单片机部分程序--单片机的C语言应用程序设计.doc

················老师给的程序··················

第一章

1-32

ORG0000H

LJMPSTART

ORG0100H

START:MOVR2,#00H

MOVR1,#20H

LOOP:MOVA,@R1

JZZERO

INCR1

CJNER1,#51H,OVER

JMPLOOP

ZERO:INCR2

MOV51H,R2

JMPLOOP

OVER:SJMP$

END

1-34

ORG0000H

LJMPSTART

ORG0100H

START:MOVDPTR,#1FFFH

LOOP:INCDPTR

MOVXA,@DPTR

PUSHDPH

PUSHACC

MOVA,DPH

ADDA,#10H

MOVDPH,A

POPACC

MOVX@DPTR,A

POPDPH

MOVA,DPH

CJNEA,#21H,LOOP

END

AD转换

ADC0809

#includeabsacc.h//绝对地址访问头文件

#includereg51.h

#defineIN0XBYTE[0x7FF8]//通道0的地址

sbitad_busy=P3^3;//AD转换结束标志

voidad0809(unsignedchar*x);//AD转换函数,变量x为AD转换结果的指针

unsignedcharADC0809(unsignedintnADAddrBase,unsignedcharchChannel);

main()

{

unsignedintdatai;

staticunsignedchardataad[8];

//ad0809(ad);

for(i=0;i8;i++)

{

ad[i]=ADC0809(0x7FF8,i);

}

}

voidad0809(unsignedchar*x)

{

unsignedchari,j;

// unsignedcharadstate;

unsignedcharxdata*ad_adr;//指向外部存储空间的指针

ad_adr=IN0;//获得AD转换通道0的地址

for(i=0;i8;i++)

{

*ad_adr=0;//启动AD转换

for(j=0;j2;j++);//延时，EOC在AD转换启动后10us行变成低电平

//while((adstate=P30x08)==0x00);//等待AD转换结束

while(ad_busy==0);//等待AD转换结束,AD转换结束后EOC变高电平

*x=*ad_adr;

ad_adr++;

x++;

}

}

//返回值为无符号字符型，变量分别为AD转换器的基地址，AD转换器的模拟通道

unsignedcharADC0809(unsignedintnADAddrBase,unsignedcharchChannel)

{

unsignedchari,chADResult;

unsignedcharxdata*pADChannel;

pADChannel=nADAddrBase+chChannel;

*pADChannel=chChannel;//启动AD转换

for(i=0;i2;i++);//延时，EOC在AD转换启动后10us行变成低电平

while(ad_busy==0);//等待AD转换结束

chADResul