#include?????????????/*?tcgetattr?tcsetattr?*/
#include???????????????/*?perror?printf?puts?fprintf?fputs?*/
#include??????????????/*?read?write?close?*/
#include???????????????/*?open?*/
#include??????????????/*?bzero?*/

#include?“SetupSerialPort.h“
/*?
?*?Decription?for?TIMEOUT_SEC（buflenbaud）;
?*?baud?bits?per?second?buflen?bytes?to?send.
?*?buflen*20?（20?means?sending?an?octect-bit?data?by?use?of?the?maxim?bits?20）
?*?eg.?9600bps?baudrate?buflen=1024B?then?TIMEOUT_SEC?=?1024*20/9600+1?=?3?
?*?don‘t?change?the?two?lines?below?unless?you?do?know?what?you?are?doing.
?*/
#define?TIMEOUT_SEC（buflen?baud）???????（buflen?*?20?/?baud?+?2）
#define?TIMEOUT_USEC????0

static?struct?termios?termios_old?termios_new;

int?OpenComPort?（int?ComPort?int?baudrate?int?databit?const?char?*stopbit?char?parity）
{
????????char?*pComPort;
	int?fd;?????????????//File?descriptor?for?the?port
????????int?retval;

????????switch?（ComPort）?{
????????????????case?0:
????????????????????????pComPort?=?“/dev/ttyS0“;
????????????????????????break;
????????????????case?1:
????????????????????????pComPort?=?“/dev/ttyS1“;
????????????????????????break;
????????????????case?2:
????????????????????????pComPort?=?“/dev/ttyS2“;
????????????????????????break;
????????????????case?3:
????????????????????????pComPort?=?“/dev/ttyS3“;
????????????????????????break;
????????????????case?4:
????????????????????????pComPort?=?“/dev/ttyS4“;
????????????????????????break;
????????????????case?5:
????????????????????????pComPort?=?“/dev/ttyS5“;
????????????????????????break;
????????????????case?6:
????????????????????????pComPort?=?“/dev/ttyS6“;
????????????????????????break;
????????????????case?7:
????????????????????????pComPort?=?“/dev/ttyS7“;
????????????????????????break;
????????????????default:
????????????????????????pComPort?=?“/dev/ttyS0“;
????????????????????????break;
????????}

????????fd?=?open?（pComPort?O_RDWR?|?O_NOCTTY?|?O_NONBLOCK）;
????????if?（-1?==?fd）
????????????????return?（-1）;

????????tcgetattr?（fd?&termios_old）;???????/*?save?old?termios?value?*/
????????/*?0?on?success?-1?on?failure?*/
????????retval?=?SetPortAttr?（fd?baudrate?databit?stopbit?parity）;
????????if?（-1?==?retval）
????????	return?-1;

????????return?（fd）;
}

void?CloseComPort?（int?fd）
{
????????/*?flush?output?data?before?close?and?restore?old?attribute?*/
????????tcsetattr?（fd?TCSADRAIN?&termios_old）;
????????close?（fd）;
}

int?ReadComPort?（int?fd?void?*data?int?datalength）
{
	fd_set?fs_read;
	struct?timeval?tv_timeout;
????????int?retval?=?0;

????????FD_ZERO?（&fs_read）;
????????FD_SET?（fd?&fs_read）;
????????tv_timeout.tv_sec?=?TIMEOUT_SEC?（datalength?GetBaudrate?（））;
????????tv_timeout.tv_usec?=?TIMEOUT_USEC;

????????retval?=?select?（fd?+?1?&fs_read?NULL?NULL?&tv_timeout）;
????????if?（retval）
????????????????return?（read?（fd?data?datalength））;
????????else
????????????????return?（-1）;
}

int?WriteComPort?（int?fd?

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

?????文件????????225??2009-07-17?14:44??SetupSerialPort\Makefile

?????文件???????9167??2009-07-17?14:44??SetupSerialPort\SetupSerialPort.c

?????文件????????681??2009-07-17?14:44??SetupSerialPort\SetupSerialPort.h

?????文件????????376??2009-07-26?17:49??SetupSerialPort\test.c

?????文件????????132??2009-07-26?17:54??SetupSerialPort\說明.txt

?????目錄??????????0??2009-07-26?17:52??SetupSerialPort

-----------?---------??----------?-----??----

????????????????10581????????????????????6