Abstract
The controller is the brain of Industrial production system . With the development of science and technology, production and development of intelligent,developing the Miniaturization of PID controller is more and more importance.However, the eight processors generally due to the low performance has been unable to meet a large number of data processing, production systems more difficult to meet real-time, multi-mission requirements. Therefore, the 32-bit processor with its high cost, superior performance products is being developed to become the preferred controller.
This article focuses on introducing embedded system design of PID. This system includes the hardware system and software systems. Hardware system is mainly used in the signal conversion circuit to convert the signal processor can handle the signal or the external device can identify the signal. Software system mainly used software applications received from an external device drivers from bottom of data, through the screen to interact with users,getting the PID parameters Settings,and then ARM9 processor can carry thre calculating of PID, finally the PID data display in man-machine interface. This article describes in detail the DA, AD, touch screen-driven process and prepared to use Qt applications, as well as to the process of transplantation to the ARM9.
Keywords:PID、Linux Device Drivers、Embedded Linux Systems、Qt