写双机通信的时候，遇到这种问题，怎么解决？

ID:213546 · 发表于 2017-7-7 16:38

#include<reg51.h>
void  Delay(int Time_ms);

void main(void)
{
SCON = 0x40;
TMOD = 0x20;
PCON = 0x00;
TH1 = 0xF4;
TL1 = 0xF4;
TI = 0;
TR1 = 1;

while(1)
{
SBUF = P1;
while(TI == 0);
   TI = 0;
   Delay(200);
   }
return;
}

void Delay(int Time_ms)
{
int i;
unsigned char j;
for(i=0;i<Time_ms;i++)
{
   for(j=0;j<150;j++)
   {
   }
}
}

compiling LYFS.c...
linking...
*** ERROR L104: MULTIPLE PUBLIC DEFINITIONS
SYMBOL:  _DELAY
MODULE:  LYFS.obj (LYFS)
*** ERROR L104: MULTIPLE PUBLIC DEFINITIONS
SYMBOL:  MAIN
MODULE:  LYFS.obj (LYFS)
*** WARNING L16: UNCALLED SEGMENT, IGNORED FOR OVERLAY PROCESS
SEGMENT: ?PR?_DELAY?LANYA
*** WARNING L16: UNCALLED SEGMENT, IGNORED FOR OVERLAY PROCESS
SEGMENT: ?PR?MAIN?LYFS
*** ERROR L118: REFERENCE MADE TO ERRONEOUS EXTERNAL
SYMBOL:  MAIN
MODULE:  C:\KEIL\C51\LIB\C51S.LIB (?C_INIT)
ADDRESS: 0033H
Program Size: data=10.0 xdata=0 code=327
目标未创建

ID:210756 · 发表于 2017-7-7 20:13

你这个没错误啊

ID:213173 · 发表于 2017-7-8 08:30

发送变化数据，没有发现错误。
#include<reg51.h>
void  Delay(int Time_ms);

void main(void)
{
unsigned char x;
TMOD = 0x20;
PCON = 0x00;
TH1 = 0xF4;
TL1 = 0xF4;
SCON = 0x40;
TI = 0;
TR1 = 1;
x=0xff;

while(1)
{
SBUF = P1;
while(TI == 0);
TI = 0;
Delay(2000);
x--;
if(x==0x00)
x=0xff;
P1=x;
}
return;
}

void Delay(int Time_ms)
{
int i;
unsigned char j;
for(i=0;i<Time_ms;i++)
for(j=0;j<150;j++);
}

ID:97438 · 发表于 2017-7-11 11:28

main函数还return个毛线。。。

ID:218893 · 发表于 2017-7-11 19:07

你定义了两个delay函数.重复定义!

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