The Development Of Wireless Non-contact Mouse Based On ZigBee Technology

Mouse is a peripheral equipment of computer that used frequently by people, the development of its technology is paid much attention. Traditional mouse includes mechanical mouse and photoelectrical mouse, both of them depend on planar work platform to apperceive the change of the displacement. Along with the variety of the work occasion and client requirement, a kind of wireless non-contact mouse is increasingly needed, it dose not depend on planar platform and limited by distance. In the same time, how to reduce the volume and debase the consume of power is also paid attention by people.In this thesis, the design and development of a wireless non-contact mouse based on ZigBee wireless communication technology, used micro-accelerometer MMA7260QT, low power consume micro-processor PIC24FJ64GA002 and ZigBee wireless transmitting and receiving module are elaborated. This mouse include two parts: mouse main body and mouse receiver. The mouse main body detects acceleration of the move used micro-accelerometer; the microprocessor converts it into position information by digital integral algorithm; ZigBee wireless transmit module sends the displacement information to mouse receiver, so computer gets it through the PS/2 port. This mouse does not need specific work platform and reduces the limitation of the working space and freedom of movements.The hardware and software design, digital integral algorithm and wireless transmission system are described in detail, and the system test and algorithm simulation are also given. Aimed at the requirement of cubage and power resume of this mouse, each part of the system was selected and designed. According to the characteristics of accelerometer output signal, the design of acceleration signal conditioning circuit, the data sampling of the acceleration signal by MCU and the digital integral are presented in detail. In addition, system functional software flow and ZigBee communication program are also presented.The test result showed that the mouse can basically meet user's requirements in terms of response speed, position accuracy, power consumption and sensitivity. The design method of two-dimensional mouse described in this thesis lays a good foundation for further study on multi-functional and multi-dimensional micro-accelerometer input devices.