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因此，您想編寫一個(gè)內(nèi)核模塊。您知道C，您已經(jīng)編寫了一些可以作為進(jìn)程運(yùn)行的常規(guī)程序，現(xiàn)在您想知道真正的動(dòng)作在哪里，一個(gè)通配指針可以擦掉文件系統(tǒng)，核心轉(zhuǎn)儲(chǔ)意味著重新啟動(dòng)。內(nèi)核模塊到底是什么？模塊是可以根據(jù)需要加載和卸載的代碼段。它們擴(kuò)展了內(nèi)核的功能，而無需重新引導(dǎo)系統(tǒng)。例如。模塊驅(qū)動(dòng)程序的一種類型是設(shè)備驅(qū)動(dòng)程序，它允許內(nèi)核訪問沒有模塊的系統(tǒng)硬件，我們將不得不構(gòu)建單片內(nèi)核并將新功能直接添加到內(nèi)核映像中，除了具有更大的內(nèi)核之外，這還具有缺點(diǎn)每次我們想要新功能時(shí)都要求我們重建并重新啟動(dòng)內(nèi)核的過程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
標(biāo)簽：
linux
上傳時(shí)間：
2022-03-30
上傳用戶：
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電學(xué)中的測(cè)量技術(shù)涉及范圍非常廣,電流測(cè)量在電學(xué)計(jì)量中占有非常重要的位置。如何精確地進(jìn)行電流測(cè)量是精密測(cè)量的一大難題。傳統(tǒng)的電流檢測(cè)電路多采用運(yùn)算放大芯片與片外電流檢測(cè)電路相結(jié)合的方式,電路集成度很低,需要較多的接口和資源才能完成對(duì)電路的檢測(cè)。本文把所有電路部分都集成在一塊芯片上,包括檢測(cè)電阻,運(yùn)算放大器電路及模擬轉(zhuǎn)數(shù)字轉(zhuǎn)換電路,從而在電路內(nèi)部可以進(jìn)行電流檢測(cè),使電路更好的集成化。前置電路使用二級(jí)共源共柵結(jié)構(gòu)的運(yùn)算放大器,減小溝道長(zhǎng)度調(diào)制效應(yīng)造成的電流誤差。10位SAR ADC中采用電容驅(qū)動(dòng)能力強(qiáng)的傳輸門保證了模數(shù)轉(zhuǎn)化器的有效精度。比較器模塊采用再生鎖存器與遲滯比較器作為基礎(chǔ)單元組合解決精密測(cè)量的問題。本設(shè)計(jì)可以作為嵌入芯片內(nèi)的一小部分而檢測(cè)芯片中的微小電流1mA~100mA,工作電壓在1.8v左右,電流檢測(cè)精度預(yù)期達(dá)到10uA的需求。The measurement technology in electricity involves a wide range,and current measurement plays a very important position in electrical measurement.How to accurately measure current is a big problem in precision measurement. The traditional current detecting circuit adopts the combination of the operational amplifier chip and theoff-chip current detecting circuit, The circuit integration is very low, and more interfaces and resources are needed tocomplete the circuit detection.This topic integrates all the circuit parts into one chip, including detection resistance, operational amplifier circuit andanalog to digital conversion circuit. Highly integrated circuit makes the external resources on the chip more intensive,so that current detection can be carried out inside the circuit, so that the circuit can be better integrated. Thefront-end circuit of this project uses two-stage cascade operational amplifier and cascade tube to reduce the currenterror caused by channel length modulation effect. In 10-bit SAR ADC, the transmission gate with strong capacitivedriving ability ensures the effective accuracy of the analog-to-digital converter. Comparator module uses regenerativelatch and hysteresis comparator as basic unit to solve the difficult problem of precision measurement. This topic can beused as a small part of the embedded chip to detect the micro-current in the chip 1 mA~100 mA, the working voltageis about 1.8v, and the current detection accuracy is expected to reach the requirement of 10 uA.
