1. Preface2. The concept2.2. Prescience 2.3. Reading guide 2.4. Abbreviations 2.5. Version management3. Hardware3.2. ESP32 3.3.2. Hardware schema 3.3.3. DHT22 and level shifter 3.3.4. Geekcreit? ESP32 Development Board4. Software4.2. Installatie van GIT 4.3. Installatation of the ESP32 Core 4.4. Installation of the Xtensa and ESP32 Tools 4.5. Python 4.5.1. Install Python 4.5.2. Installation of pySerial and EspTool 4.6. Test the software installation5. The ESP32 IoT project 5.1.1. WiFi connection 5.1.2. Setup date and time 5.1.3. MQTT connection 5.1.4. Determining temperature and humidity 5.2. IOT_ESP32_Project source6. Test6.2. ESP32, NodeJS, MongoDB en Mosca 6.2.1. START MongoDB 6.2.2. START NodeJS Express serve and Mosca broker 6.2.3. START the ESP32 6.2.4. START an Chrome browser
上傳時(shí)間: 2022-04-05
上傳用戶:kingwide
隨著電磁閥在工業(yè)和日常應(yīng)用的增多,其功耗越來(lái)越被人們所重視。通過(guò)對(duì)電磁閥驅(qū)動(dòng)電路的研究,設(shè)計(jì)一套電磁閥節(jié)能驅(qū)動(dòng)電路。不僅提高了電磁閥的響應(yīng)時(shí)間,更重要的是降低了功耗,使電磁閥由工作在大電流狀態(tài)下,變成大電流啟動(dòng)小電流維持的工作狀態(tài)。減少了由電流過(guò)大引起的電磁閥線圈過(guò)熱,增加了電磁閥的安全性。The power consumption of an electromagnetic valve is drawing increasingly more attentiori as it is widely used in industrial production and daily life. In this study, an energy - saving driving circuit of electromagnetic valves was designed. It can make an electromagnetic valve to START with a high current while work with a low current; thereby the power consumption can be reduced. Besides, it can shorten the response time of an electromagnetic valve and improve the security of the valve.
標(biāo)簽: 電磁閥 節(jié)能驅(qū)動(dòng)電路
上傳時(shí)間: 2022-04-16
上傳用戶:
分享一份成熟量產(chǎn)的15KW充電模塊電路圖:一共500V30A、750V20A兩款機(jī)型每款機(jī)型包括PFC功率板、PFC控制板、LLC功率板、LLC控制板PFC功率板:為AC轉(zhuǎn)DC電路,PFC整流采用的是維也納I型整流;PFC控制板:控制PFC功率輸出;LLC功率板:為DC轉(zhuǎn)DC電路,DCDC變換采用的是半橋LLC三電平拓?fù)洌籐LC控制板:控制LLC功率輸出; 附件內(nèi)容:系統(tǒng)仿真如下:
上傳時(shí)間: 2022-04-22
上傳用戶:
