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从串口读取数据,有两种方法,1、每接收一个EV_RXCHAR,就用ReadFile读一次,这样我觉得太恐怖了。2、接收到一个EV_RXCHAR后,等一定数据量的...
从串口读取数据,有两种方法,1、每接收一个EV_RXCHAR,就用ReadFile读一次,这样我觉得太恐怖了。2、接收到一个EV_RXCHAR后,等一定数据量的CPU周期(GetTickCount),再一次性读取缓冲区里的数据。这样做,一般情况下不会有问题,但是,如果数据很多,过了“一定数据量的CPU周期”,还没收完数据怎么办?就会少读数据了。 我用三个线程序来完成串口数据的接收,其实就是第一种方法的变种: 一个侦听EV_RXCHAR,一个对EV_RXCHAR进行分析,其实就是超时判断。如果接收到一个消息后,一段时间没收到下一个EV_RXCHAR,就认为是一个数据包的结束。这个线程就会通知数据接收线程,进行数据接收。一般同一包数据,两个字符之间的时间间隔,应该很小了吧,而两个数据包之间的间隔,应该不会太小吧!(这个地方我不清楚,猜的:( :) )最后一个线程,是接收数据的。-read data from the serial port, there are two methods, one, each receiving a EV_RXCHAR, on the ReadFile read, I think this vote. 2, received a EV_RXCHAR after a certain volume of data, such as CPU cycles (GetTickCount), and the one-time reader, the data buffer. To do so, under normal circumstances there is no problem, but if many of the data, and after a "certain amount of data the CPU cycles," also confiscated End Data how do? Few will read the data. I used three lines to complete serial data reception, the first method is a variant : an interception EV_RXCHAR, one pair of EV_RXCHAR analys
- 2023-03-23 09:55:03下载
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Bluetooth
Bluetooth
- 2022-03-05 11:22:11下载
- 积分:1
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通过串行口接收并显示电力质量检测变送器信息
通过串行口接收并显示电力质量检测变送器信息-through the serial port indicates that the power to receive and the quality of information detection Transmitter
- 2023-07-19 04:20:04下载
- 积分:1
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该程序实现了串口之间的相互通信,是异步串口通信,可以设置串口号...
该程序实现了串口之间的相互通信,是异步串口通信,可以设置串口号-Implementation of the procedures between the serial communications, serial communication is asynchronous, the classic experimental procedures for computer networks
- 2022-12-10 11:00:02下载
- 积分:1
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C language library DOS version of the communication process to support 115200 ba...
C语言通讯程序库DOS版,支持10个115200波特率的通讯口-C language library DOS version of the communication process to support 115200 baud rate of 10 communications port
- 2022-03-06 10:59:36下载
- 积分:1
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串口通讯在客户端/服务器类型的应用程序设计中经常使用…
串口通讯在客户端/服务器类型的应用程序设计中经常要使用到,目前串口通讯采用的一般是专用软件包或者标准串口通讯协议(如XMODEM、ZMODEM等),这样完整详细且免费的软件包比较少,所以在SPCOMM的基础之上建立了本文所描述的串口通讯协议,称之为RCC(表示为Reliable Comm Communication),其主要目标是在用串口进行通讯的客户端/服务器双方建立一条可靠的通讯链路,就象TCP(RFC793)一样。该协议的目前的开发是采用VC++,应用平台为WIN95/NT,但作为RCC协议的本身不受具体编程语言及操作系统所限制-Serial port communication in client/server type of application design often use to the current serial communication is generally used in special packages or a standard serial communication protocols (such as XMODEM, ZMODEM, etc.), such a complete package details and free more less so on the basis of established SPCOMM described in this article serial communication protocol, called RCC (expressed as a Reliable Comm Communication), whose main objective is to communicate with the serial port client/server sides to establish a reliable communication link, like TCP (RFC793) the same. The current development of the protocol is used VC++, application platform for WIN95/NT, but as the agreement itself, RCC concrete programming
- 2023-02-24 10:55:03下载
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是一个用VB编写的OPC客户端数据采集程序,在工业控制上经常会用到该通讯方式...
是一个用VB编写的OPC客户端数据采集程序,在工业控制上经常会用到该通讯方式
- 2022-01-30 23:33:05下载
- 积分:1
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Why is a mass of documents are so annoying, people are stupid! Why Chuan a file...
为什么传一个文件都这么烦了,人都傻了!为什么传一个文件都这么烦了,人都傻了!-Why is a mass of documents are so annoying, people are stupid! Why Chuan a file are so annoying, people are stupid!
- 2023-01-06 21:55:03下载
- 积分:1
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Communications routines 485 for them to learn from the reference. Communications...
485通讯例程,供大家学习参考。 -Communications routines 485 for them to learn from the reference. Communications routines 485 for them to learn from the reference.
- 2022-11-08 14:55:03下载
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此源代码是一个很复杂的串口通信的例子,序,可以运行。
此源代码是一个很复杂的串口通信的例子,序,可以运行。-this source code is a very complicated serial communication example, sequence, can run.
- 2022-03-11 19:00:04下载
- 积分:1