新写的LCD1602源码 LCD1602驱动 可以让字符惑数字在屏幕上跑的函数 函数结构清析，注释恰当，并在使用正常。-Written LCD1602 new source LCD1602 driver can confuse the number of characters on the screen to run the function function analysis of the structure-ching, notes, appropriate and in nor