15-05-2012, 11:10 AM
Data Broadcast Through Encoded Techniques For Message Display Systems
Data Broadcast Through Encoded Techniques For Message Display.pptx (Size: 233.87 KB / Downloads: 35)
This project mainly concentrates on a typical multi-CPU embedded system is characterized as follows: Because of the limit of memory space and the real time requirement, efficiency and memory usage should be fully considered when multi-CPU embedded systems (MCESs) are used. Out of consideration of function and cost, the capacity of each CPU system in a MCES differs a lot from each other. Generally speaking there will be a relatively powerful central CPU system with many terminal CPU systems which can be controlled through wireless system
For the purpose of improving the capability, large communication equipments always equip as more CPUs as possible. Each CPU is in charge of a particular function module with a self-independent embedded system. Thus, a technical support for distributing system is needed to enable processes in different function modules to coordinate with each other. According to the definition of distributed systems, application processes may run in different CPU systems. The proposed system consists of a master CPU and a RF transmitter module connected to it via UART port which transmits message to other wireless receiver modules which are placed at different places which in turn controls various devices linked to these receivers. This paper mainly discusses the message-based Wireless communication method among processes in different CPU systems.
Embedded EDA Tools:
Micro-Vision IDE, Real view C Cross Compiler, software Hardware simulators, ORCAD for schematic & PCB design and simulation, HEX converter, Atmel 89xx Flash programmer burner V3.1.
Hardware Modules:
ST-0703 Tx Board, ST-0704 Rx Board, RS232 cable, AT89S52 Microcontroller, Encoder HT640, Decoder HT648, RF Tx & Rx pairs, voltage regulator, ULN Driver, LCD, RPS, etc.