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|
#define BUFFER 15
#define BAUDRATE B19200
/**
* Donnée à traiter
*/
typedef struct s_Config{
int fd;
char *ptr_data;
struct termios oldTerm;
struct termios newTerm;
}ts_Config;
/**
* Fonction d'initialisation
*/
ts_Config *f_Init_Create_new_Config( void ){
ts_Config *ptr = NULL;
ptr = (ts_Config*)calloc( 1, sizeof( ts_Config) );
if( (NULL) == ptr ){
fprintf( stderr, "Erreur allocation new config %s\n",
strerror(errno) );
return ( NULL );
}
ptr->fd = 0;
ptr->ptr_data = NULL;
ptr->ptr_data = (char*)calloc( BUFFER, sizeof(char) );
if( (NULL) == ptr->ptr_data ){
free( ptr );
ptr = NULL;
fprintf(stderr, "Erreur allocation data liaison\n %s\n",
strerror(errno) );
return( NULL );
}
return( ptr );
}
/**
* Configuration
*/
void f_ConfigSaveTerm( ts_Config *ptr_data ){
/* Sauvegarde des configuration */
tcgetattr( ptr_data->fd, &(ptr_data->oldTerm) ); /* Ancienne */
tcgetattr( ptr_data->fd, &(ptr_data->newTerm) ); /* Nouvelle */
/* Ex de config & option nouvelle */
ptr_data->newTerm.c_oflag = 0L;
ptr_data->newTerm.c_lflag = 0L;
ptr_data->newTerm.c_cc[VMIN] = 1;
ptr_data->newTerm.c_cc[VTIME] = 0;
ptr_data->newTerm.c_cflag |= CS8;
ptr_data->newTerm.c_cflag |= CREAD;
ptr_data->newTerm.c_cflag |= CLOCAL;
ptr_data->newTerm.c_lflag = IGNBRK;
ptr_data->newTerm.c_cflag &= ~(CSIZE|PARENB|CSTOPB);
ptr_data->newTerm.c_iflag &= ~(IXON|IXOFF|IXANY);
cfsetispeed( &(ptr_data->newTerm), BAUDRATE );
cfsetospeed( &(ptr_data->newTerm), BAUDRATE );
/* Application de la nouvelle configuration */
tcsetattr( ptr_data->fd, TCSANOW, &(ptr_data->newTerm) );
tcflush( ptr_data->fd, TCIFLUSH );
}
/**
* Destruction de l'ensemble des donnée
*/
void f_FreeConfig( ts_Config *ptr ){
ptr->fd = 0;
free( ptr->ptr_data );
ptr->ptr_data = NULL;
free( ptr );
ptr = NULL;
}
/**
* fonction Close Liaison &
*/
void f_ResetLiaison( ts_Config *ptr ){
tcsetattr( ptr->fd, TCSANOW, &(ptr->oldTerm) );
f_FreeConfig( ptr );
}
/**
* Fonction Principale
*/
int main( void ){
int i_read = 0;
char c_str = '\0';
ts_Config *ptr = NULL;
unsigned int i_Cmpt = 0;
/* Initialisation et configuration */
ptr = f_Init_Create_new_Config();
if( (NULL) == ptr )
exit( EXIT_FAILURE );
f_ConfigSaveTerm( ptr );
/* Ouverture de la liaison */
ptr->fd = open( "/dev/tty0", O_RDWR|O_NOCTTY );
if( (-1) == ptr->fd ){
f_ResetLiaison( ptr );
fprintf( stderr, "Erreur ouverture de la liaison %s\n",
strerror(errno) );
return( EXIT_FAILURE );
}
/* Ex lecture data */
do{
i_read = read( ptr->fd, &c_str, 1 );
if( (-1) == i_read ){
close( ptr->fd );
f_ResetLiaison( ptr );
fprintf(stderr, "Erreur de lecture data %s\n",
strerror(errno) );
exit( EXIT_FAILURE );
}
*( ptr->ptr_data + i_Cmpt) = c_str;
i_Cmpt += 1;
}while( BUFFER > i_Cmpt );
/* Affichage */
printf(">>\t%s\n", ptr->ptr_data );
memset( ptr->ptr_data, 0, BUFFER );
/* fermeture */
close( ptr->fd );
f_ResetLiaison( ptr );
return( EXIT_SUCCESS );
} |
