Diff: main.cpp

Revision:

0:a2ded96ce136

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp	Tue Dec 02 15:21:13 2014 +0000
@@ -0,0 +1,126 @@
+#include "mbed.h"
+#include "PinDetect.h"
+#include "SDFileSystem.h"
+#include <vector>
+#include <string>
+#include "wave_player.h"
+
+DigitalOut myled(LED1);
+PwmOut alarm(p22);
+AnalogOut DACout(p18);
+PinDetect snooze(p23);
+PinDetect stop(p24);
+SDFileSystem sd(p5, p6, p7, p8, p12, "sd"); //SD card
+
+
+volatile bool t = true;
+volatile bool play = true;
+ volatile float vol = .52;
+ volatile bool insert;
+ volatile int index;
+wave_player waver(&DACout);
+int num = 0;
+vector<string> filenames; //filenames are stored in a vector string
+
+void read_file_names(char *dir)
+{
+    DIR *dp;
+    struct dirent *dirp;
+    dp = opendir(dir);
+    //read all directory and file names in current directory into filename vector
+    while((dirp = readdir(dp)) != NULL) {
+        filenames.push_back(string(dirp->d_name));
+        num++;
+    }
+    num= num;
+}
+
+void snooze_hit_callback(void) {
+    alarm = 0.0;
+    wait(20);
+    if (insert == true) {
+        play =! play;
+        wait(20);
+        play =! play;
+    }
+}
+
+void stop_hit_callback(void){
+    //alarm = 0.0;
+    //state = off;
+    myled = 1;
+   vol = 0.0;
+   //wait(1000);
+   t = false;
+   if (insert == true){
+       play =! play;
+       }
+}
+int main() {
+snooze.mode(PullUp);
+stop.mode(PullUp);
+//pb3.mode(PullUp);
+
+//Delay for initial pullup to take effect
+wait(.01);
+
+//Setup Interrupt callback functions for a pb hit
+snooze.attach_deasserted(&snooze_hit_callback);
+stop.attach_deasserted(&stop_hit_callback);
+//pb3.attach_deasserted(&pb3_hit_callback);
+
+//Start sampling pb inputs using interrupts
+snooze.setSampleFrequency(); //default is 20KHz sampling
+stop.setSampleFrequency(); 
+//pb3.setSampleFrequency();
+//pushbuttons now setup and running
+    
+
+while(t == true) {
+     insert = sd.SD_inserted();
+    if ((insert == true) && (play ==true)) {
+            read_file_names("/sd/myMusic");
+            //string str2 = filenames[index].substr(0,filenames[index].length()-4);
+            FILE *wave_file;
+            string filepath = "/sd/mymusic/";
+            wave_file = fopen( (filepath+filenames[index]).c_str(), "r");
+            waver.play(wave_file, &play);
+           if (feof(wave_file)) // when playback ends file will close and play will equal false
+            {
+            fclose(wave_file);
+            //play=!play;
+            } 
+             
+             myled != myled;
+        }
+    if ((insert == false)&&(play == true)) {
+        // generate a 500Hz tone using PWM hardware output
+    
+        for (int j=0; j<26; j=j+2) {
+            alarm.period(1.0/500.0); // 500hz period
+            alarm =vol; //50% duty cycle - max volume
+            wait(.5);
+            //alarm=0.0; // turn off audio
+            alarm.period(0.0/500.0);
+            wait(.5);
+            } // end of for
+    
+        // two tone police siren effect -  two periods or two frequencies
+        // increase volume - by changing the PWM duty cycle
+        for (int i=0; i<26; i=i+2) {
+            alarm = vol;
+            alarm.period(1.0/969.0);
+            wait(.5);
+            alarm.period(1.0/800.0);
+            wait(.5);
+          } //end of for
+    
+        //alarm = 0.0;
+    } //end of if
+
+}// end of while
+    while (t == false) {
+        alarm = 0.0;
+        //fclose(wave_file);
+        }
+}// end of main