7寸液晶屏绘图程序，使用触摸屏绘图。芯片使用的是Cortex-m3 LM3S811芯片。可选绘图背景颜色，画笔颜色，画笔粗细，有橡皮，刷屏等功能-7-inch LCD screen drawing program, the use of touch-screen drawing. The chip used in the Cortex-m3 LM3S811 chip. Optional graphics background color, pen color, pen thickness, th