Как примонтить USB flash?

Есть железка на базе IntelXScale 400Мгц Мерили производительность (соритировка, захват семафоров процессами) оказалось на уровне Pentium 100 МГц

Нам показалось что IntelXScale сильно тормозит. Кто-нибудь может сказать на каком уровне должна быть производительность IntelXScale ?

Как оцените производительность на процессорах SuperHitachi ?

#include "hfile.h"

#define TO_B110 3200000 /* These values are the timeout delays */

#define TO_B300 1600000 /* at the end of packets of data. */

#define TO_B600 800000 /* At this stage a true calculation */

#define TO_B1200 400000 /* has not been worked out. So these */

#define TO_B2400 200000 /* values are just a guess. */

#define TO_B4800 100000 /* */

#define TO_B9600 50000 /* The spec says that a message frame */

#define TO_B19200 25000 /* starts after a silent interval of */

#define TO_B38400 12500 /* at least 3.5 character times. */

#define TO_B57600 8333 /* These are uS times. */

#define TO_B115200 4167

int set_up_comms( char *device, int baud_i, char *parity )

{

int ttyfd;

struct termios settings;

int char_interval_timeout;

speed_t baud_rate;

printf("set_up_comms device=%s\n",device);

if(( ttyfd = open( device,(O_RDWR | O_NOCTTY /*| O_SYNC | ~O_NONBLOCK*/) ) ) < 0 )

{

fprintf( stderr, "set_up_comms Error opening device %s.\n", device );

fprintf( stderr, "Error no. %d = %s\n", errno, strerror(errno));

exit( 1 );

}

tcgetattr(ttyfd,&settings);

#ifdef DEBUG

fprintf( stderr, "opening %s\n", device );

#endif

switch( baud_i )

{

case 110:

baud_rate = 110;

char_interval_timeout = TO_B110;

break;

case 300:

baud_rate = 300;

char_interval_timeout = TO_B300;

break;

case 600:

baud_rate = 600;

char_interval_timeout = TO_B600;

break;

case 1200:

baud_rate = 1200;

char_interval_timeout = TO_B1200;

break;

case 2400:

baud_rate = 2400;

char_interval_timeout = TO_B2400;

break;

case 4800:

baud_rate = 4800;

char_interval_timeout = TO_B4800;

break;

case 9600: case 0:

baud_rate = 9600; //baud_rate = B9600;

char_interval_timeout = TO_B9600;

//char_interval_timeout = 9600;

break;

case 19200:

baud_rate = 19200;

char_interval_timeout = TO_B19200;

break;

case 38400:

baud_rate = 38400;

char_interval_timeout = TO_B38400;

break;

case 57600:

baud_rate = 57600;

char_interval_timeout = TO_B57600;

break;

case 115200:

baud_rate = 115200;

char_interval_timeout = TO_B115200;

break;

default:

baud_rate = 9600;

char_interval_timeout = TO_B9600;

fprintf(stderr, "Unknown baud rate %d for %s.", baud_i, device);

}

#ifdef DEBUG

fprintf( stderr, "%s open\n", device );

#endif

/* read your man page for the meaning of all this. # man termios */

/* Its a bit to involved to comment here */

cfsetispeed( &settings, baud_rate );/* Set the baud rate */

cfsetospeed( &settings, baud_rate );

settings.c_cflag &=~ CSIZE;

settings.c_cflag |= CS8;

settings.c_cflag &=~ CSTOPB;

// settings.c_cflag |= CREAD;

if( strncmp( parity, "none", 4 ) == 0 )

{

settings.c_cflag &=~ PARENB;

settings.c_cflag &=~ PARODD;

}

else

if( strncmp( parity, "even", 4 ) == 0 )

{

settings.c_cflag |= PARENB;

settings.c_cflag &=~ PARODD;

}

else

{

settings.c_cflag |= PARENB;

settings.c_cflag |= PARODD;

}

// settings.c_cflag |= ~CNEW_RTSCTS;

// settings.c_cflag |= ~CRTSCTS;

// settings.c_cflag &= ~IHFLOW;

// settings.c_cflag &= ~OHFLOW;

// settings.c_cflag &= ~LKHFLOW;

settings.c_cflag &= ~HUPCL;

settings.c_cflag &= ~CLOCAL;

settings.c_cc[VMIN] = 1;

settings.c_cc[VTIME] = 0;

if( tcsetattr( ttyfd, TCSANOW, &settings ) < 0 )

{

fprintf( stderr, "tcsetattr failed\n");

exit( 1 );

}

return( ttyfd );

}

Правильно ли открываю СОМ порт?????????????????????????????????????

