关于单片机外部中断的一个小程序出错，求解
[code=C/C++][/code]
#include<reg52.h>
#include<intrins.h>
sbit beep=P2^3;
void delay()
{
unsigned char i=255,j=150;
while(i--)
while(j--);
}
void main()
{
TCON=0X01;
EX0=1;
EA=1; //IE=0x81;
unsigned char LED=0xfe;
P2=LED;
while(1)
{
delay();
LED=_cror_(LED,1);
P2=LED;
}
}
void exter0() interrupt 0
{
beep=0;
delay();
beep=1;
delay();
}
1.c(15): error C141: syntax error near 'unsigned'
1.c(15): error C202: 'LED': undefined identifier
1.c(16): error C202: 'LED': undefined identifier
1.c(20): error C202: 'LED': undefined identifier
1.c(21): error C202: 'LED': undefined identifier
Target not created
[解决办法]
你应该把定义的unsigned char LED=0xfe;这句放在main中的第一句
void main()
{ unsigned char LED=0xfe;
TCON=0X01;
EX0=1;
EA=1; //IE=0x81;
P2=LED;
while(1)
{
delay();
LED=_cror_(LED,1);
P2=LED;
}
}
[解决办法]
