SDSoC平台开发指南

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"SDSoC平台开发" SDSoC（System Design Suite for Embedded C and C++）环境是一个集成的开发工具链，专为基于Xilinx FPGA的嵌入式系统设计而设计。该平台开发指南（UG1146 v2018.2）主要涵盖了如何创建和使用SDSoC平台，以及与FPGA相关的硬件和软件平台开发流程。在2018.2版本的更新中，SDSoC环境的使用部分提到了链接已被更新至最新的发行说明，确保开发者可以获取到最新的工具功能和改进。此外，第5章关于样例应用的部分，原先的`template.xml`文件被`description.json`所替代，这可能是为了提供更灵活且结构化的平台描述方式，使得开发者能更好地定义和管理他们的平台配置。在2018.1版本中，预构建硬件部分的文本进行了更新，强调了如何将应用项目中的文件填充到平台项目中的预建数据，这可能涉及到将特定的应用需求整合到自定义平台的过程，以优化设计的性能和效率。 SDSoC平台开发指南的核心内容包括： 1. **创建SDSoC平台**：这部分指导用户如何使用SDx工作空间来启动一个新的SDSoC平台项目。从创建项目开始，开发者需要定义平台的软件部分，包括操作系统、库和其他必要的组件。 2. **定义软件平台**：这部分详细阐述了如何定义平台的软件栈，这通常涉及到选择合适的RTOS（实时操作系统），确定需要的库和驱动程序，以及配置其他软件服务。 3. **测试和使用平台**：在平台创建完成后，需要进行测试以验证其功能和性能。这部分内容可能涵盖了如何在模拟器或实际硬件上运行测试用例，以及如何调试和优化平台。 4. **SDSoC硬件平台创建**：硬件平台的创建是整个流程的关键环节。首先，它列出了硬件平台的必要条件，包括FPGA的特性、内存接口、外设连接等。然后，通过Vivado工具创建平台项目，并使用IP Integrator进行逻辑设计。在此过程中，开发者需要定义定制的IP核，配置片上存储器，以及设置外设接口。 5. **逻辑设计使用IP Integrator**：IP Integrator是Vivado中的一个模块化设计工具，允许开发者通过图形化界面组合和配置不同的IP核，以实现硬件加速器或者完整的嵌入式系统。 6. **定义平台**：最后，定义平台的步骤可能包括配置硬件描述语言（如VHDL或Verilog）的实现，设置系统级参数，以及生成硬件描述文件，这些文件是SDSoC工具识别和使用平台的基础。该文档对于那些希望利用SDSoC环境进行FPGA上嵌入式系统开发的工程师来说，是一个宝贵的资源，它详细介绍了从项目初始化到平台测试和优化的全过程。通过遵循这个指南，开发者可以有效地构建定制的SDSoC平台，满足特定的应用需求和性能目标。

TIP: The Samples folder can be specied through the Browse command, or you can add samples in the

resources folder of the plaorm project and use the Search command ( ) to load it. The resources

folder, as shown in the Explorer view is local to the project in the workspace, and can simplify the

process of sharing the plaorm project with others.

Defining the System Configuration

The System Conguraon denes the soware environment that is booted and runs on the

hardware plaorm. It will specify Operang Systems and the run-me sengs for the processors

in the hardware plaorm, and will also have soware-congurable hardware parameters.

With the plaorm project opened in the SDx IDE, you can add System Conguraons to the

plaorm by clicking the Dene System Conguraon command in the workow at the boom of

the Editor. This will open the New System Conguraon dialog box as shown below.

TIP: You can also use the Add command ( ) in the Editor and select System Conguraon.

Figure 7: System Configuration

The elds of the System Conguraon dialog box include:

• Name: Species an idener for the System Conguraon. The name should be alphanumeric,

between 3 and 40 characters long, and include no special characters except underscore, '_',

and dash, '-'. Because the System Conguraon name is an idener it cannot be modied

aer it is created.

Chapter 2: Creating SDSoC Platforms

UG1146 (v2018.2) July 2, 2018 www.xilinx.com [placeholder text]

SDSoC Platform Development Guide 14

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TIP: When using the Makele ow, or command-line, you can specify this idener using -sds-sys-

cong<name> opon of

sds++

to specify the soware plaorm used, which includes the target

operang system and other sengs.

• Display Name: The name that will be displayed by the SDx IDE and in reports. This name can

include spaces and special characters, and can be modied.

• Descripon: A brief descripon for the conguraon.

• Boot Directory: A directory containing any les referenced in the BIF le such as the FSBL, U-

Boot, Arm Trusted Firmware. The Boot directory should have all the soware components

referred by the BIF le. If any of the components referred to in the BIF le are not present in

Boot directory the plaorm generaon step will return an error about the missing component.

• Bif File: The Boot Informaon File (BIF) contains informaon such as which ELF le to load on

which processor (ie. FSBL runs on core 0), how the bitstream should be loaded, and any other

sub-programs which must run to congure the processor (such as the Arm Trust Zone bl31.elf,

or u-boot.elf, etc.). Refer to Chapter 4: Soware Plaorm Data Creaon for more informaon.

IMPORTANT!: It is assumed that any les referenced in the BIF le will be in the directory specied by

the Boot Directory eld.

Click OK to close the New System Conguraon dialog box and add the conguraon to the

plaorm. You will see the conguraon listed in the Editor view.

If you select the System Conguraon in the tree view of the plaorm, on the le side of the

Editor, you will see the informaon for the System Conguraon as you have dened it. In

addion, the Readme eld is displayed to let you dene a readme le associated with the

conguraon. The readme le should be available along with the SD Card. This le informs users

of the plaorm how to boot an applicaon for this conguraon, and how the board should be

physically set, for example Jumper Sengs. It is a plain text le that contains instrucons to the

user.

Defining the Processor Domain

The Processor Domain will dene the OS operang on one or more processors on the device,

and the run-me. The domain denes dierent sengs for the OS, whether Linux, FreeRTOS, or

Standalone.

As shown in the gure below, SDSoC™ allows for applicaons targeng the standalone or

FreeRTOS operang system to be built to target a specic Processor core (Cortex™-A9, Cortex-

A53, or Cortex-R5), and for Linux applicaons to be built to run on all cores that are visible to the

OS. When dening a domain for the Linux operang system, you do not need to target a specic

core, but instead can assume that the Linux scheduler will schedule across processors as

appropriate, and isn’t restricted to any parcular processor core.

You can add domains to a System Conguraon by clicking the Add Processor Group/Domain

command in the workow at the boom of the Editor. This opens the New Domain dialog box as

shown below.

Chapter 2: Creating SDSoC Platforms

UG1146 (v2018.2) July 2, 2018 www.xilinx.com [placeholder text]

SDSoC Platform Development Guide 15

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