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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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Project how to make jtag rs232 programmator
Project how to make jtag rs232 programmator
- 2022-08-15 08:02:25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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串口通信程序,使用COM1串口进行计算机通信的软件
串口通信程序,使用COM1串口进行计算机通信的软件-Serial communication program, use the COM1 serial port for computer communications software
- 2022-01-27 21:24:53下载
- 积分:1
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PLC串口编程,通过RS232和RS485通讯…
PLC串口编程,通过RS232和RS485与上位机通讯.-PLC serial port programming, through the RS232 and RS485 communication with the host computer.
- 2022-02-02 14:04:36下载
- 积分:1
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串口通讯程序编写实例
串口通讯程序编写实例-serial communications programming examples
- 2022-12-15 12:25:03下载
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GOLD comunication rule
是关于中达电源通信规约的串口通信程序,功能是把电源监控器的采集数据上送到规约前置机中。-GOLD comunication rule
- 2022-04-11 13:49:57下载
- 积分:1
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6017FM in Mountain View, audio initialization procedure, good results!
6017FM在山景音响初始化程序,效果很好!-6017FM in Mountain View, audio initialization procedure, good results!
- 2023-07-03 17:25:03下载
- 积分:1
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IC卡考勤系统源码,动态链接库函数显示…
IC卡考勤系统源代码,动态连接库中函数说明,源程序中有相关的使用说明.-IC card attendance system source code, dynamic link library functions show that the source is related to the usage instructions.
- 2022-04-27 22:12:11下载
- 积分:1
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串行接口通讯试验该试验可以学习如何编写一个通讯程序。这个试验能够实现的功能很简单,仅仅作为试验用。工作环境为:无需其余任何环境,直接接通电源即可。...
串行接口通讯试验该试验可以学习如何编写一个通讯程序。这个试验能够实现的功能很简单,仅仅作为试验用。工作环境为:无需其余任何环境,直接接通电源即可。-serial communication interface test of the pilot can learn how to prepare a communication process. The pilot function can be achieved is very simple, just to experiment with. The working environment : the environment without any rest, can be directly connected to power.
- 2022-04-16 23:18:02下载
- 积分:1