/********************************************************************************
;*??標題:??xl系列單片機實驗儀演示程序PWM?控制?LED?燈漸亮漸滅程序????????????????*
;*??文件:????????????????????????????????????????????????????????		*
;*??日期:??2006-1-5?????????????????????????????????????????????????????????????*
;*??版本:??3.0?（試驗通過版）可用xl600-xl1000單片機綜合試驗儀試驗???????????????*
;*??郵箱:??sxj1974@163.com??????????????????????????????????????????????????????*
;*??網站：?http://www.51c51.com????www.8951.com?????????????????????????????????*
;********************************************************************************
;?PWM?控制?LED?燈漸亮漸滅程序???????????????????????????????????????????????????*
;?利用定時器控制產生占空比可變的?PWM?波?????????????????????????????????????????*
;?按K1，PWM值增加，則占空比減小LED?燈漸暗。????????????????????????????????????*
;?按K2，PWM值減小，則占空比增加LED?燈漸亮。????????????????????????????????????*
;當PWM值增加到最大值或減小到最小值時，蜂鳴器將報警??????????????????????????????*
;資源：p0口8路指示燈。p1.4p1.5亮度控制按鍵（端口按鍵）p3.7小喇叭報警??????????*
;********************************************************************************
;*?【版權】?Copyright（C）深圳市學林電子有限公司?www.51c51.com????????????????????*
;*?【聲明】?此程序僅用于學習與參考，引用請注明版權和作者信息！??????????????????*
;*??【技術支持】請訪問http://www.51c51.com/bbs/index.asp??官方論壇??????????????*
;********************************************************************************/
#include
#include
sbit??K1?=P1^4?;???????????	//PWM值增加鍵
sbit??K2?=P1^5?;???????????	//PWM值減少鍵
sbit??BEEP?=P3^7?;?????????	//蜂鳴器
unsigned?char?PWM=0x7f?;???	//賦初值
void?Beep（）;
void?delayms（unsigned?char?ms）;
void?delay（unsigned?char?t）;
char?code?SST516[3]?_at_?0x003b;
/*********************************************************/
void?main（）
{???
????P1=0xff;
????TMOD=0x21?;
	TH0=0xfc?;???????????	//1ms延時常數
????TL0=0x66?;???????????	//頻率調節
????TH1=PWM?;????????????	//脈寬調節
????TL1=0?;
	EA=1;
	ET0=1;
	ET1=1;???
????TR0=1?;
???while（1）
???{
	do{
	????if（PWM!=0xff）
		??{PWM++?;delayms（10）;}
????????else?Beep（）?;?
	??}
????while（K1==0）;

	do{
??????if（PWM!=0x02）
	????{PWM--?;delayms（10）;}
??????else?Beep（）?;?
	??}
????while（K2==0）;
??}
}
/*********************************************************/
//?定時器0中斷服務程序??（頻率）
/*********************************************************/
void?timer0（）?interrupt?1?
{??
????TR1=0?;
????TH0=0xfc?;
????TL0=0x66?;
????TH1=PWM?;
????TR1=1?;
????P0=0x00?;??????		//啟動輸出
}
/*********************************************************/
//?定時器1中斷服務程序?（脈寬）
/*********************************************************/
void?timer1（）?interrupt?3?
{?
????TR1=0?;
????P0=0xff?;?????		//結束輸出
}
/*********************************************************/
//蜂鳴器子程序
/*********************************************************/
void?Beep（）?????
??{
????unsigned?char?i??;
????for?（i=0??;i<100??;i++）
??????{
????????delay（100）??;
????????BEEP=!BEEP??;????????????//Beep取反
??????}?
????BEEP=1??;????????????????????//關閉蜂鳴器
	delayms（100）;
?

?屬性????????????大小?????日期????時間???名稱
-----------?---------??----------?-----??----

?????文件???????3817??2008-11-28?11:23??8路跑燈\PMW亮度控制\C語言\LEDPMW.c

?????文件????????969??2008-11-28?11:23??8路跑燈\PMW亮度控制\C語言\LEDPMW.hex

?????文件?????148887??2006-10-25?18:02??8路跑燈\PMW亮度控制\LEDPMW.JPG

????..A.SH.??????5120??2008-11-28?10:46??8路跑燈\PMW亮度控制\Thumbs.db

?????文件???????4888??2008-11-28?10:48??8路跑燈\PMW亮度控制\匯編\XLLEDKZ.asm

?????文件????????424??2008-11-28?10:48??8路跑燈\PMW亮度控制\匯編\XLLEDKZ.HEX

?????文件???????1493??2008-11-28?11:15??8路跑燈\三路跑馬燈\38LED.asm

?????文件????????110??2008-11-28?11:15??8路跑燈\三路跑馬燈\38LED.hex

?????文件???????1765??2008-11-28?11:18??8路跑燈\中斷方式閃爍\INT1.asm

?????文件????????172??2008-11-28?11:18??8路跑燈\中斷方式閃爍\INT1.hex

?????文件???????1615??2008-11-28?10:58??8路跑燈\二進制跑馬燈\28LED.asm

?????文件????????100??2008-11-28?10:58??8路跑燈\二進制跑馬燈\28LED.hex

?????文件???????1634??2008-11-28?11:19??8路跑燈\左右跑馬燈\8LED.asm

?????文件????????141??2008-11-28?11:19??8路跑燈\左右跑馬燈\8LED.hex

?????文件???????2028??2008-12-05?10:17??8路跑燈\報警跑馬燈\INT8LED.ASM

?????文件????????204??2008-12-05?10:17??8路跑燈\報警跑馬燈\INT8LED.hex

?????文件???????1455??2010-03-20?19:14??8路跑燈\流水燈\P1LED.c

?????文件????????220??2008-12-05?10:35??8路跑燈\流水燈\P1LED.hex

?????文件???????1516??2008-11-28?11:16??8路跑燈\移位跑馬燈\18LED.asm

?????文件????????143??2008-11-28?11:16??8路跑燈\移位跑馬燈\18LED.hex

?????文件???????2812??2008-11-28?11:33??8路跑燈\紅綠燈控制\c語言\honglv.c

?????文件????????406??2008-11-28?11:33??8路跑燈\紅綠燈控制\c語言\honglv.hex

?????文件???????4026??2008-11-28?11:02??8路跑燈\紅綠燈控制\匯編\honglv.asm

?????文件????????339??2008-11-28?11:02??8路跑燈\紅綠燈控制\匯編\honglv.hex

?????文件???????3321??2008-11-28?11:36??8路跑燈\花樣彩燈\C語言\HYLED.c

?????文件????????883??2008-11-28?11:36??8路跑燈\花樣彩燈\C語言\HYLED.hex

?????文件???????3422??2008-11-28?11:04??8路跑燈\花樣彩燈\匯編\HYLED.asm

?????文件????????681??2008-11-28?11:05??8路跑燈\花樣彩燈\匯編\HYLED.hex

?????文件???????2528??2007-04-16?16:04??8路跑燈\說明.txt

?????文件???????3989??2008-11-28?11:07??8路跑燈\跑燈端口測試\IOTEST.asm

............此處省略41個文件信息