readme.txt

ADI 公司的DSP ADSP21369 EZ-KIT LITE开发板的全部源代码

-------------------------------------------------------------------------------
Example: Talkthru Digital In-Digital Out (P8=Input, P9=Output)
Target:   ADSP-21369
Date:     July 18, 2005
Tools:    VisualDSP++ 4.0
Hardware: ADSP-21369 EZ-KIT LITE
-------------------------------------------------------------------------------

Stereo talk-through (stereo in -> four stereo pairs out)

TalkThrough reads audio samples from the on-chip SPDIF receiver and it
passes the unmodified data through to the SPDIF transmitter.
Each interrupt reads a single 24-bit sample (alternating left and right) using
SPORT0 and immediately writes the same value to the A data channel of SPORT3.
All audio is transmitted in I2S mode.  An MCLK is derived from the SPDIF input
stream, as well as the bit clock and the frame sync. All are driven to the SPDIF
transmitter.

-------------------------------------------------------------------------------
Instructions: Download the executable to the EZ-KIT.  There are no user
controls or visual outputs.
-------------------------------------------------------------------------------
Source Files contained in this directory:
21369_IVT.asm        Interrupt vector table code
ADSP-21369-EZKIT.ldf Linker description file
main.asm             Calls initialization routines then waits for interrupts
initSRU.asm          Initializes the SRU & DAI/DPI pins
initPLL_SDRAM.asm    Configures the DSP to run at CCLK= 393.21 MHz & SDCLK= 157.28 MHz
initSPORT.asm        Initializes the transmit and receive serial ports
initSPDIF.asm        Initializes the SPDIF receiver & transmitter
SPORTisr.asm         The interrupt service routine
Talkthru Analog In-Out.dpj    VisualDSP Project File
-------------------------------------------------------------------------------
Dependencies contained in VisualDSP++ default include path:
def21369.h             Header with constants for the SHARC
SRU.h                  Macro to simplify programming the SRU & DAI/DPI pins
*******************************************************************************
Analog Devices, Inc.
DSP Division
One Technology Way
Norwood, MA 02062

(c) 2005 Analog Devices, Inc.  All rights reserved.
*******************************************************************************