標(biāo)簽：
電流檢測(cè)
電路
運(yùn)算放大器
adc
上傳時(shí)間：
2022-04-03
上傳用戶：
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本文首次設(shè)計(jì)并驗(yàn)證了基于macom三合一芯片設(shè)計(jì)的光模塊電路,該電路旨在提供一種滿足SFF-8472中規(guī)定的數(shù)字診斷功能的低成本SFP+模塊。電路采用激光器驅(qū)動(dòng)、限幅放大器、控制器以及時(shí)鐘恢復(fù)單元集成的單芯片,在保證高精度數(shù)字診斷功能基礎(chǔ)上,實(shí)現(xiàn)了低成本高可靠的特點(diǎn)。該電路在光接收接口組件與激光器驅(qū)動(dòng)和限幅放大器單元的限幅放大器部分之間接入濾波器來提高模塊的靈敏度及信號(hào)質(zhì)量。在控制器單元的數(shù)字電位器的引腳上采用外加電阻的方式避免出現(xiàn)上電不發(fā)光的故障問題。該研究結(jié)果為下一代SFP-DD光模塊設(shè)計(jì)與開發(fā)工作,奠定了一定的理論與實(shí)踐基礎(chǔ)。This paper designs and validates the optical module circuit based on the MACOM Trinity chip for the first time.This circuit aims to provide a low-cost SFP module which meets the digital diagnosis function specified in SFF-8472.The circuit uses a single chip integrated with laser driver,limiting amplifier,controller and clock recovery unit.On the basis of ensuring high precision digital diagnosis function,it achieves the characteristics of low cost and high reliability.The circuit connects a filter between the optical receiving interface module and the limiting amplifier part of the laser driver and limiting amplifier unit to improve the sensitivity and signal quality of the module.The pin of the digital potentiometer in the controller unit is equipped with an external resistance to avoid the problem of power failure.The research results lay a theoretical and practical foundation for optical module design in high-speed data center.
標(biāo)簽：
sfp
光收發(fā)模塊
上傳時(shí)間：
2022-04-03
上傳用戶：
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針對(duì)目前MSP430單片機(jī)實(shí)驗(yàn)裝置較少、實(shí)驗(yàn)內(nèi)容少,而且無MSP430高端產(chǎn)品的實(shí)驗(yàn)裝置,研制了基于MSP430F5529單片機(jī)的綜合實(shí)驗(yàn)裝置,主要包括MSP430 Launch Pad和母板兩部分。較傳統(tǒng)的單片機(jī)實(shí)驗(yàn)裝置增加了模擬電路的設(shè)置,設(shè)計(jì)的實(shí)驗(yàn)?zāi)軌蚶脝纹瑱C(jī)的所有外設(shè),可進(jìn)行模塊基礎(chǔ)實(shí)驗(yàn)和綜合實(shí)驗(yàn)兩大類實(shí)驗(yàn),非常適合自動(dòng)化和電氣信息類大學(xué)生學(xué)習(xí)使用。Concerning with the lack of experimental equipment and content based on MSP430,and especially,the experimental equipment of MSP430 senior products,an experimental equipment based on MSP430F5529 microcontroller is developed. It mainly consists of two parts： MSP430 Launch Pad and main board. Compared with traditional microcontroller experiment equipment,a few analog circuits were added. The experiment we set up takes advantage of all microcontroller peripherals. Students can do two kinds of experiments： module experiment and complex experiment.Therefore it fits university students in automation and electrical major very well.
標(biāo)簽：
msp430f5529
單片機(jī)
上傳時(shí)間：
2022-04-13
上傳用戶：
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HC-SR501 High Sensitivity Human Infrared Sensor Module Pyroelectric PCB.doc人體紅外感應(yīng)原理圖
標(biāo)簽：
紅外感應(yīng)
上傳時(shí)間：
2022-04-18
上傳用戶：
-
