開關，接在 P2.7 與地之間。

#include

void w(unsigned char k)

{

unsigned int a; //定義變數a 為int 型別

if (k) {

while(P2_7); //沒有按就迴圈，等待按下

for (a = 0; a

while(P2_7); //沒有按就迴圈

}

else while(!P2_7); //按下就迴圈，等待鬆開

}

void main(void) //主函式名

{

while(1) {

w(1); P1_0 = 0; w(0); P1_0 = 1;

w(1); P1_1 = 0; w(0); P1_1 = 1;

w(1); P1_2 = 0; w(0); P1_2 = 1;

w(1); P1_3 = 0; w(0); P1_3 = 1;

w(1); P1_4 = 0; w(0); P1_4 = 1;

w(1); P1_5 = 0; w(0); P1_5 = 1;

w(1); P1_6 = 0; w(0); P1_6 = 1;

w(1); P1_7 = 0; w(0); P1_7 = 1;

}

}