Diff: main.cpp.orig

Revision:

21:133e9390a42a

Parent:

20:f7d281e3112b

--- a/main.cpp.orig	Mon Sep 29 13:08:57 2014 +0000
+++ /dev/null	Thu Jan 01 00:00:00 1970 +0000
@@ -1,90 +0,0 @@
-#include "mbed.h"
-#include "MODSERIAL.h"
-
-//Define objects
-AnalogIn    emg0(PTB1); //Analog input
-PwmOut      red(LED_RED); //PWM output
-Ticker log_timer;
-MODSERIAL pc(USBTX,USBRX);
-
-typedef struct second_order_constants
-{
-    float b[3];
-    float a[3];
-} second_order_constants_t;
-
-typedef struct second_order_values
-{
-    float x_1,x_2;
-    float y_1,y_2;
-} second_order_values_t;
-
-//constants
-second_order_constants_t highpass= {{0.97803048, -1.95606096,  0.97803048},{1, -1.95557824,  0.95654368}};
-//type for values
-second_order_values_t highpass_values;
-
-float second_order(float x, second_order_constants_t constants, second_order_values_t &values);
-
-
-/** 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;
-    /*put raw emg value both in red and in emg_value*/
-    red.write(emg0.read());      // read float value (0..1 = 0..3.3V)
-    emg_value = emg0.read_u16(); // read direct ADC result, converted to 16 bit integer (0..2^16 = 0..65536 = 0..3.3V)
-    filtered_emg = second_order((float)emg_value,highpass, highpass_values);
-    /*send value to PC. Line below is used to prevent buffer overrun */
-    if(pc.rxBufferGetSize(0)-pc.rxBufferGetCount() > 30)
-        pc.printf("%u\t%f\n",emg_value, filtered_emg);
-    /**When not using the LED, the above could also have been done this way:
-    * pc.printf("%u\n", emg0.read_u16());
-    */
-}
-
-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);
-    /**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, 0.01);
-    while(1) //Loop
-    {
-      /*Empty!*/
-      /*Everything is handled by the interrupt routine now!*/
-    }
-}
-
-float second_order(float x, second_order_constants_t constants, second_order_values_t &values)
-{
-    float y = 0;
-    float b_terms, a_terms;
-    b_terms = (constants.b[0]*x) + (constants.b[1]*values.x_1) + (constants.b[2]*values.x_2);
-    a_terms = (constants.a[1]*values.y_1) + (constants.a[2]*values.y_2);
-    y=(1./constants.a[0])* (b_terms-a_terms);
-    values.x_2 = values.x_1;
-    values.x_1 = x;
-    values.y_2 = values.y_1;
-    values.y_1 = y;
-    return y;
-}
\ No newline at end of file