biceps; float mean_biceps;
+
+void looper()
+{
+    /*value0 is huidig, 1 is t-1, 2 is t-2 etc. Gebruik later aanduidingen ABCD. */   
+    char startup = 0; float mean;
+    float sig_out_biceps;
+    float in0; float in1; float in2; float in3; float in4;
+    float out0; float out1; float out2; float out3; float out4;
+    
+    if (startup != 1) 
+        {in0 = 0; in1 = 0; in2 = 0; in3 = 0; in4 = 0;
+        out0 = 0; out1 = 0; out2 = 0; out3 = 0; out4 = 0;
+        count = 0; square_biceps = 0; sum_biceps = 0; mean_biceps = 0.2; startup = 1;}
+    in4 = in3; in3 = in4; in3 = in2; in2 = in1; in1 = in0;
+    in0 = emg_biceps.read();
+    red = in0;
+    /* rode led aan voor meting emg*/ 
+    out4 = out3; out3 = out2; out2 = out1; out1 = out0;
+    out0 = (NUM0*in0 + NUM1*in1 + NUM2*in2 + NUM3*in3 + NUM4*in4 - DEN1*out1 - DEN2*out2 - DEN3*out3 - DEN4*out4 ) / DEN0;
+       
+    /*send value to PC. use 6 digits after decimal sign*/
+    //if(pc.rxBufferGetSize(0)-pc.rxBufferGetCount() > 30) // ! Testen filter: gebruik de if om de serial optimaal te gebruiken.
+        //pc.printf("%.6f\n",emg_out_biceps);
+    /**When not using the LED, the above could also have been done this way:
+    * pc.printf("%.6\n", emg0.read());
+    */
+    float emg_abs; // square, mean en count eerder gedefinieerd
+    emg_abs = fabs(out0);
+    mean = mean_biceps;
+    sum_biceps += out0;
+    square_biceps += (emg_abs - mean)*(emg_abs - mean); //neem absolute waarde, kwadrateer, voeg toe aan vorige square
+    // voeg rest EMG's toe, variabelen alleen _spier geven als het nodig is.
+    count += 1; // hou bij hoeveel squares er zijn opgeteld
+    if (count >= maxcount)
+        {   sig_out_biceps = sqrt(square_biceps/count);
+            mean_biceps = sum_biceps/count;
+            count= 0; square_biceps = 0; sum_biceps = 0; // en neem de RMS als er genoeg zijn geteld, stuur die door, en reset sqaure en count
+            if(pc.rxBufferGetSize(0)-pc.rxBufferGetCount() > 30)
+                pc.printf("%.6f\n",sig_out_biceps);
+         }
+}
+
+int main()
+{
+    /*setup baudrate. Choose the same in your program on PC side*/
+    pc.baud(115200);
+    /*set the period for the PWM to the red LED*/
+    red.period_ms(2); // periode pwm = 2*Fs , blijkbaar.
+    // blue.period_ms(2);
+    /**Here you attach the 'void looper(void)' function to the Ticker object0
+    * The looper() function will be called every 0.001 seconds.
+    * Please mind that the parentheses after looper are omitted when using attach.
+    */ 
+    timer.attach(looper, 0.001);
+    while(1) // Loop
+    {   
+            // blue = sig_out_biceps;
+        
+    }
+}