ContentsMIPI是什么?o D-PHY物理層特點(diǎn)?МIРI 的數(shù)據(jù)傳送oDSI&CSI應(yīng)用MIPI:手機(jī)產(chǎn)業(yè)處理界面MIPI協(xié)議是手機(jī)行業(yè)的領(lǐng)導(dǎo)者倡導(dǎo)一個(gè)開(kāi)放的移動(dòng)接口標(biāo)準(zhǔn)MIPI Spec:DCS-顯示命令接口DBI-顯示總線接口DPI-顯示像素接口DSI一顯示串行接口CSI一顯示攝像接口D-PHY物理層MIPI特點(diǎn)低功耗模式·動(dòng)態(tài)調(diào)整到低功耗模式、高速傳送模式和低信號(hào)擺幅模式。高速模式每通道可以傳送500-1000Mbps低成本物理層EMI(抗輻射)數(shù)據(jù)包報(bào)頭(4 bytes)數(shù)據(jù)標(biāo)識(shí)符(DI*1byte:包含虛擬數(shù)據(jù)通道[7:6]和數(shù)據(jù)類型[5:0].,數(shù)據(jù)包*2byte:要傳送的數(shù)據(jù),長(zhǎng)度固定兩個(gè)字節(jié)。誤差校正碼(ECC)"1byte:可以把兩個(gè)位的錯(cuò)誤糾正例程數(shù)據(jù)包報(bào)頭(4 bytes)數(shù)據(jù)標(biāo)識(shí)符(Di)*1byte:包含虛擬數(shù)據(jù)通道[7:6]和數(shù)據(jù)類型[5:0].字?jǐn)?shù)(WC)*2byte:傳送數(shù)據(jù)的長(zhǎng)度,固定為兩個(gè)字節(jié)錯(cuò)誤校驗(yàn)碼(ECC)*1byte:可以修復(fù)兩個(gè)位的錯(cuò)誤有效傳送數(shù)據(jù)(0~65535 bytes)最大字節(jié)-2^16.數(shù)據(jù)包頁(yè)腳(2 bytes):校驗(yàn)如果數(shù)據(jù)包的有效長(zhǎng)度為0,那么校驗(yàn)位為FFFFh如果校驗(yàn)碼不能計(jì)算,那么校驗(yàn)碼的值為0000h數(shù)據(jù)包的長(zhǎng)度:e4+(0-65535)+2-6~ 65541 bytesSync Event(H START,H End,v START,V End),Data Type =xx 0001(x1h)同步事件是兩個(gè)字的數(shù)據(jù)包(1個(gè)字節(jié)的指令和一個(gè)字節(jié)的校驗(yàn),因些他們可以精確的表示同步事件的開(kāi)始和結(jié)束.干單個(gè)司步開(kāi)始或同步結(jié)束事件的長(zhǎng)度和位置在前面的圖中有說(shuō)明。同步事件的定義如下:Data Type= 00 0001(01h)場(chǎng)同步開(kāi)始Data Type= 01 0001(11h)場(chǎng)同步結(jié)束Data Type= 10 0001(21b)行同步開(kāi)始.Data Type= 11 0001(31h)行同步結(jié)束為了盡可能精確的體理一個(gè)同步事件,那么開(kāi)始標(biāo)識(shí)位必須放在第一位,結(jié)束標(biāo)識(shí)位必須放在最后一位,行同步也是一樣。同步事件的開(kāi)始和結(jié)束應(yīng)該是成對(duì)出現(xiàn)的,假如只有一個(gè)同步事件(通常是開(kāi)始),那么這個(gè)數(shù)據(jù)也是可以傳送出去的。
標(biāo)簽: mipi
上傳時(shí)間: 2022-05-08
上傳用戶:
Yocto-Project-Quick-START官方文檔的中文版本
標(biāo)簽: yocto
上傳時(shí)間: 2022-05-10
上傳用戶:
