Texas Instruments TMS320DM357 DVEVM v2.05 manual Application, Software Components

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Software Overview

4.1.2Software Components

The following figure shows the software components used for application development in the DVEVM kit:

I/O

I/O

I/O

Application

VISA API

xDM Video API Codec

xDM Imaging API Codec

Framework Components

DMAN3

Codec Engine

	VID	IMG	Engine		Speech		Audio
	SPH	AUD		xDM		xDM

				API	Codec	API	Codec

User Space

Linux APIs

Kernel Space

CMEM Driver

GPIO Driver

GP

TimerI/O

USB 2.0 Driver

MMC/SD

Driver

Wtchdg TimerI/O

EMAC

Driver

SPI

Driver

I2C

DriverI/O

Video Driver

UART Driver

Audio Driver

ARM System + MPEG4/H.264/JPEG Co-Processor (HMJCP)

In the previous figure, everything runs on the ARM. The application handles I/O and application processing. To process video, image, speech, and audio signals, it uses the VISA APIs provided by the Codec Engine. The Codec Engine, in turn, uses xDM-based codecs. For more information, see the Codec Engine Application Developer's Guide (SPRUE67).

In addition, Linux running on the ARM makes a large number of APIs available to your application, including drivers and timers.

4-4

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Contents TMS320DM357 Dvevm Getting Started Guide Important Notice Evaluation BOARD/KIT Important Notice FCC Warning Preface About This GuideTrademarks Contents Contents Dvevm Overview What’s in this Kit? What’s on the Board? DM357What’s Next? EVM Hardware Setup Setting Up the Hardware Audio In P3 Audio Out P5 Composite Video Out J8 Uart P6 Connecting to a Console Window Running the Demonstration Software Default Boot Configuration Starting the Standalone DemosStarting the Standalone Demos Starting the Standalone Demos Running the Standalone Demos Shutting Down the Demos About the Encode + Decode Demo About the Encode DemoIR Remote Buttons for Encode Demo About the Decode Demo IR Remote Buttons for Decode DemoRunning the Demos from the Command Line Running the Network Demo Page Dvevm Software Setup Software Overview Command Prompts in This Guide Application Software ComponentsPreparing to Install Installing the Software Installing the Target Linux SoftwareInstalling the Dvsdk Software Installing the A/V Demo Files Exporting a Shared File System for Target AccessSwitch user to root on the host Linux workstation Testing the Shared File System EVM # setenv nfshost ip address of nfs hostInstalling the Software Setting Up the Build/Development Environment Writing a Simple Program and Running it on the EVMCompile the kernel using the following command Building a New Linux KernelRebuilding the Dvevm Software for the Target Building with DSPLink Booting the New Linux Kernel EVM # setenv serverip tftp server ip addressUsing the Digital Video Test Bench Dvtb Page Additional Procedures Changing the Video Input/Output Methods NtscPutting Demo Applications in the Third-Party Menu File filename.tar.gz Setting Up a Tftp Server You should see the following outputAlternate Boot Methods Booting from Flash Using Board’s Nand Flash File SystemBooting via Tftp Using Board’s Nand Flash File System Booting from Flash Using NFS File SystemBooting via Tftp Using NFS File System Updating/Restoring the Bootloaders Updating U-Boot Using U-BootTo assign a dynamic address, use the following Updating/Restoring the Bootloaders Restoring the Nand Flash Updating the KernelRestoring the Nand Flash Using NFS Restoring the Nand Flash Using RAM Disk and a 2 GB SD Card EVM # tar xf /mnt/mmc/dm357flashimage####.tar EVM # cd Page Index NFSIndex--2 Index--3 Spectrum Digital, Inc 511458-0001B