The Design Of Main Control Module Used In Locomotive Communication Platform

A new Controller of Wireless Communication Equipment is introduced in the paper, which is used on the locomotive. The controller is designed for a new railway communication network, called GSM-R (GSM for Railway). The cell controls external equipments such as GSMR, GPRS, GPS, LOCATIONS and Man-Machine interface (MMI) via serials. It's a full function embedded system applied in the controller. The hardware uses the CPU of Intel PXA270, witch under the frame of XScale. We expand 32M NOR Flash for deposit embedded operation system, some application and users' files. 64M SDRAM is also supplied in the system. We have expanded some interfaces supported by PXA270, such as LCD, AUDIO, USB1.1 (double), and ETHERNET. The real-time operation system (RTOS) we choose QNX6.3. The work of BSP cutting and OS expanding which accomplishes the hardware initialization and driver management is build on the develop environment of QNX MOMENTICS 6.3. For the main controller is a multitask system, we do a deep job in the interrupt priority program design, and make it more reasonable. Because there are so many external modules and the limited communication interface PXA270 supplies, we take our emphasis on the serial expanding, which is detailed discussed in the paper. The controller has been developed completely; some of modules are being tested. In the last of the article, the work of testing is described.