团队协作FPGA设计最佳实践

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"FPGA Design_ Best Practices for Team-based Design" 在FPGA设计领域，团队合作是实现高效、高质量项目的关键。本资源由Philip Simpson撰写，聚焦于在团队环境中进行FPGA开发的最佳实践，旨在帮助项目管理者和设计工程师有效地协同工作，确保项目的成功执行。 FPGA（Field-Programmable Gate Array）是一种可编程逻辑器件，它允许用户根据需求定制数字电路。CPLD（Complex Programmable Logic Device）是另一种可编程逻辑设备，通常用于比FPGA更简单的逻辑设计。设计过程中，选择合适的FPGA或CPLD型号是至关重要的，这涉及到对项目需求的深入理解，包括性能、功耗、成本以及封装尺寸等因素。团队协作在FPGA设计中涉及多个层面： 1. **项目规划**：明确项目目标、时间表和里程碑。这需要团队成员共同讨论并确定设计的范围、预期的性能指标以及项目的时间线。 2. **任务分配**：根据团队成员的专业技能，合理分配设计、仿真、验证、布局和布线等任务。每个成员应清楚自己的职责，确保工作的连贯性和一致性。 3. **版本控制**：使用版本控制系统如Git，来跟踪代码更改，避免冲突，并确保团队成员可以访问到最新且一致的设计文件。 4. **设计规范**：建立一套完整的设计和编码规范，确保团队成员遵循相同的规则，提高代码的可读性和可维护性。 5. **沟通与协作**：定期的会议和进度更新有助于保持团队同步，及时解决问题。使用协作工具如JIRA或Confluence来管理任务和文档，促进团队间的交流。 6. **测试与验证**：建立全面的测试平台和测试用例，确保设计的正确性和可靠性。团队应共同参与验证过程，以发现和修复潜在问题。 7. **资源评估与选型**：根据设计的需求，评估不同FPGA或CPLD的资源利用率，如逻辑单元、存储器块、I/O接口等，选择最合适的器件。 8. **风险管理**：识别可能的技术挑战和延误风险，制定应对策略，降低项目失败的可能性。 9. **文档编写**：清晰的文档记录设计过程、决策和结果，便于后续的维护和升级。通过应用这些最佳实践，团队可以更有效地管理复杂的设计流程，优化资源利用，同时减少错误和延误，提升整体设计效率。在FPGA设计的团队合作中，有效的管理和协调不仅关乎技术实现，更关乎项目的成功与否。

xvList of Figures

Fig. 12.9 Integration of modules in the top-level design ........................... 119

Fig. 12.10 Example design partitioned for incremental compilation .......... 119

Fig. 12.11 Example of the RTL viewer in the Quartus II software .............. 125

Fig. 12.12 Example view of a FSM from the Quartus II RTL viewer ......... 126

Fig. 12.13 Critical Path View in Quartus II

technology map viewer ............................................................... 127

Fig. 12.14 The Quartus II chip planner detailing the

Stratix IV ALM architecture ...................................................... 127

P. Simpson, FPGA Design: Best Practices for Team-based Design,

DOI 10.1007/978-1-4419-6339-0_1, © Springer Science+Business Media, LLC 2010

1.1 Introduction

This book which describes the Best Practices for successful FPGA design is the

result of meetings with hundreds of customers on the challenges facing each of their

FPGA design teams. By gaining an understanding into their design environments,

processes, what works, what does not work, I have been able to identify the areas

of concern in implementing System designs. More importantly, it has enabled me

to document a recommended methodology that provides guidance in applying a

best practices design methodology to overcome the challenges.

This material has a strong focus on design teams that are across sites. The goal being

to increase the productivity of FPGA design teams by establishing a common method-

ology across design teams; enabling the exchange of design blocks across teams.

Best Practices establishes a roadmap to predictability for implementing system

designs in a FPGA.

The three steps (Fig. 1.1) to predictable results are:

1. Proper project planning and scoping

2. Choosing the right FPGA device to ensure that the right technology is available

for today’s and tomorrow’s projects

3. Following the best practices for FPGA design development in order to shorten

the design cycle and to ensure that your designs are complete on schedule and

that the design blocks can be re-used on future projects with minimal effort

All three elements need work together smoothly to guarantee a successful FPGA

design.

The choice of vendor should be a long-term partnership between the Companies.

By sharing roadmaps and jointly managing existing projects, you can ensure that

not only is the current project a success but provide the right solutions on time for

future projects. A process of fine tuning based on experience working together to

guarantee success on projects.

These two topics are touched upon briefly in the Best Practices for Successful

FPGA Design methodology.

Chapter 1

Best Practices for Successful FPGA Design

2 1 Best Practices for Successful FPGA Design

The third topic is the FPGA design methodology.

This is the main focus of the best practices methodology. This covers the complete

FPGA design flow from the basics to advanced techniques. This methodology is

FPGA vendor independent in that the topics and recommendations are good practices

that apply to the design of any FPGAs. While most of the material is generic, it does

contain references to features in the Altera design tools that reinforce the recommended

best practices.

The diagram that is shown in Fig. 1.2 shows the outline of the best practices

design methodology.

Each of the blocks in the diagram is represented by chapters in this book, with

an additional chapter on power. Power is its own chapter as it spans many of the

other areas of the design methodology. The topics of Board Layout, RTL Design,

IP Reuse, Functional Verification and Timing Closure tend to be the areas where

design teams have different design methodologies and engineers need guidance on

achieving consistent results and shortening the design cycle.

Many of the challenges that are faced in FPGA design are not unique to FPGA

design but are common challenges in system design. FPGA devices themselves do

provide unique challenges and opportunities compared to ASIC designs. The

increase in capability of FPGA devices has resulted in much more complex designs

targeting FPGAs and a natural migration of ASIC designers to FPGA design. This

has resulted in many design teams migrating ASIC design principles to FPGA

designs. In general, this has been a benefit to the FPGA design flow; however it

needs to be balanced with the benefits that FPGAs bring to the design flow. The

programmable nature of FPGAs opens the door to performing more verification

Key Elements to Successful FPGA Design

Predictability

& Reliability

Program

Management

FPGA Design

Methodology

Vendor

Choice

Partnership

•

Device Selection

•

IP Reuse

•

Team Based Design

Environment

•

Predictable Timing

Closure

•

Optimized verification

environment

•

Time to production

•

Si foundry partner

•

Technology roadmaps

•

Component roadmaps

•

Software roadmaps

•

IP roadmaps

•

Early Access to Advanced

Tools

•

Project requirements and objectives

•

WBS & schedule

•

Resources & costs

•

Risk assessment & management

•

Change control

•

Project execution

Fig. 1.1 Three steps to successful FPGA development

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