Description: This is a photo of a general purpose timer/counter card you can wirewrap in a weekend. It plugs into your PC s ISA bus just like a sound or modem card. It gives high-resolution timing (microseconds). Because of its programmablity, it is very powerful and flexible. You can even control DC or servo motors using pulse-width modulated (PWM), or stepper motors using its square wave capabilities. The figure below is the actual output (square wave) from the 8254 card captured by an oscilloscope: Platform: |
Size: 10545 |
Author:海应 |
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Description: This a p熟悉SQL SERVER 2000的数据库管理员都知道，其DTS可以进行数据的导入导出，其实，我们也可以使用Transact-SQL语句进行导入导出操作。在 Transact-SQL语句中，我们主要使用OpenDataSource函数、OPENROWSET 函数，关于函数的详细说明，请参考SQL联机帮助。利用下述方法，可以十分容易地实现SQL SERVER、ACCESS、EXCEL数据转换，hoto of a general purpose timer/counter card you can wirewrap in a weekend. It plugs into your PC s ISA bus just like a sound or modem card. It gives high-resolution timing (microseconds). Because of its programmablity, it is very powerful and flexible. You can even control DC or servo motors using pulse-width modulated (PWM), or stepper motors using its square wave capabilities. The figure below is the actual output (square wave) from the 8254 card captured by an oscilloscope: -This a p familiar with the SQL Server 2000 database administrators know, the DTS can import data is derived, in fact, we can also use Transact-SQL for importing and exporting operation. The Transact-SQL statements, we mainly use OpenDataSource function, OPENROWSET function, the function of the details, please refer to SQL online help. Use the following method, it is easy to SQL Server, Access, Excel data conversion, HOTO of a general purpose timer / counter card you can wirewrap in a weekend. It plugs into your PC ISA bus s just like a sound card or modem. It gives high-resolution timing (microseconds). Because of its programmablity, it is very powerful and flexible. You can even control or DC servo motors using pulse-width modulated (PWM), or Stepper motors using its square wave capabi Platform: |
Size: 5788 |
Author:海应 |
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Description: This is a photo of a general purpose timer/ 在我们写的程序当中,总有一些配置信息需要保存下来,以便完成程序的功能,最简单的办法就是将这些信息写入INI文件中,程序初始化时再读入.具体应用如下:counter card you can wirewrap in a weekend. It plugs into your PC s ISA bus just like a sound or modem card. It gives high-resolution timing (microseconds). Because of its programmablity, it is very powerful and flexible. You can even control DC or servo motors using pulse-width modulated (PWM), or stepper motors using its square wave capabilities. The figure below is the actual output (square wave) from the 8254 card captured by an oscilloscope: -This a photo of a general purpose timer. When we write program, There is always some configuration need to be saved, so that we can finish the function of the program.The most simple way is write these infomation to the INI file. It is read by the program during initialization,it is used as follows: counter card you can wirewrap in a weekend. It plugs into your PC s ISA bus just like a sound or modem card. It gives high-resolution timing (microseconds). Because of its programmablity, it is very powerful and flexible. You can even control DC or servo motors using pulse-width modulated (PWM), or stepper motors using its square wave capabilities. The figure below is the actual output (square wave) from the 8254 card captured by an oscilloscope: Platform: |
Size: 6333 |
Author:海应 |
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Description: This a p熟悉SQL SERVER 2000的数据库管理员都知道，其DTS可以进行数据的导入导出，其实，我们也可以使用Transact-SQL语句进行导入导出操作。在 Transact-SQL语句中，我们主要使用OpenDataSource函数、OPENROWSET 函数，关于函数的详细说明，请参考SQL联机帮助。利用下述方法，可以十分容易地实现SQL SERVER、ACCESS、EXCEL数据转换，hoto of a general purpose timer/counter card you can wirewrap in a weekend. It plugs into your PC s ISA bus just like a sound or modem card. It gives high-resolution timing (microseconds). Because of its programmablity, it is very powerful and flexible. You can even control DC or servo motors using pulse-width modulated (PWM), or stepper motors using its square wave capabilities. The figure below is the actual output (square wave) from the 8254 card captured by an oscilloscope: -This a p familiar with the SQL Server 2000 database administrators know, the DTS can import data is derived, in fact, we can also use Transact-SQL for importing and exporting operation. The Transact-SQL statements, we mainly use OpenDataSource function, OPENROWSET function, the function of the details, please refer to SQL online help. Use the following method, it is easy to SQL Server, Access, Excel data conversion, HOTO of a general purpose timer/counter card you can wirewrap in a weekend. It plugs into your PC ISA bus s just like a sound card or modem. It gives high-resolution timing (microseconds). Because of its programmablity, it is very powerful and flexible. You can even control or DC servo motors using pulse-width modulated (PWM), or Stepper motors using its square wave capabi Platform: |
Size: 5120 |
Author:海应 |
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Description: 属于多媒体技术这部分，利用PC喇叭来播放声音，对之进行控制。-Belonging to this part of multimedia technology, the use of PC speakers to play sound, of the control. Platform: |
Size: 13312 |
Author:nick |
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Description: 作者：华清远见嵌入式学院。《Linux设备驱动开发详解》（08&09年度畅销榜TOP50）第21章、PCI设备驱动。PCI（及cPCI）总线在一般的小型手持设备中不太可能用到，但是在工控和通信设备及其PC中却引领着潮流。在Linux系统中，PCI设备驱动和USB设备驱动有共性，那就是其驱动都由总线相关部分和自身设备类型驱动两部分组成。21.1节讲解了PCI总线及其配置空间，给出了PCI总线在Linux内核中的数据结构。PCI设备驱动的PCI相关部分围绕着pci_driver结构体的成员函数展开，21.2节讲解了pci_driver结构体及其成员函数的含义，并分析了PCI设备驱动的框架结构。21.3节以Intel 810主板集成声卡为实例进一步讲解PCI设备驱动的编写方法。-Author: HuaQing vision embedded institute. The Linux device driver development "(08 and 09 sep TOP50) annual list of best-selling chapter 21, PCI device drivers. PCI cPCI (and in general) bus small hand-held devices not too, but may be used in industrial control and communication equipment and PC is leading the trend. In Linux system, PCI device drivers and USB device drivers have common, and that is the driving all relevant parts by bus and their own equipment type drive two parts. Section 21.1 explained PCI bus and the configuration space is given, and the PCI bus in the Linux kernel of data structure. PCI device driver PCI relevant parts around the pci_driver structure members of the body function expansion, section 21.2 explained pci_driver structures and its member function meaning, and analysis the PCI device driver frame structure. Section 21.3 to 810 motherboard integration intel-based ? sound card Platform: |
Size: 550912 |
Author:华清远见 |
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Description: 通过dsp的usb2.0与pc相连，然后pc把要放音和要录音的文件通过usb2.0实时传到dsp，dsp根据算法来控制8个录放音通道中的那个通道放音和录音-By the dsp usb2.0 connected with pc and pc to want to play and want to record files transmitted in real time via usb2.0 dsp, dsp according to the algorithm to control eight channels of sound recording that channel playback and recording Platform: |
Size: 1010688 |
Author:hanlikui |
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