at91sam7s应用 代码说明： 1)完成基本的初始化 2)初始化PIO等 3)驱动板上的四个按键(PB1,PB2,PB3,PB4) 4)初始化DEBUG口，Usart1等 5)初始化定时器timer0,timer1等-at91sam7s application code : 1) completion of the basic initialization 2) initialization three PIO) driver board the four

通过串口通信发送系统现在时间,也可以发送想要的时间-send system time through the SCI，and also can transsfer the time you want

自动延时程序，5秒内为低电平，5秒后就自动转为高电平。便于控制-Automatic delay procedure is low within 5 seconds, 5 seconds after the automatic turn high. Easy to control