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** Copyright © 2006, Xilinx, Inc. 
** This design is confidential and proprietary of Xilinx, Inc. All Rights Reserved.
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** /___/  \  /   Vendor: Xilinx 
** \   \   \/    Version: 1.0
**  \   \        Filename: test_ac97_readme.txt 
**  /   /        Date Last Modified: 8/31/2006 
** /___/   /\    Date Created: 8/31/2006 
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**Device: 
**Purpose:
**Reference: 
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Application:  test_ac97
-----------------------
A recording of the audio input provided by the user on either the Line In
or Mic In audio port is made, and then played out through the Line Out
audio port.
 
   CONFIG Switch Settings:  00010101 

1. Connect the Host PC to the ML501 (J1 header) using a PC-IV or
   Platform USB JTAG cable

2. Connect the Host PC serial port to the ML501 serial port using a null
   modem cable and launch a terminal program on the Host (eg. TeraTerm)
   with the settings: 9600 baud, 8-N-1, No flow control

3. Connect the ML501 to a DVI monitor or to a VGA monitor with the
   appropriate adapter 

4. Attach a set of speakers to the Line Out audio port

5. Attach a microphone to the Mic In audio port

6. Insert the production ML501 CF card and power-up the board 

7. Launch and open the ML501 EDK project (system.xmp)

8. Launch a Shell window using XPS menu selection: Project > Launch EDK Shell

9. Download bitstream in shell window by typing: impact -batch etc/download.cmd

10. XPS menu selection: Debug > Launch XMD

11. At XMD% prompt type: cd microblaze_0/code

12. At XMD% prompt type: rst

13. At XMD% prompt type: dow test_ac97.elf

14. At XMD% prompt type: con

15. In the terminal window associated with the serial port, answer the
    "Sound loopback..." question with M. Additional messages
    will be sent to the serial port
16. Speak into the microphone

17. A copy of the audio input should be heard on the Line Out audio output port 


Serial Port Output:
-------------------
Start INIT
Reset Done
PowerDown Reg State (Should be 0x000F) = F
Turning on External Power Amp


Sound loopback. Do you want to loopback Line in or Mic (L,M)
DAC sample rate= 0 hz
ADC sample rate= 0 hz
vendor id 1= 4144
vendor id 2= 5374
Extended Audio ID= 605
PowerDown Reg State (Should be 0x000F) = F
Misc Control Bits = 10
General Purpose reg state = 0
config reg state = 7000
Record Start
Play Start