led_1.c

用89C2051实现的软PLC。PLC程序存在24C04,用按健输入程序

#include "reg51.h"

void Show(unsigned char);
extern bit light_on;
sbit LED_CLK = P1^4;
sbit LED_DATA = P1^5;
unsigned char code LED[16] = {0x03,0x9f,0x25,0x0d,0x99,0x49,0x41,0x1f,
                              0x01,0x09,0x11,0xc1,0x63,0x85,0x61,0x71};

void Led_Show(unsigned char out_data, bit point )
{
   unsigned char temp_data;

   temp_data = out_data & 0x0f;
   temp_data = LED[temp_data];
   if (light_on == 0)
   {
      if (point == 1)
         temp_data = temp_data & 0xfe;
   }
   else 
         temp_data = 0xff;
   Show(temp_data);
   temp_data = (out_data & 0xf0) >> 4;
   temp_data = LED[temp_data];
   if (light_on == 0)
   {
      if (point == 1)
          temp_data = temp_data & 0xfe;
   }
   else 
          temp_data = 0xff;
   Show(temp_data);
}

void Show(unsigned char out_data)
{ 
   unsigned char and_data = 1;

   LED_CLK = 0;
   do { 
        if (out_data & and_data)  
		    LED_DATA = 1;
        else 
            LED_DATA = 0;
        LED_CLK = 1;
		LED_CLK = 0;
       }while(and_data = and_data << 1);
}

void On_Light(unsigned char out_data,bit b,unsigned char on_data)
{
    Show(on_data);
    Led_Show(out_data,b);
}