ABSTRACT
Data acquisition (DAQ), from the sensor, and other means to analog and digital equipment by measuring unit automatically by the electricity power, or to signal analysis, in the upper machine. Using a device from external data collection system and input to the internal system of an interface. Data collection technology is widely quoted in various fields.
In real-time, and safety requirements for complex system of higher as image monitoring system, network communication system), the traditional mechanism based on single chip of data acquisition system is hard to do. With the development of computer technology, embedded computer system (hereinafter referred to as the embedded system) as an important field of computer application already deeply into every aspect of society, the so-called embedded system refers to the computer system is applied, but the computer technology application system is an important part of the embedded application system, to the central is used as the center, take the computer technology as the foundation, software and hardware can cut the special computer operating system. The embedded real-time operating system is the soul of embedded systems, she bears a task scheduling, mission control and synchronization and communication between tasks, resource management, storage management, etc.
Based on embedded real-time operating system uc/OS - ii and LPC2214 SCM design a kind of typical data acquisition system. The security of the system, good real-time, convenient and flexible expandability, and can be used in industrial instrumentation, video surveillance system.
Keywords: SCM,μC/OS-II, Data acquisition, Hardware driver,
Embedded C
