Build target 'Target 1' linking... *** WARNING L1: UNRESOLVED EXTERNAL SYMBOL SYMBOL: ?C_START MODULE: STARTUP.obj (?C_STARTUP) *** WARNING L2: REFERENCE MADE TO UNRESOLVED EXTERNAL SYMBOL: ?C_START MODULE: STARTUP.obj (?C_STARTUP) ADDRESS: 000DH Program Size: data=9.0 xdata=0 code=15 "流水等" - 0 Error(s), 2 Warning(s).
源码如下：
#include
#include
typedef unsigned int uint;
void delayms(uint xms);
sbit led1 = P1^0;
uint aa = 0;
void main(void)
{
aa = 0xfe;
while(1)
{
P1 = aa; //第一个灯亮
delayms(500);//延时0.5秒
aa = _crol_(aa,1);//将aa循环左移1位赋值给aa
}
}
void delayms(uint xms)
{
uint i,j;
for(i = xms;i > 0;i --)
for(j = 110;j > 0;j --);
}