![](/media/cache/profiles/5a3cd8928b0eb700317eb627594dbb3d.jpg.50x50_q85.jpg)
Bluetooth MP3 Player with uLCD, Speaker, and SD card hardware components
Dependencies: 4DGL-uLCD-SE SDFileSystem mbed-rtos mbed
Fork of app-board-RTOS-Threads by
Diff: main.cpp
- Revision:
- 5:4fb2d9e36571
- Parent:
- 4:79863d2ea5a0
--- a/main.cpp Sun Sep 22 17:57:46 2013 +0000 +++ b/main.cpp Tue Mar 14 16:05:38 2017 +0000 @@ -1,164 +1,247 @@ -// example to test the mbed Lab Board lcd lib with the mbed rtos -// Pot1 changes the contrast -// Pot2 changes the speed of the sin wave - #include "mbed.h" #include "rtos.h" -#include "Small_6.h" -#include "Small_7.h" -#include "Arial_9.h" -#include "stdio.h" -#include "C12832_lcd.h" +#include "uLCD_4DGL.h" +#include "SDFileSystem.h" +#include "wave_player.h" +#include <string> +#include <vector> +/* Hardware Initialization */ +Serial blue(p13,p14); +BusOut myled(LED1,LED2,LED3,LED4); +uLCD_4DGL uLCD(p28, p27, p30); +AnalogOut Speaker(p18); +SDFileSystem sd(p5, p6, p7, p8, "sd"); +wave_player waver(&Speaker); +FILE *wave_file; -C12832_LCD LCD; -AnalogIn Pot1(p19); -AnalogIn Pot2(p20); -PwmOut Speaker(p26); -PwmOut RGBLED_r(p23); -PwmOut RGBLED_g(p24); -PwmOut RGBLED_b(p25); -DigitalIn joyfire(p14); -BusIn joy(p15,p12,p13,p16); -BusOut leds(LED1,LED2,LED3,LED4); +/* Mutexes to make the code thread safe */ +Mutex lcd_mutex; +Mutex stdio_mutex; +Mutex time_mutex; +Mutex inx_mutex; +Mutex currSong_mutex; +Mutex printed_mutex; //Basically will need to go around every if statement. May be usable as a generic mutex for everything/ -// mutex to make the lcd lib thread safe -Mutex lcd_mutex; +/* Variables */ +bool Menu=1; //1: menu mode 0: play mode +vector <string> songList; // vector of songs to index +string currSong=""; +int startInx=0; // starting index of songs to display on lcd +int inxIncrement=2; //4=Full page scroll 1=single song scrolling +int songTime; +int numSongs; // total # of songs on sd card +string dir = "/sd/myMusic/"; // directory of songs on SD card +int songsPerPage=4; +bool playing = false; +bool printed = false; // Thread 1 -// print counter into first line and wait for 1 s +// Reads in input from bluefruit module +// Make sure to be using the Adafruit bluetooth app -> controller -> control pad void thread1(void const *args) { - int i; - while(true) { // thread loop - lcd_mutex.lock(); - LCD.locate(0,0); - LCD.set_font((unsigned char*) Small_6); - LCD.printf("Thread1 count: %d",i); - lcd_mutex.unlock(); - i++; - Thread::wait(1000); + while(1) { + char bnum = 0; // number 1-8 + char bhit = 0; // number 0 or 1 (release or hit) + if(blue.readable()) { + stdio_mutex.lock(); + // Command come in as !B## + if (blue.getc()=='!') { + if (blue.getc()=='B') { //button data packet + bnum = blue.getc(); //button number + bhit = blue.getc(); //1=hit, 0=release + if (blue.getc()==char(~('!' + 'B' + bnum + bhit))) { //checksum OK? + myled = bnum - '0'; //current button number will appear on LEDs + switch (bnum) { + case '1': + case '2': + case '3': + case '4': //number button 1-4 + if(Menu) { + /* Pressing a number button selects the corresponding + numbered song and displays the number on the LCD */ + currSong_mutex.lock(); + currSong = songList[startInx + bnum-'1']; + currSong_mutex.unlock(); + lcd_mutex.lock(); + uLCD.locate(0,15); + uLCD.printf("Song selected: %d", bnum - '0'); + lcd_mutex.unlock(); + } + break; + case '5': //button 5 up arrow + if (bhit=='1') { + if(Menu) { + /* Page up */ + inx_mutex.lock(); + startInx -= inxIncrement; + startInx = startInx<0?0:startInx; + inx_mutex.unlock(); + printed_mutex.lock(); + printed = false; + printed_mutex.unlock(); + } + break; + case '6': //button 6 down arrow + if (bhit=='1') { + if(Menu) { + /* Page down */ + inx_mutex.lock(); + startInx += inxIncrement; + startInx = startInx>songList.size()-songsPerPage?songList.size()-songsPerPage:startInx; + inx_mutex.unlock(); + printed_mutex.lock(); + printed = false; + printed_mutex.unlock(); + } + } + break; + case '7': //button 7 left arrow + // stops the music from playing + // does nothing if nothing is playing + if (bhit=='1') { + if(!Menu) { + playing = false; + Menu = 1; + printed_mutex.lock(); + printed =false; + printed_mutex.unlock(); + } + } + break; + case '8': //button 8 right arrow + // change to play menu and play music + if (bhit=='1') { + if(Menu) { + lcd_mutex.lock(); + uLCD.cls(); + // Draw a playing icon + uLCD.circle(60,40,40,GREEN); + uLCD.triangle(45,70,45,10,95,40,GREEN); + uLCD.locate(0,12); + currSong_mutex.lock(); + // Display current song playing + uLCD.printf("%s playing...",currSong.substr(0,currSong.find(".wav"))); + currSong_mutex.unlock(); + lcd_mutex.unlock(); + playing =true; + Menu = 0; + } + } + break; + default: + break; + } + } + } + } + stdio_mutex.unlock(); + } + } + Thread::wait(250); // wait .25s } } // Thread 2 -// print counter into third line and wait for 0,5s +// Play the currSong selected from the bluetooth controller +// playing is a bool defined in the waveplayer as an extern variable that adds +// play/stop functionality void thread2(void const *args) { - int k; - while(true) { // thread loop - lcd_mutex.lock(); - LCD.locate(0,20); - LCD.set_font((unsigned char*) Arial_9); - LCD.printf("Thread 2 count : %d",k); - lcd_mutex.unlock(); - k++; + while(true) { + if(!Menu && playing && !(currSong == "")) { + time_mutex.lock(); + // restart songTime + songTime=0; + time_mutex.unlock(); + string fileBuffer; + currSong_mutex.lock(); + // concatenate the directory with the song selected + fileBuffer = "/sd/myMusic/" + currSong; + currSong_mutex.unlock(); + // convert to const char* for the wave_file to open + const char* songToPlay = fileBuffer.c_str(); + wave_file = fopen(songToPlay, "r"); + waver.play(wave_file); + fclose(wave_file); + playing =false; + Menu=1; + printed_mutex.lock(); + printed = false; + printed_mutex.unlock(); + } Thread::wait(500); // wait 0.5s } } -// Thread 3 -// print a sin function in a small window -// the value of pot 1 changes the speed of the sine wave -void thread3(void const *args) +int main() { - int i,k,v; - double s,a; - k = 1; - lcd_mutex.lock(); - LCD.rect(89,0,127,17,1); - lcd_mutex.unlock(); - while(true) { // thread loop - v = Pot1.read_u16(); // get value of pot 1 + uLCD.cls(); + // Read all files on SD card into a string vector called songList + // Make sure to lock appropriate mutexes + DIR *dp; + struct dirent *dirp; + dp = opendir("/sd/myMusic"); + numSongs = 0; + if (dp != NULL) { lcd_mutex.lock(); - for (i=90; i<127; i++) { - s = 8 * sin((long double)(i+k) /5); // pixel to print - a = 8 * sin((long double)(i+k-1) /5); // old pixel to erase - LCD.pixel(i,9 + (int)a ,0); // erase pixel - LCD.pixel(i,9 + (int)s ,1); // print pixel + stdio_mutex.lock(); + while ((dirp = readdir(dp)) != NULL) { + songList.push_back(string(dirp->d_name)); + //uLCD.printf("\r%s\r\n", string(dirp->d_name)); + numSongs++; } - LCD.copy_to_lcd(); // LCD.pixel does not update the lcd lcd_mutex.unlock(); - k++; - Thread::wait(v/100); // value of pot1 / 100 + stdio_mutex.unlock(); + } else { + uLCD.printf("Could not open directory!