該文件是器件官方元件封裝的文件,用cadence,打開(kāi)后綴為bxl的文件。 下載的Ultra Librarian 軟件; Ultra Librarian提供了一個(gè)基于云的庫(kù),該庫(kù)中有超過(guò) 8 百萬(wàn)種符號(hào)、封裝,以及帶有供貨商 ECAD 中性數(shù)據(jù)輸出選擇的 3D 模型。該庫(kù)以業(yè)內(nèi)最大的 ECAD 元器件庫(kù)為后盾,代表了 400 多家制造商。輕松找到您所需的零件,導(dǎo)出至 22 種不同的 CAD 工具。該庫(kù)每天更新,為您提供滿足 PCB 設(shè)計(jì)需求的最準(zhǔn)確零件。 打開(kāi) Ultra Librarian軟件,導(dǎo)入bxl后綴文件,選擇需要轉(zhuǎn)換的文件類型,最后導(dǎo)出文件。 然后就可以用cadence或者AD打開(kāi)該庫(kù)。該文件生成edf和cfg文件。 再用orcad capture cis軟件打開(kāi),file>import design >edif> open(edf) configation(cfg)然后就可以生成dns工程,就會(huì)在目標(biāo)路徑下產(chǎn)生olb和obk文件,是原理圖文件,可以用orcad capture cis軟件打開(kāi)。 附加導(dǎo)入Altium Designer:首先,按照所給鏈接下載ULib文件,解壓,并將解壓后的文件安裝。打開(kāi)桌面上的Ultra應(yīng)用程序。打開(kāi)后彈出一個(gè)對(duì)話框,選擇繼續(xù)免費(fèi)使用。然后彈出主程序窗口,在步驟一里面加載我們需要轉(zhuǎn)換的BXL文件。并且在下面選擇Altium designer,。選擇步驟三的export to selected tools ,并生成一個(gè)log.txt文件。用AD打開(kāi)剛生成的UL_Import.PrjScr文件,。打開(kāi)工程文件后,并將鼠標(biāo)光標(biāo)移動(dòng)到UL_Import.Pas文件下且選中。點(diǎn)擊箭頭所指運(yùn)行按鈕。在彈出的對(duì)話框UL Import下,選擇剛生成的LOG.txt文件。最后點(diǎn)擊輸出START import按鈕,即可把bxl庫(kù)文件轉(zhuǎn)換為AD封裝庫(kù)文件。生成的庫(kù)文件。
上傳時(shí)間: 2022-06-01
上傳用戶:xsr1983
相信大家有移植經(jīng)驗(yàn)的都知道,移植確實(shí)是一件非常墨跡的事情,怎么說(shuō)呢,代碼都是別人的,風(fēng)格也是別人的,文件結(jié)構(gòu),定義之類都是別人的,看別人的東西是種進(jìn)步,但是,也是一個(gè)痛苦的過(guò)程,因?yàn)橛袝r(shí)候資料確實(shí)很少,而且有時(shí)候還是E文的,專業(yè)名詞一大堆,我們根本沒(méi)有辦法想象工作量是多么的巨大.不過(guò)事情都是這樣,你不懂他的時(shí)候他就像是巨山,但是一旦你理解他的時(shí)候,你才會(huì)感覺(jué)到原來(lái)他是那么的簡(jiǎn)單(從我的經(jīng)驗(yàn)上來(lái)看,至少應(yīng)該是這樣的).好吧,閑話少說(shuō),我們就來(lái)開(kāi)始我們的移植之旅把.首先,我們需要準(zhǔn)備的東西有uCGUI3.90,這個(gè)版本是大家現(xiàn)在用的比較多的,效率也比較高,別人都是這么評(píng)論的,至于其他版本的,我沒(méi)有接觸很多,所以不能過(guò)多評(píng)論.UCGUI有三個(gè)文件夾,一個(gè)是tool,這個(gè)文件夾是用來(lái)使用一些uCgui的上位機(jī)程序,基本都是字體和模板查看之類的,在sample文件夾下面是已經(jīng)別人都你寫(xiě)好了很多有用的東西,像跟操作系統(tǒng)有關(guān)的GUT×或者一些模板(后面我們會(huì)用到的自己定義的Demo),或者是gui配置.后面再 詳細(xì)敘說(shuō)這個(gè)文件央的功能.在START文件夾里面,這是我們最主要的文件夾,里面就包含了uCGUI的源代碼,uCGUI的作者把源代碼放進(jìn)vc里面進(jìn)行編譯了(當(dāng)然,這是用標(biāo)準(zhǔn)C語(yǔ)言寫(xiě)的程序,所以我們可以放在任何C語(yǔ)言平臺(tái)下編譯而不會(huì)擔(dān)心兼容性問(wèn)題,這個(gè)uCGUI在這方面做的算是完美了),所以,我們可以在vc平臺(tái)下寫(xiě)界面,然后再把代碼拷進(jìn)我們的下位機(jī)編譯器進(jìn)行編譯,這樣子效率就會(huì)非常高了.(像51那時(shí)候?qū)懡缑婢褪钳偪竦囊淮我淮蔚臒媸羌m結(jié).).
