readme.txt

ADSP-BF53３视频输出程序

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

ADSP-BF533 EZ-KIT Lite Video Output Example

Analog Devices, Inc.
DSP Division
Three Technology Way
Norwood, MA 02062

Date Created:	3/17/03

____________________________________________________________________________________________________

This directory contains an example ADSP-BF533 video output project that initializes SDRAM memory, 
sets up the DMA configuration registers to DMA data from SDRAM to the PPI, and configures the PPI 
port for ITU-656 output transmit mode.


Files contained in this directory:

video_output.dpj				VisualDSP++  project file
config_dma.asm				assembly file for setting up DMA configuration registers
config_ppi.asm				assembly file for setting up the PPI port
main.asm				assembly file for calling all setup subroutines
Reset_ADV.asm				assembly file for resetting the ADV7171
sdram_init.asm				assembly file for initializing SDRAM control registers
startup.asm				assembly file for initial startup conditions
videograph.asm				assembly file to generate NTSC color bar pattern
readme.txt				this project description file
ADSP-BF533_asm.ldf			linker description file
flash_config.h				
startup.h
____________________________________________________________________________________________________


CONTENTS

I.	FUNCTIONAL DESCRIPTION
II.	IMPLEMENTATION DESCRIPTION
III.	OPERATION DESCRIPTION


I.    FUNCTIONAL DESCRIPTION

The video output demo demonstrates the initialization of SDRAM memory, the generation of an NTSC 
color bar pattern, and the use of the DMA and PPI to output the color bar pattern.
 
This example utilizes SDRAM memory to store the color bar pattern data.  Upon completion of 
generating the data, the program sets up the DMA and PPI configuration registers for output, 
transmit mode, autobuffer, mode.


II.   IMPLEMENTATION DESCRIPTION

The main file calls:

1. the setup_sdram subroutine to initialize SDRAM memory, 
2. the _NtscVideoOutFrameBuffInit subroutine to generate the color bar pattern data and store in
   SDRAM memory, 
3. the config_dma subroutine to setup autobuffer, 2-D, 16-bit transmit DMA, and 
4. the config_ppi subroutine to configure the PPI port for 656 output mode. 


III.  OPERATION DESCRIPTION

- Open the project "video_out.dpj" in the VisualDSP Integrated Development Environment (IDDE).
- Under the "Project" tab, select "Build Project" (program is then loaded automatically into DSP).
- Connect a video display monitor to the video output jack on the ADSP-BF533 EZ-KIT Lite (See
  ADSP-BF533 EZ-KIT Lite Manual and schematics for more details on the connectors).
- Select "Run" from the "Debug" tab on the menu bar of VisualDSP.
- See the color bar pattern displayed on the video monitor.