导航计算机系统中CPLD配置软件串口更新研究

摘要

In order to update the CPLD allocation software in embedded navigation computer system, a update scheme of CPLD allocation software update based on DSP applying serial port isproposed. The file that contains the information of CPLD configuration is sent to navigation computer system by UART port from PC. The JTAG time sequence logic of CPLD is simulated through I/O port of DSP. The CPLD configuration information file received by the serial port is immigrated into its internal logic to achieve CPLD software update. For the achievement of the above method, some key problems existing ing hardware and software are analyzed and solved. The method for updating CPLD software was implemented and applied in actual navigation computer system.%针对嵌入式导航计算机系统中CPLD器件软件更新需求,提出了通过串行方式基于DSP的CPLD软件更新方案,通过DSP的I/O口模拟CPLD的JTAG时序逻辑,将由串口接收到的CPLD配置信息文件,移入到其内部逻辑中,从而实现软件更新.分析研究了实现该方案需解决的硬件和软件中的关键问题,设计实现了提出的CPLD器件软件更新方案,并在实际的导航计算机系统中进行了验证和应用.