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[/] [eco32/] [trunk/] [hwtests/] [serial/] [fpga2pc/] [receive.c] - Blame information for rev 115

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Line No. Rev Author Line
1 14 hellwig
/*
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 * receive.c -- serial line test program
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 */
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <stdarg.h>
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#include <fcntl.h>
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#include <unistd.h>
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#include <termios.h>
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#define SERIAL_PORT     "/dev/ttyS0"
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#define NUM_TRIES       10
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#define SYN             0x16
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#define ACK             0x06
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static FILE *diskFile = NULL;
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static int sfd = 0;
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static struct termios origOptions;
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static struct termios currOptions;
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void serialClose(void);
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void error(char *fmt, ...) {
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  va_list ap;
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  va_start(ap, fmt);
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  printf("Error: ");
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  vprintf(fmt, ap);
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  printf("\n");
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  va_end(ap);
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  if (diskFile != NULL) {
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    fclose(diskFile);
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    diskFile = NULL;
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  }
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  if (sfd != 0) {
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    serialClose();
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    sfd = 0;
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  }
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  exit(1);
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}
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void serialOpen(void) {
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  sfd = open(SERIAL_PORT, O_RDWR | O_NOCTTY | O_NDELAY);
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  if (sfd == -1) {
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    error("cannot open serial port '%s'", SERIAL_PORT);
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  }
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  tcgetattr(sfd, &origOptions);
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  currOptions = origOptions;
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  cfsetispeed(&currOptions, B38400);
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  cfsetospeed(&currOptions, B38400);
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  currOptions.c_cflag |= (CLOCAL | CREAD);
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  currOptions.c_cflag &= ~PARENB;
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  currOptions.c_cflag &= ~CSTOPB;
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  currOptions.c_cflag &= ~CSIZE;
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  currOptions.c_cflag |= CS8;
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  currOptions.c_cflag &= ~CRTSCTS;
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  currOptions.c_lflag &= ~(ICANON | ECHO | ECHONL | ISIG | IEXTEN);
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  currOptions.c_iflag &= ~(IGNBRK | BRKINT | IGNPAR | PARMRK);
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  currOptions.c_iflag &= ~(INPCK | ISTRIP | INLCR | IGNCR | ICRNL);
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  currOptions.c_iflag &= ~(IXON | IXOFF | IXANY);
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  currOptions.c_oflag &= ~(OPOST | ONLCR | OCRNL | ONOCR | ONLRET);
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  tcsetattr(sfd, TCSANOW, &currOptions);
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}
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void serialClose(void) {
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  tcsetattr(sfd, TCSANOW, &origOptions);
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  close(sfd);
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}
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int serialSnd(unsigned char b) {
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  int n;
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  n = write(sfd, &b, 1);
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  return n == 1;
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}
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int serialRcv(unsigned char *bp) {
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  int n;
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  n = read(sfd, bp, 1);
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  return n == 1;
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}
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int main(int argc, char *argv[]) {
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  unsigned char prev, curr;
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  int count, errors;
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  if (argc != 1) {
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    printf("Usage: %s\n", argv[0]);
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    exit(1);
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  }
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  serialOpen();
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  count = 0;
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  errors = 0;
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  while (!serialRcv(&prev)) ;
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  count++;
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  while (count < 100000) {
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    while (!serialRcv(&curr)) ;
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    count++;
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    if (((prev + 1) & 0xFF) != curr) {
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      errors++;
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    }
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    prev = curr;
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  }
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  if (sfd != 0) {
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    serialClose();
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    sfd = 0;
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  }
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  printf("count = %d (ok = %d, errors = %d)\n",
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         count, count - errors, errors);
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  return 0;
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}

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