#include?

/*?
?*?the?following?timer?interrupt?routine?increments?TimerTick?and?sets?a?global?flag?to?blink?the?LED
?*/
#define?PERIOD?????-250???????????????????//?250?clock?cycles?interrupt?period
unsigned?int??TimerTick;??????????????????//?variable?to?count?interrupts
bit???????????TimeOver;???????????????????//?flag?for?main?function?to?toggle?port?pin

void?timer0?（void）?interrupt?1?using?1{???//?Int?Vector?at?000BH?Reg?Bank?1

??TimerTick++;????????????????????????????//?increment?interrupt?counter
??if?（TimerTick?>?200）?{
????TimeOver??=?1;????????????????????????//?set?event
????TimerTick?=?0;
??}
}

/*------------------------------------------------
The?main?C?function.??Program?execution?starts
here?after?stack?initialization.
------------------------------------------------*/

void?main?（void）?{

/*?setup?the?timer?0?interrupt?*/
??TH0???=?（unsigned?char）?PERIOD;????????//?set?timer?period
??TL0???=?（unsigned?char）?PERIOD;
??TMOD?|=?TMOD?|?0x02;???????????????????//?select?mode?2
??TR0???=?1;?????????????????????????????//?start?timer?0
??ET0???=?1;?????????????????????????????//?enable?timer?0?interrupt
??EA????=?1;?????????????????????????????//?global?interrupt?enable


??while?（1）?{
????while（!TimeOver）;????????????????????//?wait?until?interrupt?service?routine?sets?flag
????P3?^=?0x10;??????????????????????????//?blink?LED?on?board
????TimeOver?=?0;
??}
}

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

?????文件???????3097??2009-05-07?14:36??C51\ASM\89c51ic2.inc

?????文件???????3097??2009-05-07?14:36??C51\ASM\89c51ix2.inc

?????文件???????2919??2009-05-07?14:36??C51\ASM\89c51RB2.inc

?????文件???????2919??2009-05-07?14:36??C51\ASM\89c51RC2.inc

?????文件???????2919??2009-05-07?14:36??C51\ASM\89c51Rx2.inc

?????文件???????9567??2009-05-07?14:36??C51\ASM\at83C5123.inc

?????文件???????3281??2009-05-07?14:36??C51\ASM\AT898252.INC

?????文件???????3551??2009-05-07?14:36??C51\ASM\at89c5114.inc

?????文件???????4054??2009-05-07?14:36??C51\ASM\at89c51cc03.inc

?????文件???????3156??2009-05-07?14:36??C51\ASM\at89c51xd2.inc

?????文件???????5812??2009-05-07?14:36??C51\ASM\AT89S53.INC

?????文件???????2403??2009-05-07?14:36??C51\ASM\AT8xc5103.inc

?????文件??????12738??2009-05-07?14:36??C51\ASM\at8xC5122.inc

?????文件???????9599??2009-05-07?14:36??C51\ASM\C8051F000.INC

?????文件???????6671??2009-05-07?14:36??C51\ASM\C8051F200.INC

?????文件??????28161??2009-10-05?17:31??C51\ASM\C8051F580.INC

?????文件???????3363??2009-05-07?14:36??C51\ASM\REG152.INC

?????文件???????3317??2009-05-07?14:36??C51\ASM\REG320.INC

?????文件???????2513??2009-05-07?14:36??C51\ASM\REG410.INC

?????文件???????2025??2009-05-07?14:36??C51\ASM\REG451.INC

?????文件???????2851??2009-05-07?14:36??C51\ASM\REG452.INC

?????文件???????1955??2009-05-07?14:36??C51\ASM\REG453.INC

?????文件???????3072??2009-05-07?14:36??C51\ASM\REG504.INC

?????文件???????3037??2009-05-07?14:36??C51\ASM\REG505C.INC

?????文件???????2668??2009-05-07?14:36??C51\ASM\REG505L.INC

?????文件???????4684??2009-05-07?14:36??C51\ASM\REG509.INC

?????文件???????1705??2009-05-07?14:36??C51\ASM\REG51.INC

?????文件???????2813??2009-05-07?14:36??C51\ASM\REG515.INC

?????文件???????2833??2009-05-07?14:36??C51\ASM\REG515A.INC

?????文件???????3216??2009-05-07?14:36??C51\ASM\REG515C.INC

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