User Guide DA7212_Rev1v2 CONFIDENTIAL
Page 28 of 34
User Guide
DA7212 User Guide – Rev1.2
Troubleshooting
This section is an aid to resolving problems occurring in the previous sections.
Software Issues
The USB device should install without difficulty automatically. Make sure that
the installation finds and uses the driver contained in the USB memory stick.
If the program is started before the USB Interface board is plugged in, the
program will default to the offline mode. It can be useful to familiarise yourself
with the software in a desk environment without the hardware attached. If the
board is subsequently attached, move the Interface control to “USB”. Make
sure the USB is connected and then restart the program.
The software is optimized for a display screen size of 1024 by 768 pixels or
greater, with Fonts set to Normal (96dpi).
There have been reported issues of unpredictable display effects when large
fonts (120dpi) are used. This can be changed by right-clicking on the
desktop, select Properties. Select the Settings tab, select Advanced, then
Normal size from the drop-down box.
If communications are apparently
lost, first press the “Start Device” button.
This attempts to make the device go active.
Also switching the “Interface mode” to Offline, then back to USB can
reinitialize the USB interface. Last resort is to unplug the USB then reconnect.
The software will detect this and reinitialize.
Hardware Issues
Most hardware problems can be traced to incorrect jumper positions.
Check carefully jumper positions by comparing them with the default positions
on page 7. Use the jumper table details and the board schematic as a guide to
the jumper functions and locations.
Selecting USB playback
The dialog DA7212 EVB coupled with the digital IO board allows a number of
audio sources to be selected with ease for testing and evaluation. One
example is to stream audio from a PC to the EVB over USB, This can easily
be done in the following way.
