DFFTeam / Mbed 2 deprecated Esercitazione5_7

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Dependencies:   mbed

main.cpp@0:c3ed03e22b93, 2016-10-31 (annotated)

Committer:
MDevolution
Date:
Mon Oct 31 11:08:54 2016 +0000
Revision:
0:c3ed03e22b93
Game Reaction

Who changed what in which revision?

UserRevisionLine numberNew contents of line
MDevolution 0:c3ed03e22b93 1 /*Program Example 7: Tests reaction time, and demos use of Timer and Timeout functions */
MDevolution 0:c3ed03e22b93 2 #include "mbed.h"
MDevolution 0:c3ed03e22b93 3 #include <stdio.h>
MDevolution 0:c3ed03e22b93 4 #include <stdlib.h> //contains rand() function
MDevolution 0:c3ed03e22b93 5 void measure ();
MDevolution 0:c3ed03e22b93 6 Serial pc(USBTX, USBRX);
MDevolution 0:c3ed03e22b93 7 DigitalOut led1(D5);
MDevolution 0:c3ed03e22b93 8 DigitalOut led4(D6);
MDevolution 0:c3ed03e22b93 9 DigitalIn responseinput(PC_13); //the player hits the switch connected here to respond
MDevolution 0:c3ed03e22b93 10 Timer t; //used to measure the response time
MDevolution 0:c3ed03e22b93 11 Timeout action; //the Timeout used to initiate the response speed test
MDevolution 0:c3ed03e22b93 12
MDevolution 0:c3ed03e22b93 13 int main (){
MDevolution 0:c3ed03e22b93 14 pc.printf("Reaction Time Test\n\r");
MDevolution 0:c3ed03e22b93 15 pc.printf("------------------\n\r");
MDevolution 0:c3ed03e22b93 16 while (1) {
MDevolution 0:c3ed03e22b93 17 int r_delay; //this will be the “random†delay before the led is blinked
MDevolution 0:c3ed03e22b93 18 pc.printf("New Test\n\r");
MDevolution 0:c3ed03e22b93 19 led4=1; //warn that test will start
MDevolution 0:c3ed03e22b93 20 wait(0.2);
MDevolution 0:c3ed03e22b93 21 led4=0;
MDevolution 0:c3ed03e22b93 22 r_delay = rand() % 10 + 1; // generates a pseudorandom number range 1-10
MDevolution 0:c3ed03e22b93 23 pc.printf("random number is %i\n\r", r_delay); // allows test randomness;
MDevolution 0:c3ed03e22b93 24 //removed for normal play
MDevolution 0:c3ed03e22b93 25 action.attach(&measure,r_delay); // set up Timeout to call measure()
MDevolution 0:c3ed03e22b93 26 // after random time
MDevolution 0:c3ed03e22b93 27 wait(10); //test will start within this time, and we then return to it
MDevolution 0:c3ed03e22b93 28 }
MDevolution 0:c3ed03e22b93 29 }
MDevolution 0:c3ed03e22b93 30
MDevolution 0:c3ed03e22b93 31
MDevolution 0:c3ed03e22b93 32 void measure () // called when the led blinks, and measures response time
MDevolution 0:c3ed03e22b93 33 {
MDevolution 0:c3ed03e22b93 34 if (responseinput == 1) { //detect cheating!
MDevolution 0:c3ed03e22b93 35 pc.printf("Do not hold button down!\n");
MDevolution 0:c3ed03e22b93 36 } else {
MDevolution 0:c3ed03e22b93 37 t.start(); //start the timer
MDevolution 0:c3ed03e22b93 38 led1=1; //blink the led
MDevolution 0:c3ed03e22b93 39 wait(0.05);
MDevolution 0:c3ed03e22b93 40 led1=0;
MDevolution 0:c3ed03e22b93 41 while (responseinput==0) {
MDevolution 0:c3ed03e22b93 42 //wait here for response
MDevolution 0:c3ed03e22b93 43 }
MDevolution 0:c3ed03e22b93 44 t.stop(); //stop the timer once response detected
MDevolution 0:c3ed03e22b93 45 pc.printf("Your reaction time was %f seconds\n\r", t.read());
MDevolution 0:c3ed03e22b93 46 t.reset();
MDevolution 0:c3ed03e22b93 47 }
MDevolution 0:c3ed03e22b93 48 }