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通过分析Windows Sound System兼容声卡和PC机ISA总线的接口原理,将其中的声效芯片CS4235应用到基于DSP的嵌入式系统中,极大地改善了系统的音质;采用DMA控制器8237A实现DSP与CS4235的硬件接口,遵循PnP协议解决DSP对CS4235的资源配置以及寄存器读写等软件接口问题;最后给出CS4235在基于DSP的全数字化语言学习系统中的具体应用。
By analyzing the interface principle of the Windows Sound System compatible sound card and the PC ISA bus, the sound chip CS4235 is applied to the DSP-based embedded system, which has greatly improved the sound quality of the system. The DMA controller 8237A is used to implement the DSP and CS4235 Hardware interface, follow the PnP protocol to solve the DSP on the CS4235 resource configuration and register reading and writing and other software interface issues; finally CS4235 in DSP-based digital language learning system specific application.