Revision 3:82b68ab94e3e, committed 2016-12-13

Comitter:

LyCosine

Date:

Tue Dec 13 10:00:51 2016 +0000

Parent:

2:087f60c3c445

Commit message:

Yan revised

Changed in this revision

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/ReadTime.h	Tue Dec 13 10:00:51 2016 +0000
@@ -0,0 +1,85 @@
+#include<stdio.h>
+#include<string.h>
+#include<stdlib.h>
+
+char ToHex(int num) {
+    if (num < 0 && num > 15) {
+        return '!';
+    }
+    else if (num < 10) {
+        return num + 48;
+    }
+    else {
+        switch (num) {
+        case 10: return 'A';
+        case 11: return 'B';
+        case 12: return 'C';
+        case 13: return 'D';
+        case 14: return 'E';
+        case 15: return 'F';
+        }
+    }
+    return '?';
+}
+
+int ToDec(char *str) {
+    int num = 0;
+    bool flag = true;
+    int len = strlen(str);
+    for (int i = 0; i < len; i++) {
+        if (flag && str[i] == '0') {
+            continue;
+        }
+        flag = false;
+        if (str[i] > '9') {
+            num = 16 * num + (str[i] - 55);
+        }
+        else {
+            num = 16 * num + (str[i] - '0');
+        }
+    }
+    return num;
+}
+
+double ReadTime(const char *path) {
+    char size[9];
+    char byteRate[9];
+    unsigned char ch[100];
+    FILE *file;
+
+    file = fopen(path,"rb");
+    
+    for (int i = 0; i < 58; i++) {
+        ch[i] = fgetc(file);
+    }
+
+    for (int i = 7, j = 0; i >= 4; i--, j += 2) {
+        if (ch[i] < 16) {
+            size[j] = '0';
+            size[j + 1] = ToHex(ch[i]);
+        }
+        else {
+            size[j] = ToHex(ch[i] / 16);
+            size[j + 1] = ToHex(ch[i] % 16);
+        }
+    }
+    size[8] = '\0';
+
+    for (int i = 31, j = 0; i > 27; i--, j += 2) {
+        if (ch[i] < 16) {
+            byteRate[j] = '0';
+            byteRate[j + 1] = ToHex(ch[i]);
+        }
+        else {
+            byteRate[j] = ToHex(ch[i] / 16);
+            byteRate[j + 1] = ToHex(ch[i] % 16);
+        }
+    }
+    byteRate[8] = '\0';
+
+    int n_size = ToDec(size);
+    int n_byteRate = ToDec(byteRate);
+    double time = (double)n_size / (double)n_byteRate;
+    
+    return time;
+}
\ No newline at end of file

--- a/main.cpp	Mon Dec 12 04:51:19 2016 +0000
+++ b/main.cpp	Tue Dec 13 10:00:51 2016 +0000
@@ -3,6 +3,7 @@
 #include "PinDetect.h"
 #include "USBHostMSD.h"
 #include "C12832.h"
+#include "ReadTime.h"
 #include <vector>
 #include <string>
 
@@ -28,6 +29,8 @@
 PinDetect pb4(p15); //joydown
 PinDetect pb5(p14);//center
 
+Timer timer; //timer
+
 AnalogOut DACout(p18); //set up speaker
 wave_player waver(&DACout); //set up wave player library
 int pos = 0; // index of the song
@@ -35,6 +38,7 @@
  
 bool playing = false; //variable for pause/play 
 bool firstplay = false; //variable for first play
+int total_time = 0;
 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
@@ -113,6 +117,32 @@
     }
 }
 
+void show_information(const void *argv) {
+    while (1) {
+        int t = timer.read();//playing time
+        int left_time = total_time - t;//left time
+        int bar_len = 21 * t / total_time;//length of bar
+        lcd.cls();
+        lcd.locate(0,0);
+
+        lcd.locate(100,0);
+        lcd.printf("vol: %d", 15 - vol);
+        lcd.locate(0,20);
+        for (int i = 0; i < bar_len; i++) {
+            lcd.printf("_");
+        }
+        int min1 = t / 60;
+        int sec1 = t % 60;
+        int min2 = left_time / 60;
+        int sec2 = left_time % 60;
+        lcd.locate(0,18);
+        lcd.printf("%02d:%02d", min1, sec1);
+        lcd.locate(105,18);
+        lcd.printf("%02d:%02d", min2, sec2);
+        Thread::wait(500);
+    }
+}
+
 
 int main()
 {
@@ -147,7 +177,6 @@
     while(!msc.connect()) {
         lcd.locate(0,0);
         lcd.printf("Insert USB");
-        wait(.5);
     }    
     // Read the songs array, please note that your wav files have to be stored in the same directory
     read_file_names("/msc/music_wav");
@@ -163,10 +192,13 @@
             string fname = a + songname; //retrieves the file name
             FILE *wave_file; 
             lcd.cls();
-            lcd.locate(0,1);
-            lcd.printf("Playing: %s",fname.c_str());
+            total_time = (int)ReadTime(fname.c_str());
             wave_file = fopen(fname.c_str(),"r"); //opens the music file
+            Thread thread(show_information);
+            timer.start();
             waver.play(wave_file);
+            timer.stop();   
+            timer.reset();
             fclose(wave_file);
         }
         firstplay = false;