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Self-written a small program, to 51 of the friends to use, measured also OK, no problem, but a few meters above is not accurate, mainly the module is relatively inexpensive, when practiced hand used. The comments are also clear. /* Ultrasonic ranging procedures, the use of 51 MCU external interrupt, if sometimes found not working, we recommend the direct use of the DuPont line connection pin */#include

First download a SDCC1:sudo Apt-get Install SDCC2:sudo Apt-get Install Libvte-dev3: Install Gstc-isp: http://sourceforge.net/projects/gstcisp/files/Gstc-isp Installation Method1: Unzip TAR-ZXVF gstc-isp_v1.0.tar.gz2: Enter directory Gstc-isp3: Run./configure4: Enter into the SRC directory, open makefile Cflags =-g-o2 to Cflags =-g-o2-i/usr/include/vte-0.0/5: Compile and install: make; Make install6: Run the available commands GstcispHow to use 1:SDCC file.c2: Generate Bin file sdcc file.c makebi

been welded in advance, no external connection required). The buzzer picks up the P2.1. 3. Algorithm part By detecting whether the key is pressed or pressed, start detection and then detect if the key is released. At the same time buzzer sound prompts to start detection, to trig feet at least 10us high level signal, the module automatically send 8 40khz square wave, automatic detection of whether there is a signal return, there is a signal return, through the echo foot output a high level, high

circuit in the smallest system is essential, whenever the power is connected, we hope that the microcontroller can restart the work, this time need to reset the circuit Also pull out the components from the library, connect the components with the wire, and end up with the chip's RST pin. Here are two ways: ① directly with the line to connect the Reset Circuit unit to the RST PIN ② method of using network marking In the minimum system schematic diagram, both methods can be, but if it is a more

51Testing requires "original first" or "foreign original translation" of the manuscript, the form includes but not limited to software testing experience, experience, insights, feelings, essays, notes and all related to the software testing content of all manuscripts. Manuscript requirements and royalties related instructions: 1, original article---rookie also can boil wine on heroes, please see the details of http://bbs.51testing.com/thread-77515-1-1.html 2, translation of the article--

, #6AH, L2The contents of 62 to 69 are compared to 60, and the last 60 is the minimum value.INC R0MOV 51h,r0MOV r1,51hINC R1Cjne R0, #69H, L2, the content in 61 is compared with the content from 62 to 69, and the content in 61 is the second small value, and so on, until the last two digits are compared.SJMP $END///////////////////////////////The second method (advocated by this method, only two loops, logic is strong, not easy to understand, the advantage is conducive to transplant)/////////////

51 common codes of Asp.net, asp. net51 1. // the dialog box is displayed. Click to go to the specified page. 2. // pop-up dialog box 3. // delete an object 4. // bind the drop-down list box datalist 5. // display the time in seconds 6. // link to the title 7. // modify the redirection 8. // The OK button is displayed. 9. // format the output data "{0: F2}". The format F2 indicates that there are two digits after the decimal point. 10. // extract dynam

parameter passed to operator new[] may have a value that is larger than the memory of the generation object, since clause 16 mentioned that dynamically allocated arrays may contain additional space to hold the number of elements.Second , C + + guarantees that the deletion of pointers is always safe, so in the program, we operate with the following code for NULL pointers:voidoperatordelete(voidthrow(){ if(rawMemory==0return; 归还rawMemory所指内存;}finally, we should always remember the oppositio

"/>(Fig. 2) 2014 the first half of the global operating system version share trend chartAccording to the 2,IDC commentary network, Windows 7 and Windows XP have maintained this trend for almost half a year (February 2014 to July). In July, the share of Windows 7 increased to 51.22%, down 0.67%. It is visible that Windows 7 has occupied half the world's market, and the growth trend continues. In contrast, the former overlord Windows XP, its share fell to 24.82%, the last month, the decline of 0.

