Met de correcte libraries

Dependencies:   HIDScope mbed

Fork of EMG by Tom Tom



File content as of revision 12:768048d7f742:

#include "mbed.h"
#include "MODSERIAL.h"

//Define objects
AnalogIn    emg0(PTB1); //Analog input
PwmOut      red(LED_RED); //PWM output
Ticker log_timer;

/** 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;
    /*put raw emg value both in red and in emg_value*/
    red.write(;      // 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)
    /*send value to PC. Line below is used to prevent buffer overrun */
    if(pc.rxBufferGetSize(0)-pc.rxBufferGetCount() > 30)
    /**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*/
    /*set the period for the PWM to the red LED*/
    /**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
      /*Everything is handled by the interrupt routine now!*/