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November 2012 Doc ID 018665 Rev 3 1/21
UM1069
User manual
STM3220G-EVAL/STM3221G-EVAL demonstration firmware
Introduction
This user manual describes the demonstration firmware running on the STM3220G-EVAL
(Rev. B) evaluation board, which can be used to evaluate the capabilities of the STM32F2xx
microcontrollers and on-board peripherals. The demonstration firmware also runs on the
STM3221G-EVAL evaluation board.
In case the STM3220G-EVAL board was not factory-programmed or the demonstration
application was erased, it can be re-programmed by following the steps described in
Chapter 3: Programming the demonstration.
The STM3220G-EVAL board comes with a USB Flash disk preprogrammed with audio and
images resources used by the demonstration. You can load your own image (*.bmp) and
audio (*.wav) files provided that the file formats are supported by the demonstration
firmware.
For more details, please refer to Section 2.5: Image browser and Section 2.8: Audio player.
The default audio files available in the USB Flash disk are based on free music downloads
from the DanoSongs.com website. This demonstration firmware is available for download
from the STMicroelectronics website at www.st.com.
Figure 1. STM3220G-EVAL demonstration application
Ta bl e 1 lists the development tools concerned by this user manual.
Table 1. Applicable tools
Type Applicable tools
Development tools STM3220G-EVAL, STM3221G-EVAL
www.st.com
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Contents UM1069
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Contents
1 Demonstration architecture overview . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
1.1 Hardware resources . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
1.2 Hardware configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
1.2.1 Required accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
1.2.2 Jumper configurations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
1.3 Firmware architecture . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
2 Demonstration architecture overview . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
2.1 Navigation procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
2.2 Demo startup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
2.3 USB console . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
2.4 System info . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
2.5 Image browser . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
2.6 Web server . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
2.7 USB joystick . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
2.8 Audio player . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
2.9 Analog clock . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
2.10 Camera . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
2.11 Sub-demo interaction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
3 Programming the demonstration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
4 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
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UM1069 List of tables
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List of tables
Table 1. Applicable products and tools . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Table 2. Jumper configurations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Table 3. Supported bitmap formats . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Table 4. Audio file configurations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Table 5. Document revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
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List of figures UM1069
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List of figures
Figure 1. STM3220G-EVAL demonstration application . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Figure 2. Hardware block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Figure 3. Hardware configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Figure 4. USB Flash disk tree structure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Figure 5. Firmware architecture . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Figure 6. Startup screen during initialization phase . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Figure 7. Main desktop (icon view widget) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Figure 8. USB console frame window . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Figure 9. First frame window . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Figure 10. Second frame window . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Figure 11. Third frame window . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Figure 12. Image browser . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Figure 13. Web server DHCP server reply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Figure 14. Connection properties screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Figure 15. TCP/IP properties screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Figure 16. Connection status screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Figure 17. HID properties screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Figure 18. USB joystick status screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Figure 19. Audio player diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Figure 20. Audio player interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Figure 21. Analog clock window . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Figure 22. Analog clock configuration window. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Figure 23. Analog clock date and time format . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Figure 24. Analog clock error message . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Figure 25. Camera diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Figure 26. Capture screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
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1 Demonstration architecture overview
1.1 Hardware resources
The demonstration firmware mainly uses the following two peripherals which are major
features of the STM32F2xx device:
● Ethernet (web server)
● USB on-the-go: the USB OTG Full Speed (FS) is used in Host mode for audio and
image media storage while the USB OTG High Speed (HS) is used for the USB Human
Interface Device (HID) applications
The firmware makes use of other STM32 peripherals for demonstration purposes:
● User interface: color display, LEDs, event input (keys, touch screen)
● I2S IP for the audio (.wav file) player
● Digital camera interface (DCMI) for the camera application
● RTC IP for the clock application
Other STM32 hardware features are used globally by the demonstration application and the
software environment (for example, the SysTick timer for the real-time operating system
(RTOS), the I
2
C for the IO expander used by the touch screen, etc.).
The camera application also uses the SRAM embedded on the STM3220G-EVAL board to
store the camera frames via the DMA before they are output to the display through the GUI.
