MP3stick MP3 Player
The MP3stick is a simple and small portable MP3 player. A microcontroller Atmel AVR ATmega128 is the heart of the circuit. MP3 decoding is done by an VLSI VS1011b decoder IC. A MMC/SD card works as memory medium for MP3 files, playlist files and skin files. The player is designed to draw his power from a LiIo/LiPo battery with 3.6V. a charger cicuit, based on MAX1811, is included. All information will be shown on a Nokia color LCD with 128×128 pixel and 256 colors. The player will work in text-only mode and if a skin file is available, also with nice graphic skins. A docking port allows outside connectivity for serial control signals, audio signals and charger voltage input.
Project Pictures
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Hardware description
- IC4 ATmega128L-8A,UMain controller running at 8MHz internal RC oszillator, circuit is ATmega1281 or ATmega2561 compatible
- IC2 VS1011b MP3 decoder IC
- IC3 LM2940IMP-5.0 Low drop fixed voltage regulator, supplies 5V to battery charger from 5-26V input voltage
- IC5 MAX1811ESA LiIo/LiPo battery charger, set to 100mA charging current, selectable battery type
- IC6 LP2981IM5-3.3 Low drop fixed voltage regulator, main 3.3V power supply
- IC1 LT1932 White LED driver, power supply for LCD backlight
- LCD1 Nokia color LCD from Nokia 6610 phone, connected via Hirose DF23 connector
- SW1 Alps SLLB Slide and push button switch made by Alps
- CARD1 FPS009-3002 Yamaichi SD/MMC slot
- K4 7pin Header Docking port , 2.54mm / 0.1″ Pinout:
- 1 – Charger input 5-26V
- 2 – Serial input, 19200 Baud, 3.3V level
- 3 – Serial output, 19200 Baud, 3.3V level
- 4 – GND
- 5 – Left audio out
- 6 – Right audio out
- 7 – Not connected
- Copy your MP3 files to SD/MMC card as required. Don’t care about file and folder names or directory structure.
- Create an M3U playlist from your SD/MMC card content. Save this playlist root directory of your card. The first 32 characters of the filename will be equal to MP3stick playlist name.The firmware supports normal and extented M3U playlists, where the extented format is preferred.
- Download the iPod theme skin. All required files are included.
- Change the BMP images as required, read the Bitmaps.txt file about there format and decription.
- Change the lcd_layout.h as required. If you change this file you must recompile and reload the firmware with this file included.
- Run the skin_packer.exe to compress all BMP images to one binary file, the skin.skn.
- Copy the skin.skn file to your SD/MMC card root directory.Note: The MP3stick player will work without *.skn file, but in text-only mode then.
- Connect the MP3stick PCB to your STK500 development board via ISP interface. For pin-out see schematic file page 2.
- Program the correct fuse settings. See pictures above.
- Unpack the ZIP file and run the batch file “ISP_rc_calib.bat”. The tool will tell you the RC calibration byte after successful calibration process. STK500 is expected on COM1.
- Enter the calibration byte in firmware file “firmware_conf.h” then recompile and update the firmware on your player.
