Diff: main.cpp

Revision:

0:db396b9f4b4c

Child:

1:099b19376f16

--- /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