【精品】单片机心得.doc

【精品】单片机心得 单片机心得点灯移位和取反(管口低电平亮) 1、亮灭间隔#includevoid main()while (1)P3=0XAA; 2、交替亮灭间隔#includevoid mian()unsigned chari,j,led=0xaa;while (1)P3=led;if(led=led)led=led;for(i=200;i0;i-)for(j=200;j0;j-); 3、一个流水灯#includevoid main()unsigned charm,n;unsigned chari,j;while (1)m=1;for(n=0;n8;n+)P3=m;m=m1;for(i=0;i200;i+)for(j=0;j0;i-)for(j=200;j0;j-);main()unsigned charled=0xfe;while (1)P3=led;if(led=0xff)led=0xfe;else led=(led0;i-)for(j=200;j0;j-);void main()unsigned charled=0xfc;while (1)P3=led;if(led=0x3f)led=0xfc;else led=(led0;i-)for(j=200;j0;j-);void main()unsigned charled=0xfc;while (1)P3=led;if(led=0xff)led=0xfc;else led=(led0;i-)for(j=250;j0;j-)for(k=2;k0;k-);void main()unsigned charn;while (1)for(n=0;n0;i-)for(j=10;j0;j-);void main()unsigned charn;while (1)for(n=1;n5;n+)P0=0;P0=ledn;P2=led-bitn-1;delay();按键（对单个管口定义用sbit） 1、拨码开关控制发光二极管#includesbit SW1=P26;sbit D1=P30;void delay()unsigned chari,j;for(i=0;i200;i+)for(j=0;j200;j+);void main()while (1)if(SW1=0)delay();if(SW1=0)D1=0;else D1=1; 2、按键开关控制发光二极管#includesbit key1=P24;sbit D1=P30;void delay()unsigned chari,j;for(i=0;i200;i+)for(j=0;j200;j+);void main()if(key1=0)delay();if(key1=0)D1=D1;while(key1=0); 3、矩阵键盘翻转法#includeunsigned charled17=0x3F,0x06,0x5B,0x4F,0x66,0x6D,0x7D,0x07,0x7F,0x6F,0X77,0X7C,0X39,0X5e,0X79,0X71,0X00;unsigned charp=0;void delay()unsigned chari,j;for(i=0;i200;i+)for(j=0;j200;j+);unsigned charkey_scanf()unsigned chark=0,p1_h=0,p1_l=0;P1=0xf0;k=P1;if(k!=0xf0)delay();if(k!=0xf0)p1_h=P1;P1=0x0f;p1_l=P1;k=p1_h|p1_l;switch(k)case238:p=0;break;case237:p=1;break;case235:p=2;break;case231:p=3;break;case222:p=4;break;case221:p=5;break;case219:p=6;break;case215:p=7;break;case190:p=8;break;case189:p=9;break;case187:p=10;break;case183:p=11;break;case126:p=12;break;case125:p=13;break;case123:p=14;break;case119:p=15;break;default:break;return(p);void main()unsigned charkey=0;while (1)key=key_scanf();P0=ledkey; 4、矩阵键盘扫描法#includeunsigned charled17=0x3F,0x06,0x5B,0x4F,0x66,0x6D,0x7D,0x07,0x7F,0x6F,0X77,0X7C,0X39,0X5e,0X79,0X71,0X00;unsigned charp=0;void delay()unsigned chari,j;for(i=0;i10;i+)for(j=0;j10;j+);unsigned charkey_scanf()unsigned chark=0;P1=0XFE;k=P1;if(k!=0XFE)delay();if(k!=0XFE)switch(k)case0XEE:p=0;break;case0XDE:p=4;break;case0XBE:p=8;break;case0X7E:p=12;break;default:break;P1=0XFD;k=P1;if(k!=0XFD)delay();if(k!=0XFD)switch(k)case0XED:p=1;break;case0XDD:p=5;break;case0XBD:p=9;break;case0X7D:p=13;break;default:;break;P1=0XFB;k=P1;if(k!=0XFB)delay();if(k!=0XFB)switch(k)case0XEB:p=2;break;case0XDB:p=6;break;case0XBB:p=10;break;case0X7B:p=14;break;default:;break;P1=0XF7;k=P1;if(k!=0XF7)delay();if(k!=0XF7)switch(k)case0XE7:p=3;break;case0XD7:p=7;break;case0XB7:p=11;break;case0X77:p=15;break;default:;break;return(p);