I. Summary
This blog post combines video collection, compression, bus switching, and UDP data transmission to develop a UDP-Based Network Camera. The following describes the specific development process. For the debugging process of some key issues, see the next blog.
Ii. Experimental Platform
Hardware Platform: diy_de2
Software Platform: Quartus II 9.0 + NiO II 9.0 + Visual Studio 2008
Iii. Experiment Principles
1. Overall system diagram
Figure 1 overall system diagram
The experience sharing activity of the tianembedded Development Board ushered in the first article. After review, it was approved to meet the requirements. Next, let's share it.
I am a newbie. I can only implement the functions simply. The following is a simple function of the development manual. I operate it according to it, and I will do it right away. In fact, development manuals are comprehensive. After researching the development manuals, you will not be asked questions about idiots, whi
This section describes several common features:
Hvga (half-size VGA)That is, half of VGA (640*480), resolution (480*320), (Aspect Ratio ).
QvgaThat is, "quartervga ". The size of VGA is 1/4, that is, the resolution output on the LCD is 240x320 pixels.
WqvgaFull name: wide quarter video graphics ArrayA digital product screen resolution, representing a screen re
Author: gooogleman@foxmail.com
I slept a lot today, so I started debugging with sate210 with VGA work control board tonight, because I saw that the P clock and parameter standards were not very high, so I thought, the maximum LCD pixel clock of s5pv210 is 166 m, so it fully meets the 1080 p 1920*1080 resolution requirements. So I filled in the parameters according to the standard and modified the related clock PARAMETERS OF THE sate210 wince system, O
Tags:Android development image resolution drawablehdpimdpildpiit
Category: Unix/Linux
1. Differences between drawable-(hdpi, mdpi, ldpi)DPI is the abbreviation of "dot Per Inch". The number of dots per inch.Four density classifications: ldpi (low), mdpi (medium), hdpi (high), and xhdpi (extrahigh)Normal screen: ldpi is 120, mdpi is 160, hdpi is 240, and xhdpi is 320.
2. Differences between WVGA, hvga, and qvgaVGA is the "video graphics array", and the display standard is 640*480.W
Automatic scanning read/write distance 4 W transmitting antenna unidirectional ≥ 1.3 m, omnidirectional ≥ 0.9m antenna connector 50Ω SMA Communication Interface RS/232, VGA, DI power warning light, DC12V; Control System and LCD, DC24V, 1A warning light source over-Bright Light Emitting Diode Communication Interface RS232, VGA, USB, RJ45, DI, DO power supply 220 V, AC single board control module operating s
/inittabFile, and the running level in Ubuntu is also different from the traditional RedHat Linux. In Ubuntu, the running level 2 \ 3 \ 4 \ 5 enters the graphic interface. Don't ask me how I know it. I will talk about it later.
Let's talk about how to enable FrameBuffer and set the FrameBuffer resolution. The network method has long expired. To enable FrameBuffer on the network, you need to modify it first./etc/modprobe.dTo load the vesafb kernel module, you also need to modify Grub to pass
). It is equipped with a 13.3 Inch "wxga" mirror highlighted magnificent screen with a resolution of 1280x800.
Front and back of the machine
Left and right of the machine
Shenzhou q310y provides the following body interfaces: 3 USB2.0 interface, s terminal, ieee1394 interface, 1 PCMCIA expansion card slot, VGA port, headphone interface, microphone interface, DC power connector, travel battery connector, RJ-45 interfa
indicator of all display devices, LED display as a display device is no exception, below we have a brief explanation of the common interface:VGA input interface: The VGA interface uses the asymmetric distribution 15pin connection method, its working principle: is the video memory inside the digital format storage image (frame) signal in the RAMDAC to simulate the high frequency signal, then the output to the plasma imaging, so the
line to transmit signals. The interface is a four-pin interface. In the interface, the two pins are grounded, and the other two pins transmit the brightness and color signals respectively. Because the brightness and color signals are sent separately, the effect of the S terminal is better than that of the composite video. However, the anti-interference capability of the S terminal is weak, so the length of the S terminal line should not exceed 7 meters. 4 chromatic aberrationThe color differen
Differences between drawable-hdpi, drawable-mdpi, and drawable-ldpi: In Versions later than Android2.1, there will be three directories: drawable-mdpi, drawable-ldpi, and drawable-hdpi, these three directories are mainly used to support multi-resolution. Dpi is the abbreviation of "dot per inch". The number of dots per inch. Four types of density classification: ldpi (low), mdpi (medium), hdpi (high), and xhdpi (extra high) General screen: ldpi is 120, mdpi is 160, hdpi is 240, and xhdpi is 320.
