key.h

51单片机控制产生4路标准舵机PWM（周期20ms

/*--------------------------------------------------------------------------
KEY.H

KEY access macros and functions for the DE51-S by Windsun
--------------------------------------------------------------------------*/
#ifndef __KEY_H__
#define __KEY_H__

#define SW1_Pressed	((P1 & 0x01) == 0)
#define SW2_Pressed	((P1 & 0x02) == 0)
#define SW3_Pressed	((P1 & 0x04) == 0)
#define SW4_Pressed	((P1 & 0x08) == 0)

#endif