Diff: EMGmeten.cpp

Revision:

0:b68a6d0451b8

Child:

1:b7a9fcf50776

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/EMGmeten.cpp	Tue Oct 28 14:23:05 2014 +0000
@@ -0,0 +1,47 @@
+#include "mbed.h"
+#include "HIDScope.h"
+
+#include "arm_math.h"
+
+AnalogIn    emg(PTB1); //Analog input
+HIDScope scope(2);
+
+arm_biquad_casd_df1_inst_f32 lowpass;
+arm_biquad_casd_df1_inst_f32 highpass; 
+float lowpass_const[] = {0.978030479206560 , 1.956060958413119  , 0.978030479206560 , -1.955578240315036 , -0.956543676511203};
+float lowpass_states[4];
+float highpass_const[] = {0.638945525159022, -1.277891050318045,  0.638945525159022 , 1.142980502539901 , -0.412801598096189};
+float highpass_states[4];
+
+void looper()
+{
+    uint16_t emg_value;
+    float filtered_emg;
+    float emg_value_f32;
+    emg_value = emg.read_u16(); // read direct ADC result, converted to 16 bit integer (0..2^16 = 0..65536 = 0..3.3V)
+    emg_value_f32 = emg.read();
+    
+    arm_biquad_cascade_df1_f32(&highpass, &emg_value_f32, &filtered_emg, 1 );
+    arm_biquad_cascade_df1_f32(&lowpass, &filtered_emg, &filtered_emg, 1 );
+    
+    scope.set(0,emg_value);     //uint value
+    scope.set(1,filtered_emg);  //processed float
+    scope.send();
+}
+
+int main()
+{
+    Ticker log_timer;
+    
+    arm_biquad_cascade_df1_init_f32(&lowpass,1 , lowpass_const, lowpass_states);
+    arm_biquad_cascade_df1_init_f32(&highpass,1 , highpass_const, highpass_states);
+    
+    log_timer.attach(looper, 0.005);
+    
+    while(1) //Loop
+    {
+      /*Empty!*/
+      /*Everything is handled by the interrupt routine now!*/
+    }
+}
+    
\ No newline at end of file