key.c

来自「KIT RTC按键设置闹钟程序!」· C语言 代码 · 共 62 行

	 
#include <lpc214x.h>	 
	 
#include  "code.h"


#define  fun   13
#define  add   15
#define  dec   7
#define  ok    6


	 
 unsigned char   Scan_Key(void)
{
	unsigned int k;
	unsigned char key;

	key=0;

	k=IOPIN0;
	if((k&1<<fun)==0)key=fun;
//	key=key<<1;
	if((k&1<<add)==0)key=add;
//	key=key<<1;
	if((k&1<<dec)==0)key=dec;
//	key=key<<1;
	if((k&1<<ok)==0)key=ok;
/*	switch(key)
	{
	case 0x00:
		i=0; 
		break;
	case 0x08:
		i=4; 
		break;
	
	case 0x04:
		i=3; 
		break;
	
	case 0x02:
		i=2; 
		break;
	
	case 0x01:
		i=1; 
		break;

	case 0x0F:	  //复合键
		i=0XF; 
		break;
	
	case 0x0E:
		i=0X0E; 
		break;
	default:
		i=0;
		break;
	}			  */
	return key;
}