main.cpp

00001 #include "mbed.h"
00002 
00003 PwmOut speaker(p21);
00004 float frequency = 800;
00005 float wait_time = 1.000; 
00006 InterruptIn boom(p5);
00007 void detonation();
00008     
00009 int main() 
00010 {    
00011     boom.rise(&detonation);
00012     while(1)
00013     {
00014         speaker.period(1.0/(2.0*frequency));
00015         speaker = 0.5;
00016         wait(0.15);
00017         speaker = 0;
00018         wait(0.35);
00019         speaker.period(1.0/(2.0*(frequency + 100)));
00020         speaker = 0.5;
00021         wait(0.15);
00022         speaker = 0;
00023         wait(wait_time);
00024         frequency++;
00025         wait_time = wait_time - 0.002;
00026     }    
00027 }
00028 
00029 void detonation()
00030 {
00031     for(int i = 0; i < 20; i++)
00032     {
00033         speaker.period(1.0/(2.0*frequency + 100));
00034         speaker = 0.5;
00035         wait(0.05);
00036         speaker = 0;
00037         wait(0.02);
00038         speaker.period(1.0/(2.0*(frequency + 100)));
00039         speaker = 0.5;
00040         wait(0.05);
00041         speaker = 0;
00042         wait(0.02);
00043     }
00044         speaker.period(1.0/(2.0*200));
00045         speaker = 0.4;
00046         wait(2);
00047     
00048 }