Figure 2. Hardware block diagram
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1.2 Hardware configuration
Figure 3. Hardware configuration
1.2.1 Required accessories
In addition to the STM3220G-EVAL board, the demonstration requires the following
accessories:
● Micro-AB to standard receptacle A connector (provided with STM3220G-EVAL board
package)
● Micro-AB to standard plug A connector (provided with STM3220G-EVAL board
package)
● Headphone with male jack connector
● USB Flash disk (provided with STM3220G-EVAL board package)
Figure 4. USB Flash disk tree structure
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1.2.2 Jumper configurations
1.3 Firmware architecture
The demonstration is built with a modular architecture based on a real time operating
system and uses a graphical windowing system based on the uC-OSII RTOS from Micrium
and the emWin graphical stack from Segger.
The system configuration and the standard peripheral settings and configuration are made
through the STM32F2xx Standard Peripheral Library.
Data used by the application is stored in the external USB Flash disk through a FAT file
system (emFile from Segger) in order to save space in the STM32 internal Flash memory.
Figure 5. Firmware architecture
Table 2. Jumper configurations
Jumper Usage Configuration Note
JP5 Ethernet 2 <-> 3 25 MHz clock provided by MCO
JP6 Ethernet 2 <->3 MII interface mode is enabled
JP8 Ethernet Open MII interface mode is enabled
JP19 RTC 2 <-> 3 RTC powered by embedded battery
JP31 USB OTG HS Fitted USB OTG HS selected
SW1 Boot mode 1 <-> 2 STM3220G-EVAL boot from User Flash
SW1 Boot mode 1 <-> 2 STM3220G-EVAL boot from User Flash
MS18180V1
Audio
Player
Camera
Snapshot
Web
Server
Image
Browser
USB Device
Touchpad
Misc:
Calendar, Time,
System Information
Application Layer
GUI Library
DCMI
Flow and Capture
Management
FAT
File System
Ethernet
components:
HTTP, DHCP,
FTP, etc.
USB Device
Stack
USB Host
Stack
Ethernet
Stack
Stacks and Libraries
Misc. apps:
Calendar, Time,
System Monitoring,
System Information
LCD
Touchscreen
Joystick
Control
USB OTG
Low-level driver
Ethernet
Driver
STM32 Standard
Firmware Library
Real-Time Operating System
Driver Layer
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The demonstration application is built using the following software components:
1. STM32F2xx Standard Peripheral Library V1.0.0
2. µC-OSII RTOS (Version 2.86)
3. µC-USB Host stack (Version 3.0)
4. emWin Graphical stack (Version 3.10)
5. emFile file system (Version 4.16 from Segger)
6. LwIP TCP/IP stack (Version1.3.1)
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2 Demonstration architecture overview
The STM3220G-EVAL demonstration consists of seven sub-demos and uses the emWin
graphical stack for the visual aspect, uC-Host stack and uC-FS for media storage in the
connected USB Flash disk; the embedded touch screen is used as an input device (one
touch mode) and the LCD is used in 16-bit color mode.
2.1 Navigation procedure
The STM3220G-EVAL demonstration is an interactive application; the navigation within subdemos is done by a single touch using a pen or finger on the active touch screen.
2.2 Demo startup
The application starts in text mode until the initialization phase is completed.
Figure 6. Startup screen during initialization phase
After initializing the hardware, the involved peripherals and the GUI stacks, the main desktop
displays all the available sub-demos through the icon view widget.
Figure 7. Main desktop (icon view widget)
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2.3 USB console
The USB console frame window shows the USB Host connectivity state. The USB Disk
Flash Connected message means that the USB Flash disk is configured and ready for use.
Figure 8. USB console frame window
2.4 System info
The system info sub-demo is composed of three window frames. The user can use the
forward and back buttons to navigate within the three windows while the Exit button ends the
sub-demo and displays the main menu (Icon view).
The first frame window (Figure 9) shows the hardware and software revisions and the
STM32 hardware resources (RAM and Flash size).
Figure 9. First frame window
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The second frame window (Figure 10) indicates the instant CPU usage in percentage (%);
the graphical widget is updated every second.
Figure 10. Second frame window
The third frame window (Figure 11) shows the different priorities and memory usage of the
running tasks.