#include "hfile.h"

#define TO_B110 3200000 /* These values are the timeout delays */ #define TO_B300 1600000 /* at the end of packets of data. */ #define TO_B600 800000 /* At this stage a true calculation */ #define TO_B1200 400000 /* has not been worked out. So these */ #define TO_B2400 200000 /* values are just a guess. */ #define TO_B4800 100000 /* */ #define TO_B9600 50000 /* The spec says that a message frame */ #define TO_B19200 25000 /* starts after a silent interval of */ #define TO_B38400 12500 /* at least 3.5 character times. */ #define TO_B57600 8333 /* These are uS times. */ #define TO_B115200 4167

int set_up_comms( char *device, int baud_i, char *parity ) { int ttyfd; struct termios settings; int char_interval_timeout; speed_t baud_rate;

printf("set_up_comms device=%s\n",device);

if(( ttyfd = open( device, (O_RDWR | O_NOCTTY /*| O_SYNC | ~O_NONBLOCK*/) ) ) < 0 ) { fprintf( stderr, "set_up_comms Error opening device %s.\n", device ); fprintf( stderr, "Error no. %d = %s\n", errno, strerror(errno)); exit( 1 ); }

tcgetattr(ttyfd,&settings);

#ifdef DEBUG fprintf( stderr, "opening %s\n", device ); #endif

switch( baud_i ) { case 110: baud_rate = 110; char_interval_timeout = TO_B110; break; case 300: baud_rate = 300; char_interval_timeout = TO_B300; break; case 600: baud_rate = 600; char_interval_timeout = TO_B600; break; case 1200: baud_rate = 1200; char_interval_timeout = TO_B1200; break; case 2400: baud_rate = 2400; char_interval_timeout = TO_B2400; break; case 4800: baud_rate = 4800; char_interval_timeout = TO_B4800; break; case 9600: case 0: baud_rate = 9600; //baud_rate = B9600; char_interval_timeout = TO_B9600;

//char_interval_timeout = 9600; break; case 19200: baud_rate = 19200; char_interval_timeout = TO_B19200; break; case 38400: baud_rate = 38400; char_interval_timeout = TO_B38400; break; case 57600: baud_rate = 57600; char_interval_timeout = TO_B57600; break; case 115200: baud_rate = 115200; char_interval_timeout = TO_B115200; break; default: baud_rate = 9600; char_interval_timeout = TO_B9600; fprintf(stderr, "Unknown baud rate %d for %s.", baud_i, device); }

#ifdef DEBUG fprintf( stderr, "%s open\n", device ); #endif

/* read your man page for the meaning of all this. # man termios */ /* Its a bit to involved to comment here */

cfsetispeed( &settings, baud_rate );/* Set the baud rate */ cfsetospeed( &settings, baud_rate );

settings.c_cflag &=~ CSIZE; settings.c_cflag |= CS8; settings.c_cflag &=~ CSTOPB; // settings.c_cflag |= CREAD;

if( strncmp( parity, "none", 4 ) == 0 ) { settings.c_cflag &=~ PARENB; settings.c_cflag &=~ PARODD; } else if( strncmp( parity, "even", 4 ) == 0 ) { settings.c_cflag |= PARENB; settings.c_cflag &=~ PARODD; } else { settings.c_cflag |= PARENB; settings.c_cflag |= PARODD; }

// settings.c_cflag |= ~CNEW_RTSCTS; // settings.c_cflag |= ~CRTSCTS;

// settings.c_cflag &= ~IHFLOW; // settings.c_cflag &= ~OHFLOW;

// settings.c_cflag &= ~LKHFLOW; settings.c_cflag &= ~HUPCL; settings.c_cflag &= ~CLOCAL;

settings.c_cc[VMIN] = 1; settings.c_cc[VTIME] = 0;

if( tcsetattr( ttyfd, TCSANOW, &settings ) < 0 ) { fprintf( stderr, "tcsetattr failed\n"); exit( 1 ); }

return( ttyfd ); }

Hello ALL! Открываю файл fd=open("/var.file.log", O_CREAT | O_RWRD); fd=fprintf(fd,"file start\n"); Файл создаётся, но в него ни чего не добавляется, что делать???????