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嵌入式FAT32文件系统设计与实现--振南znFAT上下全册
振南这几年一直在研究FAT32文件系统与SD卡、Flash等嵌入式存储的相关技术，初衷一方面在于振南对它的浓厚兴趣，因为其中蕴涵着很多非常巧妙的设计思想和理念，通过更加系统化、工程化的开发实践，自身的水平得到了很大的提升；另一方面随着嵌入式存储技术的迅猛发展，基于通用嵌入式FAT32文件系统的应用与产品层出不穷，这催生了对这方面技术和功能的极大需求。振南希望通过自己的研究，让广大的爱好者与工程师轻松地进入这一领域，对大家产生一定的参考意义。 基于振南长期而深入的研究，一个精简、优秀而功能完备的嵌入式FAT32文件系统方案很早便应运而生，并一直维护至今，这就是振南的znFAT。经过几年的推广
- 2021-05-06下载
- 积分：1
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QT实现自定义UI-精美标题栏支持最小化最大化关闭鼠标拖动改变大小
1：真正意义上的无边框自定义标题栏，支持最小化最大化关闭，支持标题栏双击实现，支持鼠标拖动，支持鼠标在边框处拖动改变窗体大小，网络上的绝大部分都是扯蛋，要么不支持鼠标改变界面大小，要么鼠标移到其它按钮界面瞬间移动等各种不理想状态。2：无任何资源文件，纯QSS实现精美标题栏及自定义按钮样式，可以稍作修改增加更多的样式，QSS真是太强大了！3：使用fontawesome-webfont.ttf字体文件实现最小化最大化关闭等按钮文字，图形文字，很好很强大！4：提供16种各类曲线啥线的绘制，只需点击一下按钮即可切换观看效果！5：主窗体界面与功能界面分离，注释两行代码即可。6：代码最精简，可免
- 2021-05-06下载
- 积分：1
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通信网络基础 西安电子科技大学
通信网络基础 里面有西电考试之前复习的资料，还有课本习题答案
- 2020-12-03下载
- 积分：1
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英飞凌IGBT驱动培训资料
在电力电子装置中的一个重要组成部分,输入连接到控制电路的PWM信号输出端，输出连接到装置各IGBT的门极和发射极，将装置中的控制电路产生的数字PWM信号进行隔离传输和电平转换和功率放大,实现控制电路对IGBT进行开通和关断动作的控制，从而实现装置的功率变换功能。InfineontechnologiesIGBT Gate Drive: Power Suppliesa Gate driving voltage for IGBT+15Vturn-on is normally +15VDriver>□1a Gate driving voltage for IGBTOVturn-off can be oV or negativeWith Single Power Supply5V to-15V)a Negative gate driving voltage+15Vhelps IGBt switch off fasterremain in off state but itDriverneeds dual power suppliesOVWhether to use oV or negativegate driving voltage depends15VWith Dual Power Supplieson the requirement on costZH Liang - Al APperformance05Dec2003agefor internal use onlyInfineon Technologies Asia PacificInfineontechnologiesIGBT Gate Drive: InterfaceOpto-couplers is commonly used as interfacingdevices for applications where both signaltransmission and potential isolation are requiredOpto-couplers offers reliable isolation between IGBT(high-potential)& micro-controller(low-potential)Opto-couplers has long signal delay(us)and isexpensiveIsolation +VDpCCMicroDrivercontrollerZH Liang - Al AP05Dec2003Page 6for internal use onlyInfineon Technologies Asia PacificInfineontechnologiesIGBT Gate Drive: Half-bridge DriveStandard configuration: 2 drivers, 2 power supplies, 2 opto-couplersAdvantages: standard, reliableDisadvantages: using opto-couplers, higher system costIsolation +VDDlCC1DriverCC1MicrocontrollerDD2+VCC2DriverCC2ZH Liang - Al AP05Dec2003Page 7for internal use onlyInfineon Technologies Asia PacificInfineontechnologiesIGBT Gate Drive: Half-bridge DriveIn half-bridge IGBT drive, opto-couplers offer two functions(1)safety isolation &(2) shifting the potential of the gatesignal from uc potential to high-side potentialIf safety isolation between IGBT& micro-controller is notneeded, then"Level Shift" can replace opto-coupling andrealize function(2)OptoHigh-sideHigh-sidecouplerDriverIGBTMicro-Opto-LoW-sideLow-sidecontrollercouplerDriverIGBTZH Liang - Al AP05Dec2003Page 8for internal use onlyInfineon Technologies Asia PacificInfineontechnologiesIGBT Gate Drive Level shiftI FeaturesHVc(600V/1200V)沿PULSERFILTERShort Signal DelayPULSE■Cost- effectiveGEN■ No Safety Isolationevel