Research And Implementation Of Wireless POS Based On STM32

In order to satisfy the increasing requirements of POS' application such as efficience?stability and low cost,and in order to follow the international footprint of POS'development such as wireless network?intergration and multi-function.,there is some researches in this project of structural design of POS ? system transplant ?embedded software design?information security algorithms of wireless network ?wireless technology of communication and interface technology of singlechip microcomputer etc.Total design of project adopts incremental model and prototype study method,so that its structure is functionally modular.embedded software design of project follows united CMSIS standards of ARM,so that its hierarchical structure is explicit and standardized.Additionaly,its code has reusability.In order to realize the POS'goals of high efficience?multi-function and low cost,“STM32+?C/OS?+ZigBee” POS structure is innovated by myself in project.In order to satisfy application requirements of flexible and convenient wireless network,a wireless network is estabulished to realize communicational data transmission among POSes by using relative technology about ZigBee such as ZigBee MAC stack in project.In order to realize read and write functions of non-touched smart card,a new device driver is designed for MF RC522 card reader of STM32 in project.In order to ensure information security of wireless ZigBee network,a feasible resolvation of information security is also proposed in project.