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图2锟斤拷1锟斤拷目锟斤拷锟杰菜碉拷
图2锟斤拷2 锟斤拷目选锟筋窗锟斤拷
图 2锟斤拷3 锟斤拷锟斤拷锟斤拷息锟斤拷锟斤拷
锟斤拷锟斤拷锟斤拷锟窖把憋拷锟斤拷玫锟斤拷募锟斤拷盏锟斤拷锟叫酒拷希锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷舜锟斤拷锟斤拷锌锟斤拷锟斤拷元锟斤拷锟斤拷学习实 锟斤拷澹拷锟斤拷锟斤拷锟斤拷馨汛锟斤拷锌诤锟� PC 锟斤拷锟斤拷锟叫匡拷锟斤拷锟斤拷锟矫达拷锟叫口碉拷锟斤拷锟斤拷锟斤拷锟斤拷 Windows 锟侥筹拷锟斤拷锟秸讹拷,锟斤拷锟戒波锟斤拷 锟斤拷锟斤拷为 1200锟斤拷锟斤拷锟杰匡拷锟斤拷锟斤拷停锟斤拷锟斤拷锟�“Hello World!”锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟矫伙拷锟绞碉拷锟藉，锟斤拷锟斤拷 锟斤拷锟斤拷说说 AT89c51 锟斤拷锟斤拷小锟斤拷系统锟斤拷锟斤拷锟斤拷一实锟斤拷锟斤拷锟斤拷锟斤拷证锟斤拷小锟斤拷系统锟角凤拷锟斤拷锟斤拷锟叫ｏ拷锟斤拷锟斤拷锟叫★拷锟� 系统也锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷实锟介。图 2锟斤拷4 锟斤拷锟斤拷 AT89c51 锟斤拷锟斤拷小锟斤拷系统,锟斤拷锟斤拷为锟斤拷锟斤拷锟斤拷锟斤拷锟杰匡拷锟斤拷锟斤拷 锟斤拷锟斤拷锟斤拷锟叫的ｏ拷锟斤拷锟斤拷一锟斤拷锟斤拷锟斤拷锟揭伙拷锟� LED锟斤拷锟斤拷锟斤拷锟斤拷示锟斤拷锟斤拷状态锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟杰革拷锟斤拷锟皆硷拷锟斤拷锟斤拷锟绞癸拷茫锟� 一锟斤拷实锟斤拷锟斤拷锟斤拷锟斤拷锟� 11.0592MHz 锟斤拷 12MHz,使锟斤拷前锟竭的猴拷锟斤拷锟斤拷锟杰诧拷锟斤拷锟斤拷准锟侥达拷锟叫口诧拷锟斤拷锟绞ｏ拷锟斤拷 锟斤拷锟斤拷一锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷为 1 微锟诫，锟斤拷锟斤拷锟斤拷锟斤拷确锟斤拷时锟斤拷锟斤拷锟皆硷拷锟斤拷实锟斤拷锟斤，注锟斤拷锟斤拷锟� VCC 锟斤拷+5V 锟侥ｏ拷 锟斤拷锟杰革拷锟节达拷值锟斤拷锟斤拷然锟斤拷锟金坏碉拷片锟斤拷锟斤拷太锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷 31 锟斤拷要锟接高碉拷平锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷 锟斤拷锟斤拷执锟斤拷片锟节的筹拷锟斤拷锟斤拷拥偷锟狡斤拷锟绞癸拷锟狡拷锟侥筹拷锟斤拷娲拷锟斤拷锟斤拷锟斤拷娼ㄒ伙拷锟斤拷碌锟斤拷锟侥匡拷锟轿� OneLED 锟斤拷锟斤拷证锟斤拷小锟斤拷系统锟角凤拷锟杰癸拷锟斤拷锟斤拷锟斤拷锟叫碉拷锟斤拷锟教讹拷锟斤拷锟节憋拷锟竭碉拷锟斤拷页锟斤拷锟斤拷锟斤拷锟截碉拷锟斤拷锟斤拷址锟斤拷 http://www.51hei.com 锟斤拷锟斤拷锟斤拷锟斤拷锟铰ｏ拷
