基于UTMI模型的USB 2.0 IP核开发测试验证设计研究

USB2.0因具有高速、易用、热插拔、低成本等特点而成为计算机接口技术的主流,具有广阔的应用前景。USB2.0系统一般分成主机/HUB控制芯片和设备接口控制芯片(即外设)两方面。传统意义的USB开发,仅是对USB外设的开发。USB外设包括FIFO及FIFO控制器、IDE硬盘、直接存储器存取控制器(DMAC)、串行接口引擎(SIE)、UTMI收发器、内存、微处理器单元(MPU)等部分,在USB2.0IP核开发时需要对设计的这些外设代码进行测试验证,测试时可以用自己设计的UTMI电路代码,但因其本身正确性还未加验证,因此测试较麻烦复杂,本文通过实践给出了在开发USB2.0系统时利用utmi_fzFlex-Model模型和自编task完成对USB功能块在事务层上各项作业通讯测试的方法和过程,仿真实践证明此方法是有效的,因此可为USB2.0IP核的设计开发提供参考帮助。

Study of the Test Validation Design of about UTMI Model in Developing USB 2.0 IP Core System

Universal Serial Bus 2.0 have become the mainstream interface technology because it have the virtue of high speed, using easily, hot Plug and Play, low- cost, and etc. Universal Serial Bus 2.0 system consists of USB host control chip and equipment inter- face control chip, i.e. peripheral devices chip. Developing USB commonly is only to develop USB peripheral devices chip. USB pe- ripheral device chips are involved with FIFO and FIFO controller, Direct Memory Access Controller( DMAC) , Serial Interface Engine ( SIE) , USB2.0 Transceiver Macrocell Interface (UTMI), and etc. These designed peripheral devices chip codes need be validated on developing USB2.0 IP core, which can be completed by self- designed UTMI codes. But this validating process will become very complex because self- designed UTMI codes are not always correct. In this paper, a set of detailed methods, which make use of ut- mi_fz Flexmodel in the SmartModel tools, and additional tasks to design a test validation system about USB2.0 Transceiver Macrocell Interface are presented. Simulation results show these methods are valid, so can offer a kind of reference method for developing USB2.0 system.