Added read_serial function to read strings from a port.

git-svn-id: https://hamlib.svn.sourceforge.net/svnroot/hamlib/trunk@846 7ae35d74-ebe9-4afe-98af-79ac388436b8
Hamlib-1.1.3
Francois Retief 2002-01-07 17:14:22 +00:00
rodzic a95aa52b1b
commit 2e78e9b0bb
2 zmienionych plików z 77 dodań i 3 usunięć

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@ -4,7 +4,7 @@
* Parts of the PTT handling are derived from soundmodem, an excellent
* ham packet softmodem written by Thomas Sailer, HB9JNX.
*
* $Id: serial.c,v 1.21 2001-12-27 22:00:43 fillods Exp $
* $Id: serial.c,v 1.22 2002-01-07 17:14:22 fgretief Exp $
*
* This library is free software; you can redistribute it and/or modify
* it under the terms of the GNU Library General Public License as
@ -126,7 +126,8 @@ int serial_open(port_t *rp) {
#else /* sgtty */
ioctl (fd, TIOCGETP, &sg);
#endif
cfmakeraw(&options); /* Set serial port to RAW mode by default. */
/*
* Set the baud rates to requested values
*/
@ -567,6 +568,78 @@ int fread_block(port_t *p, char *rxbuffer, size_t count)
return total_count; /* return bytes count read */
}
/*
* Read a string from "fd" and put result into
* an array of unsigned char pointed to by "rxbuffer"
*
* Blocks on read until timeout hits.
*
* It then reads characters until one of the characters in
* "stopset" is found, or until "rxmax-1" characters was copied
* into rxbuffer. String termination character is added at the end.
*
* Actually, this function has nothing specific to serial comm,
* it could work very well also with any file handle, like a socket.
*
* Assumes rxbuffer!=NULL
*/
int read_string(port_t *p, char *rxbuffer, size_t rxmax, const char *stopset)
{
fd_set rfds;
struct timeval tv, tv_timeout;
int rd_count, total_count = 0;
int retval;
rxbuffer[0] = '\000';
FD_ZERO(&rfds);
FD_SET(p->fd, &rfds);
/*
* Wait up to timeout ms.
*/
tv_timeout.tv_sec = p->timeout/1000;
tv_timeout.tv_usec = (p->timeout%1000)*1000;
while (total_count < (rxmax-1)) {
tv = tv_timeout; /* select may have updated it */
retval = select(p->fd+1, &rfds, NULL, NULL, &tv);
if (retval == 0) /* Timed out */
break;
if (retval < 0) {
rig_debug(RIG_DEBUG_ERR,__FUNCTION__": select error after %d chars:"
" %s\n", total_count, strerror(errno));
return -RIG_EIO;
}
/*
* read 1 character from the rig, (check if in stop set)
* The file descriptor must have been set up non blocking.
*/
rd_count = read(p->fd, &rxbuffer[total_count], 1);
if (rd_count < 0) {
rig_debug(RIG_DEBUG_ERR, __FUNCTION__": read failed - %s\n",
strerror(errno));
return -RIG_EIO;
}
++total_count;
if (stopset && strchr(stopset, rxbuffer[total_count-1]))
break;
/* Note: This function will always break on a '\000' character. */
}
rxbuffer[total_count] = '\000';
if (total_count == 0) {
rig_debug(RIG_DEBUG_WARN, __FUNCTION__": timedout without reading a character\n");
return -RIG_ETIMEOUT;
}
rig_debug(RIG_DEBUG_TRACE,"RX %d characters\n",total_count);
dump_hex(rxbuffer, total_count);
return total_count; /* return bytes count read */
}
/*
* ser_ptt_set and par_ptt_set
* ser_ptt_open/ser_ptt_close & par_ptt_open/par_ptt_close

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@ -2,7 +2,7 @@
* Hamlib Interface - serial communication header
* Copyright (c) 2000,2001 by Stephane Fillod and Frank Singleton
*
* $Id: serial.h,v 1.14 2001-12-17 22:42:48 fillods Exp $
* $Id: serial.h,v 1.15 2002-01-07 17:14:22 fgretief Exp $
*
* This library is free software; you can redistribute it and/or modify
* it under the terms of the GNU Library General Public License as
@ -31,6 +31,7 @@ extern HAMLIB_EXPORT(int) read_block(port_t *p, char *rxbuffer, size_t count);
extern HAMLIB_EXPORT(int) write_block(port_t *p, const char *txbuffer, size_t count);
extern HAMLIB_EXPORT(int) fread_block(port_t *p, char *rxbuffer, size_t count);
extern HAMLIB_EXPORT(int) serial_flush(port_t *p);
extern HAMLIB_EXPORT(int) read_string(port_t *p, char *rxbuffer, size_t rxmax, const char *stopset);
/* Hamlib internal use, see rig.c */
int ser_open(port_t *p);