Power consumption
- Test voltage 4.1V
- Play mode, LCD Backlight OFF, 2GB card 52mA
- Play mode, LCD Backlight 50%, 2GB card 66mA
- Play mode, LCD Backlight 100%, 2GB card 85mA
- Stop mode, LCD Backlight OFF, 2GB card 27mA
- Stop mode, LCD Backlight 50%, 2GB card 42mA
- Stop mode, LCD Backlight 100%, 2GB card 58mA
- Sleep mode, 2GB card 860uA
- Sleep mode, no card 540uA
Firmware features
- Written in C for WinAVR compiler based on avr-gcc v3.4.5 or higher including avr-libc v.1.4.3 or higher
- Supported file system FAT32
- Direct M3U playlist support
- ID3 v1 & v2 tag support (title, artist, album, title length[v2])
- Color skin/theme support, Yampp3USB/Yampp7 compatible
- Adjustable LCD contrast, backlight brightness and auto off time, bass enhancer in VS1011b, volume and balance
- All adjustable options are stored in EEPROM Serial IO interface
- 3.5mm audio jack
- External audio via docking port
- One key handling
- Battery voltage monitoring
- Auto power off on low battery
- Remote control via serial interface
- Information output for firmware and bootloader via serial interface
Key handling
- Stop mode
- Up – no function
- Center short press – no function
- Center long press – enter menu
- Down – no function
- Play mode
- Up – previous title
- Center short press – no function
- Center long press – enter menu
- Down – next title
- Menu mode
- Up – previous menu entry / increase selection
- Center short press – execute function, select/deselect entry to modify
- Center long press – no function
- Down – next menu entry / decrease selection
Serial control commands
- Play – g
- Stop – G
- Next title – n
- Previous title – p
- Next playlist – N
- Previous playlist – P
- Menu – M
- Up – U
- Down – D
- Enter – E
- Sleep – S
Menu functions
- PLAY / STOP
- start and stop playing
- NEXT TITLE
- select next title
- PREV TITLE
- select previous title
- NEXT PLAYLIST
- select next playlist
- PREV PLAYLIST
- select previous playlist
- VOL
- change volume, range 0 – 10
- BAL
- change balance, range -10 – 0 – +10
- BASS Hz
- change bass boost low limit frequency, range 0-150Hz
- BASS dB
- change bass boost amplitude, range 0-15dB, 0dB turns the booster off
- RANDOM
- change random play mode
- OFF – normal play mode, song after song, single playlist
- SONG – random song from actual playlist
- PL – song from random playlist
- PL+SONG – random song from random playlist
- PL->PL – song after song from all playlists
- BLIGHT s
- change backlight auto off time, range 0-25s, 0 means always on
- BLIGHT %
- change backlight brightness, range 0-100%
- CONTRAST
- change LCD contrast
- SLEEP
- turn player off, set into sleep mode
- BOOTLOAD
- call the bootloader for firmware loading
- Only for empty controller: Programm the bootloader into the ATmega128 using a In-Circuit-Programmer (ISP)
- Compile the firmware as required, or use the precompiled firmware file.
- Copy the firmware binary file: MP3stick.bin to the root directory of your MMC/SD card
- Cycle power or call the bootloader from menu
- The bootloader will search the root directory for the file MP3stick.bin. The file will be deleted by the bootloader after programming the uC.
- You can monitor bootloader activity via serial interface.
How to use the Bootloader
- Only for empty controller: Programm the bootloader into the ATmega128 using a In-Circuit-Programmer (ISP)
- Compile the firmware as required, or use the precompiled firmware file.
- Copy the firmware binary file: MP3stick.bin to the root directory of your MMC/SD card
- Cycle power or call the bootloader from menu
- The bootloader will search the root directory for the file MP3stick.bin.
The file will be deleted by the bootloader after programming the uC. - You can monitor bootloader activity via serial interface.
Fuse Settings in AVR-Studio and PonyProg2000
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- Copy your MP3 files to SD/MMC card as required. Don’t care about file and folder names or directory structure.
- Create an M3U playlist from your SD/MMC card content. Save this playlist root directory of your card. The first 32 characters of the filename will be equal to MP3stick playlist name.The firmware supports normal and extented M3U playlists, where the extented format is preferred.
How to create and use skins
- Download the iPod theme skin. All required files are included.
- Change the BMP images as required, read the Bitmaps.txt file about there format and decription.
- Change the lcd_layout.h as required. If you change this file you must recompile and reload the firmware with this file included.
- Run the skin_packer.exe to compress all BMP images to one binary file, the skin.skn.
- Copy the skin.skn file to your SD/MMC card root directory.Note: The MP3stick player will work without *.skn file, but in text-only mode then.
How to calibrate the internal RC oscillator
- Connect the MP3stick PCB to your STK500 development board via ISP interface. For pin-out see schematic file page 2.
- Program the correct fuse settings. See pictures above.
- Unpack the ZIP file and run the batch file “ISP_rc_calib.bat”. The tool will tell you the RC calibration byte after successful calibration process. STK500 is expected on COM1.
- Enter the calibration byte in firmware file “firmware_conf.h” then recompile and update the firmware on your player.
Hi, look there are new microchip called
http://www.vlsi.fi/en/products/vs1053.html
which can read Ogg Vorbis / MP3 / AAC / WMA / FLAC, so maybe you could upgrade your stick with that chip, I do not think it would be very hard.
And can I put other for example vs1003 instead of vs1011?
About sd card, there is some micro or mini sd, can I use that instead of big sd card?
Thank you,
Nikolaj
This project will not be continued, cause I’m sticking with the yamppPod instead.
The VS1003 can be replaced, but firmware changes will be necessary.
