/******************************************************************************

This ZIP File is associated with Rev 1 of the Application Note

	Connecting Blackfin Processors to the AD7656 SAR ADC (EE-321)


that can be found at http://www.analog.com/ee-notes.


Date Created:	March 25th, 2008

	

*******************************************************************************

All code examples have been written and tested with 

VisualDSP++ 4.5 January 2008 update

ADSP-BF537 EZ-Kit Lite Rev 1.3 (silicon rev 0.2)

******************************************************************************/

This directory contains example of the ADSP-BF537 program that acquires samples
from AD7656 and performs a complex FFT routine.

Files contained in this directory:

readme.txt			this file
Blackfin-AD7656_CIB.pdf		Custom Interface Board (CIB) schematic
Blackfin-AD7656_CIB_bom.csv	CIB Bill of Materials
CIB_Gerbers.zip			CIB Gerber files
AD7656_ADSP-BF537.zip		VisualDSP++ files and DesignNotes.doc file

_______________________________________________________________________________


Project Type:
=============
    ADSP-BF533 [ ]
    ADSP-BF537 [x]
    ADSP-BF548 [ ]
    ADSP-BF561 [ ]

Hardware/Tools Used:
====================
    ADSP-BF537 EZ-Kit Lite Rev 1.3
    Analog Devices VisualDSP++ 4.5
    ADDS HPUSB-ICE

CONTENTS

I.   FUNCTION/ALGORITHM DESCRIPTION
II.  IMPLEMENTATION DESCRIPTION
III. OPERATION DESCRIPTION
        

I. FUNCTION/ALGORITHM DESCRIPTION

Development environment for interfacing AD7656 6-channel SAR ADC to BF537 EZKIT
Lite.


II.   IMPLEMENTATION DESCRIPTION

Hardware documents and reference Software package. AD7656 is under SW control
mode; ADC acquires samples on all 6-chennals with Blackfin DSP performing an
FFT functions on a single channel.


III.  OPERATION DESCRIPTION

1. Connect +12V,-12V to the respective power terminals of the AD7656 EVM.
	Connect +3.3V (could be sourced from the BF537 EZKit) to a Vdrive
	terminal of the EVM.

2. On BF537 EZKit, connect P12 pin 3 to P8 pin 6 to generate CONVSTA signal
	(please see DesignNotes.doc for more details).
 
3. Connect a signal source to the first channel input of the AD7656 EVM.

4. Open the VisualDSP++ project AD7656_ADSP-BF537.dpj.

5. Under 'Session->Select Session', select the ADSP-BF537 ADSP-BLACKFIN
	Family Platform session.

6. Under 'File->Workspace->Open', select the workspace file (browse to):
	<Project Directory>/debug/AD7656_ADSP-BF537.vdw

7. Under 'Project' tab, select 'Build Project'.  This will automatically 
	load the executable.

8. Select 'Run' from the 'Debug' tab on the menu bar.

9. Observe the FFT output plot in the VisualDSP++ plot window.
