leddisplay.c

这是一个用于视频切换的控制程序,采用AT89C51芯片,KEIL 51开发

#include "reg52.h"
#include "main.h"

extern void delay1ms(unsigned char count);
extern bit fgledflash; 
extern unsigned int ledflash_counter;


void leddisplay(unsigned char ledbuf_h,unsigned char ledbuf_l)

{
// P2=0;
 if(!fgledflash)
{
 P2=ledbuf_l & 0x0f;
 LED_L=0;
 LED_H=1;
 delay1ms(3);

 P2=ledbuf_h & 0x0f;
 LED_L=1;
 LED_H=0;
 delay1ms(3);
}
else
{
 if(ledflash_counter<150)
 {
 ledflash_counter++;
 delay1ms(3);
 LED_L=1;
 LED_H=1;
 }

 else if(150<=ledflash_counter && ledflash_counter<350)
 {
 ledflash_counter++;
 P2=ledbuf_l & 0x0f;
 LED_L=0;
 LED_H=1;
 delay1ms(3);

 P2=ledbuf_h & 0x0f;
 LED_L=1;
 LED_H=0;
 delay1ms(3);
 }

 else
 ledflash_counter=0;
 
 }
 
}