有几个问题麻烦大家了，c转汇编

2009-12-28 12:55:19 167 阅读 AI 写同款 · GEO 优化AI 选题数据监测一键分发 ›

实践！C语言是怎么变成汇编的在大学计算机组成原理一课中学习各种汇编语言跟C语言的关系，同时在单片机接口技术中也学习了C51的汇编语言，在一些MCU调试中也看到了反汇编的内容。但是从来没亲自实践一下C语言是怎么变成汇编的过程《Linux内核分析》MOOC课程http://mooc.study.163.com/course/USTC-1000029000 ” 阅读详情

中午我大二学姐给了我几题她们老师布置点题目，希望我帮忙做一下，是单片机点题目，也就是给电路图和C语言代码，要求把C语言代码改成汇编码，因为明天就要交，我也不敢保证今晚我就可以弄出来（本人大一，自学了单片机，底子不牢固啊）

直接来了句：“明天交不了，单片机就挂科了。” 搞得我都没话说了

所以把题目发出来，大家有会点看看能不能帮个忙，先行谢过啦

其实我看了下，都是一本书上的题，叫《单片机C语言程序设计实训100例——基于8051+Proteus仿真》，这本书好像还挺有名的

第一题：是关于 INT0及INT1中断计数的题目



#include <reg51.h>

#define uchar unsigned char

#define uint unsigned int



sbit k3 = P3^4;

sbit k4 = P3^5;



uchar code DSY_CODE[]=

{

 	0xc0,0xf9,0xa4,0xb0,0x99,0x92,0x82,0xf8,0x80,0x90,0xff

};



uchar code Scan_BITs[]=

{

  	0x20,0x10,0x08,0x04,0x02,0x01

};



uchar data Buffer_Counts[]={0,0,0,0,0,0};

uint Count_A=0;

uint Count_B=0;



void DelayMS(uint x)

{

 	uchar t;

	while(x--)

	{

	 	for(t=0;t<120;t++);

	}

}



void Show_Counts()

{

 	uint i;

	Buffer_Counts[2] = Count_A / 100;

	Buffer_Counts[1] = Count_A % 100 /10;

	Buffer_Counts[0] = Count_A % 10;	

	if(Buffer_Counts[2]==0)

	{

	 	Buffer_Counts[2] = 0x0a;

		if(Buffer_Counts[1]==0)

		{

		 	Buffer_Counts[1]=0x0a;

		}

	}



	Buffer_Counts[5] = Count_B / 100;

	Buffer_Counts[4] = Count_B % 100 /10;

	Buffer_Counts[3] = Count_B % 10;	

	if(Buffer_Counts[5]==0)

	{

	 	Buffer_Counts[5] = 0x0a;

		if(Buffer_Counts[4]==0)

		{

		 	Buffer_Counts[4]=0x0a;

		}

	}

	for(i=0;i<6;i++)

	{

	 	P2 = Scan_BITs[i];

		P1 = DSY_CODE[Buffer_Counts[i]];

		DelayMS(1);

	}

}



void main()

{

 	IT0 = 1;

	IT1 = 1;

	PX0 = 1;

	IE  = 0x85;

	while(1)

	{

	 	if(k3 == 0) Count_A = 0;

		if(k4 == 0) Count_B = 0;

		Show_Counts();

	}

}



void EX_INT0() interrupt 0

{

 	Count_A++;

}



void EX_INT1() interrupt 2

{

 	Count_B++;

}

第二题：是关于按键看门狗的



/***************   writer:shopping.w   ******************/

#include <reg52.h>

#define uchar unsigned char

#define uint unsigned int



sfr WDRST = 0xA6;

sbit LED1 = P0^0;

sbit LED2 = P0^1;

sbit K1   = P1^4;



void DelayMS(uint ms)

{

 	uchar i;

	while(ms--)

	{

	 	for(i=0;i<120;i++);

	}

}



void main()

{

 	LED1 = 0;

	LED2 = 1;

	DelayMS(2000);

	TMOD = 0x01;

	TH0  = -16000/256;

	TL0  = -16000%256;

	IE   = 0x82;

	WDRST = 0x1E;

	WDRST = 0xE1;

	while(1)

	{

	 	if(K1==0)

		{

		 	TR0 = 0;

			LED1 = 1;

			LED2 = ~LED2;

			DelayMS(200);

		}

	}

}



void Timer0() interrupt 1

{

 	TH0  = -16000/256;

	TL0  = -16000%256;

	WDRST = 0x1E;

	WDRST = 0xE1;	

}

第三题：是关于74HC595串入并出芯片应用



/***************   writer:shopping.w   ******************/

#include <reg52.h>

#include <intrins.h>

#define uint unsigned int

#define uchar unsigned char



sbit SH_CP = P2^0;

sbit DS    = P2^1;

sbit ST_CP = P2^2;

uchar temp;

uchar code DSY_CODE[]=

{

 	0xc0,0xf9,0xa4,0xb0,0x99,0x92,0x82,0xf8,0x80,0x90	

};



void Delay(uint x)

{

 	uchar i;

	while(x--)

	{

	 	for(i=0;i<120;i++);

	}

}



void In_595()

{

 	uchar i;

	for(i=0;i<8;i++)

	{

	 	temp <<= 1;

		DS   = CY;

		SH_CP = 1;

		_nop_();

		_nop_();

		SH_CP = 0;

	}

}



void Out_595()

{

 	ST_CP = 0;

	_nop_();

	ST_CP = 1;

	_nop_();

	ST_CP = 0;

}



void main()

{

 	uchar i;

	while(1)

	{

	 	for(i=0;i<10;i++)

		{

		 	temp = DSY_CODE[i];

			In_595();

			Out_595();

			Delay(200);

		}

	}

}