ptp clock

clock_t clock (void);Calculates the processor time used by the calling processHead file is Return ValueClock returns the number of clock ticks of elapsed processor time. The returned valueis the product of the amount of has elapsed since the start of a process andThe value of the CLOCKS_PER_SEC constant. If The amount of elapsed isUnavailable, the function returns–1, cast as a clock_t.RemarksThe

Tips: 1. Mobile network to ensure a good state, if due to network status difficult to calculate your exact location, then no matter where you are, the alarm clock will ring when the time arrives. 2. The position alarm range is about 1 kilometers, the mobile phone is positioned within 1 kilometers, the alarm clock will ring. For example: When you are in the company, you need a daily alarm

RTC is a computer built hardware time, the implementation of this instruction can display the moment, adjust the time of the hardware clock, the system time to the hardware clock and the time of the same, or the system time back to the hardware clock. Grammar Clock [--adjust][--debug][--directisa][--getepoch][--hctos

Design for portability-Clock Domain crossings when a signal goes from one clock domain into an other we have what is called a clock domain crossing. to avoid metastability related problems all these Signal paths must be designed with care. problems related to clock domain crossing are seldom observed during simulation

For the MCU to arm of the students, the RTC may be less contact. Referring to the real-time clock, more often think of is DS1302. Of course, in the STM32, a CPU is enough, do not need to DS1302.In fact, RTC is just a timer, all the information is lost after power-down, so we need to find a place to store this information, so we find the backup register. Because it can still be powered by a button battery after power-down, this data can be saved at all

Bit: in a binary system, each 0 or 1 is a bit, which is the minimum unit of memory. Word Length: in computer technology, the number of digits of the binary number that the CPU can process at a time in a unit of time (at the same time) is called the word length. Therefore, an 8-bit CPU can process 8-bit data. Similarly, a 32-bit CPU can process 32-bit binary data per unit time. Bytes are the data volume units in the computer.In a computer, data only uses 0 and 1. (here, only one data point is

in the STM32 if the external crystal is not used, osc_in and the Osc_out the method of connectionIf using an internal RC oscillator without an external crystal, proceed as follows:1) for 100 feet or 144 feet of products, osc_in should be grounded, osc_out should be suspended.2) for products with less than 100 feet, there are 2 kinds of mating methods:2.1) Osc_in and Osc_out are grounded by 10K resistors respectively. This approach can improve EMC performance.2.2) Remap osc_in and osc_out to PD0

Transferred from: http://blog.chinaunix.net/uid-27105712-id-5612512.htmlFirst, the use of the backgroundLet's start with a scene that requires a vector clock . When we write data, we often want the data not to be stored at a single point. such as DB1,DB2 can provide write service at the same time, and all have the full amount of data. The client does not have to worry about data-scrambling, regardless of which DB is written. But in real-world scenario

Example:http://blog.csdn.net/kvw3000This article collects and collates, thanks each section code provider! Finishing: Go home and Chant (Wang Jitai) 1. Announcements and Counters2. Weather forecast3. The firefly following the mouse4. Status bar text5. Follow the mouse text6. Automatically displays a different maxim at the top subtitle position each time it is opened7. Flash exquisite clock (add) The appropriate functionality can be achieved by addi

Human clocks hone Hone clock absrtact: This article introduces an interesting flash clock designed by Japanese: human clock hone hone. Installation is simple, direct JS import, including two styles: transparent background and white background. Added a funny human clock to the blog hone Hone

Zookeeper has been tuned for a long time and found that the migration of uboot 2014.1 from 2410 to 2440 is always unavailable. It seems that the program is always running, and hang is in the place where the clock is set, therefore, it is necessary to carefully read the sections on clock and power management. Let's talk about the hardware configuration, 12 MHz crystal oscillator, we mentioned above the SDRAM

Chrony is an open source free software that keeps the system clock synchronized with the clock server (NTP) to keep time accurate.It consists of two programs: Chronyd and CHRONYC.Chronyd is a daemon that runs in the background to tune the system clock and clock server synchronization running in the kernel. It determine

5502 there are four clock groups: C55x subsystem clock group Fast peripherals clock group Slow peripherals clock group External memory interface clock group 1. c55x subsystem clock group the

In this article, readers will learn some basic design methods and the use of time objects, as well as some of the basic syntax. This alarm clock has the function of displaying time, date, week, hour, clock alarm, etc. Effect Preview Chart: Click here to download Source Files Design steps: First, design clock plate 1. Design

Clock animations are also widely used in Web applications, and in some personal blogs we often see some fairly personalized HTML5 clock animations. Today we share with you 14 models of ultra-fashionable HTML5 clock animation, including disk clock, 3D clock, personalized