Figure 11. Third frame window
The task list is arranged by priority order; the user can click on the Prio tab to invert the
order of the priorities. The memory usage is given in bytes and corresponds to the internal
stack size of the corresponding running task.
Note: The task list is not updated dynamically when a new sub-demo is launched; the user should
exit and launch again the task window by using the forward and back buttons to update the
list of tasks.
2.5 Image browser
The Image browser displays the bitmap (BMP) files stored in the “Images” directory from the
connected USB Flash disk (connected to the USB OTG FS port). The Image browser
automatically resizes the image to fit in the display area.
Figure 12. Image browser
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The user can enable/disable the automatic slide show by clicking on the picture; when the
automatic slide show is enabled, the images are changed every second.
The user can also select the image to show from the list displayed in the right of the Image
browser window frame.
Ta bl e 3 shows the different supported BMP formats.
2.6 Web server
This demonstration is an embedded web server based on the lwIP stack. It allows
addressing the STM3220G-EVAL board as a web page using your web browser to control
the four LEDs on the board and the potentiometer level.
The STM32 Ethernet peripheral is configured in MII mode with speed auto negotiation and
the Clock for the external PHY is provided by the STM32 through the MCO pin.
Figure 13. Web server DHCP server reply
The web server sub-demo supports the DHCP protocol and, if the DHCP is enabled in the
host side, an automatic IP address is assigned to the board; otherwise, a static IP address is
used instead (192.168.0.8).
Table 3. Supported bitmap formats
Bits per pixel Indexed Compression Supported
1YesNoYes
4YesNoYes
4 Yes Yes Yes
8YesNoYes
8 Yes Yes Yes
16 No No Yes
24 No No Yes
32 No No Yes
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How to use the web server demonstration
1. Ensure that the jumper configuration on your STM3220G-EVAL board is correct (refer
to Table 2: Jumper configurations on page 7).
2. Modify your PC network configuration:
a) Disable the Internet firewall installed on your PC (if it is enabled) and
bypass/deselect any proxy server in use.
b) Set your PC network card “Speed & Duplex” property to “Auto Navigation”: under
Windows, select Control Panel > Network Connections > Local Area
Connection > Properties > Configure > Advanced > Speed & Duplex.
Figure 14. Connection properties screen
c) If the DHCP is not supported, change your PC IP address to 192.168.0.x (x
different from 8). To do this, under Windows, select Control Panel > Network
Connections > Local Area Connection > Properties > Internet Protocol
(TCP/IP) > Properties > and use the following IP address.
Figure 15. TCP/IP properties screen
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d) If the DHCP is supported, enable the DHCP and the STM3220G-EVAL board will
automatically acquire an IP address.
Figure 16. Connection status screen
3. In point-to-point configuration, connect your PC to the STM3220G-EVAL board using
an Ethernet cross cable.
4. In a local network, connect the STM3220G-EVAL board to the network hub using an
Ethernet regular cable.
5. Ping the board by typing in the DOS command window: “ping xx.xx.xx.xx” where
xx.xx.xx.xx is the DHCP or the statically assigned IP address.
6. In your internet browser, type “http:// xx.xx.xx.xx” to load the STM32 web page.
7. Now you can turn on/off the four LEDs on the STM3220G-EVAL board.
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2.7 USB joystick
The HID example uses the joystick embedded in the STM3220G-EVAL evaluation board.
The HID example works in High Speed mode (the USB OTG HS connector is used).
Figure 17. HID properties screen
Once connected and correctly configured, the STM3220G-EVAL board acts as a USB HID
joystick device and the user can move the mouse pointer on the Host by using the Up, Left,
Down and Right buttons.
Figure 18. USB joystick status screen
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2.8 Audio player
The audio player retrieves the WAV files stored in the “Audio” directory in the connected
USB Flash disk (connected to the USB OTG FS port).
Figure 19. Audio player diagram
The user can Stop/Play/Resume/Go Back/ Forward and Mute the audio sample and can
select the title to be played directly from the playlist.
Figure 20. Audio player interface
The user can use a headset or the embedded speaker to output the audio sample. The
peripheral is detected automatically: when the headset is removed, the speaker is
automatically used. The audio player supports all WAV PCM audio files with the
configuration listed in Ta bl e 4 .