\n"); + } + closedir(dp); + + // Print songsPerPage # onto the LCD screen + for (int i = 0; i < songsPerPage; i++) { + lcd_mutex.lock(); + uLCD.printf("\r%d. %s\r\n\r\n", (i+1), songList[startInx+i].substr(0,songList[startInx + i].find(".wav"))); + lcd_mutex.unlock(); } -} + printed = true; + // Set bluetooth baudrate + blue.baud(9600); + + // Start threading + Thread t1(thread1); // bluetooth + Thread t2(thread2); //song + + songTime=0; -// Thread 4 -// input pot 2 and change the contrast of LCD -void thread4(void const *args) -{ - int k; - while(true) { // thread loop - k = Pot2.read_u16(); // get the value of poti 2 - k = k >> 10; // need only 6 bits for contrast - lcd_mutex.lock(); - LCD.set_contrast(k); - lcd_mutex.unlock(); - Thread::wait(500); // wait 0.5s - } -} -// Thread 5 -// RGB LED -void thread5(void const *args) -{ - while(true) { // thread loop - RGBLED_r = 0.5 + (rand() % 11)/20.0; - RGBLED_g = 0.5 + (rand() % 11)/20.0; - RGBLED_b = 0.5 + (rand() % 11)/20.0; - Thread::wait(1667); // wait 1.5s + // Main thread - counts up songTime and displays the time the song has been + // playing on LCD screen + while(true) { // main is the next thread + if(!Menu) { + lcd_mutex.lock(); + stdio_mutex.lock(); + uLCD.locate(0,15); + time_mutex.lock(); + uLCD.printf("%d:%02d",songTime/60,songTime%60); + songTime++; + time_mutex.unlock(); + lcd_mutex.unlock(); + stdio_mutex.unlock(); + } else { + printed_mutex.lock(); + if(!printed) { + lcd_mutex.lock(); + uLCD.cls(); + for (int i = 0; i < songsPerPage; i++) { + // Creates a substring out of the wave file names which takes out the .wav in the title + uLCD.printf("\r%d. %s\r\n\r\n", (i+1), songList[startInx+i].substr(0,songList[startInx + i].find(".wav"))); + } + lcd_mutex.unlock(); + printed =true; + } + printed_mutex.unlock(); + } + Thread::wait(1000); // Waits 1 second before updating songTime } } -// Thread 6 -// Speaker -void thread6(void const *args) -{ - while(true) { // thread loop - Speaker.period(1.0/800.0); - Speaker = 0.01; - Thread::wait(1000); // wait 1.0s - Speaker.period(1.0/969.0); - Speaker = 0.01; - Thread::wait(1000); // wait 1.0s - } -} - -// Thread 7 -// Joystick controls onboard mbed LEDs -void thread7(void const *args) -{ - while(true) { // thread loop - if (joyfire) { - leds = 0xf; - } else { - leds = joy; - } - Thread::wait(200); // wait 0.25s - } -} - - - -int main() -{ - int j; - LCD.cls(); - - Thread t1(thread1); //start thread1 - Thread t2(thread2); //start thread2 - Thread t3(thread3); //start thread3 - Thread t4(thread4); //start thread4 - Thread t5(thread5); //start thread5 - Thread t6(thread6); //start thread6 - Thread t7(thread7); //start thread7 - - while(true) { // main is the next thread - lcd_mutex.lock(); - LCD.locate(0,9); - LCD.set_font((unsigned char*) Small_7); - j = LCD.get_contrast(); // read the actual contrast - LCD.printf("contrast : %d",j); - lcd_mutex.unlock(); - Thread::wait(500); // wait 0.5s - } -}