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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
- 积分:1
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串口程序,使用vc编写,好东西,大家可以分享一下。
串口程序,使用vc编写,好东西,大家可以分享一下。-Serial procedures, the use of vc preparation, good things, we can share.
- 2022-08-17 14:13:41下载
- 积分:1
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通过USB接口利用多媒体进行数据采集的源程序,通过调试的。...
通过USB接口利用多媒体进行数据采集的源程序,通过调试的。-through the USB interface for multimedia data acquisition of the source, through the debugger.
- 2022-11-28 11:55:03下载
- 积分:1
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fxa
fxa-interface 接口的vb程序plc-fxa-interface interface vb procedures plc
- 2022-02-02 11:27:40下载
- 积分:1
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SPCE061A为核心的转换控制(Drivers汇编代码):以太网 RS232
SPCE061A为核心的转换控制(Drivers汇编代码):以太网 RS232-SPCE061A at the core of the change of control (Drivers assembly code): Ethernet RS232
- 2022-05-05 21:55:10下载
- 积分:1
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telephone billing management system, a small switch on the small software, we ca...
电话计费管理系统,小交换机上的小软件,大家可以了解一下-telephone billing management system, a small switch on the small software, we can find out
- 2023-05-19 09:25:03下载
- 积分:1
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支持zmodem通讯协议的包装类
支持zmodem通讯协议的包装类- Supports the zmodem communication agreement the packing class
- 2022-10-20 10:50:04下载
- 积分:1
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全面分析了RS
全面分析了RS-232、RS-422、RS-485之间的区别-comprehensive analysis of the RS-232, RS-422, RS-485 the distinction between
- 2023-04-13 11:25:03下载
- 积分:1
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串行通讯的源程序,希望帮到人哦。是再LAB2000系统下实现过的...
串行通讯的源程序,希望帮到人哦。是再LAB2000系统下实现过的-Serial communication source, hoping to help people, oh. LAB2000 system is re-realize-off
- 2022-09-22 05:05:03下载
- 积分:1
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Siemens 300 a procedure. Is HMI (WINCC) integration of a program
西门子300的一个程序。是和HMI(WINCC)集成的一个程序-Siemens 300 a procedure. Is HMI (WINCC) integration of a program
- 2023-06-21 02:25:04下载
- 积分:1