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Description: omap5912 spi interface driver. In addition, supply a fpga download example via spi
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Size: 11264 |
Author: 吴瑞玉 |
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Description: 微程序控制电路是CPU 控制器的核心电路，控制产生指令执行时各部件协调工作所需的所有控制信号，以及下一条指令的地址。微程序控制器的组成如图6-12 所示，主要由三个部分组成，分别是微指令控制电路、微地址寄存器和微指令存储器lpm_rom 其中微指令控制电路用组合电路对指令中的1[7..2] 、操作台控制信号SWA 和SWB 的状态、状态寄存器的输出状态FC 、FZ ，产生微地址变化的控制信号，实现对微地址控制:微地址寄存器控制电路的基本输入信号是微指令存储器的下地址字段M[6..1] ，同时还受微指令控制电路的输出信号SE[6..1]和复位信号RST 的控制，输出下一个微指令的地址:控制存储器由FPGA 中的LPM ROM 构成，输出24 位控制信号。在24 位控制信号中，微命令信号为18 位，微地址信号豆位。在口时刻将打入微地址寄存器UA 的内容，即为下一条微指令地址.当T4时刻进行测试判别时，转移逻辑满足条件后输出的负脉冲，通过强制端将某一触发器置为"1"状态，完成地址修改。微程序控制器中的微控制代码可以通过对FPGA 中LPMß OM 的配置进行输入，通过编辑LPM ROM.mif 文件来修改微控制代码。详细情况可参考LPIÞ CROM的配置方法。微指令控制电路内部结构如图6-2 ， 6-3. 6-13 所示-Micro-program control circuit is the core CPU controller circuit, the control instruction execution produces the coordination of all parts of all the necessary control signals, and the next instruction address. The composition of micro-program controller shown in Figure 6-12, the main three components, namely, microinstruction control circuit, micro-address register and the microcode memory lpm_rom microcode control circuit which combination circuit with instruction in the 1 [ 7 .. 2], SWA and SWB console control signal state, the state register output state FC, FZ, produce changes in micro-address control signals, to realize the micro-address control: micro-address register control circuit input signal is the basic micro- The next address field instruction memory M [6 .. 1], but also by the microcode control circuit output signal SE [6 .. 1] and reset control signal RST, the output of the next microinstruction address: control memory by the FPGA in the LPM ROM form, the output 24-bit
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Size: 2584576 |
Author: 623902748 |
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Description: 本文首先研究了IsO／IECl8000．6标准中A、B两类短程通讯的前向链路与返回
链路的数据编码方式，对(FMO)双相间隔编码、(PIE)脉冲间隔编码、曼切斯特码
的编解码方式和技术参数进行了深入的分析，并利用FPGA实验平台对这三种编
码的编、解码电路进行了设计和仿真。然后对UHF RFID系统的差错控制技术原理
进行了探讨，重点研究了ISo／IECl8000．6标准中采用的数据保护与校验技术，即
循环冗余校验(CRC)技术。分析了基于线性反馈移位寄存器(LFSR)实现CRC的电
路，从理论和实现两个方面对其中存在的问题提出了解决办法，设计了一种改进
型线性反馈移位寄存器电路来实现循环冗余校验。对于要求CRC运算速度高的系
统，本文利用了递归的算法设计了一种新型的并行CRC电路。最后本文提出了一
种新颖的UHF RFID系统数字基带电路，区别于一般数字基带电路的地方是：在编
解码模块和CRC模块之间加入了卷积编码和维特比译码模块。利用卷积码优良的
纠错能力，来解决UHF RFID系统在电磁干扰严重的环境中识别率低、通信速度慢
的问题，效果良好。-The first，this paper investigates the f．0rward link and retum link data encodlng
method in short range communication types A and B in ISO／IEC 1 8000-6，and deeply
analyzes encoding method and technical parameters of Bi—Phase Space(FMO)coding，
Pulse IntervaI Encoding(PIE)coding and Manchester coding．We also designed and
simulated code circuits and decode circuits of the three encoding method by FPGA
experiment platfoml． The second， We discussed the technical principle of error
control of the UHF RFID system，especially for the techn0109y of data Verification
肌d calibration，namely cyclic redundancy check that used in IS0／IEC 1 8000·6·The
circuits of CRC based on Linear Feedback Shin Register(LSFR)are analyzed行om
theonr and realization，and some means of solVing problems are put fon)Irard，then an
improved LSFR circuit to implement CRC is designed．For some require fast CRC
calculation system，we designed a noVel parallel CRC circuit by using recurslVe
fomlula．In the end，we put forw
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Size: 4366336 |
Author: HY jian |
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Description: 常用的几种伪随机序列的仿真及性能分析，进而运用组合序列的思想，尝试不同的序列以不同组合方式生成的新的伪随机序列，并用FPGA分析其性能，得出组合序列的一般的规律，借此推导出了一种新的组合序列——异族Gold组合序列。-Through simulation and performance analysis of several commonly use¬ d pseudo-random sequence in the FPGA environment, use the ideas of combina¬ tion sequence and try different sequences generated by different combinations ofpseudo-¬ ran¬ d¬ om sequence, and then analyze its performance by using MATLAB. So we get the general laws of combination of sequences to deduce a new combination sequen¬ ce name¬ d interracial Gold combination sequence.
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Size: 4096 |
Author: 杨远望 |
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