Shift Half-bridge DriverI BenefitHigh-side““°IGBTO Saving Opto-couplersLevel(lower system costShiftMicro● Wider range ofcontrollerLevelLow-side■■■■■直■口m留■Switching FrequencyShiftIGBT(higher flexibility)ZH Liang - Al AP05Dec2003Page 9for internal use onlyInfineon Technologies Asia PacificInfineontechnologiesIGBT Gate Drive: CLTNEWO CLT-Coreless Transformer (for signal transmissionu Coils(Primary Secondary Side)realized on SiliconO Short Signal Delay (allowing high or low switching frequencyu Lower Cost(compared to 1200V level-shift driver日 Safety IsolationCLT Half-bridge DriverHigh-sideCLT Single DriverIGBTCLTMicro-controllerCLTIGBTMicro-controllerLoW-sideIGBTZH Liang - Al AP05Dec2003agefor internal use onlyInfineon Technologies Asia PacificInfineontechnologiesIGBT Gate Drive: Boot-strapBoot-strap circuit includes only a diode and a capacitora In half-bridge drive, the boot-strap circuit can replace the high-sidepower supply and make single-supply operation possibleWhen the low-side IGBT (or FWD)is on, the diode is forwardbiased and the capacitor is charged by the low-side power supplyvia the low-side IGBT and stores the energyWhen the low-side IGBt(and FWD)is OFF, the diode is reversebiased and blocks the dc-bus voltage to protect the low-sidecircuit. Meanwhile, the capacitor supplies energy to the high-sidedriverThe boot-strap capacitance should be high enough to keep thesupply voltage stable Capacitance needed can be calculatedbased on the working conditions and device parametersZH Liang - Al AP05Dec2003agefor internal use onlyInfineon Technologies Asia PacificInfineontechnologiesIGBT Gate Drive: Boot-strap circuitConventional2心菲*|■3 high-side power supplies■1|oW- side power supplyUsing boot-strap circuit心体心心●3 diodes& capacitorso 1 low-side power supplyFeaturesa Diode: ultra-fast recoverya Capacitor: general-purposed ITAa Dependent on low-side IGBTBenefitsSaving 3 PS(transformer cost)22ZH Liang - Al AP05Dec2003Reducing wiring connectionPage 12for internal use onlyInfineon Technologies Asia Pacific
- 2020-12-11下载
- 积分：1
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rn8209单相电能计量芯片程序
RN8209能够测量有功功率，无功功率，用功电能，无功电能，同时可测量电流，电压有效值等
- 2020-11-06下载
- 积分：1
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人事管理系统（java数据库课程设计）+SQL数据库
员工各种信息：包括员工的基本信息，如编号、姓名、性别、学历、所属部门、毕业院校、健康情况、职称、职务、奖惩等；员工各种信息的修改；对转出、辞退、退休员工信息的删除；按照一定条件，查询、统计符合条件的员工信息；教师教学信息的录入：教师编号、姓名、课程编号、课程名称、课程时数、学分、课程性质等。科研信息的录入：教师编号、研究方向、课题研究情况、专利、论文及著作发表情况等。按条件查询、统计，结果打印输出。
- 2020-06-29下载
- 积分：1
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RS编解码VERILOG实现
RS 编码器，译码器，主要采用FPGA来实现软件使用verilog语言，从原理到硬件的实现，进行了功能仿真 以及板上调试，验证正确
- 2020-11-30下载
- 积分：1
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LMS,自适应陷波器，自适应RLS自适应算法等5种算法的MATLAB程序
利用matlab求线性调频信号的特征，lms算法求滤波后的各种特征参数
- 2020-06-26下载
- 积分：1
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梦幻西游抓鬼纯源码
自己写的抓鬼源码 改一改基址啥的 可以运行起来 卡点或者bug自己下断点可以改改 最近没时间写了
- 2020-12-01下载
- 积分：1
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C#实现的基于BP神经网络的数据预测（降雨量+铁矿石进口量预测）（有界面）
使用BP神经网络对样本数据（某水库年降雨量监测数据 + 中国铁矿石年进口量监测数据）进行操作，生成需要的训练数据和测试数据。并使用这些数据进行训练处误差小于指定要求的网络，之后可根据界面获取需要预测的年限，并最终进行预测
- 2020-12-06下载
- 积分：1
