laptop with db9 serial port

Tag: Send data false Run program design RS485 file Application device nbspIntroduction of C # serial port and implementation of simple serial communication programWeekend, nothing to do, write a simple serial communication tool, also is this weekend has come, nonsense, direct to the themeIntroduction of

defines DB9 and DB25 pairs such as the following table: However, in the actual project development process, the standard serial port application has been fewer and less. Now it is almost impossible to see the serial port on the

-232, RS-422 and RS-485 standards only to interface electrical characteristics to make provisions, and does not involve connectors, cables or protocols, on this basis, users can establish their own high-level communication protocols. The most frequently used plug-ins we encounter in our actual work have three DB9 DB25 RJ45 plug-ins. The above three plug-ins can be used as serial

RS-232, RS-422 and RS-485 standards only to interface electrical characteristics to make provisions, and does not involve connectors, cables or protocols, on this basis, users can establish their own high-level communication protocols. The most frequently used plug-ins we encounter in our actual work have three DB9 DB25 RJ45 plug-ins. The above three plug-ins can be used as serial

transient interference within a certain amount of energy, and the duration cannot be long. Moreover, it is difficult to implement it by having to have a good channel to connect the earth. In practical application, the above two solutions are combined for flexible use, 14. In this method, the isolation interface isolates large transient interference, while the bypass element protects the isolation interface from high transient voltage breakdown.Figure 14IX. Wiring description1. Description of co

Understanding Serial Communications There are many kinds of serial communication protocols, such as rs232,rs485,rs422, even the popular USB is serial communication protocol. And the application of serial communication technology is everywhere. Perhaps everybody sees most is the computer

Currently, the commonly used serial ports include 9-pin serial ports (DB9) and 25-pin serial ports (db25). When the communication distance is close ( The connector can be divided into the public header and the mother header: The public header generic pointer connector; the mother header generic finger socket connector

/(115200 * 16))-1 = 6Its error tolerance rate:TUPCLK = 7 * * 10/12m = 0.0000933Tuexact = 10/115200 = 0.0000868UART Error = | 0.0000933-0.0000868 | /0.0000868 = 7.5%The error tolerance rate is greater than 1.86%, so at 12MHz frequency, the baud rate cannot be set to 115200, now the baud rate is set to 56700bps, using 8N1 data frame format communication, then: UBRDIVN = (int) (12M/(57600 * 16))-1 = 12TUPCLK = * * 10/12m = 0.000173Tuexact = 10/57600 = 0.0001736UART Error = | 0.000173-0. 0001736 |

is, one-bit and one-bit transmission. We often say that the serial port refers to the RS-232C interface, which was in 1970 by the American Electronics Industry Association (EIA) the serial communication standard jointly developed by Bell systems, modem manufacturers, and computer terminal manufacturers. Its full name is "Technical Standard for

LINUX serial port application developmentSerial Port OverviewThere are two basic data communication methods:Parallel Communication;Serial CommunicationSerial Communication is a commonly used computer interface, such as RS-232-C interface. This standard requires a db25-core pin connector or a

★Software Used ● Keil Software Development ● Virtual serial port Software ● Serial port debugging Assistant★Software Introduction 1. virtual serial port Software For a laptop, virtual

Serial Communication Overview There are many kinds of serial communication protocols, such as rs232,rs485,rs422, even the popular USB is serial communication protocol. And the application of serial communication technology is everywhere. Perhaps everybody sees most is the computer

Application: PPP/slip dialing to form a virtual network through which the server can communicate over the network Related links: Csdn post connection: http://bbs.csdn.net/topics/390314110? Page = 1 This article records a wince5.0 device based on serial port and PC dialing, but currently our wince6.0 device is also based on serial

Reprinted please indicate the source Author: Pony The company needs to expand the serial port to use a transplanted project. After a few days, it has finally succeeded. 2410 itself supports three UART with the same function, which can be called uart0, uart1, and uart2. how is the connection of the Board Sub-wiring of youlong, have you cited all three uarts. the circuit diagram is clear. From the two

It is well known that JZ2440 V3 is very small and exquisite. Today, we will discuss some problems with the JZ2440 serial port alone. When debugging with the serial port, we need to use a USB cable from JZ2440 to connect the computer USB port and the USB-COM1