数字信号处理器的SPI串行接口设计

Designing Method of Serial Interface of Digital Signal Processor in SPI Mode

针对ＴＩ公司的数字信号处理器ＴＭＳ３２０Ｃ５４０２与１２位串行模／数转换器ＴＬＶ２５４３ 接口的时序配合问题，依据ＳＰＩ串口的设计原理，提出了一种ＤＳＰ的多通道缓冲串行接口与其 它具有ＳＰＩ串行接口的器件通讯接口电路与软件设计方法．运行结果表明，用ＤＳＰ的缓冲串口 与外部器件通过ＳＰＩ串口通讯，接口简单，控制方便．

In this report, a designing method of interface circuit and software is provided, which can implement an interface between TMS320C5402 digital signal processor and TLC2543 12-bit, analog-to-digital converter (ADC). The design is based on the principle of SPI serial port interface. This interface can be adapted for use in interfacing DSP multi-channel buffered serial port to any other devices across the SPI. The results obtained in this report can be. interpreted that interfacing a TMS320C54x DSP to other devices across a standard serial peripheral interface (SPI) can bring about circuit simplification and convenience for control.