key.c

LPC2134的bootloader , 请用ADS查看地址设定。

typedef  unsigned char uchar;
typedef  unsigned int uint;

#include "LPC2294.h"
#include "pin.h"
#include "beep.h"

uchar GetKey()
{
    if((IO0PIN & KEY_1) == 0)
    	return 0x01;
    else if((IO0PIN & KEY_2) == 0)
        return 0x02;
    else if((IO0PIN & KEY_3) == 0)
        return 0x03;
    else if((IO0PIN & KEY_4) == 0)
        return 0x04;
    else
    	return 0xff;
}