SQL Server 2016 installation error prompt: You need to install oracle JRE7 update 51 (64-bit) or a later version to solve the problem, 2016jre7 Cause of error: JDK is not installed on the computer and is in version 7) Solution: Install JDK on the following website, configure environment variables, and reinstall SQL Server 2016. Http://www.oracle.com/technetwork/java/javase/downloads/java-archive-downloads-javase7-521261.html Select accept protocol

Java record-51-stack and queueStack and Queue Stack (Stack): Stack is also a special linear table, which is a post-import, first-out (LIFO) structure. Stack is a linear table that only inserts and deletes operations at the end of a table. The end of a table is called the top table and the header is called the bottom table ). The stack physical storage can use the sequential storage structure or the chained storage structure. Queue: a Queue defines tha

smart Jie classroom650) this.width=650; "title=" 00.png "src=" http://s5.51cto.com/wyfs02/M00/7C/EF/wKioL1bc8XHySeiBAAAs2MBEZnc010.png "alt=" Wkiol1bc8xhyseibaaas2mbeznc010.png "/>More ProductsIOS,Cocos, mobile Design course please pay attention to the official website of Chi Jie Classroom:http://www.zhijieketang.comSmart-Jie Classroom Forum Website:http://51work6.com/forum.phpThis article is from the "Dongsheng-ios Technical Consultant" blog, make sure to keep this source http://tonyguan.blog.

Python built-in functions (51) -- property, pythonproperty English document: Classproperty(Fget = None,Fset = None,Fdel = None,Doc = None) Return a property attribute. FgetIs a function for getting an attribute value.FsetIs a function for setting an attribute value.FdelIs a function for deleting an attribute value. AndDocCreates a docstring for the attribute. If given,DocWill be the docstring of the property attribute. Otherwise, the property will cop

Commercial Territory (http://blog.csdn.net/omni360/)This article follows "Attribution-non-commercial use-consistent" authoring public agreementReprint Please keep this sentence: Business Domain-this blog focuses on Agile development and mobile and IoT device research: Data visualization, Golang, HTML5, WEBGL, three. JS, Otherwise, from this blog article refused to reprint or reprint, thank you for your cooperation. I was just beginning to learn, a lot of things are definitely wrong and please fo

Stacks and queues stack and queueStacks (Stack):The stack is also a special linear table, which is a last-in, first-out (LIFO) structure.A stack is a linear table that restricts insert and delete operations only at the end of the table, and the footer is called the top of the stack, and the table header is called the bottom of the stack (bottom).The physical storage of stacks can use sequential storage structures, or they can use chained storage structures.Queuing (queue):A queue is a linear tab

Copyright NOTICE: This article for Bo Master original article, without Bo Master permission not reproduced. HTML5+CSS3 app development Imitation 51 car

concealmentParameters:CM:BASE64 encoded commandsCN: The name of the cookie header used by the server to return dataCP: Return information delimiter1. Generate server-sideWenacoo-g-O a.php# # Server root directory uploaded to Metaspolitable using SCPMove webacoo.php to the Web root directory2. Connect using the ClientWEBACOO-T-U http://1.1.1.1/a.php# #抓包分析如何通过cookie头传指令, manually trigger traffic "CM/CN/CP"Other parametersWebacoo-hweevely　　"Using HTTP headers for instruction (encoded) transmissio

;float:none; "/>Cinder-scheduler sending MessagesCinder-scheduler send a message to Cinder-volume, let it create volume source/opt/stack/cinder/cinder/scheduler/filter_scheduler.py, method for Schedule_create_volume.650) this.width=650; "Title=" http://7xo6kd.com1.z0.glb.clouddn.com/ Upload-ueditor-image-20160623-1466685098724062746.png "src=" http://7xo6kd.com1.z0.glb.clouddn.com/ Upload-ueditor-image-20160623-1466685216794088544.jpg "style=" border:0px;white-space:normal;float:none; "/>In the

the enthusiasm for ascension. I am for everyone, everyone also for me to share the spirit of learning, the same in51colleges are being promoted. Everyone is so active and so enthusiastic. Not small51The college's little partner is to make friends. WuyiCollege recommendation:I as A and51The College has been together for three years of friends, today also want to wish rich51Happy Birthday to the college. In the days to come, I will be more supportive51every activity of the college. I will be acti

Keil and MDK coexist, follow these steps:1 Install Keil C51 First, install directory to: "D:\Keil51" (I was installed on the D drive)2 Reinstall RealView MDK, directory: "D:\Keilarm"3 Copy the C51 folder under Keil51 to Keilarm4 Copy and paste all the files under Keil51 under UV4 (or UV3) to the UV4 folder under Keilarm, note that if promptedDuplicate files, whether overwritten, are selected No, that is, do not overwrite.5 Copy the contents of the Tools.ini file under Keil51, paste it into the t