Sakis Kasampalis / Mbed 2 deprecated cricket

Cricket (insect) emulation

Dependencies:   mbed

Fork of talking by Sakis Kasampalis

cricket.cpp@2:c6c74e788985, 2017-02-11 (annotated)

Committer:
faif
Date:
Sat Feb 11 15:45:54 2017 +0000
Revision:
2:c6c74e788985
Parent:
talking.cpp@1:91104d67b0af
Child:
3:1b91d910dabd
Cricket (animal) emulation

Who changed what in which revision?

UserRevisionLine numberNew contents of line
faif 0:17458f91a0e9 1 #include "mbed.h"
faif 2:c6c74e788985 2 #include "cricket.h"
faif 0:17458f91a0e9 3
faif 0:17458f91a0e9 4 enum
faif 0:17458f91a0e9 5 {
faif 0:17458f91a0e9 6 OFF = 0,
faif 0:17458f91a0e9 7 ON = 1
faif 0:17458f91a0e9 8 };
faif 0:17458f91a0e9 9
faif 0:17458f91a0e9 10 enum { MaxWavValue = 255 };
faif 0:17458f91a0e9 11
faif 2:c6c74e788985 12 static const float ticker_rhythm = 10E-5; // 9.766 kHz sample rate (1/9766 sec delay)
faif 2:c6c74e788985 13 static const char clip_path[] = "/local/cricket.wav";
faif 0:17458f91a0e9 14
faif 0:17458f91a0e9 15
faif 0:17458f91a0e9 16 bool done = false;
faif 0:17458f91a0e9 17
faif 0:17458f91a0e9 18
faif 0:17458f91a0e9 19 void myrhythm()
faif 0:17458f91a0e9 20 {
faif 0:17458f91a0e9 21 done = true;
faif 0:17458f91a0e9 22 }
faif 0:17458f91a0e9 23
faif 0:17458f91a0e9 24 int main ()
faif 0:17458f91a0e9 25 {
faif 2:c6c74e788985 26 const int size = 1165; // 32K max in total (~30K is enough for testing)
faif 0:17458f91a0e9 27 char clip[size];
faif 0:17458f91a0e9 28
faif 0:17458f91a0e9 29 waitForButton(led, button);
faif 0:17458f91a0e9 30 preloadFile(clip, size, clip_path);
faif 0:17458f91a0e9 31
faif 0:17458f91a0e9 32 rhythm.attach(&myrhythm, ticker_rhythm);
faif 0:17458f91a0e9 33
faif 0:17458f91a0e9 34 while (true)
faif 0:17458f91a0e9 35 {
faif 0:17458f91a0e9 36 playSound(clip, size, headphones);
faif 2:c6c74e788985 37 randomPause();
faif 0:17458f91a0e9 38 }
faif 0:17458f91a0e9 39 }
faif 0:17458f91a0e9 40
faif 0:17458f91a0e9 41 void waitForButton(DigitalOut& led, DigitalIn& button)
faif 0:17458f91a0e9 42 {
faif 0:17458f91a0e9 43 led = ON;
faif 0:17458f91a0e9 44 while (!button) {};
faif 0:17458f91a0e9 45 led = OFF;
faif 0:17458f91a0e9 46 }
faif 0:17458f91a0e9 47
faif 0:17458f91a0e9 48 void preloadFile(char* clip, int size, const char* path)
faif 0:17458f91a0e9 49 {
faif 0:17458f91a0e9 50 FILE* file = fopen(path, "r");
faif 0:17458f91a0e9 51 for (int i = 0; i != size; ++i)
faif 2:c6c74e788985 52 {
faif 0:17458f91a0e9 53 clip[i] = fgetc(file);
faif 2:c6c74e788985 54 }
faif 0:17458f91a0e9 55 fclose(file);
faif 0:17458f91a0e9 56 }
faif 0:17458f91a0e9 57
faif 0:17458f91a0e9 58 void playSound(char* clip, int size, AnalogOut& headphones)
faif 0:17458f91a0e9 59 {
faif 0:17458f91a0e9 60 for (int i= 0; i != size; ++i)
faif 0:17458f91a0e9 61 {
faif 0:17458f91a0e9 62 while (!done) {};
faif 0:17458f91a0e9 63 done = false;
faif 0:17458f91a0e9 64 headphones = float(clip[i]) / MaxWavValue;
faif 0:17458f91a0e9 65 }
faif 0:17458f91a0e9 66 }
faif 2:c6c74e788985 67
faif 2:c6c74e788985 68 void randomPause()
faif 2:c6c74e788985 69 {
faif 2:c6c74e788985 70 float c = rand() % 100;
faif 2:c6c74e788985 71 // 30% percentage to wait 2 sec
faif 2:c6c74e788985 72 if (c > 70)
faif 2:c6c74e788985 73 {
faif 2:c6c74e788985 74 wait(2);
faif 2:c6c74e788985 75 }
faif 2:c6c74e788985 76 // 70% percentage to wait 0-1 sec
faif 2:c6c74e788985 77 else
faif 2:c6c74e788985 78 {
faif 2:c6c74e788985 79 wait(c / 100);
faif 2:c6c74e788985 80 }
faif 2:c6c74e788985 81 }