基于STR912的GPIO程序,本示例程序主要为测试GPIO功能。当程序运行时，LCD屏上会显示: STR91x DEMO GPIO TEST 并能通过按键K5(中断方式实现)轮流闪动L2、L3、L4、L5。-The STR912-based GPIO procedures, this example program to test the main GPIO function. When the program runs, LCD screen will display: STR9