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Introduction
The STEV
AL-ILL059V1 is a high brightness LED array driver evaluation board with diagnostics based on the STAP16DPS05
low voltage 16-bit constant current LED sink driver for automotive applications.
The LED driver is configured and controlled through an 8-bit automotive grade STM8A microcontroller via SPI interface. The
A5974D automotive grade DC-DC converter provides the necessary voltage and power for all the board functions.
The package includes a GUI that helps you evaluate the features of the LED driver and download your own application firmware
onto the board through the SWIM interface.
Figure 1. STEVAL-ILL059V1 LED array driver evaluation board
High brightness LED array driver with diagnostics for automotive applications
based on ST
AP16DPS05 and STM8A
UM2554
User manual
UM2554 - Rev 1 - February 2019
For further information contact your local STMicroelectronics sales of
fice.
www.st.com
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1 Overview
The package consists of the following elements:
•
A STEVAL-ILL059V1 evaluation board
• An RS232-USB bridge daughterboard
• Dedicated GUI software
• User documentation
Figure 2. Block diagram of STEVAL-ILL059V1 evaluation board
The STEVAL-ILL059V1 evaluation board includes a DC input power supply, an 8-bit microcontroller and a SWIM
connector to program the microcontroller
, 32 white LEDs and user interface buttons and potentiometers to control
the two STAP16DPS05 LED drivers (each driver controls 8 LEDs
The evaluation board can operate in the following modes:
1. Standalone Mode: the board is controlled via on-board push buttons and potentiometers
2. GUI Mode: is activated when the board is connected to a PC, and lets you control the board through the GUI
The package includes an RS232-USB daughterboard that supports full-duplex communication between USB and
UART interfaces, thus allowing communication with the PC GUI via USB. The daughterboard connected is
powered by the main board through the UART and SWD connector.
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Figure 3. STEV
AL-ILL059V1 evaluation board (top)
1. 6–24 V DC power supply with reverse voltage protection and short-circuit protection, standard DC jack input
2. A5974D automotive grade switching regulator for automotive applications
3. LF33: 3.3 Volt linear voltage regulator for automotive applications
4. STM8AF6266 8-bit microcontroller for automotive applications
5. Backwards and forwards button switches
6. Reset switch
7. SWIM connector to program and debug microcontroller firmware
8. Connector for LIN development and evaluation
9. Brightness control potentiometer
10. Speed control potentiometer
11. STAP16DPS05 constant current LED driver
12. 32 white LEDs (PLCC 4)
13. 8 jumpers, to simulate open-circuit error
14. 3 jumpers, to simulate short-circuit error
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Figure 4. STEV
AL-ILL059V1 evaluation board (bottom)
15. Slot for USB to UART daughterboard
15
Figure 5. RS232-USB bridge daughterboard (top)
1. Mini-B type female USB connector
2. SWD connector (for programming daughter board)
3. Connector for UAR
T communication between main board and daughter board
4. ESDAULC6-3BP6 ESD protection for high speed interfaces
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Figure 6. RS232-USB bridge daughterboard (bottom)
5. STM32F103C8T7 32-bit microcontroller
6. 16 MHz crystal
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1.1 Operating modes
1.1.1 Standalone Mode
In standalone Mode, the STEVAL-ILL059V1 evaluation board is not connected to a PC via the RS232-USB
interface board. In this mode, you can perform the following actions:
•
run default LED demo patterns
• use two on-board buttons to scroll back and forth between the demo patterns
• use two on-board potentiometers to gradually change the brightness (average maximum LED current) and
speed of the patterns
• simulate error conditions and detection using open-circuit and short-circuit jumpers
• use the reset button to reset the microcontroller and return to the first demo pattern
Note: The board immediately starts with brief animation on the LED matrix when DC power is supplied. You can
control the board after the animation.
1.1.2 GUI Mode
To control the board using the GUI, use the USB to UART bridge as an interface between the evaluation board
and your PC. The bridge supports bi-directional communication.
The GUI allows the following control, programming and monitoring activities:
•
Basic actions:
– all the actions in standalone, but controlled from the GUI
– switch individual LEDs on and off, and adjust their brightness
– switch all LEDs on and off at once
– adjust the brightness of all the LEDs at once
• Use the four preset programs to quickly view how frame programming works on the evaluation board
• Build your own programs to display any pattern of up to 20 frames, with the following settings:
– transition time between the frames
– frame count of the number of frames in your program
– brightness slider to configure the brightness of each frame
• Monitor error detection on the GUI at the following rates:
– once only
– every 0.5 seconds
– every 1 second
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2 Sample firmware demos
2.1 LED demo patterns
Alphanumeric text in flashing mode demo
In the alphanumeric text in flashing mode demo, the letters “ST” flash in the LED matrix; the flashing rate is
adjustable, but the brightness potentiometer remains inactive in this mode.
