摘要
在USB 2.0设备接口协议的基础上,对Cypress公司的CY7C68001芯片的功能寄存器做了较为详细的介绍,设计了一种基于TI公司TMS320VC5416DSP芯片与CY7C68001的USB 2.0系统的硬件接口逻辑及软件系统。通过采用CPLD,克服了TMS320VC5416 I/O口功能弱的缺点,提高了DSP的控制能力,增强了系统的灵活性和可扩充性,用所设计的软件接口实现了控制寄存器访问、中断源的读取、命令节点处理等功能,给出了具体的硬件框图和关键代码。实验结果表明用CY7C68001实现的TMS320VC5416与PC机之间的通信是高速可靠的。
From the view point of USB 2.0 protocol,a detailed explanation for function registors of CY7C68001 is given,and a hard- ware interface logic and software system on the basis of TMS320VC5416 DSP and CY7C68001 are presented. By employing CPLD, the DSP I/O interface capability is improved, bringing more flexibility and expandability to the system. The designed interface software is capable of visiting the control state reglsters,reading interrupt sources and processing order nodes. The illustrative block diagram hard- ware and some key codes are provided. As the experiments show that the communication between TMS320VC5416 and PC is rapid and reliable.
出处
《现代电子技术》
2006年第4期118-120,123,共4页
Modern Electronics Technique
