×ðÁú¿­Ê±

ÉèÖÃLinuxϵͳÒÔÖ§³Ö´®¿ÚͨѶ±à³Ì

ÉèÖÃlinuxϵͳÒÔÖ§³Ö´®¿ÚͨѶ±à³Ì

´®¿ÚͨѶÊÇÒ»ÖÖ³£¼ûµÄÓ²¼þͨѶ·½·¨£¬ÓÃÓÚÔÚÅÌËã»úÓëÍⲿװ±¸Ö®¼ä¾ÙÐÐÊý¾Ý´«Êä¡£ÔÚLinuxϵͳÖУ¬ÎÒÃÇ¿ÉÒÔͨ¹ýÉèÖÃÀ´ÊµÏÖ¶Ô´®¿ÚµÄÖ§³Ö£¬½ø¶ø¾ÙÐд®¿ÚͨѶ±à³Ì¡£±¾ÎĽ«ÏÈÈÝÔõÑùÔÚLinuxϵͳÖÐÉèÖô®¿Ú£¬²¢ÌṩÁËÏà¹ØµÄ´úÂëʾÀý¡£

Ò»¡¢Éó²é´®¿Ú×°±¸

ÔÚLinuxϵͳÖУ¬´®¿Ú×°±¸±»³ÆΪTTY×°±¸¡£ÎÒÃÇ¿ÉÒÔͨ¹ýÖÕ¶ËÏÂÁîls /dev/ttyS*À´Éó²éϵͳÖб£´æµÄ´®¿Ú×°±¸¡£Í¨³££¬ÈôÊÇϵͳ±£´æ´®¿Ú×°±¸£¬»áÏÔʾÀàËÆ /dev/ttyS0 »ò /dev/ttyS1 µÄÊä³ö¡£ÆäÖУ¬/dev/ttyS0 ´ú±íµÚÒ»¸ö´®¿Ú×°±¸£¬/dev/ttyS1 ´ú±íµÚ¶þ¸ö´®¿Ú×°±¸£¬ÒÔ´ËÀàÍÆ¡£

¶þ¡¢ÉèÖô®¿Ú²ÎÊý

ÔÚ¾ÙÐд®¿ÚͨѶ±à³Ì֮ǰ£¬ÎÒÃÇÐèÒªÉèÖô®¿ÚµÄ²ÎÊý£¬°üÀ¨²¨ÌØÂÊ¡¢Êý¾Ýλ¡¢Ð£Ñéλ¡¢×èֹλµÈ¡£¿ÉÒÔͨ¹ýÖÕ¶ËÏÂÁîsttyÀ´¾ÙÐд®¿Ú²ÎÊýµÄÉèÖá£ÒÔÏÂÊÇÒ»¸öʾÀýÏÂÁ

stty -F /dev/ttyS0 9600 cs8 -cstopb -parenb

µÇ¼ºó¸´ÖÆ

ÉÏÊöÏÂÁîÖУ¬¡°-F /dev/ttyS0¡±Ö¸¶¨ÁËÒªÉèÖõĴ®¿Ú×°±¸Îª/dev/ttyS0£¬9600ÊÇÖ¸¶¨µÄ²¨ÌØÂÊ£¬cs8ÌåÏÖÊý¾ÝλΪ8룬-cstopbÌåÏÖ×èֹλΪ1룬-parenbÌåÏÖ²»¾ÙÐÐÆæżУÑ顣ƾ֤ÐèÒª£¬¿ÉÒÔƾ֤ÏÖÕæÏàÐε÷½âÕâЩ²ÎÊý¡£

Èý¡¢·­¿ª´®¿Ú×°±¸

ÔÚ¾ÙÐд®¿ÚͨѶ±à³Ì֮ǰ£¬ÐèҪͨ¹ý·­¿ª´®¿Ú×°±¸À´¾ÙÐвÙ×÷¡£¿ÉÒÔʹÓÃopen()º¯ÊýÀ´·­¿ª´®¿Ú×°±¸¡£ÒÔÏÂÊÇÒ»¸ö¼òÆӵĴúÂëʾÀý£º

#include<unistd.h>
#include<fcntl.h>
#include<errno.h>

int fd = open("/dev/ttyS0", O_RDWR | O_NOCTTY | O_NONBLOCK);  
if (fd == -1) {
    perror("·­¿ª´®¿Ú×°±¸Ê§°Ü");
    return -1;
}

