The NC command in Linux is a powerful network tool, the full name is Netcat.Grammar:NC [-hlnruz][-gParameter description:-gA few simple examples:1. Scan the specified port[[email protected] ~]# nc-v-W 5-z 192.168.233.129 8003Connection to 192.168.233.129 8003 Port [Tcp/mcreport] succeeded!2. scan the specified port range[[email protected] ~]# nc-v-W 5-z 192.168.233.129 8000-8005Nc:connect to 192.168.233.129 Port 8000 (TCP) Failed:connection refusedConnection to 192.168.233.129 8001 Port [Tcp/
With the demand for ultra-large capacity and ultra-high speed network transmission, it is only a matter of time that the MHz bandwidth cannot fully meet people's needs. As a result, seven types of Integrated cabling systems have been selected, and their bandwidth can be up to 600MZ. However, considering various practical problems, seven types of systems have not been widely used. Is it too early to apply seven types of systems? What is the reason?
Based on the above problems, today,
the time domain reflection technology of the test instrument. Based on the location of the short-circuit point, determine whether the problem occurs at the connection point or between the cable to quickly troubleshoot the fault.
1.3 cross: this problem is generally caused by negligence during cabling. This situation is easy to appear in some brands of cables, because the core and secondary colors of these cables are usually pure white, during construction, it is easy to mix the positions of the
-pull output), and The comport is connected to the output voltage of 5 V.
For the above circuit test (Power = 5.0 V ):
3.3 V for input and 0.6 V for output
Input 0 V and output 5.0 V
Input is not connected, output is 5.0 V
Therefore, ULN2003/2803 can also be used for level conversion. Why? What is the relationship between ULN2803/2003 and the transistor? Its internal implementation is two transistors.
Its structure has three features:
Output Collector leakage, so you can connect your o
Works folder created with the operating system does not have an Modelsim se automatically generated _info file. vmap work work (corresponding to the emulation step ①: The purpose of this command is to map the current logical working-Library works to the actual work-Library works mapping. You can also directly use the instruction "Vmap work" to indicate that you are mapping to the current working directory. vlog counter.v counter_tb.v (corresponding to the simulation step ②③: Compiling co
Quit-Sim Set PATH1 C:/modeltech64_10.2c/xilinx144_libset PATH2 C:/xilinx1/vivado/2014.4/data/verilog/srcvlib Work #vmap work $PATH 1/Secureip #vmap work $PATH 1/UniSIM #vmap work $PATH 1/unimacro #vmap work $PATH 1/unifast #vmap work $PATH 1/unisims_ver #vmap work $PATH 1/unimacro_ver #vmap work $PATH 1/unifast_ver vmap work $PATH 1/simprims_ver vlog $PATH 2/*. V vlog-work work-f verilog.f vcom-work work-f vhdl.f vsim-novopt work.sim_tb_top run 10000n
text editor. I used the sourceinsight to open as shown. which '; ' is the annotation function, find the [Library] option and start copying from SECUREIP. STEP2: Copy until [vcom] as shown. STEP3: Find D:\modeltech_10.0c under Modelsim.ini file, right click à select Properties à remove read-only attribute. The author's habit is to make a backup of the files before changing them, to prevent them from recovering after the error. Open with a text edito
step of the interface, not surprisingly, this is no problem, Then the operation can be done)Sixth step: Mobile phone off, take off the battery, then installed, and then what buttons do not press, directly plug in the phone to the computer above, the Device Manager will pop up a "yellow mt65xx driver", if there is no automatic popup seventh step of the interface, you must quickly right click "Update Driver", if you are not fast enough , the yellow drive disappears, do not tense, the mobile phone
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