單片機(jī)獨(dú)立按鍵控制求幫助

ID:661003 · 發(fā)表于 2019-12-11 07:34

8個(gè)LED與P0口連接，可以實(shí)現(xiàn)以下功能嗎？
K1鍵流水燈交替閃爍。
K2鍵流水燈從兩邊向中間移動(dòng)閃爍。
K3鍵流水燈全部閃爍。
K4鍵流水燈從LED7到LED0流水閃爍。
#include<reg51.h>
sbit S5=P2^4;
sbit S6=P2^5;
sbit S7=P2^6;
sbit S8=P2^7;
unsigned char keyval;
void key_scan(void);
void forward(void);
void backward(void);
void Alter(void);
void blink(void);
void led_delay(void);
void delay10ms(void);
void main(void)
{
keyval=0;
      while(1)
      {
         key_scan();
         switch(keyval)
         {
            case 5:Alter();
                        break;
         case 6:forward();
                        break;
               case 7:blink();
                        break;
         case 8:backward();
                        break;
         }
      }
}
void key_scan(void)
{
P2=0xff;
      if((P2&0xf0)!=0xf0)
      {
         delay10ms();
         if(S5==0)
         keyval=5;
         if(S6==0)
         keyval=6;
         if(S7==0)
         keyval=7;
         if(S8==0)
         keyval=8;
}
}
void Alter(void)
{
P0=0xaa;
      led_delay();
      P0=0x55;
      led_delay();
}

void forward(void)
{
P0=0x7e;
      led_delay();
      P0=0xbd;
      led_delay();
      P0=0xdb;
      led_delay();
      P0=0xe7;
      led_delay();
      P0=0xe7;
      led_delay();
      P0=0xdb;
      led_delay();
      P0=0xbd;
      led_delay();
      P0=0x7e;
      led_delay();
}

void blink(void)
{
P0=0xff;
      led_delay();
      P0=0x00;
      led_delay();
}

void backward(void)
{
P0=0x7f;
      led_delay();
      P0=0xbf;
      led_delay();
      P0=0xdf;
      led_delay();
      P0=0xef;
      led_delay();
      P0=0xf7;
      led_delay();
      P0=0xfb;
      led_delay();
      P0=0xfd;
      led_delay();
      P0=0xfe;
      led_delay();
}

void led_delay(void)
{
unsigned char i,j;
      for(i=0;i<220;i++)
      for(j=0;j<220;j++);
}

void delay10ms(void)
{
unsigned char i,j;
      for(i=0;i<100;i++)
      for(j=0;j<100;j++);
}