基于PowerPC嵌入式内核的多串口通信扩展设计  

Design of the expansion of multi-serial ports communication based on PowerPC embedded core

作　　者：居晓[1] 李志宇[2] 肖莉萍[2] 

机构地区：[1]南京航空航天大学自动化学院,江苏南京210016 [2]南京航空航天大学无人机研究院,江苏南京210016

出　　处：《电子设计工程》2014年第7期177-180,共4页Electronic Design Engineering

摘　　要：本文设计了一种基于PowerPC嵌入式内核MPC565和串口模块EMM-8M-XT的多串口通信系统,给出了系统总体的硬件架构和软件设计流程,详述了串口卡跳线及寄存器的设置方法,实现了8个RS232/422/485工作模式可任意配置的全双工通信串口。MPC565通过PC/104总线对串口卡进行读写控制,体积小,使用方便。经大量长时间的通信测试和考机验证,串口系统工作稳定,实时性好,抗干扰性强,在不同应用环境中采用特定通信模式能有效保证信息交换的可靠性,适用于具有多路串行数据传输需求的复杂控制场合。This article has completed the design and realization of the audio decoding system＇s hardware plane mainly referring to the all-purpose DSP chip of TI Company＇s C5000 series-TMS320VC5509,researching on MP3＇s encoding- decoding algorithm and the DSP realization on its hardware plane. The whole system＇s plane includes minimum system of DSP, FLASH storage, audio CODEC and power, etc. The system downloads the data stream of MP3 format through the communication between USB interface and PC, stores them in FLASH and then reads the MP3 data stream in Flash by DSP, finishes decoding and plays with CODEC.Moreover, the system can also be programmed for other encoding-decoding algorithms for DSP, realizes the audio encoding-decoding for various format of data stream and has a very good flexibility for updating soft, and at the same time solves the problem of lower power consumption.

关 键 词：嵌入式系统 多串口通信 PC 104总线 

分 类 号：TN923[电子电信—通信与信息系统]