STMicroelectronics UM0622 Bedienungsanleitung

November 2009 Doc ID 15260 Rev 1 1/28

UM0622

User manual

STEVAL-ICV002V1, portable media player

based on the STM32F103VB

Introduction

This document explains how to use the portable media player demonstration board. The

board demonstrates the multimedia capabilities of the STM32F103VB-based system. All

STM32 MCUs can be used for this purpose.

The demonstration board has the following features.

■Playback of MP3 songs with volume, bass and treble settings based on STA013.

■Voice recording and playback.

■JPEG decompression managed with small RAM (20 KB) in the STM32.

■Digital photo frame capability.

■System firmware used for managing files stored in an SD card.

■Menu browsing on resistive 2.4" TFT touch screen.

■Battery and USB powered.

The board operates in two modes: music player and picture viewer.

In music player mode, the STM32 microcontroller takes MP3 files from the microSD card,

decodes the ID3v2 tags and plays back the selected song. The volume, bass and treble can

be adjusted using the resistive touch screen menu (see note below). The board can also be

used in picture-viewer mode, in which the STM32 displays the JPEG images stored on the

microSD card. The user can navigate through the images using the touchscreen menu

(normal mode) or can view the images in full screen (screensaver) mode. A voice tag (voice

message) can also be recorded and attached to each image and played each time the

image is displayed.

Note: 1 The STMPE811 is the resistive touch controller. The STA013 (MPEG 2.5 layer III audio

decoder) is used for playing back MP3 songs, and has specific volume, bass and treble

settings.

Figure 1. Block diagram

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Contents UM0622

2/28 Doc ID 15260 Rev 1

Contents

1 Getting started . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

1.1 System requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

1.2 Package contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

1.3 Software installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

1.4 Hardware installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

1.4.1 Power supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

2 Running the portable media player (PMP) . . . . . . . . . . . . . . . . . . . . . . . 6

2.1 Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

2.2 Music player . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

2.3 Picture viewer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

2.3.1 Picture control bar . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

3 Schematics and bill of material . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

3.1 Demonstration board schematic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

3.2 Bill of material . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

4 References . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

5 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

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UM0622 List of figures

Doc ID 15260 Rev 1 3/28

List of figures

Figure 1. Block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

Figure 2. Portable media player demonstration board. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

Figure 3. Home screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Figure 4. Card missing message . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Figure 5. Settings. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Figure 6. Track list . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Figure 7. Song information. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Figure 8. Player window (song playing) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

Figure 9. Player window (song paused). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

Figure 10. Picture viewer - normal mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

Figure 11. Voice record window. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

Figure 12. Picture viewer - screensaver mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

Figure 13. Microcontroller section . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

Figure 14. Power supply section . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

Figure 15. MP3 section . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

Figure 16. Audio codec section . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

Figure 17. Switching section . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

Figure 18. Touchscreen section . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

Figure 19. Connectors section . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

Figure 20. Audio play section . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

Figure 21. Audio-OUT section . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

Figure 22. Audio record section . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

Figure 23. µSD section . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

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Getting started UM0622

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1 Getting started

1.1 System requirements

A USB power supply is required if the board is operated in USB supply mode.

1.2 Package contents

The portable media player board includes the following items.

●Hardware content

– STEVAL-ICV002V1 demonstration board

–MicroSDcard

– Stylus pen

– Mini B USB cable

●Documentation

–Usermanual

1.3 Software installation

No software installation is necessary.

1.4 Hardware installation

Figure below shows the portable media player demonstration board (STEVAL-ICV002V1).

Figure 2. Portable media player demonstration board

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UM0622 Getting started

Doc ID 15260 Rev 1 5/28

1.4.1 Power supply

The demonstration board can be powered from a mini B USB connector (bus powered), or a

3.7 V Li-Ion battery inserted into the battery holder connected at the back of the board. The

supply is selected through resistor R77 or R78.

●R77: mounted at a zero ohm value to select the battery supply. The board runs using

the power supply from a battery connected to the connections at J6. The on-board

circuit has the capability to charge the rechargeable battery. R78 must be removed

(open circuit) before mounting R77.

●R78: mounted at a zero ohm value to select the USB supply. The board runs using the

USB power supply. R77 must be removed (open circuit) before mounting R78.

Note: To operate in battery mode, you can use any 3.7 V, 600 mAh Li-Ion battery. The mechanical

dimensions of the battery intended for this board are 32 mm x 38 mm x 6 mm (similar to

Nokia BL-5X batteries).

