Display Driver Design Of PDA Based On Windows CE.net

Among the embedded OS, Windows CE.net is adopted in portable equipment widely because of its multiple platform support capability and easy programming method. The development of embedded product relates to many contents and writing drivers is the most important part.According to the practical project, this paper designs the display driver of vehicle navigation PDA based on Windows CE.net: The interface circuit between CPU and LCD is designed based on the characteristics of S3C2440A LCD controller; A back-light driver circuit is presented based on the performances of LCD; Pulse width modulation function of timer0 is used to control the brightness of back-light; GPE C++ classes are adopted to simplify display driver development, so developers of display drivers only have to write codes related to hardware layers; Then we analyze how to amend codes faced to different color modes.We start from the platform structure of Windows CE.net and its driver structure. And then, realize the display driver of 480×272 dots LCD according to characteristics of LTE400WQ-F02 TFT-LCD produced by Samsung. Testing results show that the display driver designed in this paper runs steadily and supports application software running.In the end, we summarize the design work of display driver in this paper, and describe the prospect to improve the display driver in the future.