文件名称:用c语言编写串口程序
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用c语言编写串口程序
在当今,流行的编程软件种类繁多,它们编程方便、易于维护,但是在与硬
件直接打交道和编制系统软件时却束手无策,于是C语言就有了用武之地。C语言
作为汇编语言与高级语言之间的一种过渡语言,兼有汇编语言的高效和高级语言
的方便。
在通讯中,为了保证行运安全可靠,标准的串行口必须具有许多握手信号和
状态信息。这是因为通讯的各个计算机CPU速度不一样(这会导致“错帧”)以
及发送机发送数据速度比接收机接收速度快(这会导致“过冲”)。为解决这个
问题,我们采用一个简单的握手信号,即发送机每次仅发送半个字节(低4位)
的数据,而另外半个字节(高4位)则用来传送信息。我们可以对信息位(高4位)
进行如下简单的编码:
0H:发送的是新的半个字节数据
1H:重新发送上次传送错误的数据
2H:文件名结束
3H:文件结束
这样,每当发送机发送一个字节以后,就等待接受机发回送信号,这回送信号就
是发送机发送过来的那个字节。发送机接收到回送信号后,把它与刚发送的字节
相比较,如果相同,就发送新的半个字节,否则就重新发送。新数据与旧数据通
过信息位来区分。下面就是用C语言编写控制串行口的程序。
-Serial procedures in the preparation of today's popular programming software, and a large variety of their programming and easy to maintain, but to deal directly with the hardware and system software when compiled a loss, so there will be a C language battlefield. C language as the compilation and Advanced Language a transition between languages, both assembly language and the efficient high-level language convenience. In telecommunications, in order to ensure safe and reliable transport firms, the standard serial I must have shook hands with many signals and state information. This is because the various computer communications CPU speed is not the same (this would lead to "the wrong fr a me") and transmitter to send data faster than fast receiver to receive (this would lead t
在当今,流行的编程软件种类繁多,它们编程方便、易于维护,但是在与硬
件直接打交道和编制系统软件时却束手无策,于是C语言就有了用武之地。C语言
作为汇编语言与高级语言之间的一种过渡语言,兼有汇编语言的高效和高级语言
的方便。
在通讯中,为了保证行运安全可靠,标准的串行口必须具有许多握手信号和
状态信息。这是因为通讯的各个计算机CPU速度不一样(这会导致“错帧”)以
及发送机发送数据速度比接收机接收速度快(这会导致“过冲”)。为解决这个
问题,我们采用一个简单的握手信号,即发送机每次仅发送半个字节(低4位)
的数据,而另外半个字节(高4位)则用来传送信息。我们可以对信息位(高4位)
进行如下简单的编码:
0H:发送的是新的半个字节数据
1H:重新发送上次传送错误的数据
2H:文件名结束
3H:文件结束
这样,每当发送机发送一个字节以后,就等待接受机发回送信号,这回送信号就
是发送机发送过来的那个字节。发送机接收到回送信号后,把它与刚发送的字节
相比较,如果相同,就发送新的半个字节,否则就重新发送。新数据与旧数据通
过信息位来区分。下面就是用C语言编写控制串行口的程序。
-Serial procedures in the preparation of today's popular programming software, and a large variety of their programming and easy to maintain, but to deal directly with the hardware and system software when compiled a loss, so there will be a C language battlefield. C language as the compilation and Advanced Language a transition between languages, both assembly language and the efficient high-level language convenience. In telecommunications, in order to ensure safe and reliable transport firms, the standard serial I must have shook hands with many signals and state information. This is because the various computer communications CPU speed is not the same (this would lead to "the wrong fr a me") and transmitter to send data faster than fast receiver to receive (this would lead t
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