networked on the bus to achieve multi-machine communication, the bus allows to hang a plurality of transceivers, from the existing RS485 chip, can be hung 32, 64, 128, 256 and other devices of different drives. The interface of the RS485 is very simple, similar to the MAX232 used by RS232, only requires a RS485 converter, it can be directly connected with the UART serial port, and the use of the same asynchronous serial communication protocol. However, since RS485 is a differential communicatio
Gpbcon is used to set the input and output attributes. That is to say, do you want to control LEDs? Now you know that the LED pins are gpb0 and gpb1, and gpbcon controls the attributes of these pins, so now we need to set the attributes of these pins to output to control its flickering. So how to set it? Our pins are g
, that is to say, the data, status, and control register read/write access port signal. This article uses some common naming rules. The eight data bits are D0 ~ D7, five status bits are S3 ~ S7, the four controls are C0 ~ C3. A letter indicates the port register, and a number indicates the bit of the signal in the register.
Data Register
Data port or data register (D0 ~ D7) stores one byte of information written to the data output port. Data can be written or read from the data port (data can be
and can be abstracted and moved to the abstract factory role to be declared. ExampleScenario IssuesA common example of life-assembling a computer, when we assemble a computer, we usually need to select a range of accessories, such as CPU, hard disk, memory, motherboard, power supply, chassis, etc. To discuss the use of simple points, only consider selecting the CPU and motherboard issues.In fact, when choosing the CPU, faced with a series of problems, such as brand, model, number of
number of elements in all the dimensions of the array, that is, the number of elements in the array, commonly used to limit the size of the array subscript 2. Common methods 2.1 Copying of arrays In C #, the replication of an array is generally divided into the following three types:int[] Pins = {3,9,7,2};int[] Copy1 =New int[Pins. Length]; pins.
int [] pins;int [,] items = new int [4,6];//Initializes a two-dimensional array of length 6 width 4items[4,6] = 99;//assigns a value to i=4,j=6 position 99There is no limit to the number of array dimensions, but be careful with memoryTime [] times;An array element can also be a struct, enumeration, or class.It is best to take a plural name for an array variablevar names = new[]{"John", "Diana", "James", "Francesca"};Length is the property of the array
A common example of life-assembling a computer, when we assemble a computer, we usually need to select a range of accessories, such as CPU, hard disk, memory, motherboard, power supply, chassis, etc. To discuss the use of simple points, only consider selecting the CPU and motherboard issues.In fact, when choosing the CPU, faced with a series of problems, such as brand, model, number of pins, frequency, and so on, only to identify these problems, to de
Many Ford and Mazda models (approximately since 2003-2004) is equipped with MS CAN bus, in addition to the regular HS CAN Bus. In contrast to HS can bus, MS can bus isn't supported by the stock ELM327, because Ms can is a manufacturer-specific solu tion and located on non-obd2 pins. However, ELM327 is very flexible tool, and small modification allows to implement the MS CAN support.Note before you read further:since version 2.1.0 Forscan supports the
code:3.2 Layer3.2.1 Tile LayerYou can choose the tile provider you need, but it is recommended to use Mapbox (looks pretty).3.2.2 WMS Layer3.2.3 TMS LayerLeaflet does not have explicit support for TMS services, but the tile structure is the same as the general L.tilelayer organization model, so the rendering of TMS services is almost less cumbersome.3.2.4 Access
notifies the operating system through interruption. In this way, multiple unfinished tasks can exist simultaneously in the system.
No matter what the CPU is doing, some necessary hardware support must be provided to interrupt the device. Almost all general-purpose processors such as alpha AXP use an approximate method. Some physical pins of the CPU are designed to change the voltage (for example, from + 5 V to-5 V), causing the CPU to stop the curr
packaging technology of RAM.
SRAM Chip:
Early SRAM chips used 20-line dual-row (dip:dual Inline Package) encapsulation technology, they have so many pins because they have to: each address signal requires a signal line; a data input line and a data output line part of the control line (Write Enable, Chip Select); line and power cable
The image above shows the SRAM chip, but not the SRAM chip in the schematic below, the following is a 16K x 1-bit SR
As a beginner, We need to assemble a computer that can be used. The first problem we need to solve is how to smoothly connect many computer accessories and connections? To complete this task, you must have a deep understanding of various connections inside and outside the computer. I will divide these connections into three parts for you to explain.
External host connection
The connection outside the host is simple, but we need to find out which interface is used for accessories and functions. F
Ⅰ: ErrorReporting bug reportA:violations associated with buses various types of bus electrical errors (total )Bus indices out of Range Bus Branch index out of scopeBus range Syntax errors for syntax errorsillegal bus range values illegal bus definitions defined by illegal bus is illegalmismatched bus label ordering Bus branch network designator wrong sortmismatched Bus/wire object on Wire/bus bus / wire mismatchmismatched buses widths bus width errormismatched bus section index ordering Bus ra
Transfer from http://www.cnblogs.com/java-my-life/archive/2012/03/28/2418836.htmlScenario IssuesA common example of life-assembling a computer, when we assemble a computer, we usually need to select a range of accessories, such as CPU, hard disk, memory, motherboard, power supply, chassis, etc. To discuss the use of simple points, only consider selecting the CPU and motherboard issues.In fact, when choosing the CPU, faced with a series of problems, such as brand, model, number of
this step. ClickNext, The window shown in Figure 5 appears.
Figure 4 task display
Figure 5 create a new project
2. Select a jobCompositionFolder introtutorial, you can also use your own folder. The project must have a name, which is usually the same as the name of the top-level design entity. 5. Select light as the project name and top-level entity name. ClickNext. Because the introtutorial folder has not been created, Quartus II displays a dialog box asking if you want to c
1. Found clock-sensitive change during active clock edge at time on register ""Cause: the clock-sensitive signals in the vector source file (such as data, allowed ends, zeroes, and synchronous loading) change at the same time at the clock edge. however, sensitive clock signals cannot change at the clock edge. the result is that the result is incorrect.Measure: edit the vector source file.2. maid at: Truncated with size to Match Size of target (Cause: In the HDL design, the number of digits of th
Quartus.
Measure: ignore it and avoid affecting usage.
4. Warning (10240): Maid (153): inferring latch (es) for variable "lut_data ", which holds its previous value in one or more paths through the always construct
Explanation: signals are integrated into latch. There is a competition between the latch en and the data input port.
Measure: extract the counter from it.
5. Warning: 12 hierarchies have connectivity warnings-see the connectivity checks report folder
Explanation: some port
Mobile High-definition Link (MHL) HD AV standard interface, is a portable consumer electronics device to connect the audio-visual standard interface, MHL only use a signal cable, through the standard HDMI input interface can be presented on high-definition television. It uses the existing Micro USB interface, whether mobile phones, digital cameras, digital cameras and portable multimedia players, can be the full media content directly to the television and not damage the film's high resolution e
Mobile High-definition Link (MHL) HD AV standard interface, is a portable consumer electronics device to connect the audio-visual standard interface, MHL only use a signal cable, through the standard HDMI input interface can be presented on high-definition television. It uses the existing Micro USB interface, whether mobile phones, digital cameras, digital cameras and portable multimedia players, can be the full media content directly to the television and not damage the film's high resolution e
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