近年来,SoPC(System On a Programmable Chip,可编程片上系统)的应用日益增多。针对此趋势,系统介绍了Xilinx公司的MicroBlaze软核处理器和PetaLinux操作系统的特点,利用EDK开发套件搭建一个基于MicroBlaze的硬件平台,并研究了PetaLinu...近年来,SoPC(System On a Programmable Chip,可编程片上系统)的应用日益增多。针对此趋势,系统介绍了Xilinx公司的MicroBlaze软核处理器和PetaLinux操作系统的特点,利用EDK开发套件搭建一个基于MicroBlaze的硬件平台,并研究了PetaLinux的移植、自定义设备驱动的添加、配置和启动。实验证明,使用PetaLinux开发的SoPC能够满足用户复杂多变的需要,且构建简单、快速,缩短了产品的开发周期。展开更多
The high-speed computational performance is gained at the cost of huge hardware resource,which restricts the application of high-accuracy algorithms because of the limited hardware cost in practical use.To solve the p...The high-speed computational performance is gained at the cost of huge hardware resource,which restricts the application of high-accuracy algorithms because of the limited hardware cost in practical use.To solve the problem,a novel method for designing the field programmable gate array(FPGA)-based non-uniform rational B-spline(NURBS) interpolator and motion controller,which adopts the embedded multiprocessor technique,is proposed in this study.The hardware and software design for the multiprocessor,one of which is for NURBS interpolation and the other for position servo control,is presented.Performance analysis and experiments on an X-Y table are carried out,hardware cost as well as consuming time for interpolation and motion control is compared with the existing methods.The experimental and comparing results indicate that,compared with the existing methods,the proposed method can reduce the hardware cost by 97.5% using higher-accuracy interpolation algorithm within the period of 0.5 ms.A method which ensures the real-time performance and interpolation accuracy,and reduces the hardware cost significantly is proposed,and it’s practical in the use of industrial application.展开更多
研究了基于嵌入式Nios Ⅱ软核的MPEG-4视频解码系统的设计优化,以期提高便携式多媒体播放器视频解码的综合性能。提出了在可编程片上系统(System on a programmable chip,SOPC)中软硬件协同设计方案,通过研究二维离散余弦逆变换、运动...研究了基于嵌入式Nios Ⅱ软核的MPEG-4视频解码系统的设计优化,以期提高便携式多媒体播放器视频解码的综合性能。提出了在可编程片上系统(System on a programmable chip,SOPC)中软硬件协同设计方案,通过研究二维离散余弦逆变换、运动补偿、颜色空间转换的硬件IP核优化设计与实现,构建基于Nios II软核软硬件协同设计的视频解码系统。以Altera型号EP2C35F672C8的FPGA为核心的SOPC系统测试结果表明,该系统在运行频率仅为100MHz下,测试码流的码率为1 593.90kb/s时,帧率可以达到35.20f/s,实现了MPEG-4的实时解码,从而使该SOPC软硬件协同设计实现了播放器的低功耗等高性能。展开更多
文摘近年来,SoPC(System On a Programmable Chip,可编程片上系统)的应用日益增多。针对此趋势,系统介绍了Xilinx公司的MicroBlaze软核处理器和PetaLinux操作系统的特点,利用EDK开发套件搭建一个基于MicroBlaze的硬件平台,并研究了PetaLinux的移植、自定义设备驱动的添加、配置和启动。实验证明,使用PetaLinux开发的SoPC能够满足用户复杂多变的需要,且构建简单、快速,缩短了产品的开发周期。
基金supported by National Key Basic Research Program of China(973 ProgramGrant No.2011CB706804)+1 种基金Shanghai Municipal Science and Technology Commission of China(Grant No.11QH1401400)Research Project of State Key Laboratory of Mechanical System & Vibration of China(Grant No.MSVMS201102)
文摘The high-speed computational performance is gained at the cost of huge hardware resource,which restricts the application of high-accuracy algorithms because of the limited hardware cost in practical use.To solve the problem,a novel method for designing the field programmable gate array(FPGA)-based non-uniform rational B-spline(NURBS) interpolator and motion controller,which adopts the embedded multiprocessor technique,is proposed in this study.The hardware and software design for the multiprocessor,one of which is for NURBS interpolation and the other for position servo control,is presented.Performance analysis and experiments on an X-Y table are carried out,hardware cost as well as consuming time for interpolation and motion control is compared with the existing methods.The experimental and comparing results indicate that,compared with the existing methods,the proposed method can reduce the hardware cost by 97.5% using higher-accuracy interpolation algorithm within the period of 0.5 ms.A method which ensures the real-time performance and interpolation accuracy,and reduces the hardware cost significantly is proposed,and it’s practical in the use of industrial application.
文摘研究了基于嵌入式Nios Ⅱ软核的MPEG-4视频解码系统的设计优化,以期提高便携式多媒体播放器视频解码的综合性能。提出了在可编程片上系统(System on a programmable chip,SOPC)中软硬件协同设计方案,通过研究二维离散余弦逆变换、运动补偿、颜色空间转换的硬件IP核优化设计与实现,构建基于Nios II软核软硬件协同设计的视频解码系统。以Altera型号EP2C35F672C8的FPGA为核心的SOPC系统测试结果表明,该系统在运行频率仅为100MHz下,测试码流的码率为1 593.90kb/s时,帧率可以达到35.20f/s,实现了MPEG-4的实时解码,从而使该SOPC软硬件协同设计实现了播放器的低功耗等高性能。
