关于单片机控制LED的程序，初学者可以通过学习控制单片机的IO端口来提高对单片机的理解。希望可以帮助大家，有不之处，请多多指教。-it is about muc control LED demon,new student learn it can better to learn mcu IO,I hope it can help everyone,if you find mistake about it ,please email to me,thank you very much.