基于ARM处理器和CAN总线的电子结算终端设计

Design of electronic settlement terminal based on ARM processor and CAN bus

为了使农副产品电子交易系统满足交易管理、资金结算及市场各项费用的收缴,同时最大限度的提高交易的效率,提出一种新的数字交易终端,它是以ARM7处理器LPC2292为核心,分别采用SJAI000和PCA82C251作为CAN协议控制器和与物理总线之间的接口,移植了嵌入式实时操作系统μC/OS-Ⅱ来管理不同的任务模块,提高了系统的实时性及可靠性。经现场检验和运行,系统具有良好的实用性,可用于诸多电子结算领域。

In order to meet the needs of the transaction management, financial settlement and collection of market fees in electronic settlement system, and improve the efficiency of transactions, this paper presents a new digital transaction terminal which uses the ARM7 processor LPC2292 as the core and takes the SJAI000 and PCA82C251 as the interface between CAN protocol controller and the physical bus. At the same time, it transplants the real-time embedded operating system μC/OS-Ⅱto manage the different tasks module, which improves real-time performance and reliability of the system. The actual test and operation show that the system has good practicability, and can be used in many electronic settlement field.