Figure 7. Flashing text demo
Curtain pattern
Figure 8. All LEDs on during curtain pattern
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Random pattern
Figure 9. Random pattern 1
Figure 10. Random pattern 2
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Figure 11. Random pattern 3
Figure 12. Random pattern 4
2.2 Error detection demonstration
In the error detection demo, the drivers perform open-error detection and short-error detection simultaneously. If a
defective LED is found, it is signaled by lighting the corresponding LED in the row below for an open circuit fault
and on the left for a short-circuit fault.
On the board, open and short-circuit errors are simulated using open and short jumpers, respectively
. The
following table shows how each jumper provokes a specific fault, and how the fault is signaled on the LED array.
Table 1. Error detection jumper table
Jumper Required action Fault type Error in LED Shown on LED
J7 Place jumper Short D30 D26
J8 Place jumper Short D31 D27
J9 Place jumper Short D32 D28
J10 Remove jumper Open D1 D2
J11 Remove jumper Open D5 D6
J12 Remove jumper Open D9 D10
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Jumper Required action Fault type Error in LED Shown on LED
J13 Remove jumper Open D13 D14
J14 Remove jumper Open D17 D18
J15 Remove jumper Open D21 D22
J16 Remove jumper Open D25 D26
J17 Remove jumper Open D29 D30
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3 How to use the GUI
3.1 GUI setup procedure
Step 1. Run the setup (.exe) file on your Windows computer
.
On successful installation, the STAP08DP05 Demo software appears in your list of programs.
Step 2. Install the VCP driver (if it is not already present): …\Program Files\ STMicroelectronics\LED Driver
Demo\ST VCP Driver.
Both 32-bit version and 64-bit version are included in the setup.
Step 3. Launch the GUI software.
Figure 13. LED Driver Demo Application main screen
Step 4. Connect the evaluation board to the PC and supply power to the board.
Step 5. Press the [Connect] button in the GUI.
–
If the GUI identifies the board, the GUI automatically connects with the board
– If the GUI does not identify the board, choose the correct port from the dropdown list and press
[Select].
A “Port is open” message is displayed when the GUI is able to interact with the board.
3.2 How to use the Basic Mode functions
Basic Mode includes button control, error detection, brightness control and channel switching sections.
Step 1. In the left panel, select the [Basic Mode] button.
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Figure 14. Basic Mode functions
Step 2. In the
[Button Control] area, use the [←] and [→] arrow buttons to toggle through the preconfigured
demos available in the firmware.
You can use the [Enable] or [Disable] buttons to enable or disable the physical interface controls
available on the board.
Step 3. In the [Error Detection] section, select an error checking frequency.
– [No Loop]: error detection is performed once and the results are displayed
– [0.5 Sec Loop]: error detection is performed every 0.5 s
– [1 Sec Loop]: error detection is performed every 1 s
Figure 15. Error Detection options
Step 4. In the
[Brightness control for channel switching] and [Channel Switching] sections, set individual
channels on and off, and control the brightness of the LEDs that are on with the slider.
The brightness is divided into 256 incremental levels.
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3.3 How to use the Frame Programming functions
Frame programming allows you to define and run your own LED sequence programs on the evaluation board.
Step 1. In the left panel, select the [Frame Programming] button.
Figure 16. Frame Programming functions
Step 2. Choose how you want to create your frame:
–
In the 8x4 array of circles, toggle the desired LEDs on and off to represent your pattern for a
single frame.
– Alternatively, you can load a preconfigured LED sequence from one of those available in the
[Load Presets] section
Step 3. Use the [Frame Brightness] slider to adjust the brightness of the LEDs for the frame.
Step 4. Set the total number of frames you want in your sequence in the [Frame Count] box.
There can be maximum of 20 frames (00 to 19).
Step 5. Use the [←] and [→] arrows to move between the frames in your program.
Step 6. Press the [►] button to run your sequence of frames in the GUI.
Step 7. Set the required time between frames in the [Transition Time (ms)] box.
Step 8. Press [Program] to download your design onto the evaluation board.
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4 Thermal behavior
Below are the thermal images around the TSM8 microcontroller and around the LED drivers and LED array at the
maximum current of 20 mA in all channels.
