Project requirements: Use a cyclic overwrite method (record data every T microseconds, record Y seconds, and then sample and overwrite the data of the previous Y seconds in the next Y seconds), update...
My program has the following code: Call poll() function to wait for the return data of the serial port module
pfd.fd = fd; pfd.events = POLLIN; nLength = poll(pfd, 1, -1); nLength = read(fd, ans, 128)...
[color=#000]I want to ask what is wrong with my program, why it always goes wrong. I want the program to send a set of data every second, receive_Data only has 4 data, but i==6 can send out 5 data "0x...
What is a rectifier diode
Rectifier diode is a semiconductor device that can convert AC power into DC power. Rectifier diodes are widely used in various power rectifier circuits. When we choose a re...
I recently debugged a 3G network card. The driver under wince has been basically completed. The dial-up connection can also be established and it shows "connected" after dialing. However, I cannot ope...
In order to prevent traffic accidents, when the intelligent detection device of the car detects danger ahead, it must send a warning message to the driver. The voice alarm clearly reminds the drive...[Details]
This article discusses how to use an ultra-low-power RF transceiver chip from Zarlink Semiconductor for pacemakers, neurostimulators, drug pumps, and other such implantable medical devices to achiev...[Details]
Designers of hearing aids have stringent requirements. Hearing aids must be small enough to fit in or behind the ear, operate on ultra-low power, and be free of noise or distortion. To meet these requ...[Details]
JTAG Technology Introduction
One disadvantage of shrinking technology is that the complexity of testing small devices increases dramatically. When the board area is large, the board is tested...[Details]
Third generation (3G) mobile phones offer a variety of features with more functionality. As consumers enjoy the latest and better features of these communication devices, they continue to demand lo...[Details]
introduction
The most common flight state of a fixed-wing aircraft is horizontal flight. If it is allowed to fly at a large angle, the action cannot be maintained all the time. If it is al...[Details]
There are many ways to attenuate signals. The most commonly used method is to divide the voltage using resistors. The common circuits are as follows:
Oscilloscope pre-stage attenuation c...[Details]
Among the many candidate standards for China's mobile TV, the CMMB standard proposed by the Broadcasting Science Research Institute of the State Administration of Radio, Film and Television is aime...[Details]
In order to ensure the reliability of the driving assistance system and the basic functions of the car, and also to leave suitable connection interfaces for the car's future new entertainment and ...[Details]
Introduction
Wireless operators are driving demand for broadband and data rates by offering enhanced data services to increase average revenue per user (ARPU). The need to provide users with ...[Details]
Capacitive sensing user interfaces are emerging as a practical and innovative alternative to mechanical buttons in mobile phones. While capacitive sensors can be viewed as a drop-in replacement fo...[Details]
0 Introduction
One of the basic tasks of machine vision is to obtain image information from the camera and calculate the geometric information of objects in three-dimensional space, so as ...[Details]
After more than ten years of technological development and application market cultivation, biometric technology has been applied on a large scale in many application fields. As far as the Chinese m...[Details]
As mobile phones and other portable devices have more functions, there are more potential input and output (I/O) channels for electrostatic discharge (ESD) voltage to enter, including keyboards, bu...[Details]
With the development of LED technology, the application of LED has expanded from the traditional low-power portable product backlight to medium- and high-power indoor lighting, outdoor lighting, an...[Details]
ARM Technology
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