基于TMS320F28335的超聲波流量計(jì)硬件原理圖+軟件源碼本文以TMS320F28335 處理器為核心，設(shè)計(jì)一種用于管道流量測(cè)量的超聲波流量計(jì)。系統(tǒng)硬件由核心板，超聲波發(fā)射和接收電路，切換電路，超聲換能器，基于ADS805 的高速信號(hào)采集電路，人機(jī)交互以及電源等模塊構(gòu)成。采用時(shí)差法進(jìn)行管道流量測(cè)量，時(shí)差測(cè)量采用SCOT 加權(quán)的廣義互相關(guān)時(shí)延估計(jì)算法。本論文設(shè)計(jì)的超聲波流量計(jì)具有測(cè)量速度快、準(zhǔn)確性好、成本低等優(yōu)點(diǎn)。關(guān)鍵字：C2000，超聲波，流量，廣義互相關(guān)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
標(biāo)簽：
tms320f28335
超聲波流量計(jì)
上傳時(shí)間：
2022-05-06
上傳用戶：
-
基于TMS320F28035芯片為控制核心的空間矢量異步電機(jī)變頻器 我們?cè)O(shè)計(jì)的異步電機(jī)變頻調(diào)速器以TMS320F28035芯片為控制核心，通過輸出三相PWM波控制智能功率模塊IPM驅(qū)動(dòng)三相異步電機(jī)。我們使用空間矢量SVPWM算法，并對(duì)其進(jìn)行了優(yōu)化。采用檢測(cè)反電勢(shì)的方法省去了昂貴的光電編碼器，大大節(jié)省了成本。同時(shí)開創(chuàng)性的研發(fā)了自動(dòng)根據(jù)運(yùn)行環(huán)境調(diào)節(jié)的自適應(yīng)變頻算法，使我們的變頻調(diào)速器可以在電網(wǎng)條件惡劣的鄉(xiāng)村山區(qū)工作，由此該變頻器已被一家民用水泵生產(chǎn)企業(yè)預(yù)訂。關(guān)鍵字 變頻器 TMS320f28035 IPM SVPWM In our design, the asynchronous machine inverter based on the chip of TMS320F28035 drives the three-Phase asynchronous machine by sending three-phase PWM waves to the IPM, which is short for the Intelligent-Power-Module. The SVPWM (space vector pulse width modulation) strategy is applied to our control algorithm and we optimize it mainly in two aspects. Firstly the inverter detects the speed by measuring the Back EMF instead of installing an expensive photoelectric encoder for costs reduction.
標(biāo)簽：
tms320f28035
芯片
上傳時(shí)間：
2022-05-08
上傳用戶：zhanglei193
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說明： 基于CC2541藍(lán)牙模塊與單片機(jī)的串口通信，ble藍(lán)牙透?jìng)?，安卓手機(jī)app與源碼，串口調(diào)試助手(Based on CC2541 Bluetooth module and MCU serial communication, ble Bluetooth transparent transmission, Android mobile app and source code, serial debugging assistant)
標(biāo)簽：
cc2541
藍(lán)牙
單片機(jī)
串口通信
上傳時(shí)間：
2022-05-16
上傳用戶：
-
說明： STM8S單片機(jī)驅(qū)動(dòng)CC1101 433無線模塊 實(shí)現(xiàn)發(fā)送數(shù)據(jù)和接收數(shù)據(jù)。(STM8S single-chip microcomputer drives CC1101 433 wireless module to transmit data and receive data)
標(biāo)簽：
stm8s
單片機(jī)
驅(qū)動(dòng)
上傳時(shí)間：
2022-05-16
上傳用戶：
-
ap6255驅(qū)動(dòng)ap6255是一款支持藍(lán)牙BT4.2+WiFi支持11ac雙頻的藍(lán)牙11ac雙頻WiFi二合一模塊，采用博通BCM43455方案，支持Win10/Android操作系統(tǒng)；ap6255無線模塊符合IEEE802.11 a/b/g/n/ac標(biāo)準(zhǔn)，能在802.11ac單流下實(shí)現(xiàn)433.3Mbps的速率連接到無線局域網(wǎng)。綜合mODULE提供了用于藍(lán)牙的wifi、UART/PCM接口的SDIO接口。該緊湊模塊是WiFi+BT技術(shù)的組合的總解決方案。本模塊專為智能手機(jī)和便攜式設(shè)備開發(fā)。AP6255特性：IEEE802.11a/b/g/n/ac雙頻虛擬同步雙頻無線電單流空間復(fù)用高達(dá)433.3 mbps的數(shù)據(jù)速率支持20，40，80兆赫頻道的可選SGI(256 QAM調(diào)制)帶集成Class1PA和低能量(BLE)支持的藍(lán)牙v4.0+EDR并發(fā)藍(lán)牙和WLAN操作單天線同時(shí)接收BT/WLAN支持標(biāo)準(zhǔn)SDIOV3.0，并與SDIOv2.0主機(jī)接口向后兼容:SDIOV3.0（4位）-在SDR104模式下最高可達(dá)208MHz時(shí)鐘速率BT主機(jī)數(shù)字接口：-UART(高達(dá)4 Mbps)成的模具解決方案ECI-增強(qiáng)的共存支持、協(xié)調(diào)WLAN接收的BTSCO傳輸?shù)哪芰?/p>
標(biāo)簽：
ap6255
驅(qū)動(dòng)
藍(lán)牙
上傳時(shí)間：
2022-05-20
上傳用戶：
