I use 51 to control 8253 for counting, chip select connects to P24, A1A0 connects to P00P01 through 373, the following is my bus method #define cnt0_8253 XBYTE[0xe0f0] #define cnt1_8253 XBYTE[0xe0f1] ...
I see two circuit diagrams (if the circuit diagram is not clear, please double-click to enlarge it). I don't understand it. Please give me some advice on Figure 1: 1 ) Do R1 and C1 act as a low-pass f...
The calculation method of LPC1114 SysTick delay time is as followsI used this delay to make an LED flashing example, and now I share it with you. Below is the source code, and the project file is in t...
我做了一个抢答器程序,但是仿真没波形能给点建议吗QQ:362372925谢了library ieee;use ieee.std_logic_1164.all;use ieee.std_logic_unsigned.all;entity qiang isport(reset,clk: in std_logic; k: in std_logic; i: in std_logic_vector(7 do...
I can't install the USB driver of progisp167 on my computer (desktop). Why? I downloaded it from www.zhifengsoft.com. After unzipping it, whether I directly right-click usbprog.inf to install it or in...
Do you often have to add brake fluid to your car's brakes? The fact that you need to pump out the brake fluid to make sure there is no gas in the brake fluid line may not be done by the car owner h...[Details]
For a long time, due to the limitation of hardware conditions, the display devices of traditional small handheld devices such as PDA are usually monochrome LCD, and the user interface is very simpl...[Details]
5. Identifiers and keywords of C language
A complete PIC microcontroller C language program usually consists of six parts: include files (i.e. header files 1, variable definitions, variable de...[Details]
1 Introduction
There have been many studies on the detection and protection of power grid short circuit and line fault. The short circuit, overload and overvoltage protectors on the market have ...[Details]
Single-chip microcomputers are widely used because of their small size, powerful functions and low price. This article introduces the method of designing a micro electronic piano using the AT89C51 sin...[Details]
Continuity test
A variety of devices need to be checked for continuity, including cable assemblies, printed circuit boards, and connectors to ensure that these components have the expected contin...[Details]
Abstract: With the development and construction of BeiDou II system, China will shift from the situation dominated by GPS to the situation dominated by BeiDou II global navigation system independen...[Details]
Abstract: In recent years, with the establishment and grid-connected power generation of a large number of solar photovoltaic power stations at home and abroad, photovoltaic grid-connected inverter...[Details]
introduction
At present, measuring instruments are developing towards networking, and each individual embedded instrument will become a node on the Internet. This system realizes the network...[Details]
1 Introduction
Ultrasound refers to elastic vibration with a frequency higher than the audible frequency limit (i.e., in the frequency band above 20 kHz). The propagation process of this vib...[Details]
With the rapid development of the national economy, lifting and hoisting operations are used more and more frequently and widely in various fields of economic construction. China has continuously expl...[Details]
Abstract: In order to realize wireless automatic alarm and monitoring of major safety places, based on the basic principle of pyroelectric infrared sensing, a detector for receiving infrared radia...[Details]
The future energy storage hotspot is not coal or iron ore, but lithium. This lightest metal in nature may be the heaviest resource in the future energy landscape. China launched an ambitious electr...[Details]
Based on the actual situation, a remote intelligent anti-theft alarm device for home use, connected to the telephone line, simple to operate, and stable and reliable in operation is designed. When ...[Details]
IntroductionLED
billboards are a kind of information display terminal for the public, which has a wide range of civil and commercial values. However, the information displayed on most LED bil...[Details]
LED Zone
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