nrf905开发板程序调控，按键控制灯亮。-nrf905 open development cheng xu,an jian contul deng light.

程序说明：通过4个按键、2个外部中断和一个定时器控制步进电机的 启动/停止/正转/反转/加速/减速 -Program Descr iption: Through four buttons, two external interrupts and a timer to control the stepper motor Start/stop/forward/reverse/acceleration/deceleration

ds1302时钟数码管显示时分秒，有按键进行控制，对时分秒进行加1-Ds1302 clock minutes when the digital tube display, with keys to control, to add 1 minutes for fashion