因此，您想编写一个内核模块。您知道C，您已经编写了一些可以作为进程运行的常规程序，现在您想知道真正的动作在哪里，一个通配指针可以擦掉文件系统，核心转储意味着重新启动。内核模块到底是什么？模块是可以根据需要加载和卸载的代码段。它们扩展了内核的功能，而无需重新引导系统。例如。模块驱动程序的一种类型是设备驱动程序，它允许内核访问没有模块的系统硬件，我们将不得不构建单片内核并将新功能直接添加到内核映像中，除了具有更大的内核之外，这还具有缺点每次我们想要新功能时都要求我们重建并重新启动内核的过程So, you want to write a kernel module. You know C, you, ve written a few normal programs to run as processes, and now you want to get to where the real action is, to where a single wild pointer can wipe out your file system and a core dump means a reboot.What exactly is a kernel module? Modules are pieces of code that can be loaded and unloaded into th upon demand. They extend the functionality of the kernel without the need to reboot the system. For example.one type of module is the device driver, which allows the kernel to access hardware connected to the syste without modules, we would have to build monolithic kernels and add new functionality directly into the em ernel image, Besides having larger kernels
标签： linux
上传时间： 2022-03-30
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在全球气候变暖和石油资源短缺的形势下,推动新能源汽车的发展将成为汽车行业一种新的发展方向。在大力发展新能源电动汽车行业的同时还应兼顾电动汽车充电设施的发展,因此对电动汽车充电桩的设计与研究显得十分必要。对电动汽车直流充电桩的硬件系统进行设计,主要的硬件电路包括安全监测电路、总压采集电路、温湿度检测电路、语音电路。软件包括主要流程图和温湿度检测流程图。Under the situation of global warming and shortage of petroleum resources,promoting the development of new energy vehicles will become a new development direction for the automotive industry.While vigorously developing the new energy electric vehicle industry,we should also take into account the development of electric vehicle charging facilities.Therefore,the design and research of electric vehicle charging piles is very necessary.The hardware system of the electric vehicle DC charging pile is designed.The main hardware circuits include safety monitoring circuit,total voltage collecting circuit,temperature and humidity detecting circuit,voice circuit and CAN communication.The software includes a main flow chart and a temperature and humidity detection flow chart.
标签： 电动汽车
上传时间： 2022-04-03
上传用户：jason_vip1
意法半导体STM8系列参考手册Program memory: 8 Kbyte Flash memory; dataretention 20 years at 55 °C after 100 cycles• RAM: 1 Kbyte• Data memory: 128 bytes true data EEPROM;endurance up to 100 k write/erase cycles
标签： stm8
上传时间： 2022-04-27
上传用户：zhaiyawei
BLE heart rate profile document.this is can help you how to write a profile.
标签： ble
上传时间： 2022-04-30
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基于TMS320F28335的超声波流量计硬件原理图+软件源码本文以TMS320F28335 处理器为核心，设计一种用于管道流量测量的超声波流量计。系统硬件由核心板，超声波发射和接收电路，切换电路，超声换能器，基于ADS805 的高速信号采集电路，人机交互以及电源等模块构成。采用时差法进行管道流量测量，时差测量采用SCOT 加权的广义互相关时延估计算法。本论文设计的超声波流量计具有测量速度快、准确性好、成本低等优点。关键字：C2000，超声波，流量，广义互相关算法AbstractA kind of ultrasonic flowmeter using for the pipe flow measurement is designed based onTMS320F28335 in this paper. The system hardware consists of the following parts: the core board,ultrasonic signal transmitter and receiver circuits, switch circuit, ultrasonic transducer, signalacquisition circuit based on ADS805, human-computer interaction module and power supplymodule, etc. The system use the method of time difference for pipeline flow measurement and thetime difference is calculated by the time-delay algorithm of SCOT weighted generalizedcross-correlation. The ultrasonic flowmeter has the features of high testing speed, high precisionand low cost, etc.Keywords: C2000,Ultrasonic, Flow, Generalized Cross-Correlation Algorithm
标签： tms320f28335 超声波流量计
上传时间： 2022-05-06
