單片機定時器查詢方式例程，有一點問題，求幫助

ID:377234 · 發表于 2018-9-7 20:25

#include<reg52.h>
#define uchar unsigned char
#define uint unsigned int
#define Dig P0
sbit gA=P2^2;
sbit gB=P2^3;
sbit gC=P2^4;
uchar count,num;
uchar code table[]={
0x3f,0x06,0x5b,0x4f,
0x66,0x6d,0x7d,0x07,
0x7f,0x6f};
void main()
{

count=0;
num=0;
gA=1;gB=1;gC=1;
TMOD=0X01;
TH0=(65536-50000)/256;
TL0=(65536-50000)%256;
//EA=1;
//ET0=1;
TR0=1;
//TF0=0;
P0=table[0];
while(1)
{
      while(~TF0)
      TH0=(65536-50000)/256;
      TL0=(65536-50000)%256;
      TF0=0;
      count++;
   if(count==20)
   {
      count=0;
      num++;
      if(num==10)
         num=0;
         P0=table[num];
   }

   }
}

ID:213173 · 發表于 2018-9-7 21:01

改成這樣：
#include<reg52.h>
#define uchar unsigned char
#define uint unsigned int
#define Dig P0
sbit gA=P2^2;
sbit gB=P2^3;
sbit gC=P2^4;
uchar count,num;
uchar code table[]={
0x3f,0x06,0x5b,0x4f,
0x66,0x6d,0x7d,0x07,
0x7f,0x6f};
void main()
{
count=0;
num=0;
gA=1;gB=1;gC=1;
TMOD=0X01;
TH0=(65536-50000)/256;
TL0=(65536-50000)%256;
//EA=1;
//ET0=1;
TR0=1;
//TF0=0;
Dig=table[0];
while(1)
{
// while(!TF0)
if(TF0==1)
{
TH0=(65536-50000)/256;
TL0=(65536-50000)%256;
TF0=0;
count++;
if(count==20)
{
count=0;
num++;
if(num==10)
num=0;
Dig=table[num];
}
}
}
}

ID:377234 · 發表于 2018-9-7 22:35

謝謝指點

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單片機定時器查詢方式例程，有一點問題，求幫助