smartpen pulse

STM32 Timer PWM mode input capture The timers in the Stm32, in addition to the TIM6 and TIM7, have input capture capabilities for other timers. This mode is usually used in the calculation of the input signal frequency frequency, the duty ratio duty, the high and low pulse width, has the very wide use. STM32 input capture, simply means by detecting the edge signal on the TIMX_CHX, when the edge signal jumps (such as rising edge/falli

website: http://digital.ni.com/public.nsf/allkb/A7AABC612F99CB82862574F000326EA5 Questions: I used an M-series board to collect and generate digital signals, and I knew that the board did not have an onboard timing engine, so I had to use other clock sources as the hardware timing source for that board, and what options I had to have to timing the digital IO.Answer: Use the following options to implement the digital IO hardware timing for the M-series boards. Note : Do not exceed the maximum nu

Optical fiber In the erection, after the completion of the weld test work, the use of the instrument is mainly OTDR tester, with the Canadian EXFO ftb-100b portable Chinese color touch screen OTDR tester (Dynamic range of 32/31, 37.5/35, 40/38, 45/43db), you can test, The position of optical fiber breakpoint, the whole loss of optical fiber link, the loss distribution along the fiber length, the joint loss of optical fiber junction. In order to test the accuracy, the

The Programmable switch is still quite common. So I studied the comprehensive Lightning Protection Problem of the programmable switch. Here I will share it with you and hope it will be useful to you. Power Communication (Power Communication Network) is an indispensable part of modern power systems and one of the three pillars of the safe and stable operation of modern power grids, the program-controlled switch is an important part of Shaanxi Electric Power Communication Network. Once a fault occ

Program-controlled switches are still commonly used. So I have studied the comprehensive Lightning Protection Problem of the program-controlled switches. Here I will share it with you and hope it will be useful to you. Power Communication (Power Communication Network) is an indispensable part of modern power systems and one of the three pillars of the safe and stable operation of modern power grids, the program-controlled switch is an important part of Shaanxi Electric Power Communication Networ

Program-controlled switches are still commonly used, so I have studied the comprehensive Lightning Protection Problem of the program-controlled switches. Here I will share it with you and hope it will be useful to you. Power Communication (Power Communication Network) is an indispensable part of modern power systems and one of the three pillars of the safe and stable operation of modern power grids, the program-controlled switch is an important part of Shaanxi Electric Power Communication Networ

Play with the decoding of the infrared remote control today! First, understand the principle of infrared reception: The remote control is easy to use and has many functions. It has been widely used in TV sets, VCD, DVDs, air conditioners, and other household appliances. It is cheap and easy to buy in the market. If many buttons on the remote control can be decoded and used as the input of the single chip microcomputer system, the disadvantages of the conventional matrix keyboard circuit board be

contextboundobject object. This synchronization method is only used for the synchronization of Instantiation methods and domains. All objects in the same context domain share the same lock.Monitor classOnly one thread can access the specified code segment at a given time. The monitor class is very suitable for Thread Synchronization in this case. The methods in this class are static, so you do not need to instantiate this class. The following static methods provide a mechanism for synchronizing

Synchronization and each pulse sent has at least one cycle width This type of synchronization is mainly used for the synchronization of some control signals. The common method is to use two triggers in the receiving module to use the system clock for two beats, as shown in Figure 12. Note the following points for such synchronization. Figure 12 design of a synchronization device (1) In Figure 12, the synchronous circuit is actually called "o

Synchronization Methods Based on Different bit widths. 1. Single-Bit Synchronization and each pulse sent has at least one cycle width This type of synchronization is mainly used for someControl signal self-synchronization. The common method is to use the output data in the receiving module.Two triggers use the system clock for two beats., As shown in Figure 12. Note the following points for such synchronization. Figure 12Design of a single-d

constant.Negative current feedback features: the output current of the circuit tends to maintain a constant.3. Differences between source filter and passive filterPassive filter: This circuit consists of passive components R, L, and C.Active Filter: it is integrated with OP-ops and R and C, and has advantages such as no inductance, small size, and light weight.The open-loop voltage gain and input impedance of the integrated op-amp are both very high, and the output resistance is small. It also

is similar to enter (), except that it is non-blocking. If the exclusive access to the resource has been occupied by another thread, this method immediately returns a false return value. We can alsoCall the tryenter () method to block a period of time in milliseconds. Because the returned results of this method are not determined and must be in the finally clause after obtaining the exclusive accessRelease this power, so it is recommended to immediately exit the function being called when tryen

access the specified code segment at a given time. The monitor class is very suitable for Thread Synchronization in this case. The methods in this class are static, so you do not need to instantiate this class. The following static methods provide a mechanism for synchronizing Object Access to avoid deadlocks and maintain data consistency. Monitor. Enter method: Obtain the exclusive lock on the specified object. Monitor. tryenter method: attempts to obtain the exclusive lock of the specified ob

Because the chip used to participate in the computer mouse is the stm32 series, coupled with relatively tight time, we basically learn while doing the module. I encountered a lot of difficulties, but I still felt that I had learned a lot and wanted to share it with me .. Okay, let's just talk about it. Pulse Width Modulation (PWM), short for "Pulse Width Modulation, it is a very effective technology that us

; somi: Master input, slave output (output from slave ); § SS: slave select (active low, outputfrom master ). SPI is a [Single-master] communication protocol, which means that only one central device in the bus can initiate communication. When the SPI main device wants to read/write [slave device], it first lowers the SS line corresponding to the [slave device] (SS is valid for low level ), next, we start to send the working pulse to the clock line. I

. After the external request signal passes through the 3 or door, it enters the 5 depressed. This is similar to the door which acts on the 4, it is used to introduce the control of event shielding registers. The pulse generator converts a hop-to-hop signal to a single pulse and outputs other functions to the chip, From this figure, we can see that there is no difference between the interrupt and the event f

of software development, Microsoft Press, 1995), treat the daily build as the heartbeat of the project. If There's no heartbeat, the project is dead. A little less metaphorically, Michael cusumano and Richard W. Selby describe the daily build as the sync Pulse of a project (Microsoft secrets, the Free Press, 1995). Different Developers 'Code is allowed to get a little out of sync between these Pulses, but every time there's a sync

Design of wireless distributed medical care system [Date:] Source: Electronic Technology Application Author: Wu Li Zhu Yu Cai Bo [Font:Large Medium Small] 　 Multi-parameter monitor is an important equipment in clinical care. It can monitor the physiological parameters of patients, such as ECG, blood pressure, blood oxygen saturation, respiratory rate, pulse rate and temperature. Currently, portable monitors with CRT or LCD display

sensors. The accuracy of the temperature sensor is user-programmable 9, 10, 11 or 12 bits, respectively at 0.5 deg C, 0.25 deg C, 0.125 deg C and 0.0625 deg C increment. The default precision is 12 characters. So we can clearly see the relationship between the conversion digits and the conversion time. The temperature register format is as follows: Ii. Let's take a look at how to control this chip. A. Agreement: Single-bus serial communication protocol, which is slightly different from common

categories. Based on the probability score of noise, it can be divided into Gaussian noise, Riley noise, gamma noise, exponential noise and even noise. Their probability density functions (PDF) are as follows: (1), Gaussian Noise In spatial and frequency domains, Gaussian noise (also known as normal noise) models are often used in practice due to their mathematical ease of processing. The following PDF of Gaussian random variable Z is provided: Where, Z indicates the gray value, μ indi