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Running the portable media player (PMP) UM0622

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2 Running the portable media player (PMP)

After the system is switched on, a home screen appears on the TFT, as shown in figure

below. This confirms that the demonstration board has been powered up correctly and that

the microSD card has been detected by the system.

Figure 3. Home screen

If the microSD card is not plugged into its connector, the message shown in figure below will

appear on the TFT. The card will have to be inserted and the system reset by pressing SW1

(ON/OFF switch) to start again.

Figure 4. Card missing message

Once the card has been inserted and the system reset, the system is launched and the

home screen appears.

The entire menu can be accessed from the home screen using the stylus stick provided with

the system, through a single tap-touch operation (and not slide-touch or multi-touch

operation).

The board can be run as a music player or picture viewer application by selecting the

required application from the home screen (MUSIC or PICs in Figure 3).

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2.1 Settings

The SETTINGS option on the home screen serves to change the system settings, such as

turning the power saving mode to ON or OFF. The selected state is automatically saved.

Figure 5. Settings

If the power-save mode is ON, the system switches immediately to this mode unless the

TFT has been programmed to operate continuously for a pre-defined time. When the system

goes into power-save mode, the TFT display switches OFF while the current application

keeps running in the background. You can come out of power-save mode by giving a simple

tap on the touchscreen.

If the power-save mode is OFF the TFT display always stays ON.

To return to the home screen from the SETTINGS menu, simply touch the HOME icon at the

bottom left-hand corner of the display.

2.2 Music player

The board can be used in music player mode to play MP3 songs by selecting the MUSIC

block on the home screen. The music player application initializes and displays "Initializing

music player, use jack J1", indicating that the music output is available at audio jack J1.

Plug your headphones and/or speaker into this jack to listen to MP3 songs.

If no MP3 file is present on the card, the TFT displays "NO MP3 FILES" and the menu

returns to the home screen.

If MP3 files are present on the microSD card, a track list appears, displaying the title of all

the tracks saved on the microSD card (Figure 6).

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Figure 6. Track list

To select a particular song, touch the corresponding track with the Stylus pen.

To return to the home screen, touch the HOME icon at the bottom of the window.

When a song is selected, the corresponding track is highlighted and the ID3 tags attached to

the song are displayed in the song information window (see figure below).

Figure 7. Song information

Note: The microcontroller can only decode ID3 v2.0 tags. For MP3 files tagged with a different

version of ID3, the microcontroller displays the default "UNKNOWN" tag, as shown in

Figure 8.

The display moves automatically from the song information window to the music player

window (Figure 8).

The music player window shows the playing status of the selected track. From here you can

configure the volume (V), bass (B) and treble (T) settings.

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Figure 8. Player window (song playing)

The controls for V, B and T are tap-based and not slide-based; simply touch the next desired

level-point on the corresponding bar to change the levels (do not use a sliding motion to

reach the desired level).

Touch the pause button to pause the current song and the play button to resume (see figure

below).

Figure 9. Player window (song paused)

Touch the STOP button to go back to the track list menu.

Note: The menu supports a maximum of six MP3 tracks on the microSD card.

The name of each MP3 file stored on the card should not exceed 7 letters, including the

.mp3 extension.

Note that when a song reaches the end it automatically starts playing back again in repeat

mode.

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2.3 Picture viewer

The picture viewer application can run in two modes.

●Normal mode: images are displayed in a smaller size along with a control bar for user

operations such as moving to the next or previous image.

●Screensaver mode: images are displayed continuously in full TFT screen size without

any user controls.

To run the PMP in picture viewer mode select the PICS block from the home screen.

If no JPEG file is found, the message "NO JPEG IMAGES" is displayed on the screen.

If JPEG files are present on the card, the system starts initializing the picture viewer

application and displays" Initializing picture viewer, use speaker jack for voice ", after which

the system starts displaying images in normal mode (the first image is displayed and the

picture control bar is displayed below the image, as shown in figure below).

Figure 10. Picture viewer - normal mode

2.3.1 Picture control bar

The picture control bar appears in normal mode only and not in screensaver mode.

Home icon

This icon is located at the bottom left-hand corner of the control bar and takes you back to

the home screen.

Add record icon

This icon is used to add a voice tag to the image. On selecting this option, the RECORD

INFO window opens.

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