2440 触摸屏驱动详解： 触摸屏驱动的实现步骤 硬件原理图分析 建立触摸屏驱动程序 在两个中断服务程序中实现触摸屏状态和坐标的转换 将驱动代码写入内核-Detailed touch screen driver 2440: touch screen driver hardware schematic of implementation steps to establish the touch screen driver in the two interrupt ser

此功能是地理坐标到平面坐标的转换功能，是难得的代码。-This function is a geographical coordinates to plane coordinate conversion function, the code is rare.

火星坐标gcj02、百度坐标bd09、WGS84坐标转换代码(Mars coordinates gcj02, Baidu coordinates bd09, WGS84 coordinate conversion code)