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/* Copyright (c) 2003, Erik Rigtorp <erkki@linux.nu>
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of Erik Rigtorp nor the names of his contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* * Cleaned up everything.
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* * Added printing of error messages.
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* -- Erik Rigtorp <erkki@linux.nu> Thu, 05 Jun 2003 00:57:44 +0200
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/* local function prototypes */
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SMALLINT owAcquire(int,char *);
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int fd[MAX_PORTNUM]; /* a list of filedescriptors for serial ports */
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struct termios term[MAX_PORTNUM]; /* Current termios settings */
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struct termios term_orig[MAX_PORTNUM]; /* backup termios settings */
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/* Attempt to acquire a 1-Wire net. Associate 'portnum' with the serial port
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* with name 'port_zstr'. Returns TRUE on success. */
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SMALLINT owAcquire(int portnum, char *port_zstr)
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/* Open the serial port */
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if ((fd[portnum] = open(port_zstr, O_RDWR)) == -1)
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OWERROR(OWERROR_GET_SYSTEM_RESOURCE_FAILED);
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perror("owAcquire: failed to open device");
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/* Get device settings */
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if(tcgetattr(fd[portnum], &term[portnum] ) < 0 )
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OWERROR(OWERROR_SYSTEM_RESOURCE_INIT_FAILED);
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perror("owAcquire: failed to set attributes");
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term_orig[portnum] = term[portnum];
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/* Reset all settings */
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term[portnum].c_iflag = 0;
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term[portnum].c_oflag = 0;
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term[portnum].c_lflag = 0;
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term[portnum].c_cflag = 0;
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/* 1 byte at a time, no timer */
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term[portnum].c_cc[VMIN] = 1;
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term[portnum].c_cc[VTIME] = 0;
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/* 6 data bits, Receiver enabled, Hangup, Dont change "owner" */
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term[portnum].c_cflag |= CS6 | CREAD | HUPCL | CLOCAL;
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/* Set input and output speed to 115.2k */
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cfsetispeed(&term[portnum], B115200);
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cfsetospeed(&term[portnum], B115200);
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/* set the attributes */
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if(tcsetattr(fd[portnum], TCSANOW, &term[portnum]) < 0 )
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OWERROR(OWERROR_SYSTEM_RESOURCE_INIT_FAILED);
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perror("owAcquire: failed to set attributes");
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/* Flush the input and output buffers */
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tcflush(fd[portnum], TCIOFLUSH);
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/* Release port 'portnum' */
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void owRelease(int portnum)
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/* Restore original settings */
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if(tcsetattr(fd[portnum], TCSANOW, &term_orig[portnum]) < 0 )
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/* We failed doing that */
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OWERROR(OWERROR_SYSTEM_RESOURCE_INIT_FAILED);
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perror("owAcquire: failed to set attributes");
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if (close(fd[portnum]) < 0)
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/* We failed closing the port */
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OWERROR(OWERROR_SYSTEM_RESOURCE_INIT_FAILED);
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perror("owAcquire: failed to close port");
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/* we should return an error condition here but MAXIMS API is
added
removed
userial/ds9097/linuxses.c
