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
Public Class Cell{ Bool Flags = False ; Int Result = 0 ; Public Void Write ( Int N){ Lock ( This ){If (Flags){ Try {Monitor. Wait ( This );} Catch (Threadstartexception E){Console. writeline (E );}}Result = N;Console. writeline ( " Write: {0} " , Result );Flags = True ;Monitor. Pulse ( This );}} Public Int Read (){ Lock ( This ){ If (! Flags){ Try {Monitor. Wait ( This );} Catch (Threadstartexception E){Console. writeline (E );}}Console. writel
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 Object Access to avoid deadlocks and maintain data consis
on the length of the optical cable to display the test curve in the middle of the screen as much as possible so that the reading can be accurate, the error is small.
2) Select the appropriate pulse width: OTDR can select the optical pulse width parameter injected into the tested optical fiber. In the case of the same amplitude, the energy of the wide pulse must
to the interference of signals sent by devices on the same side of the cable to receive signals on other lines.
The near-end crosstalk indicators of the user cables that activate the ADSL service in each frequency in the ADSL band should be less than-40 dB. The maximum number of users of cables with poor near-end crosstalk indicators is small.
8. Remote crosstalk FEXT)
Remote crosstalk mainly refers to the interference of signals sent by devices at both ends of the cable to receive signals on
connection point.
In order to test the accuracy, the pulse size and width of the OTDR tester should be appropriately selected and set according to the index of refractive index n given by the manufacturer. When determining the fault point, if the optical cable length is unknown in advance, you can first put it in the automatic OTDR, find the general location of the fault point, and then put it in the advanced OTDR. Select a smaller
Master);§miso; Somi:master Input, Slave output (output from Slave);§ss:slave Select (Active low, Outputfrom master).The SPI is a [ single-Master device (Single-master)] communication protocol, which means that only one central device in the bus can initiate communication. when the SPI master device wants to read/write [slave device], it first pulls down [from the device] corresponding to the SS line (the SS is active low), and then began to send the work pu
1. Displacement output function (8-bit)When the value data is entered, the Arduino automatically assigns the data movement to 8 parallel outputs. Where Datapin is the pin number of the connection DS, Clockpin is the pin number of the connection SH_CP, the Bitorder is to set the data displacement order, respectively, high-first-entry msbfirst or low-first-in Lsbfirst. //*********************************************************************************************//function name: void Shiftout (uin
Spot-by-point comparison is one of the simplest and most straightforward methods in the reference pulse interpolation algorithm.Simple, rough, fast!Linear interpolation, circular interpolation and other interpolation, such as oval, can be achieved.By point of comparison method, as the name implies, is every step to the processing point of the instantaneous coordinates with the specified graphics trajectory comparison, judge its deviation, and then dec
practice often take both balance.Before adding the clock cycle, it is necessary to have a reasonable estimate of the expected clock cycle of the circuit, so as not to attach too loose or too tight periodic constraints, too loose constraints can not meet the performance requirements, too tight constraints will increase the difficulty of layout and cabling, the results of the implementation is not necessarily ideal. The common engineering strategy is that the time limit of the additional clock pe
On the Internet to see the data found that most of the use of CNT (counting instructions) to do the speed, found that the instruction count of the rate of time (or the number of acquisition times) requirements are relatively high and need to write reset signal time program, the error is relatively large, and real-time display speed effect is not good.The formula for calculating the speed of the CNT instruction: rotational speed = 60/Time point x number of countsThe reason for the error amplifica
See a lot of pins can be configured as Eventout, just have a pin to output a high-level pulse, tested a bit:Environment: stm32f407, IAR 7.4, STM32CUBEF4Gpio Configuration Code:Gpio_initstruct.pin = gpio_pin_10;Gpio_initstruct.mode = gpio_mode_af_pp;Gpio_initstruct.pull = Gpio_pulldown;Gpio_initstruct.speed = Gpio_speed_high;Gpio_initstruct.alternate = Gpio_af15_eventout;Hal_gpio_init (Gpiob, gpio_initstruct);Pulse
NEC protocol for infrared Protocol
NEC protocol carrier: 38 khz
The representation of logic 1 and logic 0:
The logic 1 is 2.25 ms, the pulse time is 1.12 us, the logic 0 is ms, and the pulse time is us. Therefore, we decode the time based on the pulse length. The recommended carrier duty cycle is 1/3 to 1/4.
NEC protocol format:
The first sending is a 9 ms High
(192.168.60.200:80) (Weight set to 1)LDIRECTORD|2563] Deleted fallback server:127.0.0.1:80 (192.168.60.200:80)LDIRECTORD|2563] Added Real server:192.168.60.144:80 (192.168.60.200:80) (Weight set to 1)As can be seen from the log, Ldirectord first loaded a virtual IP 80 port, then loaded two real server node 80 port and the Director server Native 80 port, while the real server two node weight is set to 1, Since two nodes are available, the 80 port of the director server native is finally removed
wait () method for the 5.6.6 Monitor class, the Pulse () method, and the PulseAll () methodThe Wait (), Pulse () and PulseAll () methods must be used together and need to be combined with a small scene to be correctly understood. Our idea is this: a thread obtains exclusive access to an object, and it decides to wait (by calling wait ()) until the object's state changes. To do this, the thread must tempora
Cj...... Junction capacitance Junction Capacitor
Ηv ... Rectification Efficiency rectification Efficiency
I (AV) ... Average Forward Rectified current forward average rectified currents
IBO ... Breakover Current transition Currents
Id...... Stand-off Reverse Leakage Current off-state reverse leakage currents
IF ... DC Forward current forward DC currents
Ifm...... Maximum DC Forward Current Max forward DC currents
IFSM ... Peak Forward surge current forward surge peak currents
Ifrm ... Repetitive
Memory in the computer's importance and position second only to the CPU, the quality of its advantages and disadvantages of computer performance has a vital impact. In order to maximize the potential of memory, you must adjust the memory-related parameters in the BIOS setup, this article mainly introduces the parameters of the commonly used BIOS settings.
1. SDRAM Ras-to-cas Delay (delay time of memory line address transmission to column address)
Available options: 2, 3.
This parameter can c
high, the working time is long, will also natural aging, resulting in sensitivity to become worse. At this point, only the replacement model of the same light-emitting tube or photosensitive tube.
Lens
Second, the photoelectric receiver system offset, the focal length is not aligned. Optical Mouse is the use of internal two pairs of photoelectric detectors perpendicular to each other, with the photoelectric board to work. The light emitted from the light-emitting diode shines on the photoelec
Pulse width modulation (PWM) is the abbreviation of English "Pulse width modulation", referred to as pulse width modulation.
It is a very effective technology to control analog circuits by using digital output of microprocessor, which is widely used in many fields such as measurement, communication, power control and transformation. A simulation control mode, ac
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