#include
#include“BoardConfig.h“
#define?uchar?unsigned?char
#define?uint?unsigned?int
#define?keyin????（P1IN?&?0x0f）
uchar?step?=0xff;
?void?delay（void）;
??uchar?tempkeyval;
void?main（?void?）
{
??
???uchar?i;
??
??//?Stop?watchdog?timer?to?prevent?time?out?reset
??WDTCTL?=?WDTPW?+?WDTHOLD;
??BoardConfig（0xb8）;
??P1DIR=0xf0;
??P1OUT=0;
?
???while（1）
???{
?????if（keyin?!=?0x0f）???????//如果有鍵被按下
????????{
????????????delay（）;????????????//延時消抖
????????????if（keyin?!=?0x0f）???//再次檢測按鍵狀態
????????????{
????????????????temp=keyin;
???????????????while（keyin?!=?0x0f）;???//等待按鍵被放開
?????????????if（temp!=0x0f）
?????????????{?
??????????????????switch（temp）????//轉換鍵值????
????????????????{
????????????????case?0x0e:
????????????????????????????keyval?=?1;