Figure 17. STEV
AL-ILL059V1 thermal image 1
Figure 18. STEV
AL-ILL059V1 thermal image 2
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5 Schematic diagrams
5.1 STEVAL-ILL059V1 schematics
Figure 19. STEV
AL-ILL059V1 schematics - power
Figure 20. STEV
AL-ILL059V1 schematics - MCU
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Figure 21. STEV
AL-ILL059V1 schematics – open circuit jumpers
Break
Figure 22. STEV
AL-ILL059V1 schematics – short circuit jumpers
Figure 23. STEV
AL-ILL059V1 schematics - connectors
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5.2 STAP16DPS05 schematics
Figure 24. STEV
AL-ILL059V1 schematics – STAP16DPS05 LED driver section
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5.3 RS232-USB schematics
Figure 25. RS232-USB schematics – USB section
Figure 26. RS232-USB schematics – STM32 section
Figure 27. RS232-USB schematics – USB to UART connector
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Revision history
T
able 2. Document revision history
Date Version Changes
15-Feb-2019 1 Initial release.
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Contents
1 Overview ..........................................................................2
1.1 Operating modes...............................................................6
1.1.1 Standalone Mode ........................................................6
1.1.2 GUI Mode ..............................................................6
2 Sample firmware demos ...........................................................7
2.1 LED demo patterns .............................................................7
2.2 Error detection demonstration ....................................................9
3 How to use the GUI ...............................................................1
1
3.1 GUI setup procedure ..........................................................11
3.2 How to use the Basic Mode functions.............................................11
3.3 How to use the Frame Programming functions .....................................12
4 Thermal behavior .................................................................14
5 Schematic diagrams ..............................................................15
5.1 STEVAL-ILL059V1 schematics ..................................................15
5.2 STAP16DPS05 schematics .....................................................17
5.3 RS232-USB schematics........................................................18
Revision history .......................................................................19
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List of figures
Figure 1. STEV
AL-ILL059V1 LED array driver evaluation board ......................................... 1
Figure 2. Block diagram of STEVAL-ILL059V1 evaluation board .........................................2
Figure 3. STEVAL-ILL059V1 evaluation board (top) ................................................. 3
Figure 4. STEVAL-ILL059V1 evaluation board (bottom)...............................................4
Figure 5. RS232-USB bridge daughterboard (top)................................................... 4
Figure 6. RS232-USB bridge daughterboard (bottom) ................................................5
Figure 7. Flashing text demo .................................................................7
Figure 8. All LEDs on during curtain pattern .......................................................7
Figure 9. Random pattern 1 ..................................................................8
Figure 10. Random pattern 2 ..................................................................8
Figure 11. Random pattern 3 ..................................................................9
Figure 12. Random pattern 4 ..................................................................9
Figure 13. LED Driver Demo Application main screen ............................................... 11
Figure 14. Basic Mode functions .............................................................. 12
Figure 15. Error Detection options .............................................................12
Figure 16. Frame Programming functions ........................................................13
Figure 17. STEVAL-ILL059V1 thermal image 1 .................................................... 14
Figure 18. STEVAL-ILL059V1 thermal image 2 .................................................... 14
Figure 19. STEVAL-ILL059V1 schematics - power .................................................. 15
Figure 20. STEVAL-ILL059V1 schematics - MCU................................................... 15
Figure 21. STEVAL-ILL059V1 schematics – open circuit jumpers ........................................ 16
Figure 22. STEVAL-ILL059V1 schematics – short circuit jumpers ........................................ 16
Figure 23. STEVAL-ILL059V1 schematics - connectors............................................... 16
Figure 24. STEVAL-ILL059V1 schematics – STAP16DPS05 LED driver section ..............................17
Figure 25. RS232-USB schematics – USB section .................................................. 18
Figure 26. RS232-USB schematics – STM32 section ................................................18
Figure 27. RS232-USB schematics – USB to UART connector.......................................... 18
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List of tables
T
able 1. Error detection jumper table ............................................................ 9
Table 2. Document revision history .............................................................19
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IMPORTANT NOTICE – PLEASE READ CAREFULLY
STMicroelectronics NV and its subsidiaries (“ST”) reserve the right to make changes, corrections, enhancements, modifications, and improvements to ST
products and/or to this document at any time without notice. Purchasers should obtain the latest relevant information on ST products before placing orders. ST
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ST and the ST logo are trademarks of ST. All other product or service names are the property of their respective owners.
Information in this document supersedes and replaces information previously supplied in any prior versions of this document.
© 2019 STMicroelectronics – All rights reserved
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