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Werkend EMG script
Dependencies: HIDScope MODSERIAL biquadFilter mbed
Fork of EMG by
main.cpp
- Committer:
- vsluiter
- Date:
- 2013-10-03
- Revision:
- 6:80c13d99aa55
- Parent:
- 5:4dacb7b72109
- Child:
- 7:3396c3e33928
File content as of revision 6:80c13d99aa55:
#include "mbed.h" #include "MODSERIAL.h" //Define objects AnalogIn emg0(PTB0); //Analog input PwmOut red(LED_RED); //PWM output Ticker timer; MODSERIAL pc(USBTX,USBRX,64,1024); /** 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 float emg_value;" instead of "float 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*/ float emg_value; /*put raw emg value both in red and in emg_value*/ red = emg_value = emg0.read(); /*send value to PC. use 6 digits after decimal sign*/ if(pc.rxBufferGetSize(0)-pc.rxBufferGetCount() > 30) pc.printf("%.6f\n",emg_value); /**When not using the LED, the above could also have been done this way: * pc.printf("%.6\n", emg0.read()); */ } 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 0.001 seconds. * Please mind that the parentheses after looper are omitted when using attach. */ timer.attach(looper, 0.001); while(1) //Loop { /*Empty!*/ /*Everything is handled by the interrupt routine now!*/ } }