显示仪表中的GPS串行数据接收-《计算机技术与发展》

文章信息/Info

Author(s):: ZENG Zheng-lin; WANG Bin; Lanzhou Institute of space Technology and Physics

Keywords:: GPS serial data; 80C32 ; SCM; dual 64-stage static shift register

摘要:: 某仪表显示设备中需在GPS定位状态下，从GPS接收机接收并解析GPS定位信息进行显示。根据任务需求及设计约束，该显示设备选用80C32单片机作为任务主处理器。由于80C32单片机I／O、中断等资源有限，如果直接采用单片机I／O口接收GPS数据，则可能无法保证设备中其他显示、通讯等功能的实现。文中基于单片机系统提出一种用双64位移位寄存器对128位GPS串行数据进行接收的电路设计思想。该电路设计节省了系统资源，简化了软件设计，同时经过了飞行试验验证

Abstract:: A display instrument needs to receive and process GPS serial data which is sended from GPS receiver, then displays the GPS information on LCD. According to the functional needs and design constraint,this display instrument is based on processor 80C32. But in the hardware design phase, few I/O pins and interrupt resources can be used. If I/O pins are used to receive GPS data, it may not be able to ensure the functions of display and communications to achieve. So the design of the electric circuits which is used dual 64-stage static shift register to receive GPS serial data is introduced. This design saves the system resources and simplifies the software design, it is also verified by flight experiments