Digilent 6003-410-000P-KIT - Manual (Page 109)

XUP Virtex-II Pro Development System www.xilinx.com 109
UG069 (v1.0) March 8, 2005 1-800-255-7778
Processor-Based Tests R
AC97 Audio Test
This test begins when “3” is selected from the BIST Main Menu. It verifies the operation of
the AC97 CODEC for three different modes as selected by the user from the AC97 Audio.
Test Menu shown in
Figure D-15 .
1. Digital Passthrough – the CODEC is configured to pass the data from the input
channels (line-in, mic-in) directly to the output channels (line-out, amp-out).
2. FIFO Loopback – data from the CODEC’s line-in is read into the FPGA, then sent back
out to the CODEC to be played on the output channels (line-out, amp-out).
3. Game Sounds – data stored in memory on the FPGA is sent to the CODEC to be played
on the output channels (line-out, amp-out).
Additional Hardware Required
• Audio cable that connects the line-out of a PC or other audio source to the line-in on
the XUP Virtex-II Pro Development System
•
Headphones or speakers connected to the line-out or amp-out jack on the XUP
Virtex-II Pro Development System
• Audio sample ready to be played from the PC or other audio source
Digital Passthrough Test Procedure
1. Select “1" from the AC97 Audio Test Menu.
2. Begin playing the audio from the PC (or other audio source).
3. The sound should be heard out the headphones (or speakers) for about 10 seconds.
4. The terminal window output for the Digital Passthrough test is shown in Figure D-16 .
Figure D-15: Selecting the Specific AC97 Audio Test