Diff: main.cpp

Revision:

0:69e13b99ec01

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp	Sun Aug 11 09:41:33 2019 +0000
@@ -0,0 +1,218 @@
+#include "mbed.h"
+#include "SDFileSystem.h"
+#include "wave_player.h"
+#include "PinDetect.h"
+#include <vector>
+#include <string>
+
+#define UP PC_13
+#define DOWN PB_1
+#define BACK PB_5
+#define MENU PB_2
+#define SELECT PB_9
+#define VOLUP PB_7
+#define VOLDOWN PB_6
+
+#define LONG_PRESS_TIME 80 //Value * 20ms = debounce time
+#define SHORT_PRESS_TIME 5 //Value * 20ms = debounce time
+
+using namespace std;
+
+SDFileSystem sd(PB_15, PB_14, PB_13, PB_12, "TEST");
+
+PinDetect up(UP, PullUp);
+PinDetect down(DOWN, PullUp);
+PinDetect back(BACK, PullUp);
+PinDetect menu(MENU, PullUp);
+PinDetect select(SELECT, PullUp);
+PinDetect volup(VOLUP, PullUp);
+PinDetect voldown(VOLDOWN, PullUp);
+bool buttonStatus = 0;
+
+AnalogOut DACout(PA_4);
+wave_player waver(&DACout);
+int pos = 0; // index of the song
+int vol = 0; // volume controller
+
+bool playing = false; //variable for pause/play since we only have 1 pb for that
+vector<string> filenames; //filenames are stored in a vector string
+
+void read_file_names(char *dir) // function that reads in file names from sd cards
+{
+    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));
+    }
+}
+
+void  upPressedCallback(void){
+    //printf("\nUP Pressed\n");
+    
+    int l = filenames.size();
+    if (pos > 0) {
+        pos--;
+    } else if (pos == 0 ) {
+        pos = l-1;
+    }
+    
+}
+void  upHeldCallback(void){
+    printf("\nUP Held\n");
+}
+
+void  downPressedCallback(void){
+    //printf("\ndown Pressed\n");
+    // it checks for the total number of songs in the sd card..then increments the index until it reaches the last one, then resets to 0
+    
+    int l = filenames.size();
+    if (pos < (l-1)) {
+        pos++;
+    } else if (pos == (l-1)) {
+        pos = 0;
+    }
+    
+}
+void  downHeldCallback(void){
+    printf("\ndown Held\n");
+}
+
+void  backPressedCallback(void){
+    printf("\nback Pressed\n");
+}
+void  backHeldCallback(void){
+    printf("\nback Held\n");
+}
+
+void  menuPressedCallback(void){
+    //printf("\nmenu Pressed\n");
+
+    //this interrupt handler changes the play to pause mode or vice versa
+    //this is done using the boolean playing
+    
+    if (playing == false) {
+        playing = true; 
+    } else if (playing == true) {
+        playing = false; 
+    }
+    
+}
+void  menuHeldCallback(void){
+    //printf("\nmenu Held\n");
+}
+
+void  volupPressedCallback(void){
+    printf("\nvolup Pressed\n");
+}
+void  volupHeldCallback(void){
+    printf("\nvolup Held\n");
+}
+
+void  voldownPressedCallback(void){
+    //printf("\nvoldown Pressed\n");
+    // this pb changes the volume by lowering the volume until it reaches 0. then it resets to the max volume
+    // the volume range has been divided into 16 possible ranges. and hence, it toggles through those 16 values
+    // this only changes the variable vol, which is then used in the wave player file to actually adjust the volume
+    vol = (vol+1) % 16;
+}
+void  voldownHeldCallback(void){
+    printf("\nvoldown Held\n");
+}
+
+bool buttons_init(void) {
+    up.attach_deasserted( &upPressedCallback );
+    //up.attach_deasserted( &upReleasedCallback );
+    up.attach_asserted_held( &upHeldCallback );
+    up.setSamplesTillAssert( SHORT_PRESS_TIME );
+    up.setSamplesTillHeld( LONG_PRESS_TIME );
+    up.setAssertValue( 0 );
+    up.setSampleFrequency();
+    //up.fall(callback(this, &upCallback));
+    
+    down.attach_deasserted( &downPressedCallback );
+    //down.attach_deasserted( &downReleasedCallback );
+    down.attach_asserted_held( &downHeldCallback );
+    down.setSamplesTillAssert( SHORT_PRESS_TIME );
+    down.setSamplesTillHeld( LONG_PRESS_TIME );
+    down.setAssertValue( 0 );
+    down.setSampleFrequency();
+    
+    back.attach_deasserted( &backPressedCallback );
+    //back.attach_deasserted( &backReleasedCallback );
+    back.attach_asserted_held( &backHeldCallback );
+    back.setSamplesTillAssert( SHORT_PRESS_TIME );
+    back.setSamplesTillHeld( LONG_PRESS_TIME );
+    back.setAssertValue( 0 );
+    back.setSampleFrequency();
+    
+    menu.attach_deasserted( &menuPressedCallback );
+    //menu.attach_deasserted( &menuReleasedCallback );
+    menu.attach_asserted_held( &menuHeldCallback );
+    menu.setSamplesTillAssert( SHORT_PRESS_TIME );
+    menu.setSamplesTillHeld( LONG_PRESS_TIME );
+    menu.setAssertValue( 0 );
+    menu.setSampleFrequency();
+
+    volup.attach_deasserted( &volupPressedCallback );
+    //volup.attach_deasserted( &volupReleasedCallback );
+    volup.attach_asserted_held( &volupHeldCallback );
+    volup.setSamplesTillAssert( SHORT_PRESS_TIME );
+    volup.setSamplesTillHeld( LONG_PRESS_TIME );
+    volup.setAssertValue( 0 );
+    volup.setSampleFrequency();
+    
+    voldown.attach_deasserted( &voldownPressedCallback );
+    //voldown.attach_deasserted( &voldownReleasedCallback );
+    voldown.attach_asserted_held( &voldownHeldCallback );
+    voldown.setSamplesTillAssert( SHORT_PRESS_TIME );
+    voldown.setSamplesTillHeld( LONG_PRESS_TIME );
+    voldown.setAssertValue( 0 );
+    voldown.setSampleFrequency();
+    
+    /*
+    down.fall(callback(&downCallback));
+    back.fall(callback(&backCallback));
+    menu.fall(callback(&menuCallback));
+    select.fall(callback(&selectCallback));
+    volup.fall(callback(&volupCallback));
+    voldown.fall(callback(&voldownCallback));
+    */
+    
+    printf("\nButtons Initialized\n");
+    return 1;
+}
+
+int main()
+{
+    printf("\n\n\nHello, wave world =======!\n");
+    buttonStatus = buttons_init();
+    read_file_names("/TEST/Music");
+    
+    /*
+    //FILE *wave_file;
+    //wave_file=fopen("/TEST/queen.wav","r");
+    //wave_player waver(&DACout, wave_file);
+    //waver.play();
+    
+    wave_file=fopen("/TEST/queen.wav","r");
+    waver.play();
+    fclose(wave_file);
+    */
+    
+    while(1) {
+        //while pb3 is low, then we can start playing the song
+        while(playing == true) { //we have 2 while loops..one while loop makes sure the music player is always on, the other one is for the song
+            string songname = filenames[pos];
+            string a = "/TEST/";
+            string fname = a + songname; //retrieves the file name
+            FILE *wave_file; 
+            wave_file = fopen(fname.c_str(),"r"); //opens the music file
+            waver.play(wave_file); //plays the music file
+            fclose(wave_file);
+        }
+    }
+ 
+}
+