Note: This limitation is due to the audio codec used on the STM3220G-EVAL board which accepts
a fixed Master Clock frequency while the STM32F2xx I2S provides a Master clock at a fixed
rate of 256 x f
S
(where fS is the audio sampling rate). It is recommended to use the headset
when listening to audio files with a sample rate below 32 Hz, and use a headset or speaker
for other audio files.
Table 4. Audio file configurations
Parameter Value
Sample rate 8 to 96 kHz
Channel number Stereo/Mono
Audio Data Format 16 bits
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2.9 Analog clock
The analog clock window shows the system clock (RTC) on an analog background, and also
the current date on the caption of the frame window.
Figure 21. Analog clock window
To configure the clock and the date, the user can click the Set button to display a second
frame window with a numerical pad used to easily set the clock and the date.
Figure 22. Analog clock configuration window
The date and the clock display use the following format.
Figure 23. Analog clock date and time format
If the format is not correct, an error message (Figure 24) is displayed and the user should
re-enter a valid value.
Figure 24. Analog clock error message
Time: hh:mm:ss
Date: dd\mm\yyyy
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2.10 Camera
The camera demo obtains raw data from the camera module and displays it on the LCD
through the GUI core.
Figure 25. Camera diagram
The user can use the capture button to take a snapshot of the video and display only a
single frame on the LCD. Pressing again the capture button restores the continuous display
mode.
Figure 26. Capture screen
2.11 Sub-demo interaction
Due to the intensive CPU use of some parts of the application (GUI refresh and access to
the USB Flash disk), some sub-demos cannot be run at the same time.
In order to reduce this interaction and reduce the time needed by the GUI to refresh the
displayed windows, only the USB Console window and the clock are allowed to run when
the Audio Player is running. This is considered as an “exclusive” sub-demo, which means
that the user cannot run the Audio Player and another sub-demo at the same time. When
the user attempts to launch an exclusive sub-demo, a message box is displayed to inform
the user that an exclusive sub-demo is already running.
Video frame
Slider to change
brightness
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3 Programming the demonstration
Normally, the STM3220G-EVAL demo is included with the board and the necessary
accessories described in Section 1.2.1: Required accessories. However, the user can
program the board by using the binary file included with the demo package (in the \Binary
folder).
Note: Demonstration binary files are provided also for the legacy STM3220F-EVAL board Rev. A.
“_vx_y_z” in the file name refers to the version of the demonstration firmware.
You can program the demonstration using either the EWARM or the Bootloader method.
Using the EWARM (v6.10 and later) preconfigured project
1. Open the EWARM\Flash_Loader.ewd workspace.
2. Open Project > Download > Download file, and select the *.out file to program:
– Load the Binary\STM3220G-EVAL_FW_vx_y_z.out file for the STM3220G-EVAL
Rev. B
– Load the Binary\STM3220F-EVAL_FW_vx_y_z.out file for the STM3220F-EVAL
Rev. A
3. Once the binary is programmed, remove the JTAG probe and restart the board.
Using the Bootloader
Depending on the Bootloader serial interface you are using, you have to proceed as follows:
1. For USART or CAN interfaces:
a) Load the Binary\STM3220G-EVAL_FW_vx_y_z.bin file for the STM3220G-EVAL
Rev. B
b) Load the Binary\STM3220F-EVAL_FW_vx_y_z.bin file for the STM3220F-EVAL
Rev. A
2. For USB FS Device mode (DFU) interface:
a) Load the Binary\STM3220G-EVAL_FW_vx_y_z.dfu file for the STM3220G-EVAL
Rev. B
b) Load the Binary\STM3220F-EVAL_FW_vx_y_z.dfu file for the STM3220F-EVAL
Rev. A
3. Once the binary is programmed, configure the boot pins to the “Boot from Flash”
position and restart the board.
For more information about the STM32F2xx Bootloader, please refer to AN2606, STM32
microcontroller system memory boot mode.
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4 Revision history
Table 5. Document revision history
Date Revision Changes
20-Apr-2011 1 Initial release.
10-May-2011 2
Updated document for STM3220G-EVAL (Rev. B) evaluation board
only.
16-Nov-2012 3
Added STM3221G-EVAL to the title and the Introduction.
Fixed a few typos, among them a list numbering in How to use the
web server demonstration.
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