#include?
#include?“serial8250.h“

extern?void?delay（int?n）;

main（?void?）
{??
??asm（“cli“）;?//disable?all?interrupts?????//關總中斷
??PORTD?=0xff;
??DDRB=0xff;
??DDRC=0x00;
??DDRD=0xf2;??
??MCUCR?=?0x0C;???????????????????????//上升沿觸發?
??GICR?=?0x80;??????????????????????????//使能?外部中斷1
??GIFR_INTF1?=?1;?????????????????????//清除?外部中斷1?標志位
??asm（“sei“）;?//re-enable?interrupts????//開總中斷
??serial8250_init（）;
??serial8250_writestring（“Greetings!\r\n“）;
??serial8250_writestring（“This?is?a?test?program?of?8250A?serial?port!\r\n“）;
	while（1）
		{
		delay（200）;
		};
}

#pragma?vector?=?INT1_vect????????????//外部中斷0入口地址?
__interrupt?void?ex_int1（void）?
{?
	PORTB_Bit3?=?~PORTB_Bit3;?//每次進入中斷讓一個led?由亮變滅，由滅變亮
	ret?=?Serial8250_ReadReg（IIR）;
	if（ret?==?1）
		{
		?return;
		}
	if（ret?==?2）
		{
		?if（tx_head?!=?tx_tail）
		?{
			serial8250_writechar（Txbuf[tx_tail]）;
			tx_tail?=?（tx_tail?+?1）&BUF_MASK;
		?}
		else
		?{
			Serial8250_WriteReg（IERIER_CONFIG1）

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

?????文件??????86802??2012-04-21?11:23??8250.DSN

?????文件??????35914??2011-10-21?17:26??code\Backup?of?Serial8250.ewd

?????文件??????51337??2011-09-27?14:01??code\Backup?of?Serial8250.ewp

?????文件??????18414??2012-04-12?21:17??code\Debug\Exe\Serial8250.d90

?????文件??????15910??2011-12-02?16:18??code\Debug\Exe\Serial8250.db9

?????文件??????18734??2012-04-12?21:17??code\Debug\Exe\Serial8250.dbg

?????文件???????1685??2011-12-02?15:37??code\Debug\Exe\Serial8250.hex

?????文件??????16243??2012-04-12?21:15??code\Debug\List\main.lst

?????文件??????20571??2012-04-12?21:17??code\Debug\List\serial8250.lst

?????文件??????19814??2012-04-12?21:15??code\Debug\Obj\main.r90

?????文件????????156??2012-04-21?11:32??code\Debug\Obj\Serial8250.pbd

?????文件??????25735??2012-04-12?21:17??code\Debug\Obj\serial8250.r90

?????文件???????1230??2012-04-12?21:15??code\main.c

?????文件???????1772??2012-04-12?21:17??code\serial8250.c

?????文件???????3077??2012-04-21?11:41??code\Serial8250.dep

?????文件??????36466??2011-12-02?15:37??code\Serial8250.ewd

?????文件??????50893??2011-12-02?16:18??code\Serial8250.ewp

?????文件????????164??2011-09-27?10:34??code\Serial8250.eww

?????文件???????2273??2012-04-12?19:02??code\serial8250.h

?????文件???????4096??2011-09-27?11:03??code\Serial8250.IAB

?????文件????????368??2011-09-27?11:03??code\Serial8250.IAD

?????文件???????4096??2011-09-27?11:03??code\Serial8250.IMB

?????文件????????368??2011-09-27?11:03??code\Serial8250.IMD

?????文件?????????12??2012-04-12?21:27??code\Serial8250.PFI

?????文件????????776??2012-04-12?21:27??code\Serial8250.PO

?????文件???????1448??2011-09-27?11:04??code\Serial8250.PR

?????文件???????6584??2011-09-27?11:04??code\Serial8250.PRI

?????文件??????18056??2012-04-12?21:27??code\Serial8250.PS

?????文件????????142??2012-04-11?20:20??code\Serial8250.SearchResults

?????文件??????22082??2012-04-12?21:27??code\Serial8250.WK3

............此處省略13個文件信息