Portable Biomedical Electrotherapoutics Apparatus Design Based On ARM

With the development of the new technology revolution, and the advancement of the electronic technologies, the biomedical field also gained great achievement. A lot of new technologies, such as the embedded system, have been applied in the biomedical field. The quality and number of the practitioners rise quickly in the biomedical field. So, more and more new products appear, especially in the biomedical electronic apparatus field, and the biomedical companies also develop quickly.This subject is one of the hot points in the biomedical field. Our destination is to design a biomedical electronic apparatus. Our research is based on the low frequency electrotherapeutics, which use the low frequency pulse 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.The whole system is divided into two parts. One is the control part, which is based on the LPC2290 (MCU). LPC2290 is a high quality MCU, and has a strong kernel (ARM7). The ARM7 is designed specially for the embedded system, and has become one of the most popular kernel in the embedded system for its high quality, low cost and low power. To enhance the performance of system, we design a GUI system, which help us to realize the nicer communication between human and the machine by the color LCD and touch screen control. On the other hand, to meet the need of real time multitasking, embedded Real Time Operating System (RTOS) is becoming popular. uC/OS-II is a good choice for our system, which has the characters such as small codes, open and free source codes, stable performance and easy to repot. So, we repot the uC/OS-II and design the software based on it. To make the uC/OS-II suitable to our system, we especially improve its Timer system.The other part is the PWM interface circuit, which is very important. Its main task is to amplify the PWM pulses, then filter the PWM pulses.This thesis describe the system from six important parts including theory study, system study, hardware design, GUI design, software design based on uC/OS-II,...