Linux provides two system calls to support file length truncation, namely: #include
#includeint ftruncate(int fd,off_t len);
和:
#include#include
int truncate(const char *path,off_t len); Both system c...
AC servo motor control based on STSPIN32F01, using MA730's 14-bit magnetic encoder as position feedback2, cascade control of position loop + speed loop + current loop3, using SVPWM vector control algo...
[i=s] This post was last edited by iloveukulele on 2014-4-8 20:35 [/i] MSP430 G2 series LaunchPad with touch screen 45 yuan for 2 pieces (1 piece sold) Original brand new PICKIT3 200 yuan STM8L-DISCOV...
I have been using summer 09 from school to work. I feel it is quite stable, so I have been using this version. I heard that it cannot be used under 64bit, but I found that it can be installed and used...
ARM DS-5 has been updated to v5.29. Download it and try out ARM's latest development tool DS-5 v5.29. Download DS-5 v5.29 Windows 64-bit download address: [url=http://www.myir-tech.com/soft.asp?id=113...
Due to the significant increase in electronic devices in automotive and industrial applications, the automotive and industrial markets continue to play an important role in China's electronics in...[Details]
I. Introduction
Since RS232 has a short communication distance (only 15 meters according to EAT/TAI-232 standard), and can only perform point-to-point communication, it cannot directly f...[Details]
Digital array radar (DAR) uses digital beam forming (DBF) in both receiving and transmitting modes to achieve flexible distribution and reception of RF signal power in the airspace, obtain excellent t...[Details]
TC9012F is a universal CMOS large-scale integrated circuit for infrared remote control signal transmission, suitable for remote control of TV, VTR, laser player and other equipment. In the market, ...[Details]
The power consumption of a switching power supply includes fixed losses caused by parasitic resistances such as semiconductor switches, magnetic components, and wiring, as well as switching losses ...[Details]
1 Introduction
Lijia'an Yellow River Diversion Culvert is a large gravity diversion gate in the lower reaches of the Yellow River. The Yellow River Diversion Culvert is located in Lijia'an Vi...[Details]
The circuit has overcharge protection, over-discharge protection, over-current protection and short-circuit protection functions. Its working principle is analyzed as follows:
1 Normal state
...[Details]
System Introduction
The converter remote data transmission system must collect converter signals distributed in various workshops and send them to the central control room. Wuhan Iron and Stee...[Details]
We software engineers love to find the perfect solution to any problem we encounter. But oddly enough, we find that in this particular area, there is no perfect solution. Clever tricks may save som...[Details]
High-voltage switches are important control equipment in power systems and play an important role in the safe operation of power grids. The resistance of the switch conductive loop is an important tec...[Details]
High-frequency electrodeless lamp is a high-tech product that integrates electronic technology, vacuum science, power electricity, plasma science, magnetic material science and other disciplines. Elec...[Details]
The so-called constant current source is a power supply with a very stable output current, but this stability is relative, not absolutely unchanging, but its rate of change is so small that it can be ...[Details]
Sensors of all types have evolved greatly over the past few years and are much more accurate and stable than their predecessors. Sometimes, these sensors are not easy to use.
Designers of cond...[Details]
With the rapid development of wireless communication technology, electronic technology, sensor technology and micro-electric system, the research of wireless sensor network has attracted more and m...[Details]
1. Definition
UPS (Uninterruptable Power System) is a voltage-stabilized and frequency-stabilized AC power source with energy storage devices, rectifiers and inverters as the main components. ...[Details]