Portable Balancer Of Leucocyte Design Based On Embedded System Of ARM

Embedded System is a special computer system that be taken application as center and hardware curable. It is suitable for the application system that is very strict in request of function, reliability, cost, volume and Consumption. The kernel of hardware in embedded system is embedded microprocessors, which usually have some characters such as architecture extendable, low power absorption and real time multitask supported. ARM, the RISC processor, because of its cost-efective, low power and simple, has been particularly suitable for designing embedded systems. On the other hand, to meet the need of real-time multitasking, embedded Real Time Operating System (RTOS) is becoming popular.μcC/OS-II is a good choice for Real Time Operating Systems, which has the characters such as small codes, open and free source codes, stable performance and easy to port.A embedded system based on ARM processor LPC2114-portable balancer of leukocyte is designed. Its principle is electrotherapeutics of low-frequency pulse, that use the low-frequency pulse that to excite point of body to achieve goal of treatment, and make people feel comfortable by the stimulate of the special frequency and scope of pressure.Detailedly introduced process and method to develop the software and hardware, power supply, anti-jamming and debugging of the ARM embedded application system-portable balancer of leukocyte in this paper. First, the definition, constitution and characteristics of the embedded system, and the theory of portable balancer of leukocyte, and the trend of progress of medical instrument are introduced;Second, introduced the architecture of ARM and the ARM processor;Third, detailedly introduced the hardware design of the system, introduced every function hardware circuit of the system with each module separately, emphases the method of PWM chopping circuit;And then introduced the method of software of portable balancer of leukocyte, in the chapter characteristic of real-time operating system μC/OS-II and the process of uC/OS-II portable in LPC2114, the structure of software and flow chart of programme based on (μC/OS-II are given too;And then, introduced method of power supply design, and the method of design switching regulated power supply usingUC3845;Lastly, the measure of anti-jamming, principia of designing PCB, the method of debugging hardware and software are introduced.The dissertation is very useful to embedded system freshers and developers. It can help them rapidly grasp the main feathers and important places in hardware design and programming of embedded low drivers in embedded system.