DSP的HPI与PC机并口通信接口设计

Design of communication interface between DSP and PC

在数字硬件系统的设计中,广泛采用了DSP+主机+可编程器件的方式,DSP虽然具有强大的数字信号处理能力,但其控制能力不足,通过HPI口和主机相连组成系统,是克服这个缺点通常的解决办法,因此,主机和DSP之间如何接口通信就显得非常重要。HPI口的应用极大地方便了主机与DSP系统的数据交换。本方案灵活、简单,适用于任何含有HPI接口的DSP应用系统,为开发人员提供了一种全新的数据共享、传输方案,是HPI与PC机并口的一种稳定,有效的连接方式。

Generaly, DSP and PC with PLC compose a modem digital hardware system. Although DSP is a powerful digital signal processor, it has disadvantage of short in control capacity. This disadvantage can be solved by the system composed with HPI and PC. So, the key is to realize the data communication between PC and HPI. Using HPI interface made the data exchamge easy between PC and DSP. This paper proposed a flexible, simple way that suits any applicable system including HPI and DSP. It provided a new datum share and deliver method for researchers. Experimental results show that the communication between HPI and PC paraUel interface is valid and stable.