一种基于SPI的数据交换方法研究

SPI-based Data Exchange Method Research

SPI是一种同步串行通信总线,常用于板内芯片间的数据交换。本文基于PowerPC和DSP芯片设计了一种芯片间的数据交换方法,将DSP接收的429总线数据,通过SPI总线传输到PowerPC上,同时将PowerPC要发送的429数据,通过SPI总线传输到DSP上,进一步实现系统对外的429通信功能。

SPI is a synchronous serial communication bus that is often used in data exchange between board.This paper designs a data exchange method between chips based on PowerPC and DSP chips.It transmits the 429 bus data accepted by the DSP to the PowerPC via the SPI bus,at the same time,the 429 data to be sent by the powerpc is transmitted to the dsp through the spi bus to further realize the external 429 communication function of the system.