Projectgroep 20 Biorobotics / Mbed 2 deprecated EMG

Script voor het weergeven van 1 EMG signaal met behulp van een OLIMEX shield. Let hierbij goed op dat je de juiste pinnetjes op het OLIMEX shield verbonden hebt, in dit geval A0 als uitgang. Verder maken we gebruik van 3,3 Volt!

Dependencies:   HIDScope mbed

Fork of EMG by Tom Tom

main.cpp@11:ce72ec658a95, 2014-09-11 (annotated)

Committer:
vsluiter
Date:
Thu Sep 11 07:16:24 2014 +0000
Revision:
11:ce72ec658a95
Parent:
10:09b8424a7b39
Child:
13:18d4cef1fdb4
Added HID Scope stuff

Who changed what in which revision?

UserRevisionLine numberNew contents of line
vsluiter 0:32bb76391d89 1 #include "mbed.h"
vsluiter 6:80c13d99aa55 2 #include "MODSERIAL.h"
vsluiter 11:ce72ec658a95 3 #include "HIDScope.h"
vsluiter 0:32bb76391d89 4
vsluiter 4:8b298dfada81 5 //Define objects
vsluiter 7:3396c3e33928 6 AnalogIn emg0(PTB1); //Analog input
ArvidKeemink 1:db54d9412d18 7 PwmOut red(LED_RED); //PWM output
vsluiter 8:8a17f65622b4 8 Ticker log_timer;
vsluiter 8:8a17f65622b4 9 MODSERIAL pc(USBTX,USBRX);
vsluiter 11:ce72ec658a95 10 HIDScope scope(2);
vsluiter 2:e314bb3b2d99 11
vsluiter 4:8b298dfada81 12 /** Looper function
vsluiter 4:8b298dfada81 13 * functions used for Ticker and Timeout should be of type void <name>(void)
vsluiter 4:8b298dfada81 14 * i.e. no input arguments, no output arguments.
vsluiter 4:8b298dfada81 15 * if you want to change a variable that you use in other places (for example in main)
vsluiter 4:8b298dfada81 16 * you will have to make that variable global in order to be able to reach it both from
vsluiter 4:8b298dfada81 17 * the function called at interrupt time, and in the main function.
vsluiter 4:8b298dfada81 18 * To make a variable global, define it under the includes.
vsluiter 4:8b298dfada81 19 * variables that are changed in the interrupt routine (written to) should be made
vsluiter 4:8b298dfada81 20 * 'volatile' to let the compiler know that those values may change outside the current context.
vsluiter 8:8a17f65622b4 21 * i.e.: "volatile uint16_t emg_value;" instead of "uint16_t emg_value"
vsluiter 4:8b298dfada81 22 * in the example below, the variable is not re-used in the main function, and is thus declared
vsluiter 4:8b298dfada81 23 * local in the looper function only.
vsluiter 4:8b298dfada81 24 **/
vsluiter 2:e314bb3b2d99 25 void looper()
vsluiter 2:e314bb3b2d99 26 {
vsluiter 4:8b298dfada81 27 /*variable to store value in*/
vsluiter 8:8a17f65622b4 28 uint16_t emg_value;
vsluiter 4:8b298dfada81 29 /*put raw emg value both in red and in emg_value*/
vsluiter 10:09b8424a7b39 30 red.write(emg0.read()); // read float value (0..1 = 0..3.3V)
vsluiter 8:8a17f65622b4 31 emg_value = emg0.read_u16(); // read direct ADC result (0..4096 = 0..3.3V)
vsluiter 8:8a17f65622b4 32 /*send value to PC. Line below is used to prevent buffer overrun */
vsluiter 6:80c13d99aa55 33 if(pc.rxBufferGetSize(0)-pc.rxBufferGetCount() > 30)
vsluiter 8:8a17f65622b4 34 pc.printf("%u\n",emg_value);
vsluiter 11:ce72ec658a95 35 scope.set(0,emg_value);
vsluiter 11:ce72ec658a95 36 scope.set(1,red.read());
vsluiter 11:ce72ec658a95 37 scope.send();
vsluiter 5:4dacb7b72109 38 /**When not using the LED, the above could also have been done this way:
vsluiter 8:8a17f65622b4 39 * pc.printf("%u\n", emg0.read_u16());
vsluiter 5:4dacb7b72109 40 */
vsluiter 2:e314bb3b2d99 41 }
vsluiter 0:32bb76391d89 42
vsluiter 0:32bb76391d89 43 int main()
vsluiter 0:32bb76391d89 44 {
vsluiter 4:8b298dfada81 45 /*setup baudrate. Choose the same in your program on PC side*/
vsluiter 2:e314bb3b2d99 46 pc.baud(115200);
vsluiter 4:8b298dfada81 47 /*set the period for the PWM to the red LED*/
vsluiter 2:e314bb3b2d99 48 red.period_ms(2);
vsluiter 4:8b298dfada81 49 /**Here you attach the 'void looper(void)' function to the Ticker object
vsluiter 9:d33e7b175ad7 50 * The looper() function will be called every 0.01 seconds.
vsluiter 4:8b298dfada81 51 * Please mind that the parentheses after looper are omitted when using attach.
vsluiter 4:8b298dfada81 52 */
vsluiter 8:8a17f65622b4 53 log_timer.attach(looper, 0.01);
ArvidKeemink 1:db54d9412d18 54 while(1) //Loop
vsluiter 0:32bb76391d89 55 {
vsluiter 4:8b298dfada81 56 /*Empty!*/
vsluiter 4:8b298dfada81 57 /*Everything is handled by the interrupt routine now!*/
vsluiter 0:32bb76391d89 58 }
vsluiter 0:32bb76391d89 59 }