单片机原理与嵌入式系统的实验源代码

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#include //80C52特殊功能寄存器定义

#define LED_PORT0 P0 //用P0口驱动灯，低亮，高灭
#define LED_PORT1 P1 //用P1口驱动灯，低亮，高灭
#define LED_PORT2 P2 //用P2口驱动灯，低亮，高灭
#define LED_PORT3 P3 //用P3口驱动灯，低亮，高灭

void time(unsigned int ucMs);/* 延时单位：毫秒 */
void main(void)
{
unsigned char ucTimes;
#define DELAY_TIME 400 //延时
while(1)
{
for(ucTimes=0;ucTimes<8;ucTimes++){//循环点亮P0口灯
LED_PORT0 = LED_PORT0 - (0x80>>ucTimes);//亮灯需低电平驱动
time(200);
}
LED_PORT0=0xff;//灭P0口灯

for(ucTimes=0;ucTimes<8;ucTimes++){//循环点亮P1口灯
LED_PORT1 = LED_PORT1 - (0x80>>ucTimes);//亮灯需低电平驱动
time(200);
}
LED_PORT1=0xff;//灭P1口灯

for(ucTimes=0;ucTimes<8;ucTimes++){//循环点亮P2口灯
LED_PORT2 = LED_PORT2 - (0x80>>ucTimes);//亮灯需低电平驱动
time(200);
}
LED_PORT2=0xff;//灭P2口灯

for(ucTimes=0;ucTimes<8;ucTimes++){//循环点亮P3口灯
LED_PORT3 = LED_PORT3 - (0x80>>ucTimes);//亮灯需低电平驱动
time(200);
}
LED_PORT3=0xff;//灭P3口灯

LED_PORT3=0x00;
//然后从右往左依次点亮LED
for(ucTimes=0;ucTimes<8;ucTimes++){//循环点亮P1口灯

LED_PORT3 = LED_PORT3 - (0x01<time(200);

}
LED_PORT3=0x00;//全亮

LED_PORT3=0x00;
//然后从右往左依次点亮LED
for(ucTimes=0;ucTimes<8;ucTimes++){//循环点亮P1口灯

LED_PORT2 = LED_PORT2 - (0x01<time(200);
}
LED_PORT2=0x00;//全亮

LED_PORT3=0x00;
//然后从右往左依次点亮LED
for(ucTimes=0;ucTimes<8;ucTimes++){//循环点亮P1口灯

LED_PORT1 = LED_PORT1 - (0x01<time(200);
}
LED_PORT1=0x00;//全亮

LED_PORT3=0x00;
//然后从右往左依次点亮LED
for(ucTimes=0;ucTimes<8;ucTimes++){//循环点亮P0口灯

LED_PORT0 = LED_PORT0 - (0x01<time(200);

}
LED_PORT0=0x00;//全亮

}
}
/*********** time C **************/
void time(unsigned int ucMs)//延时单位：ms
{
#define DELAYTIMES 239
unsigned char ucCounter; // 延时设定的循环次数

while (ucMs!=0) {
for (ucCounter=0; ucCounterucMs--;
}
}