Subversion Repositories logicprobe

/*

 * receive.c -- LogicProbe serial line receiver

 */

#include <stdio.h>

#include <stdlib.h>

#include <string.h>

#include <stdarg.h>

#include <fcntl.h>

#include <unistd.h>

#include <termios.h>

#define SERIAL_PORT     "/dev/ttyS0"

static int debug = 0;

static FILE *diskFile = NULL;

static int sfd = 0;

static struct termios origOptions;

static struct termios currOptions;

void serialClose(void);

void error(char *fmt, ...) {

  va_list ap;

  va_start(ap, fmt);

  printf("Error: ");

  vprintf(fmt, ap);

  printf("\n");

  va_end(ap);

  if (diskFile != NULL) {

    fclose(diskFile);

    diskFile = NULL;

  }

  if (sfd != 0) {

    serialClose();

    sfd = 0;

  }

  exit(1);

}

void serialOpen(void) {

  sfd = open(SERIAL_PORT, O_RDWR | O_NOCTTY | O_NDELAY);

  if (sfd == -1) {

    error("cannot open serial port '%s'", SERIAL_PORT);

  }

  tcgetattr(sfd, &origOptions);

  currOptions = origOptions;

  cfsetispeed(&currOptions, B38400);

  cfsetospeed(&currOptions, B38400);

  currOptions.c_cflag |= (CLOCAL | CREAD);

  currOptions.c_cflag &= ~PARENB;

  currOptions.c_cflag &= ~CSTOPB;

  currOptions.c_cflag &= ~CSIZE;

  currOptions.c_cflag |= CS8;

  currOptions.c_cflag &= ~CRTSCTS;

  currOptions.c_lflag &= ~(ICANON | ECHO | ECHONL | ISIG | IEXTEN);

  currOptions.c_iflag &= ~(IGNBRK | BRKINT | IGNPAR | PARMRK);

  currOptions.c_iflag &= ~(INPCK | ISTRIP | INLCR | IGNCR | ICRNL);

  currOptions.c_iflag &= ~(IXON | IXOFF | IXANY);

  currOptions.c_oflag &= ~(OPOST | ONLCR | OCRNL | ONOCR | ONLRET | OFILL);

  tcsetattr(sfd, TCSANOW, &currOptions);

}

void serialClose(void) {

  tcsetattr(sfd, TCSANOW, &origOptions);

  close(sfd);

}

int serialSnd(unsigned char b) {

  int n;

  n = write(sfd, &b, 1);

  return n == 1;

}

int serialRcv(unsigned char *bp) {

  int n;

  n = read(sfd, bp, 1);

  return n == 1;

}

int main(int argc, char *argv[]) {

  unsigned char b;

  int i, j;

  if (argc != 2) {

    printf("Usage: %s <data_file>\n", argv[0]);

    exit(1);

  }

  diskFile = fopen(argv[1], "wb");

  if (diskFile == NULL) {

    error("cannot open data file %s for write", argv[1]);

  }

  serialOpen();

  serialRcv(&b);

  for (i = 0; i < 512; i++) {

    if (debug) {

      printf("%03d:  ", i);

    }

    for (j = 0; j < 16; j++) {

      while (!serialRcv(&b)) ;

      if (fwrite(&b, 1, 1, diskFile) != 1) {

        error("cannot write to data file %s", argv[1]);

      }

      if (debug) {

        printf("%02X  ", b);

      }

    }

    if (debug) {

      printf("\n");

    }

  }

  if (diskFile != NULL) {

    fclose(diskFile);

    diskFile = NULL;

  }

  if (sfd != 0) {

    serialClose();

    sfd = 0;

  }

  return 0;

}