Operating lever serial port drive design method based on semaphore event under vxworks system

Abstract

The invention belongs to the technical field of vxworks systems, and particularly relates to an operating lever serial port drive design method based on a semaphore event under a vxworks system. The method comprises the following steps: reading operating lever serial port configuration information; initializing a serial port equipment use environment; analyzing the serial port data to obtain a force-sensitive adjustment coordinate sent by the operating lever; and setting a screen coordinate reporting event according to the semaphore. Compared with the prior art, the operating lever serial portdriver based on the semaphore event has the advantages that the operating lever force-sensitive coordinates are transmitted through the semaphore event according to the characteristics of a system platform and the characteristics of serial port data of operating lever equipment under the application scene that the system is vxworks. The operating lever serial port drive loading process is simplified, an operating lever moving event is converted into a semaphore event according to operating lever serial port data characteristics, and a screen coordinate interface is provided for an upper-layerapplication program.

Description

technical field [0001] The invention belongs to the technical field of the vxworks system, and in particular relates to a joystick serial port drive design method based on a semaphore event under the vxworks system. Background technique [0002] The vxwork operating system is an embedded operating system, and the use of WindML graphics library programming has become the main means of developing graphics and human-computer interaction interfaces under vxworks. The joystick is a common input device in the weapon system, and the direction control of up, down, left, and right is realized by turning the handle of the joystick at a certain angle. [0003] In order to make the joystick device can be used normally under the vxworks system as a serial device, it is necessary to solve the serial port driver problem of the joystick. At present, the mature joystick driver technology is based on windml multi-pointer implementation. The joystick device is used as the low-level input driv...

AI Technical Summary

Problems solved by technology

At present, the mature joystick driver technology is based on windml multi-pointer implementation. The joystick device is used as the low-level input driver to use the standard serial port driver of the system. The content of the driver uses the high-level input driver to simulate the message mechanism of windml to the ps / 2 mouse and to the serial port. The same driving design is performed on the joystick; however, the above method does not provide the upper-layer application with a screen coordinate interface for the joystick movement event, and also limits the type of the joystick device that the system is connected to.

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