D01-501106-01 Rev B
DSVGA Design Reference Board Manual
17
7. TROUBLESHOOTING
Communication Issues
COM Port issues
Error message comes up after COM port selection and attempt to read the
registers (Read button under register table)
Read/Write issues
Register read results in FF values in all registers
Register read stops partway through the register table
Register write stops partway through the register table
Color bars on display
The color bars display on the screen indicates an issue with the video source. The
DRK firmware does not detect a valid Vsync signal and configures the DSVGA
microdisplay to display a color bar pattern.
Check the video source (format) and connection
No light /No Image on display
Check second monitor video format and configuration
If the second monitor background is set to black, so will the display.
Check registers for DISPMODE, IDRF, DIMCTL
In the main application tab, click on the Load Defaults button, then on the Write
button (left of the Load Defaults button). This will ensure working settings have been
written to the display. The display should then reproduce the image seen on the host
computer screen.
If the file DSVGA.txt does not exist in the folder where the Windows app
resides, launch Notepad and copy the values listed below under Default Settings, one
value per line. Save the file as a text file with the name DSVGA. Make sure it is in the
same folder as the S04-501058-00-DSVGA_SW.exe file.
Close the app if it is open. Make sure the DRK board is turned on and cables connected,
then launch the app. Click on the Load Defaults button located at the bottom right of the
GUI window. Then click on the Write button located to the left of the Load Defaults
button, below the register list.
Default Settings
01
20
70
00
00
00
00
80
80
