Why do these errors occur when compiling with Keil mdk 4.12? Ads1.2 does not.S3C2440\source\2440init.s(456): error: A1516E: Bad symbol 'Image$$RO$$Base', not defined or external
S3C2440\source\2440ini...
Recently, I want to design a three-phase soft start circuit based on a single-chip microcomputer. The basic components required are:
1.IGBT tube
2. Single chip microcomputer
3. Relay
4. Motor
5. LCD d...
[font=宋体][size=3]Tomorrow is my birthday. Time flies so fast... A few days ago, I was talking with my classmates about things that happened in junior high school. It seemed like it happened yesterday,...
I have encountered some problems when porting from EVC4.2 to VS2005. I hope you can discuss and give me some advice. Same code difference: Evc4.2+wince4.2 SDK (Note: the same code can also be compiled...
Project outsourcing: Platform RK2706B --> Function: Plug into PC and map it as a USB disk. However, if the user wants to copy something to the disk, he must enter a password. It is best to have a dial...
In
circuit design,
current
measurement
is widely used, and the main fields are divided into three categories: in measurement,
the electric meter
is used to measure the curre...[Details]
System design is a complex process. It is not enough to just use ICs. There are many details to consider. This article uses a high-fidelity music playback system as an example to introduce how to s...[Details]
With the rapid development of intelligent control technology, computers and information technology, the trend of information appliances IA (Information Application), computers and communications integ...[Details]
The concept of state machine
State machine is an important concept in software programming. More important than this concept is its flexible application. In a clear and efficient program, ther...[Details]
With concerns about the growing energy crisis, motor efficiency has become an important and timely topic. This is because motors use 63% to 70% of the electricity produced in the United States and ...[Details]
This article will introduce a design method for a distributed control system used in a tracking car, which can perform distributed control of motor modules, sensor modules, and lighting control mod...[Details]
Introduction
In industrial control, speed measurement is often required. Generally, a contact tachometer is used. This tachometer must be placed against the center of the shaft to measure. It...[Details]
In the "digital pressure measurement" experimental device of applied physics, the subject technical knowledge of analog circuits, digital circuits, sensors and single-chip microcomputers is used. In o...[Details]
People who often surf the Internet until late at night, their families always complain that turning on the big lights in the living room affects their rest, but some people don't have keyboard ligh...[Details]
The power supply is the core component of a computer. Although it is not of high value, all computer components rely on the switching power adapter to provide energy, so the stability of a power su...[Details]
Energy conservation and environmental protection are the main directions of current automotive technology research, and power batteries are the key to electric vehicle technology. Research on powe...[Details]
introduction
The Steyr diesel engine produced by Weifang Diesel Engine Factory has huge power and is one of the main power models widely used in China's heavy machinery and large trucks. In ...[Details]
1 Introduction
CAN (Controller Area Network) bus is a kind of field bus. It is used in many industrial sectors due to its outstanding advantages such as high performance, high reliability, high...[Details]
Some people believe that hybrid vehicles are just a transitional product, and the ultimate goal of developing new energy vehicles is electric vehicles. Therefore, China should skip hybrid vehicles ...[Details]
0 Introduction
This paper designs a dot matrix LED text display screen that is easy to update, expandable, and low-cost. The ways to reduce costs are: ① Use the Bluetooth data transmission...[Details]