Micro or mini SD cards will work, just use an adapter.
Hi Michael
I have problems with LCD.I’ve got the mirror screen.Is problem
with LCD or another controller instead Philips PCF8833 or just
6610 LCD from unknown series.
Could you please describe it more in details the calibration?
thanks for the answ.
best regards
Milek
A mirrored LCD is mainly because of the LCD design. Can be fixed through firmware changes.
Hi Michael,
Can I use this MicroSD adapter?
http://gravitech.us/MicroResearch/Others/MICROSD-ADP/MicroSD-ADP_Schematic.pdf
Can I use vs1053? I will need to made firmware changes? Because this is never and cheaper chip.
You said you are sticking with the yamppPod. I do not have conditions to program arm micro controllers, you use them because they are faster? But do you have better sound quality?
Thank you,
Nikolaj
Nikolaj,
when I said adapter I meant something like this: http://prosoft-informatica.com/loja/images/micro_sd_adapter.jpg
A level converter is not needed since the MP3stick is running at 3.3V internally anyway.
About the VS1053 I don’t know, but firmware changes are required for sure, possibly some hardware changes as well.
With the yamppPod sound will not be better cause it uses a VS1033.
Btw, ARM programming is easy, an FT2232 is required to make an openOCD JTAG programmer. See the yammpPod reference documentation.
Hello Michael,
I am looking forward to make MP3 player like you did, but firmware which i copy from site says that it is courrupted.
Please suggest.
BR,
Dinesh
Use 7zip or WinRAR to open the ZIP files. Obviously WinZIP has problems to open the files sometimes.
can i use VS1011E instead of VS1011B? or do i have to do firmware changes?
VS1011E should work fine, but I didn’t test myself. Althought some people contacted me about this in the past, till now I got no negative feedback.
hi michael,
I have problem with the lcd. when I define “white”, the color become black and vice versa. The other colors are also came out wrong.
is the problem came from the lcd or the firmware?
thank you.
That sound like an LCD problem. I can barely remember that there was different behaviour of LCD controllers from different manufacturers. That was Epson and Philips, where the Epson LCD’s showed mainly the odd behaviour.
I would try another LCD.
This links (section “Hardware description”) are broken (404 Not Found):
FLS009-3002.pdf
LP2981.pdf
LT1932.pdf
PCF8833.pdf
Could you please place those files on right place, so we can download them.
Not sure on what page you are refering to, but on mine there are no linked PDF’s.
Hi Michael.
Is ti possible to use VS1001K but not VS1011B without any firmware chenges?
Thanks
I have doubt’s that it will work. Other way around yes, but not the older chip instead the newer.
Hi . I find your MP3 player but question is:
where I can buy complete function assembly MP3 player??
is there any web where is possible to buy this ???
thanks
The MP3stick is not for sale. That’s a geek project, for enthusiasts who want to build stuff themselves.
If you want something already assembled and ready-to-go then you may consider buying an off the shelve player. It’s cheaper anyway.
Hi,
What program can open the skin.skn (ipod theme) ? I can recompile with Winavr 20100110 ?
Thank you .
The skin.skn contains all required .bmp files in a packed format. There is no program to open it, only the MP3stick firmware will read this.
The zip contains an skin_packer.exe which is used to generate a new skin.skn out of the required .bmp images.
If you want to change the skin then you need to edit the bmp’s first, repack them and copy the new skin.skn to your SD card.
HI ,
Gerber file is orcad or eagle file ?
Thank you .
Gerber is Gerber – an universal CAD format, not depending on any proprietary software.
Get a copy of GC-Prevue if you have problems to open the files in your layout program.
http://www.pcb-pool.com/ppuk/service_downloads.html
Hi. already I want buy this mp3 player but really assembled. Who can do it??? I buy one from web but source code are in asm , very complicated for me.
or is possible to change your code to my hardware???
MUC is atmega128, vs1053b and LCD is from E700 cell phone, schematic is possible to send.
thanks
Sorry, but for such things I have no spare time.
hey.thank you so much for this! I just have a simple question, is the file system attached with the sd card or you need to program yourself? thanks a lot
The file system is FAT32 and the necessary directory/file structure to be copied to the card is available for download.
HI ,
The program can recover a atmega1284.
Thank you.
What you mean with “recover”?
In case you want to run the firmware on a ATmega1284 then you need to change a few things and re-compile. But I don’t know, never tried.