用主机接口以异步方式实现DSP与PC机间通信

Communication between DSP and PC with HPI in Asynchronous Mode

ADSP2106X的主机接口(HPI)可采用异步或同步两种方式与主机通信,从而可构成主从式系统。ADSP2106X主机接口采用异步方式与AT总线连接,以实现与PC机间通信,同时对用到的信号以及控制时序作了详细说明。设计了ADSP2106X主机接口在异步方式下与AT总线连接的具体电路,对该电路的工作原理进行了深入分析。详细讨论了使用该电路实现PC机与DSP间通信的方法,对于使用DSP主机接口构成主从式系统的设计具有很好的参考价值。

The host processor interface （HPI） of ADSP2106X can communicate with the host processor by adopting asynchronous or synchronous mode, so a master-slave system can be constituted. The signals and the control tinting sequence are needed when connecting the HPI in the asynchronous mode with the AT bus to realize cmnmunication between PCs are explained in detail. The concrete circuit of the interface connected with the AT bus in asynchronous mode is designed and its working principle is analyzed in depth. The methods to realize cmnmunication between DSP and PCs by using this interface circuit are discussed in detail. These methods are good reference for using DSP＇s HPI to constitute a master-slave system.