| Train Control and Monitor System of the display unit is the main equipment for man-machine interaction between the train crew and train equipment. In practice, train display unit will train’s running safety information, fault information and device status information to reflect to the driver in order to operate efficiently guide drivers to ensure road safety and reduce the impact of the train failure. With the development of train control and monitor system functional requirements, requirements for the display unit is getting higher and higher, high-performance embedded processors, high-capacity flash memory, touch screen, high-performance graphics cards and other hardware components gradually applied to the display unit products. In the display unit software applications, using embedded operating system makes task management, device management, file management and memory management of these complex work to be done embedded operating system, and application software unit can display the main work concentrated to a specific device status display and control functions.The main content of this paper is to study the embedded Intel Atom processor embedded Linux operating system, Qt graphics library and other popular embedded development technology to the train control and monitor system of the display unit. Design and Implementation of the display unit mainly includes three parts:the hardware platform, operating system porting and driver development, application development based on Qt. Hardware platforms using Intel Atom processor, it has a rich peripheral interface devices, helps to quickly build the hardware platform. Operating system uses Linux. By Linux package management tools make it easy for us to download and compile build embedded Linux systems required for a variety of software. Applications using the Qt/E graphics development framework, first established Qt/E of cross-development environment on the PC, and using QT Creator development environment for application interface development.The final completion of a task to meet the railway locomotive, subway, light rail vehicle cab long-term work required working environment, to meet the railway standards, with high reliability and stability of the train display unit. |
