Audio_Codec_Talkthrough_TDM.rar_audio TDM_音频 TDM

_______________________________________________________________________________ ADSP-BF533 EZ-KIT Lite C Based AD1836 TALKTHRU Analog Devices, Inc. DSP Division Three Technology Way P.O. Box 9106 Norwood, MA 02062 Date Created: 04/03/03 _______________________________________________________________________________ This directory contains an example ADSP-BF533 subroutine that demonstrates the initialization of the link between SPORT0 on the ADSP-BF533 and the AD1836 stereo Codec. This is done by initializing the link in TDM mode and implementing a simple talk-through routine. Files contained in this directory: readme.txt this file main.c C file containing the main program and variable declaration Initialize.c C file containing all initialization routines ISR.c C file containing the interrupt service routine for SPORT0_RX Process_data.c C file for processing incoming data Talkthrough.h C header file containing prototypes and macros C_Talkthrough_TDM.dpj VisualDSP++ project file _______________________________________________________________________________ CONTENTS I. FUNCTIONAL DESCRIPTION II. IMPLEMENTATION DESCRIPTION III. OPERATION DESCRIPTION I. FUNCTIONAL DESCRIPTION The Talkthru demo demonstrates the initialization of SPORT0 to establish a link between the ADSP-BF533 and the AD1836 Codec. The program simpley sets up the SPI port to configure the AD1836 codec to TDM mode. SPORT0 is then setup to receive/transmit audio samples from the AD1836. Audio samples received from the AD1836 are moved into the DSP's receive buffer, using DMA. The samples are processed by the ADSP-BF533 and place in the transmit buffer. In turn, the transmit buffer is used to transmit data to the AD1836. This results in a simple talk-through where data is moved in and out of the DSP with out performing any computations on the data. II. IMPLEMENTATION DESCRIPTION The Initialization module initializes: 1. EBIU setup 2. Flash setup 3. SPI setup to initialize AD1836 codec 4. SPORT0 setup 5. DMA setup 6. Interrupt configuration III. OPERATION DESCRIPTION - Open the project "C_Talkthrough_TDM.dpj" in the VisualDSP Integrated Development Environment (IDDE). - Under the "Project" tab, select "Build Project" (program is then loaded automatically into DSP). - Turn pin 5 and 6 of SW9 on the ADSP-BF533 EZ-KIT Lite OFF; these will disconnect RSCLK0 -> TSCLK0 and RFS0 -> TFS0. - Setup an input source (such as a radio) to the audio in jack and an output source (such as headphones) to the audio out jack of the EZ-KIT Lite. See the ADSP-BF533 EZ-KIT Lite User's Manual for more information on setting up the hardware. - Select "Run" from the "Debug" tab on the menu bar of VisualDSP. - Listen to the operation of the talk-through