A Design Scheme of Logistics Re-inspection System Based on ARM-LINUX

3.2 Design of the master node software system

The master control node uses Linux as its software system platform. The structure of the software system is shown in Figure 6. The bottom layer is the device hardware. In order to use these devices, the corresponding device drivers need to be developed. Next is the Linux kernel and protocol stack, which mainly include Ethernet TCP/IP protocol stack and Socket CAN protocol stack. Linux provides a unified programming interface for application calls. In order to facilitate system development, most application software uses libraries to improve development efficiency. This system mainly deploys QT library, C library and MySQL library. The final review system application calls the kernel programming interface and various powerful libraries to realize its functions. The target board uses the ARMS3C6410 processor and Linux operating system. The two are connected through Ethernet and RS232 interfaces, and ARM-UNUX-GCC-4.3.2 is used for compilation and development. Select the bridge connection mode for the network connection between XP and Fedora9. XP, Fedora9 and the target board need to be connected in a local area network through Ethernet. U-Boot, which is in the same vein as the Linux kernel source code, is used to transplant the Bootloader and develop the Linux kernel. Finally, the application of the re-inspection system is developed. QT is a cross-platform graphical interface library that supports Linux, Windows and other systems. It can be easily applied in embedded systems. In addition, users need to design the Socket CAN system by themselves. In this study, the graphical interface of the master control node is designed using the QT graphical interface library, and the image interface is designed using the UI development tool in Qt Creator. The interface displays the cargo barcode and channel of the corresponding offline channel received through CAN. After querying the database, the queried cargo destination and the license plate of the transport vehicle are displayed. If an error occurs, a QMassageBox warning will pop up. The master control node application flow chart is shown in Figure 7.

4 Conclusion

This paper elaborates on the development of various hardware platforms and software systems of the logistics re-inspection system, and completes the construction of the cross-compilation development environment of ARM-LINUX. Practical application shows that the designed logistics re-inspection system based on ARM-LINUX can well solve the sorting errors in the logistics sorting system, which is of great practical value. Moreover, the sorting recognition used in this paper is barcode recognition technology, which can also be well expanded to other methods, such as electronic tags.