readme.txt

本程序为调试ADI BF533DSP串行口通讯功能的小程序

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ADSP-BF533 EZ-KIT Lite UART Example

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

Date Created:	04/03/03 

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This directory contains an example ADSP-BF533 UART Example Project.
The example illustrates autobaud detection and UART polling and interrupt
operation.

Files contained in this directory:

uart.dpj			VisualDSP++ project file
uart.mak			Make file
main.asm			Main assembly source file
uartlib.asm			Assembly library file containing some UART subfunctions
uartlib.h			.extern directives for uartlib.asm library functions
sicnames.h			some more SIC register and bit names
readme.txt			this file
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CONTENTS

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


I.    FUNCTIONAL DESCRIPTION




II.   IMPLEMENTATION DESCRIPTION
The Blackfin replies with a string send by polling operation. It returns
also the calculated UART divisor latch value of the DLH:DLL register pair.
Furthermore it sends another string using interrupt mode. Afterward it 
performs simple echo operation based on RX interrupts. Every received
character will be sent back to the TX line.



III.  OPERATION DESCRIPTION

- Open the project "uart.dpj" in an ADSP-BF533 EZ-KIT Lite session in the VisualDSP Integrated 
  Development Environment (IDDE).
- Under the "Project" tab, select "Build Project" (program is then loaded automatically into DSP).
- Connect the EZ-KIT to the PC using a 1:1 EIA-232 serial cable.
- Invoke any terminal program, for example the Windows Hyperterminal. Choose any bit rate you 
  like, but make sure that you use 8-bit, no parity format. Don't use any handshake, such as 
  XON/XOFF software handshake or RTS/CTS hardware handshake! Also make sure echo mode is off.
  If using Hyperterminal this can be done by selecting Properties from the file menu and clicking 
  on the ASCII Setup button from the Settings tab.  
- Once terminal connection is established, select "Run" from the "Debug" tab on the menu bar 
  of VisualDSP.
- Press the '@' key (ASCII 0x40) in the terminal program to start autobaud detection.
- See the character echo back in the terminal program.