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Based on USB technology and rotary encoders rotary motion detection and control system


Fig. Bai Zhi application gastric tone I ... i 'device driver. 1l hardware kernel-mode bus driver firmware firmware chip is curing secluded 2 to USB controller chip program memory in the process. It is designed by the assembly language, and its main function is to: receive and respond to various requests for USB driver, receiving and delivering the treatment protocol format in the USB serial interface engine by the SIE to complete; receive computer instruction, control data channel and D / A converter to work. The development of our package in the computer programming, and then connect the computer with the EZ-USB development board for a 232 RS wiring, to write it into the firmware chip. Drivers, including bus drivers and device drivers. Bus driver, including the host controller driver (HCD) and the USB class driver (USBD), which is part of the operating system, computer operating system we chose WIN2000. On the one hand, it is associated with the underlying hardware to handle the bus traffic affairs; the other hand, between it and the device drivers by including URB (USBRequestBlock) of the IRP (I / ORequestPacket) to achieve information exchange. Device drivers can use the system comes with the class driver (such as the HID class driver), also can use a custom driver, it is based on WDM (WindowsDriverMode1), can be written VC + + and wINDDK. Drive, including our custom initialization module, plug and play management module, power management module, I / O modules. DriveEntry population initialization module provides a lot of points to achieve the initialization function. Plug and play management module USB devices hot swap and dynamic configuration. Power management module suspend, resume, and other state and its conversion control. I / O function modules complete the I / O requests of most of the work. Applications include device drivers to communicate with the dynamic link library, as well as for software analysis. The system can measure the speed and generate the output control increments, can measure the speed of the smoothness, and the cyclical turning circle the abnormal positioning. The system used in machine tools in the laboratory of the drive motor, to obtain a more satisfactory test results. 4 Conclusion The use of advanced computer technology,[link widoczny dla zalogowanych], the technological transformation of traditional electromechanical industry, is to enhance the competitiveness of our industry, an important way. In China's large equipment manufacturing industry, the use of the system in large, contained in the load detection and control of the motor has good application prospects. References 1JanAxelson. USB Daquan. China Electric Power Press 2 Nian Huai and so on. USB Bus Interface Developer Guide. National Defence Industry Press 3 Zhang Haibing and so on. USB technology and its image data transmission in an application. Application Research of Computers, 2002,24 Xu attack and so on. VB-based USB device detection communications. Application Research of Computers,[link widoczny dla zalogowanych], 2002,11 【l page 33 are connected to 5 ASCII string with the format \. Bed machine to a central machine data, including ECG data, pulse data, blood pressure data, respiratory data,[link widoczny dla zalogowanych], blood oxygen data, the data packet format is as follows: \, different data header in line with the character \for the \Strictly consistent with the data communication format is the central unit and a bedside machine data communication between the right premise. 4 Conclusion 18 * serial data communication as the basis for the central monitoring system is directly related to the stability of the whole monitoring system reliability. This article describes in detail the central monitoring system in data communications software module design methods and development process needs attention. We have developed a set of central monitoring system has been used in many hospitals, the system is stable and reliable operation,[link widoczny dla zalogowanych], the central unit and bedside machine can achieve efficient, real-time two-way communication. References 1MarkNelon. Serial Communications Developer Guide [M]. Xiaoxiang studio translation. Beijing: China Water Power Press, 20002 Li Cun Bin et al. Ddp depth of programming and application development projects. Beijing: China Water Power Press, 20023 Y. Wang. Practical C Programming Language. Beijing: Tsinghua University Press,[link widoczny dla zalogowanych], 1996

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