上傳時(shí)間: 2022-06-19
上傳用戶:
eMMC存儲(chǔ)介質(zhì)目前越來(lái)越廣泛的應(yīng)用在嵌入式系統(tǒng)中,AM335x的用戶也越來(lái)越多的使用EMMC作為系統(tǒng)的主要存儲(chǔ)介質(zhì)。目前 AM335x的幾款官方demo板中,只有BeagleBone Black上加入了對(duì)eMMC芯片的支持,很多用戶也是參考 BeagleBone Black進(jìn)行自己AM335x系統(tǒng)的eMMC設(shè)計(jì)。筆者最近分別通過(guò) TI Uniflash和SD卡完成了BeagleBone Black上 eMMC芯片的燒寫(xiě)驗(yàn)證工作,軟件基于 AM335x Linux SDKO6總結(jié)出來(lái)供大家參考。1,使用TI UniFlash工具通過(guò)USB RNDIS堯?qū)?.1 TI Uniflash簡(jiǎn)介Uniflash是TI開(kāi)發(fā)的存儲(chǔ)器燒寫(xiě)工具,可以支持 AM335x系統(tǒng)的NAND Flash NOR Flash,SPI Flash eMMC燒寫(xiě)。可以參考 wiki上的guide:btto://processors.wiki.ti.com/index.php/Sitara Uniflash Quick START Guide,在Windows宿主機(jī)上下載并安裝 Uniflash,并按照其中 3.3節(jié)所述在Windows宿主機(jī)上安裝USB RNDIS驅(qū)動(dòng)。1.2 eMMC燒寫(xiě)原理本文介紹的驗(yàn)證方法是使用 Uniflash工具通過(guò)USB對(duì)BeagleBone Black上的eMMC進(jìn)行燒寫(xiě),原理是通過(guò)Romcode,SPL和u-boot三個(gè)階段,將一個(gè)專門(mén)用于 eMMC燒寫(xiě)的Linux操作系統(tǒng)在BeagleBone Black板上運(yùn)行起來(lái),并自動(dòng)運(yùn)行腳本進(jìn)行燒寫(xiě)。
標(biāo)簽: BeagleBone Black eMMC
上傳時(shí)間: 2022-06-26
上傳用戶:
Datasheet SHT3x-DISHumidity and Temperature Sensor? Fully calibrated, linearized, and temperaturecompensated digital output? Wide supply voltage range, from 2.4 V to 5.5 V? I2C Interface with communication speeds up to 1MHz and two user selectable addresses? Typical accuracy of ? 2 %RH and ? 0.3 °C? Very fast START-up and measurement time? Tiny 8-Pin DFN package
上傳時(shí)間: 2022-06-29
上傳用戶:
PrefaceDuring the past years, there has been a quickly rising interest in radio access technologies for providingmobile as well as nomadic and fixed services for voice, video, and data. The difference indesign, implementation, and use between telecom and datacom technologies is also becoming moreblurred. One example is cellular technologies from the telecom world being used for broadband dataand wireless LAN from the datacom world being used for voice-over IP.Today, the most widespread radio access technology for mobile communication is digital cellular,with the number of users passing 5 billion by 2010, which is more than half of the world’s population.It has emerged from early deployments of an expensive voice service for a few car-borne users,to today’s widespread use of mobile-communication devices that provide a range of mobile servicesand often include camera, MP3 player, and PDA functions. With this widespread use and increasinginterest in mobile communication, a continuing evolution ahead is foreseen.This book describes LTE, developed in 3GPP (Third Generation Partnership Project) and providingtrue 4G broadband mobile access, STARTing from the first version in release 8 and through the continuingevolution to release 10, the latest version of LTE. Release 10, also known as LTE-Advanced,is of particular interest as it is the major technology approved by the ITU as fulfilling the IMTAdvancedrequirements. The description in this book is based on LTE release 10 and thus provides acomplete description of the LTE-Advanced radio access from the bottom up.Chapter 1 gives the background to LTE and its evolution, looking also at the different standardsbodies and organizations involved in the process of defining 4G. It also gives a discussion of the reasonsand driving forces behind the evolution.Chapters 2–6 provide a deeper insight into some of the technologies that are part of LTE and itsevolution. Because of its generic nature, these chapters can be used as a background not only for LTEas described in this book, but also for readers who want to understand the technology behind othersystems, such as WCDMA/HSPA, WiMAX, and CDMA2000.Chapters 7–17 constitute the main part of the book. As a START, an introductory technical overviewof LTE is given, where the most important technology components are introduced based onthe generic technologies described in previous chapters. The following chapters provide a detaileddescription of the protocol structure, the downlink and uplink transmission schemes, and the associatedmechanisms for scheduling, retransmission and interference handling. Broadcast operation andrelaying are also described. This is followed by a discussion of the spectrum flexibility and the associated
標(biāo)簽: 4g 移動(dòng)通信
上傳時(shí)間: 2022-07-08
上傳用戶:
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