79 lines
1.7 KiB
C
79 lines
1.7 KiB
C
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#include <stdio.h>
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#include <stdlib.h>
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#include <termios.h>
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#include <sys/fcntl.h>
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#include <unistd.h>
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#include <string.h>
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#include <errno.h>
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int main()
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{
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int fd;
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int retour;
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char str[255];
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struct termios tty, orig;
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tty.c_iflag = IGNBRK | IGNPAR;
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tty.c_oflag = 0;
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tty.c_cflag = B9600 | CS8 | CLOCAL | CREAD | IGNPAR | CSTOP;
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tty.c_cflag &= ~PARENB;
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tty.c_cflag &= ~CRTSCTS;
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tty.c_lflag &= ~ICANON;
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tty.c_lflag &= ~ECHO;
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tty.c_cc[VMIN] = 0;
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tty.c_cc[VTIME] = 1;
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//Ouverture de la liaison serie
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fd = open("/dev/ttyS0", O_RDWR);
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if(fd == -1)
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{
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printf("Probleme d'ouverture : %s\n", strerror(errno));
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exit(errno);
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}
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/*traitement, lecture/ecriture*/
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//fermeture du port
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if(retour == -1)
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{
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printf("Probleme de fermeture : %s\n", strerror(errno));
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exit(errno);
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}
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/* Lecture et sauvegarde des parametres courants */
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tcgetattr(fd,&tty);
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orig=tty;
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/* remplissage des champs de la structure termios*/
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/* appplication des nouveaux parametres */
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if(tcsetattr(fd,TCSANOW,&tty)<0)
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{
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printf ("impossible d'initialiser le port série\n");
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}
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/* lecture/ecriture/traitement sur la liaison série */
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do{
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printf("Que voulez-vous envoyer ?\n");
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gets(str);
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write(fd, str, strlen(str));
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printf("%s a ete envoye.\n", str);
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}while(1);
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/* on remet l'etat initiale de la configuration du port*/
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if(tcsetattr(fd,TCSANOW,&orig)<0)
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{
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printf ("impossible d'initialiser le port série\n");
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}
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/* Fermeture port série*/
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retour=close(fd);
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if ( retour == -1 )
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{
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printf("pb fermeture: %s\n",strerror(errno));
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exit(errno);
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}
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return 0;
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}
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