µÇ¼ºó¸´ÖÆ

ÉÏÊö´úÂëÖУ¬open()º¯Êýͨ¹ý´«Èë´®¿Ú×°±¸Â·¾¶/dev/ttyS0ÒÔ¼°Ò»Ð©±ê¼ÇÀ´·­¿ª´®¿Ú×°±¸¡£O_RDWRÌåÏÖÒԿɶÁдµÄ·½·¨·­¿ª×°±¸£¬O_NOCTTYÌåÏÖ²»½«·­¿ªµÄ´®¿Ú×÷Ϊ¿ØÖÆÖնˣ¬O_NONBLOCKÌåÏÖÒÔ·ÇÛձյķ½·¨·­¿ª×°±¸¡£·­¿ªÀֳɺ󣬻᷵»ØÒ»¸öÎļþÐÎò·ûfd¹©ºóÐøʹÓá£

ËÄ¡¢ÉèÖô®¿Ú²ÎÊý

ÔÚ·­¿ª´®¿Ú×°±¸ºó£¬ÎÒÃÇÐèҪʹÓÃtcgetattr()º¯Êý»ñÈ¡´®¿ÚµÄԭʼ²ÎÊý£¬È»ºóͨ¹ýÐÞ¸ÄÕâЩ²ÎÊýÀ´¾ÙÐд®¿Ú²ÎÊýµÄÉèÖá£ÒÔÏÂÊÇÒ»¸ö¼òÆӵĴúÂëʾÀý£º

#include<termios.h>

struct termios options;
tcgetattr(fd, &options);

cfsetispeed(&options, B9600);   // ÉèÖÃÊäÈ벨ÌØÂÊΪ9600
cfsetospeed(&options, B9600);   // ÉèÖÃÊä³ö²¨ÌØÂÊΪ9600
options.c_cflag |= CS8 | CLOCAL | CREAD;  // ÉèÖÃÊý¾ÝλΪ8룬²¢¿ªÆôÍâµØÅþÁ¬ºÍÎüÊÕʹÄÜ
options.c_cflag &= ~PARENB;    // ¹Ø±ÕÆæżУÑé
options.c_cflag &= ~CSTOPB;    // ÉèÖÃ×èֹλΪ1λ

tcsetattr(fd, TCSANOW, &options);

µÇ¼ºó¸´ÖÆ

ÉÏÊö´úÂëÖУ¬tcgetattr()º¯ÊýÓÃÓÚ»ñÈ¡´®¿ÚµÄԭʼ²ÎÊý£¬²¢½«Æä´æ´¢ÔÚstruct termios½á¹¹Ìå±äÁ¿optionsÖС£½Ó×Å£¬Í¨¹ýcfsetispeed()ºÍcfsetospeed()º¯ÊýÉèÖÃÊäÈëºÍÊä³ö²¨ÌØÂÊΪ9600£¬ÔÙͨ¹ýλ²Ù×÷ÉèÖÃÊý¾Ýλ¡¢ÆæżУÑéºÍ×èֹλµÈ²ÎÊý¡£×îºó£¬Ê¹ÓÃtcsetattr()º¯Êý½«Ð޸ĺóµÄ²ÎÊýд»Ø´®¿ÚÖС£

Îå¡¢´®¿ÚͨѶ

ÔÚÉèÖÃÍê´®¿Ú²ÎÊýºó£¬ÎÒÃÇ¿ÉÒÔʹÓÃread()º¯Êý´Ó´®¿ÚÖжÁÈ¡Êý¾Ý£¬Ê¹ÓÃwrite()º¯ÊýÏò´®¿ÚÖÐдÈëÊý¾Ý¡£ÒÔÏÂÊÇÒ»¸ö¼òÆÓµÄÎüÊÕ´®¿ÚÊý¾ÝµÄ´úÂëʾÀý£º

char buffer[255];
int bytes_read = read(fd, buffer, sizeof(buffer));
if (bytes_read == -1) {
    perror("¶ÁÈ¡´®¿ÚÊý¾Ýʧ°Ü");
    return -1;
}

printf("ÎüÊÕµ½µÄÊý¾Ý£º%s
", buffer);

