c语言程序问题

eeleader

c语言程序问题 [复制链接]

#include<reg52.h>
#define uchar unsigned char
#define uint unsigned int
sbit lcden=P2^7;
sbit lcdrs=P2^6;
sbit lcdrw=P3^6;
uchar count,shi,fen ,miao;
uchar code table[]="   2009-5-16";
uchar code table1[]="   00:00:00";
void delay(uint z)
{
  uint x,y;
  for(x=z;x>0;x--)
    for(y=110;y>0;y--);
}
void write_sfm(uchar add,uchar date)
{
  uchar ge, shi ;
  shi=date/10;
  ge=date%10; 
  write_com(0x80+0x40+add);
  write_data(0x30+shi);
  write_data(0x30+ge); 
}

void write_com(uchar com)
{
  lcdrs=0;
  lcden=0;
  delay(5);
  P0=com;
  delay(5);
  lcden=1;
  delay(5);
  lcden=0;
}
void write_data(uchar date)
{
  lcdrs=1;
  lcden=0;
  delay(5);
  P0=date;
  delay(5);
  lcden=1;
  delay(5);
  lcden=0;
}
void init()
{
 lcdrw=0;
 write_com(0x38);
 write_com(0x0c);
 write_com(0x06);
 write_com(0x01);
 write_com (0x80);
 TMOD=0X01;
 TH0=(65535-50000)/256;
 TL0=(65535-50000)%256;
 EA=1;
 ET0=1;
 TR0=1;
}
main()
 {
  uchar num;
  init();
  for(num=0;num<12;num++)
    {
  write_data(table[num]);
  delay(5);
 
  }
  write_com(0x80+0x40);
  for(num=0;num<11;num++)
    {
  write_data(table1[num]);
  delay(5);
 
 }
  while(1)
 { 
  if(count==20)
  {
    miao++;
    if(miao==60)
   {
      miao==0;
    fen++;
      if(fen==60)
     {fen=0;
    shi++;
    if(shi==24)
     {
      shi=0;
     }
     }
      }
  write_sfm(10,miao);

  }
 
 } 
}
void time0() interrupt 1
{
 TH0=(65535-50000)/256;
 TL0=(65535-50000)%256;
 count++;

 

 

}keil调试后,出现 warning C206: 'write_com': missing function-prototype。


  write_com(0x80+0x40+add);这句有何错

David_Lee

函数顺序混乱，在前面将全部函数都声明一遍即可。
void delay(uint z);
void write_sfm(uchar add,uchar date);
void write_com(uchar com);
void write_data(uchar date)                ;
void init();


下面miao==0;没有意义，应为miao=0;

if(miao==60)
{
miao==0;
fen++;