After querying to the system service being executed, you can then add the service name to the Dumpsys and view the specified service information.ADB shell Dumpsys ActivityADB Shell Dumpsys Cpuinfoadb shell Dumpsys Batteryadb Shell Dumpsys window (the last part can see the resolution information) =====-------------------------------------------------Android developers about DP documentation I've seen n times, the conversion formula for PX and DP I remember very well: px = DP * (dpi/160) , the ori
Failure phenomenon:
YOGA4 Pro (YOGA900 ISK) adopts the Type-c interface instead of the mini HDMI interface of the product, and needs to purchase TYPE-C wiring separately in the environment where the projection is needed.
Solution:
For type-c wiring, the specific models available for the L2 test are as follows:
VGA Cable:
Apple (AAPL) mj1l2fe/a USB type-c VGA multiport Adapter
Green Union (Ugreen) 4027
set/unset at run timeThrough SYSFSChoicePrompt "LCD Select"Depends on fb_s3c2410HelpS3c24x0 LCD SizeselectConfig fb_s3c2410_t240320Boolean "3.5 inch 240X320 Toppoly LCD"Depends on fb_s3c2410Help3.5 inch 240X320 TOPPOLYLCDConfig fb_s3c2410_n240320Boolean "3.5 inch 240X320 NEC LCD"Depends on fb_s3c2410Help3.5 inch 240x320 NECLCDConfig fb_s3c2410_tft640480Boolean "8 inch 640x480 L80 LCD"Depends on fb_s3c2410Help8 inch 640X480LCDConfig fb_s3c2410_tft800480Boolean "7 inch 800x480 TFT LCD"Depends on
Open Terminal inputXrandrGet the following informationScreen 0:minimum 2390 x 768, maximum 8192 x 8192LVDS connected primary 1366x768+1024+0 (normal verted right x axis y axis) 309mm x 174mm 1366x768 60.0*+ 1280x720 59.9 1152x768 59.8 1024x768 59.9 800x600 59.9 848x480 59.7 720x480 59.7 640x480 59.4 HDMI-0 disconnected (normal left inverted right x axis y axis) VGA-0 conn
How Ubuntu uses commands to adjust screen brightnesstime: 2015-01-13 18:03http://www.xitongzhijia.netQipengWe all know that the brightness of the screen can be adjusted using the Monitor's buttons, but you know what? Ubuntu system can use the command to adjust the screen brightness, today's small series to introduce you under Ubuntu using the command to adjust the screen brightness method, together to learn the next. User issues: Ubantu 12.04 General Open the opportunity to adjust the brightnes
Why do you use the HDMI cable to connect the computer to the TV?
Because now the LCD TV basically has a VGA interface, so you can easily use the VGA cable to achieve the computer connected to the TV, but there is a place in the article is not mentioned, that is the resolution of the problem, now the mainstream LCD TV panel is already full HD panel (1920X1080), but unfortunately, A lot of TV (especially s
The content source of this page is from Internet, which doesn't represent Alibaba Cloud's opinion;
products and services mentioned on that page don't have any relationship with Alibaba Cloud. If the
content of the page makes you feel confusing, please write us an email, we will handle the problem
within 5 days after receiving your email.
If you find any instances of plagiarism from the community, please send an email to:
info-contact@alibabacloud.com
and provide relevant evidence. A staff member will contact you within 5 working days.