GPS基带SoC中软硬协同设计  

Software and hardware cooperative design in GPS baseband SoC

作　　者：赵继彬 黄海生 李鑫 朱振兴 ZHAO Jibin;HUANG Haisheng;LI Xin;ZHU Zhenxing(School of Electronic Engineering,Xi’an University of Post and Telecommunication,Xi’an 710121,China)

机构地区：[1]西安邮电大学电子工程学院,西安710121

出　　处：《导航定位学报》2023年第1期163-169,共7页Journal of Navigation and Positioning

基　　金：陕西省重点研发计划项目(2022GY-011)。

摘　　要：针对ARM公司的ARM926EJ-S型号硬核形式固化处理器构建的全球定位系统(GPS)L1波段(中心频率为1575.42MHz)信号基带处理的片上系统(SoC)功耗高、成本高的问题,提出一种基于Cortex-M3开源软核处理器构建的GPS基带SoC系统,以实现处理器核的系统移植:针对软件实现和硬件实现的特点,完成基带处理的软硬件功能划分与协同设计;硬件部分选用Cortex-M3软核和高级微处理器总线架构2.0(AMBA2.0)片上总线为核心进行基带处理SoC架构设计,通过修改ARM公司提供的总线功能模块的软知识产权核(IP core),构建高级高性能总线(AHB)和外围总线(APB)的总体结构,设计若干符合AMBA2.0协议的IP核,并完成基带等相关IP核的挂接,实现SoC系统功能的扩充;软件部分通过C语言完成对系统的初始化、启动等相关配置,并编写卫星导航基带电路的特定测试信号,实现软件对基带IP的灵活配置。仿真结果表明,该系统能够实现对基带IP的灵活配置,满足对器件的低功耗、微集成要求。Aiming at the problems of high power consumption and high cost of the system on chip(SoC)of the global positioning system(GPS)L1 band(center frequency:1575.42MHz)signal baseband processing constructed by the ARM926EJS hard core solid core processor,a GPS baseband SoC system based on the Cortex-M3 open-source soft core processor planned by ARM DesignStart was proposed to realize the system transplantation of the core:according to the characteristics of software and hardware implementation,the software and hardware function division and collaborative design of baseband processing were completed;in the hardware part,the Cortex-M3 soft core and the advanced microprocessor bus architecture 2.0(AMBA2.0)onchip bus as the core were selected to carry out the baseband processing SoC architecture design;by modifying the soft intellectual property(IP)core of the bus function module provided by ARM company,the overall structure of advanced high performance bus(AHB)and advanced peripheral bus(APB)bus was constructed,several IP cores conforming to AMBA2.0 protocol were designed,and the connection of baseband and other related IP cores was completed;then the function of SoC system was expanded;meanwhile,in the software part,the initialization and startup of the system were completed by C language,and the specific test signal of the satellite navigation baseband was written to realize the flexible configuration of the baseband IP by the software.Simulational result showed that the system could realize the flexible data configuration of baseband system,and meet the requirements of low power consumption and micro integration of devices.

关 键 词：CORTEX-M3处理器 微处理器总线架构 片上系统 知识产权核 软硬件协调设计 

分 类 号：P228[天文地球—大地测量学与测量工程]