Human-machine Interface System Based On DSP

With the fast development of the communication science,the human-information is becoming more and more important and have become the hot spots in domestic and abroad. The use of voice as a means of human-computer interaction for users is a very convenient, very natural way. The touch screen has also presently become the main input equipment in public occasions. and its easy to use, strong, fast response, a space-saving advantages make touch screen a broader application prospect.The DSP chips are designed to mainly realize all kinds of the arithmetic of Digital Signal Processing. The Structure of the DSP chips is Harvard. DSP are getting more and more attentions in the information field, due to its powerful signal processing ability, which is becoming a hotspot in communication and other correlative signal processing fields. The AD7843 chip used to control touch screen and its characteristics, structure, function and work mode are described.The main theory about human–machine interface system architecture is analysed in accordance with its characteristics. According to current equipment and chip, we accomplish the hardware design. This system contains LCD module, touch screen module, voice processing module, DSP-MCU link module. We use the DSP chips TMS320C6713 models as a core processors and research LCD display, touch screen input, voice signal communication and etc. Different kinds of touch screen principles are analyzed, and mentions four-resistance touch screen in particular. DSP connects MSP430 through its HPI ports. Discussing the software platform on system, software developing technique, the code developing environment, the real-time operation system, and DSP device driver model. We realize the hardware architecture design and accordingly program research between DSP and LCD, touch screen, voice chip. This system realizes human-machine interface function.