Development Of Embeded Data Acquisitions And Control System Based On VxWorks

With the development of computer technology, the performance of the embedded micro processor have a great improvement, and it makes the embedded system have a wide range of applications in many fields. The design of the control-and-protection unit, part of a certain kind of aircraft power supply, is such application of embedded system in data acquisition and control system.The hardware design of the control-and-protection unit, based on PC/104 bus, including: the selection of embedded computer; the data acquisition board and its signal condition circuits, is completed in this project.The software design of this project ,which is based on VxWorks ,is also finished. VxWorks is one of such RTOS(Real Time Operation System) that have a priority-based preemptive kernel. This paper gives a detailed description of VxWorks kernel, including task management, interrupt and timing management, etc.This paper pays more attention on the device driver management of VxWorks and the relationship between device driver and BSP. The device driver of data acquisition board ADT600 for VxWorks is also completed in this project.In order to improve the reliability of the control-and-protection unit, some reliable measurements both in hardware and software are mentioned at the end of this paper.