1.c(20): error C267: 'write_data': requires ANSI-style prototype
#include <AT89X51.h>bit dsinit();
void write_data();
unsigned char readdata();
sbit ds=P3^3;
unsigned int i;
unsigned int t1;
unsigned char t2;
unsigned char t;
int j;
unsigned char dat,rdata;
bit b;
void main()
{
while(1)
{
dsinit();
write_data(0xCC);
write_data(0x44);
dsinit();
write_data(0xCC);
write_data(0xbe);
t1=readdata();
t2=readdata();
t2=(t2<<8)|t1;
}
}
bit dsinit()
{
ds=0;
i=60;
while(i>0)i--;
ds=1;
i=4;
while(i>0)i--;
while(!ds);
i=60;
while(i>0)i--;
}
void write_data()
{
for(j=0;j>0;j--)
{
b=dat&0x01;
dat>>=1;
if(b)
{
ds=0;
i=2;
while(i>0)i--;
ds=1;
i=7;
while(i>0)i--;
}
else
{
ds=0;
i=8;
while(i>0)i--;
ds=1;
i++;i++;
}
}}
unsigned char readdata()
{
for(j=8;j>0;j--)
{
rdata>>=1;
ds=0;
i++;
ds=1;
i++;i++;
if(ds)
rdata=rdata|0x80;
i=8;
while(i>0)i--;
ds=1;
}
return rdata;
}
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