Wireless Remote Monitor System Based On DM642 And CDMA

This thesis mainly introduces the design and realization of a wireless remote monitor system based on TMS320DM642 and CDMA wireless data modem. In order to maximize the re-use of device driver's code, a general method used for developing device driver is introduced taking the example of video decode TVP5150A and a concept is put forward that driver can be divided into two layers: class/mini driver denoting driver's upper layer and lower layer, respectively The network connecting program for CDMA modem and the data communication program need to be developed for transmitting the image compressed in MPEG-4 standard and field instrument's operating data to the remote monitor, and the data communication program is based on the protocol defined by the developers. Design and realization of wireless video's transferring by combining EDMA and MCBSP to connect to CDMA modem is introduced, in which EDMA's property: transferring data in high speed and efficiency and working in background without CPU's intervention plays an important role. In addition, PING-PONG buffering and EDMA transfer interrupt is used to realize the EDMA's continuous operation. Secondly bootloder is needed to be developed for an embedded system based on TMS320DM642, because it could only boot lk bytes code by chip-on bootloader following the release of/RESET while the CPU is stalled.The last part gives the a conclusion and describes the future of embedded systems based on combination of TMS320DM642 and wireless communication technology.