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Vivado设计分为Project Mode和Non-project Mode两种模式，一般简单设计中，我们常用的是Project Mode。在本手册中，我们将以一个简单的实验案例，一步一步的完成Vivado的整个设计流程一、新建工程1、打开Vivado 2013.4开发工具，可通过桌面快捷方式或开始菜单中xilinx DesignTools-Vivado 2013.4下的Vivado 2013.4打开软件，开启后，软件如下所示：2、单击上述界面中Create New Project图标，弹出新建工程向导，点击Next.3、输入工程名称、选择工程存储路径，并勾选Create project subdirectory选项，为工程在指定存储路径下建立独立的文件夹。设置完成后，点击Next注意：工程名称和存储路径中不能出现中文和空格，建议工程名称以字母、数字、下划线来组成。4、选择RTL Project一项，并勾选Do not specifty sources at this time，勾选该选项是为了跳过在新建工程的过程中添加设计源文件。点击Next.IA5、根据使用的FPGA开发平台，选择对应的FPGA目标器件。（在本手册中，以xilinx官方开发板KC705为例，Nexys4开发板请选择Artix-7 XC7A100TCSG324-2的器件，即Family和Subfamily均为Artix-7，封装形式（Package）为cSG324，速度等级（Speed grade）为-1，温度等级（Temp Grade）为C）。点击Next6、确认相关信息与设计所用的的FPGA器件信息是否一致，一致请点击Finish，不一致，请返回上一步修改。二、设计文件输入1、如下图所示，点击Flow Navigator下的Project Manager->Add Sources或中间Sources中的对话框打开设计文件导入添加对话框。2、选择第二项Add or Create Design Sources，用来添加或新建Verilog或VHDL源文件，点击Next
标签： vivado
上传时间： 2022-05-28
上传用户：默默
le flows through MOS channel while Ih flows across PNP transistor Ih= a/(1-a) le, IE-le+lh=1/(1-a)' le Since IGBT has a long base PNP, a is mainly determined by ar si0 2ar= 1/cosh(1/La), La: ambipolar diff length a-0.5 (typical value)p MOSFET channel current (saturation), le=U"Cox"W(2"Lch)"(Vc-Vth)le Thus, saturated collector current Ic, sat=1/(1-a)"le=-1/(1-a)"UCox"W/(2Lch)"(Vo-Vth)2Also, transconductance gm, gm= 1/(1-a)"u' Cox W/Lch*(Vo-Vth)Turn-On1. Inversion layer is formed when Vge>Vth2. Apply positive collector bias, +Vce3. Electrons flow from N+ emitter to N-drift layer providing the base current for the PNP transistor4. Since J1 is forward blased, hole carriers are injected from the collector (acts as an emitter).5. Injected hole carriers exceed the doping level of N-drift region (conductivity modulation). Turn-Off1. Remove gate bias (discharge gate)2. Cut off electron current (base current, le, of pnp transistor)
标签： igbt
上传时间： 2022-06-20
上传用户：wangshoupeng199
This example shows how you can use signal functions in the Visiondebugger to simulate a signal that is coming into one of the analog inputs of the LPC21xx.The Measure example is described in detail in the Getting StartedUser's Guide.The MEASURE example program is available for several targets:Simulator: uVision Simulator for LPC2129MCB2100: Keil MCB2100 evaluation board with ULINK debugger - Application is loaded to internal Flash. - Switch S2 (INT1) is used as GPIO and sampled (jumper positions: J1= off, J7= on) - potentiometer POT1 is sampled as AIN0 (jumper position: J2= on) - serial port COM1 parameters: 9600 baud, no parity, 8-bits, 1 stop bit, flow control noneMCB2130: Keil MCB2130 evaluation board with ULINK debugger - Application is loaded to internal Flash. - Switch S2 (INT1) is used as GPIO and sampled (jumper positions: J1= off, J7= on) - potentiometer POT1 is sampled as AIN1 (jumper position: J2= on) - serial port COM1 parameters: 9600 baud, no parity, 8-bits, 1 stop bit, flow control none
标签： dac8568
上传时间： 2022-06-28
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PSS/E功能特点·输入数据方式及与其他程序数据文件共享的方便性·程序模型库包括发电机模型、励磁系统模型、调速器模型、HVDC模型、FACTS模型、负荷模型等的完整性·分析计算功能的多样性·用户自定义计算顺序与用户自定义计算功能·用户自定义模型功能和程序接口功能·计算方法的透明性与文档的完整性·国际交流的方便性基本功能介绍>潮流计算（Load Flow）>动态仿真（Dynamic Simulation）>批处理功能>计算和仿真结果输出>潮流计算模块（psslf4）>动态仿真模块（pssds4）>仿真结果输出模块（pssplt）DOS模式启动>数据文件建立>潮流计算启动和数据导入>数据查询和修改》数据检查>潮流计算>结果输出和数据保存◆PSS/E的可视化和图形化◆潮流结果文件的处理（动态仿真准备）
标签： psse
上传时间： 2022-07-01
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3.DDR布线细节i.MX6DDR的布线，可以将所有信号分成3组：数据线组、地址线组和控制线组，每组各自设置自己的布线规则，但同时也要考虑组与组之间的规则。3.1数据线的交换在DDR3的布线中，可以根据实际情况交换数据线的线序，但必须保证是以字节为单位（数据0~7间是允许交换线序，跨字节是不允许的），这样可以简化设计。■布线尽量简短，减少过孔数量。■布线时避免改变走线参考层面。■数据线线序，推荐DO、D8、D16、D24、D32、D40、D48、D56不要改变，其它的数据线可以在字节内自由调换（see the“Write Leveling"sectioninJESD79-3E■DQS和DQM不能调换，必须在相应通道。3.2DDR3（64bits）T型拓扑介绍当设计采用T型拓扑结构，请确认以下信息。■布线规则见上文表2。■终端电阻可以省略。■布线长度的控制。DDR数量限制在4片以下。
标签： ddr3
上传时间： 2022-07-05
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