µÇ¼ºó¸´ÖÆ

ÉÏÊö´úÂëÖУ¬ÎÒÃÇÏȽç˵ÁËÒ»¸ö»º³åÇøbufferÓÃÓÚ´æ´¢ÎüÊÕµ½µÄÊý¾Ý¡£È»ºó£¬Ê¹ÓÃread()º¯Êý´Ó´®¿ÚÖжÁÈ¡Êý¾Ý£¬²¢½«¶ÁÈ¡µ½µÄÊý¾Ý´æ´¢ÔÚ»º³åÇøÖС£½Ó×Å£¬Ê¹ÓÃprintf()º¯Êý´òÓ¡³öÎüÊÕµ½µÄÊý¾Ý¡£

Áù¡¢¹Ø±Õ´®¿Ú×°±¸

ÔÚ³ÌÐò¿¢Êºó£¬ÎÒÃÇÐèÒª¹Ø±Õ·­¿ªµÄ´®¿Ú×°±¸¡£¿ÉÒÔʹÓÃclose()º¯ÊýÀ´¹Ø±Õ´®¿Ú×°±¸£¬ÈçÏÂËùʾ£º

close(fd);

µÇ¼ºó¸´ÖÆ

ÉÏÊö´úÂ뽫¹Ø±ÕÏÈÇ°·­¿ªµÄ´®¿Ú×°±¸£¬²¢ÊÍ·ÅÏà¹ØµÄ×ÊÔ´¡£

ͨ¹ýÒÔÉϵÄÉèÖúʹúÂëʾÀý£¬ÎÒÃÇ¿ÉÒÔÔÚLinuxϵͳÖÐʵÏÖ´®¿ÚͨѶ±à³Ì¡£ËäÈ»£¬ÏÖʵӦÓÃÖл¹ÐèҪ˼Á¿¸ü¶àµÄÇéÐΣ¬ÈçÒì³£´¦Öóͷ£¡¢»º³åÇøÖÎÀíµÈ¡£Ï£Íû±¾ÎÄÄܹ»ÎªÄúÌṩһЩ×ÊÖú¡£

ÒÔÉϾÍÊÇÉèÖÃLinuxϵͳÒÔÖ§³Ö´®¿ÚͨѶ±à³ÌµÄÏêϸÄÚÈÝ£¬¸ü¶àÇë¹Ø×¢±¾ÍøÄÚÆäËüÏà¹ØÎÄÕ£¡

ÃâÔð˵Ã÷£ºÒÔÉÏչʾÄÚÈÝȪԴÓÚÏàÖúýÌå¡¢ÆóÒµ»ú¹¹¡¢ÍøÓÑÌṩ»òÍøÂçÍøÂçÕûÀí£¬°æȨÕùÒéÓë±¾Õ¾Î޹أ¬ÎÄÕÂÉæ¼°¿´·¨Óë¿´·¨²»´ú±í×ðÁú¿­Ê±ÂËÓÍ»úÍø¹Ù·½Ì¬¶È£¬Çë¶ÁÕß½ö×ö²Î¿¼¡£±¾ÎĽӴýתÔØ£¬×ªÔØÇë˵Ã÷À´ÓÉ¡£ÈôÄúÒÔΪ±¾ÎÄÇÖÕ¼ÁËÄúµÄ°æȨÐÅÏ¢£¬»òÄú·¢Ã÷¸ÃÄÚÈÝÓÐÈκÎÉæ¼°ÓÐÎ¥¹«µÂ¡¢Ã°·¸Ö´·¨µÈÎ¥·¨ÐÅÏ¢£¬ÇëÄúÁ¬Ã¦ÁªÏµ×ðÁú¿­Ê±ÊµÊ±ÐÞÕý»òɾ³ý¡£

Ïà¹ØÐÂÎÅ

ÁªÏµ×ðÁú¿­Ê±

18523999891

¿É΢ÐÅÔÚÏß×Éѯ

ÊÂÇéʱ¼ä£ºÖÜÒ»ÖÁÖÜÎ壬9:30-18:30£¬½ÚãåÈÕÐÝÏ¢

QR code
¡¾ÍøÕ¾µØͼ¡¿¡¾sitemap¡¿