#include < AT89X51.h> //预锟斤拷锟斤拷锟斤拷锟斤拷
void main(void) //锟斤拷锟斤拷锟斤拷锟斤拷
{
//锟斤拷锟角碉拷一锟斤拷注锟酵凤拷式
unsigned int a; //锟斤拷锟斤拷锟斤拷锟� a 为 int 锟斤拷锟斤拷
/* 锟斤拷锟角第讹拷锟斤拷注锟酵凤拷式
*/
do{ //do while 锟斤拷锟窖拷锟�
for (a=0; a<50000; a++); //锟斤拷锟斤拷一锟斤拷循锟斤拷 P1_0 = 0; //锟斤拷 P1.0 锟斤拷为锟酵碉拷平锟斤拷锟斤拷锟斤拷 LED for (a=0; a<50000; a++); //锟斤拷锟斤拷一锟斤拷循锟斤拷 P1_0 = 1; //锟斤拷 P1.0 锟斤拷为锟竭碉拷平锟斤拷熄锟斤拷 LED
}
while(1);
}
图 2锟斤拷4 AT89c51 锟斤拷小锟斤拷系统
锟斤拷锟斤拷锟饺斤拷锟斤拷 KEIL C 锟斤拷锟斤拷锟斤拷锟斤拷支锟街碉拷注锟斤拷锟斤拷洹Ｒ伙拷锟斤拷锟斤拷锟�“//”锟斤拷锟脚匡拷始锟斤拷锟斤拷洌拷锟斤拷锟街拷锟� 锟斤拷锟斤拷涠硷拷锟斤拷锟轿拷停锟街憋拷锟斤拷谢爻锟斤拷锟斤拷小锟斤拷锟揭伙拷锟斤拷锟斤拷锟�“/*”锟斤拷“*/”锟斤拷锟斤拷之锟节碉拷为注锟酵★拷注 锟酵诧拷锟结被 C 锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟诫。一锟斤拷 C 应锟矫筹拷锟斤拷锟斤拷应锟斤拷一锟斤拷 main 锟斤拷锟斤拷锟斤拷锟斤拷main 锟斤拷锟斤拷锟杰碉拷锟矫憋拷
锟侥癸拷锟杰猴拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟杰猴拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷 main 锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷 main 锟斤拷锟斤拷锟斤拷锟节筹拷锟斤拷锟叫碉拷锟角革拷位锟矫ｏ拷 锟斤拷锟斤拷锟饺憋拷执锟叫★拷锟斤拷锟斤拷锟斤拷学锟斤拷锟斤拷知识锟斤拷锟斤拷写锟矫碉拷 OneLED 锟斤拷锟津，诧拷锟斤拷锟斤拷锟秸碉拷锟斤拷锟斤拷锟矫碉拷锟斤拷小锟斤拷系 统锟叫★拷锟较电，锟秸匡拷始时 LED 锟角诧拷锟斤拷锟侥ｏ拷锟斤拷为锟较电复位锟斤拷锟斤拷锟叫碉拷 IO 锟节讹拷锟斤拷 1 锟斤拷锟斤拷为锟竭碉拷平锟斤拷锟斤拷 然锟斤拷锟斤拷时一锟斤拷时锟戒（for (a=0; a<50000; a++)锟斤拷锟斤拷锟斤拷锟斤拷校锟斤拷锟絃ED 锟斤拷锟斤拷锟斤拷锟斤拷时锟斤拷LED 熄锟斤拷 然锟斤拷锟斤拷锟斤拷锟斤拷锟金。碉拷一锟斤拷锟斤拷锟斤拷锟斤拷小实锟斤拷锟斤拷锟斤拷辏拷锟斤拷没锟斤拷锟斤拷锟斤拷锟斤拷效锟斤拷锟斤拷么锟斤拷锟斤拷要锟斤拷锟斤拷锟斤拷一锟铰碉拷路锟斤拷锟斤拷锟斤拷锟叫达拷牟锟斤拷锟斤拷恕锟