这是我根据别人的代码加以优化的，没有错误只是有警告linking...
*** WARNING L16: UNCALLED SEGMENT, IGNORED FOR OVERLAY PROCESS
SEGMENT: ?PR?KAISHI_KEYSCAN?1
Program Size: data=34.0 xdata=0 code=701
creating hex file from "1"...
"1" - 0 Error(s), 1 Warning(s).，求大神指教怎么改
#include <reg51.h>
#define uint unsigned int
#define uchar unsigned char
unsigned char code table[]={0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,0x7f,0x6f,0x77,0x7c,0x39,0x5e,0x79,0x71};
sbit start_stop = P3^6;
sbit reset = P3^7;
sbit key1 = P1^0;
sbit key2 = P1^1;
sbit key3 = P1^2;
sbit key4 = P1^3;
sbit key5 = P1^4;
sbit key6 = P1^5;
sbit key7 = P1^6;
sbit key8 = P1^7;
sbit state = P3^4;
sbit kaishi=P3^1;
uchar start_stop_flag = 0;
uchar key_flag = 0;
uchar reset_flag = 0;
uchar action = 0;
uchar kaishi_flag=0;//开始标志
uchar second = 20;//倒计时20秒
uchar timer0_count = 0;
uchar number = 0;
uchar number_display = 0;
/*延时函数*/
void delay(uint z)
{
uint x,y;
for(x=z;x>0;x--)
for(y=110;y>0;y--);
}
/*数码管显示驱动函数*/
void display(uchar number,uchar second)
{
uchar second_first,second_second;
second_first = second / 10;
second_second = second % 10;
P2 = 0xfe;
P0 = table[number];
delay(2);
P2 = 0xfd;
P0 = 0x40;
delay(2);
P2 = 0xfb;
P0 = table[second_first];
delay(2);
P2 = 0xf7;
P0 = table[second_second];
delay(2);
}
/*开始键扫描函数*/
void start_stop_keyscan()
{
if(start_stop == 0)
{
delay(8);
if((start_stop == 0)&&(!start_stop_flag))
{
start_stop_flag = 1;
action = 1;
TR0 = 1;
state = 0;
}
}
else
{
start_stop_flag = 0;
}
}
/*八位抢答键扫描函数*/
key_scan8()
{
if(key1 == 0)
{
delay(8);
if((key1 == 0)&&(!key_flag))
{
key_flag = 1;
number = 1;
number_display = number;
}
}
else if(key2 == 0)
{
delay(8);
if((key2 == 0)&&(!key_flag))
{
key_flag = 1;
number = 2;
number_display = number;
}
}
else if(key3 == 0)
{
delay(8);
if((key3 == 0)&&(!key_flag))
{
key_flag = 1;
number = 3;
number_display = number;
}
}
else if(key4 == 0)
{
delay(8);
if((key4 == 0)&&(!key_flag))
{
key_flag = 1;
number = 4;
number_display = number;
}
}
else if(key5 == 0)
{
delay(8);
if((key5 == 0)&&(!key_flag))
{
key_flag = 1;
number = 5;
number_display = number;
}
}
else if(key6 == 0)
{
delay(8);
if((key6 == 0)&&(!key_flag))
{
key_flag = 1;
number = 6;
number_display = number;
}
}
else if(key7 == 0)
{
delay(8);
if((key7 == 0)&&(!key_flag))
{
key_flag = 1;
number = 7;
number_display = number;
}
}
else if(key8 == 0)
{
delay(8);
if((key8 == 0)&&(!key_flag))
{
key_flag = 1;
number = 8;
number_display = number;
}
}
else
{
key_flag = 0;
number = 0;
}
if(number_display != 0)
{
return 1;
}
else
{
return 0;
}
}
/*复位键扫描函数*/
reset_keyscan()
{
if(reset == 0)
{
delay(8);
if((reset == 0)&&(!reset_flag))
{ second=20;
reset_flag = 1;
number_display = 0;
state = 1;
}
}
else
{
reset_flag = 0;
}
}
/*主持人开始函数*/
kaishi_keyscan()
{
if(kaishi == 0)
{
delay(8);
if((kaishi == 0)&&(!kaishi_flag))
{
kaishi_flag = 1;
number_display = 0;
state = 1;
}
}
else
{
kaishi_flag = 0;
}
}
/*主函数*/
void main()
{
TMOD=0x01;
TH0=0x3c;
TL0=0xb0;
EA=1;
ET0=1;
TR0=0;
while(1)
{
while((kaishi == 0)&&(!kaishi_flag))
{
start_stop_keyscan();
reset_keyscan();
while(action)
{
while(!key_scan8())
{
display(number_display,second);
if(second == 0)
{
second = 20;
break;
}
}
TR0 = 0;
second = 0;
display(number_display,second);
action = 0;
break;
}
display(number_display,second);
}
}
}
/*中断服务函数*/
void timer0() interrupt 1
{
TH0=0x3c;
TL0=0xb0;
timer0_count++;
if(timer0_count == 20)
{
timer0_count = 0;
second--;
if(second == 0)
{
TR0 = 0;
number_display = 0;
state = 1;
action = 0;
}
}
}
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