time delay function

  The delay program is widely used in SCM programming, but some readers do not know how to program the time delay programs in the study, and do not know the machine The difference between the period and the instruction period, do not know the

Transferred from: http://blog.sina.com.cn/s/blog_980e19e00101b5dh.htmlSometimes precise delay is required, such as the 18B20 temperature sensor is very strict in timing requirements and must be accurate to the microsecond levelFirst, with the NOP

Original: Http://wzw19191.blog.sohu.com/135110823.html The concept of propagation delay refers to the transmission of electromagnetic signals or optical signals in the transmission medium delay, and in the optical fiber or copper wire, the optical

$.when's description　　Description: Provides a way to execute a callback function for one or more objects that returns a delay (Deferred) object for those objects.Description (combined with examples and source code):If you do not pass any arguments ,

Grouping starts from a single host (source), transmits through a series of routers, and ends its journey in another host (destination). When grouping from a node (host or router) along this path to a successor node (host or router), the packet

One, what is deferred environment variable extension? Delay variable Full name "Delay environment variable extension", to understand this thing, we have to understand what is called variable expansion!When we explain our command, CMD will first

First, we'll introduce the jquery data () function The data () function in jquery is used to append data to a selected element, or to obtain data from a selected element. Data that is accessed through the data () function is temporary, and once the

When writing application-level programs, sometimes you need to delay, what should I do?In the kernel code, we often see such a header file using # include , and thought of calling this directly is OK! But at the time of compiling, we found thatThe

Measure time Difference The kernel tracks the time stream with timer interrupts Clock interrupts are generated at periodic intervals by the system's timing hardware, which is set by the kernel according to the Hz value, which is defined

The second way to address the CPU usage of the delay function in the previous section (up to 50%) is to use the message mechanism to wait for messages or timeouts through API functions MsgWaitForMultipleObjects, thus avoiding the use of cyclic