Description: 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 frame") and transmitter to send data faster than fast receiver to receive (this would lead t Platform: |
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Author:王平 |
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Description: 《data and computer communications》一书的ppt，非常不错，供大家学习参考-"data and computer communications," a book ppt, very good reference for all learning Platform: |
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Description: 当今社会是信息化的社会。为了适应社会对计算机数据安全保密越来越高的要求，美国国家标准局(NBS)于1997年公布了一个由IBM公司研制的一种加密算法，并且确定为非机要部门使用的数据加密标准，简称DES(Data Encrypton Standard)。自公布之日起，DES算法作为国际上商用保密通信和计算机通信的最常用算法，一直活跃在国际保密通信的舞台上，扮演了十分突出的角色。现将DES算法简单介绍一下，并给出实现DES算法的VC源代码。
DES算法由加密、解密和子密钥的生成三部分组成。-society today is the information society. In order to adapt to society for computer data security and confidentiality of the increasingly high demand the National Bureau of Standards (NBS), released in 1997 by an IBM developed an encryption algorithm, identified departments use non-confidential data encryption standard short DES (Data Encrypton Standard). Since the date of publication, DES algorithm as an international business confidential communications and computer communications of the most commonly used algorithm, international has been active in the confidential communications on the stage to play a very prominent role. DES algorithm will now give a brief account, and gives DES algorithm to achieve the VC source. DES algorithm by encryption, decryption keys and sub-generated three co Platform: |
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Description: 我写的一个串口通讯的程序,该程序可以将收到的命令和文本重的程序进行比较,再将数据发回,适合通讯设备和电脑的通讯-I write a serial communication program, which can be ordered and received the text of heavy procedures, further data back, suitable for communications equipment and computer communications Platform: |
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Description: 当今社会是信息化的社会。为了适应社会对计算机数据安全保密越来越高的要求，美国国家标准局(NBS)于1997年公布了一个由IBM公司研制的一种加密算法，并且确定为非机要部门使用的数据加密标准，简称DES(Data Encrypton Standard)。自公布之日起，DES算法作为国际上商用保密通信和计算机通信的最常用算法，一直活跃在国际保密通信的舞台上，扮演了十分突出的角色。现将DES算法简单介绍一下，并给出实现DES算法的VC源代码。
DES算法由加密、解密和子密钥的生成三部分组成。-society today is the information society. In order to adapt to society for computer data security and confidentiality of the increasingly high demand the National Bureau of Standards (NBS), released in 1997 by an IBM developed an encryption algorithm, identified departments use non-confidential data encryption standard short DES (Data Encrypton Standard). Since the date of publication, DES algorithm as an international business confidential communications and computer communications of the most commonly used algorithm, international has been active in the confidential communications on the stage to play a very prominent role. DES algorithm will now give a brief account, and gives DES algorithm to achieve the VC source. DES algorithm by encryption, decryption keys and sub-generated three co Platform: |
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Description: 数据与计算机通信(英文)第六版课后习题参考答案,完整的!-data and computer communications (English) version of the sixth after-school reference to answer the questions and complete! Platform: |
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Author:少华 |
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Description: William Stallings - Data and Computer Communications PPT slides-William __________-Data and Computer Comm unications PPT slides Platform: |
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Author:pudn_zhang |
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Description: 在数据采集系统中，USB接口技术以其高传输速度，简便的连接，以及其高通用性和高稳定性，比PCI等其他采集更适合与计算机的通信。本文系统介绍了基于USB2.0接口的数据采集系统的开发过程，以及硬件设计、固件、驱动和应用程序的设计等。本系统可实现模拟信号的采样和多路开关量输入、输出。并可通过对USB接口芯片可编程控制接口的设计实现数据的高速连续采样和传输。-Data Acquisition System, USB interface technology with a high transmission speed, ease of connectivity, and its high versatility and high stability over other PCI Acquisition is more suitable for computer communications. This paper introduced a system based on USB2.0 interface data acquisition system development process, and hardware design, firmware, Driver, and application of design. The system can be realized analog signal sampling and multi-switch input and output. Accessible through the USB interface chip programmable control interface design to achieve high-speed data transmission and continuous sampling. Platform: |
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Description: 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：-today, the popularity of the wide variety of software programming, is 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 frame") and transmitter to send data faster than fast receiver to receive (this would lead to "overshoot"). To address this pr Platform: |
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Author:朱亮 |
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Description: 《data and computer communications》一书的ppt，非常不错，供大家学习参考-"data and computer communications," a book ppt, very good reference for all learning Platform: |
Size: 5545984 |
Author:许冉 |
Hits:
Description: 数据与计算机通信(英文)第六版课后习题参考答案,完整的!-data and computer communications (English) version of the sixth after-school reference to answer the questions and complete! Platform: |
Size: 758784 |
Author:少华 |
Hits:
Description: William Stallings - Data and Computer Communications PPT slides-William __________-Data and Computer Comm unications PPT slides Platform: |
Size: 6412288 |
Author: |
Hits:
Description: 在数据采集系统中，USB接口技术以其高传输速度，简便的连接，以及其高通用性和高稳定性，比PCI等其他采集更适合与计算机的通信。本文系统介绍了基于USB2.0接口的数据采集系统的开发过程，以及硬件设计、固件、驱动和应用程序的设计等。本系统可实现模拟信号的采样和多路开关量输入、输出。并可通过对USB接口芯片可编程控制接口的设计实现数据的高速连续采样和传输。-Data Acquisition System, USB interface technology with a high transmission speed, ease of connectivity, and its high versatility and high stability over other PCI Acquisition is more suitable for computer communications. This paper introduced a system based on USB2.0 interface data acquisition system development process, and hardware design, firmware, Driver, and application of design. The system can be realized analog signal sampling and multi-switch input and output. Accessible through the USB interface chip programmable control interface design to achieve high-speed data transmission and continuous sampling. Platform: |
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Author:陈蕾 |
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Description: 数据与计算机通信(第七版)答案。英文版的，全部答案都有。供参考和学习-Data and computer communications (seventh edition) answers. English, all have the answer. For reference and learning Platform: |
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Author:王峰 |
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Description: 关于数据和计算机通信的一本经典教材，从各个部分进行了详细的说明。-Data and computer communications on a classic textbook, from all parts of the detailed description. Platform: |
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Description: 该程序主要是stm32做主机去读取Eprom，然后将读到的数据上传到电脑，文件有程序，PCB以及电脑上的助手-The program is mainly stm32 host to read Eprom, and then read the data uploaded to the computer, the file has procedures, PCB and computer assistant Platform: |
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Author:林奇 |
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