display.c

QH_MCU_V1.1单片机C源码. 内含实验程序 这是修改版.

#include <reg51.h>
#include <rtx51tny.h>

#define uchar unsigned char
#define display 2
extern uchar key;

unsigned char	LedCode[]={0x3F,0x06,0x5B,0x4F,0x66,0x6D,0x7D,0x07,0x7F,0x6F,0x77,0x7C,0x39,0X5E,0x79,0x71};

void display_7seg(void) _task_ display
{
  while(1)
  {
 //   os_wait(K_TMO+K_SIG,1,0);
    P2 = 0x00;
	P0 = 0x00;
    if(key <= 9)
	{
       P2=0x10;
	   P0 = 0x1f;
	   P2 = 0x00;
	   P0 = 0x00;
	   P2 = 0x80;
	   P0 = LedCode[0];
	 }
	 else
	 {
       P2 = 0x10;
	   P0 = 0x1f;
	   P2 = 0x00;
	   P0 = 0x00;
	   P2 = 0x80;
	   P0 = LedCode[1];
	 }
     os_wait(K_IVL,1,0);
	 P2 = 0x00;
	 P2 = 0x10;
	 P0 = 0x0f;
     P2 = 0x00;
	 P0 = 0x00;
	 P2 = 0x80;
	 switch(key)
	 {
	 case 2:
	      P0 = LedCode[2];
		  break;
	 case 3:
	      P0 = LedCode[3];
		  break;
     case 4:
	      P0 = LedCode[4];
		  break;
	 case 5:
	      P0 = LedCode[5];
		  break;
     case 6:
	      P0 = LedCode[6];
		  break;
     case 7:
	      P0 = LedCode[7];
		  break;
	 case 8:
	      P0 = LedCode[8];
		  break;
	 case 9:
	      P0 = LedCode[9];
		  break;
     case 10:
	      P0 = LedCode[0];
		  break;
	 case 11:
	      P0 = LedCode[1];
		  break;
     case 12:
	      P0 = LedCode[2];
		  break;
     case 13:
	      P0 = LedCode[3];
		  break;
	 case 14:
	      P0 = LedCode[4];
		  break;
	 case 15:
	      P0 = LedCode[5];
		  break;
     case 16:
	      P0 = LedCode[6];
		  break;
     case 17:
	      P0 = LedCode[7];
		  break;
	 default:
	      P0 = 0x3f;
		  break;
	 }
	 P2 = 0x00;
	 P0 = 0x00;
     os_wait(K_IVL,2,0);
   }
}