lcd4linux.git - lcd4linux

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author	reinelt <reinelt@3ae390bd-cb1e-0410-b409-cd5a39f66f1f>	2001-09-13 07:40:57 +0000
committer	reinelt <reinelt@3ae390bd-cb1e-0410-b409-cd5a39f66f1f>	2001-09-13 07:40:57 +0000
commit	f54b102fdb2005e01be18a40d2952a13b442931b (patch)
tree	389e1cb95033fc2c94947d65cf9ca1187912309a /fontmap.h
parent	5d9989113b56376af1c7707b8a67088c44d42020 (diff)
download	lcd4linux-f54b102fdb2005e01be18a40d2952a13b442931b.tar.gz

[lcd4linux @ 2001-09-13 07:40:57 by reinelt]

TODO update git-svn-id: https://ssl.bulix.org/svn/lcd4linux/trunk@150 3ae390bd-cb1e-0410-b409-cd5a39f66f1f

Diffstat (limited to 'fontmap.h')

0 files changed, 0 insertions, 0 deletions

/* $Id: drv_generic_serial.c,v 1.8 2004/03/03 04:44:16 reinelt Exp $ * * generic driver helper for serial and usbserial displays * * Copyright 1999, 2000 Michael Reinelt <reinelt@eunet.at> * Copyright 2004 The LCD4Linux Team <lcd4linux-devel@users.sourceforge.net> * * This file is part of LCD4Linux. * * LCD4Linux is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2, or (at your option) * any later version. * * LCD4Linux is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. * * * $Log: drv_generic_serial.c,v $ * Revision 1.8 2004/03/03 04:44:16 reinelt * changes (cosmetics?) to the big patch from Martin * hash patch un-applied * * Revision 1.7 2004/03/03 03:47:04 reinelt * big patch from Martin Hejl: * - use qprintf() where appropriate * - save CPU cycles on gettimeofday() * - add quit() functions to free allocated memory * - fixed lots of memory leaks * * Revision 1.6 2004/02/14 11:56:17 reinelt * M50530 driver ported * changed lots of 'char' to 'unsigned char' * * Revision 1.5 2004/02/04 19:10:51 reinelt * Crystalfontz driver nearly finished * * Revision 1.4 2004/02/01 08:05:12 reinelt * Crystalfontz 633 extensions (CRC checking and stuff) * Models table for HD44780 * Noritake VFD BVrightness patch from Bill Paxton * * Revision 1.3 2004/01/29 04:40:02 reinelt * every .c file includes "config.h" now * * Revision 1.2 2004/01/25 05:30:09 reinelt * plugin_netdev for parsing /proc/net/dev added * * Revision 1.1 2004/01/20 14:26:09 reinelt * moved drv_generic to drv_generic_serial * * Revision 1.2 2004/01/20 05:36:59 reinelt * moved text-display-specific stuff to drv_generic_text * moved all the bar stuff from drv_generic_bar to generic_text * * Revision 1.1 2004/01/20 04:51:39 reinelt * moved generic stuff from drv_MatrixOrbital to drv_generic * implemented new-stylish bars which are nearly finished * */ /* * * exported fuctions: * * int drv_generic_serial_open (char *driver, char *port, speed_t speed); * opens the serial port * * int drv_generic_serial_poll (unsigned char *string, int len) * reads from the serial or USB port * without retry * * int drv_generic_serial_read (unsigned char *string, int len); * reads from the serial or USB port * with retry * * void drv_generic_serial_write (unsigned char *string, int len); * writes to the serial or USB port * * int drv_generic_serial_close (void); * closes the serial port * */ #include "config.h" #include <stdlib.h> #include <stdio.h> #include <string.h> #include <errno.h> #include <unistd.h> #include <termios.h> #include <fcntl.h> #include <time.h> #include <signal.h> #include <sys/types.h> #include <sys/stat.h> #include "debug.h" #include "qprintf.h" #include "cfg.h" #include "drv_generic_serial.h" static char *Driver; static char *Port; static speed_t Speed; static int Device=-1; #define LOCK "/var/lock/LCK..%s" // **************************************** // *** generic serial/USB communication *** // **************************************** pid_t drv_generic_serial_lock_port (char *Port) { char lockfile[256]; char tempfile[256]; char buffer[16]; char *port, *p; int fd, len, pid; if (strncmp(Port, "/dev/", 5)==0) { port=strdup(Port+5); } else { port=strdup(Port); } while ((p=strchr(port, '/'))!=NULL) { *p='_'; } qprintf(lockfile, sizeof(lockfile), LOCK, port); qprintf(tempfile, sizeof(tempfile), LOCK, "TMP.XXXXXX"); free (port); if ((fd=mkstemp(tempfile))==-1) { error ("mkstemp(%s) failed: %s", tempfile, strerror(errno)); return -1; } if (fchmod(fd,S_IRUSR|S_IWUSR|S_IRGRP|S_IROTH)==-1) { error ("fchmod(%s) failed: %s", tempfile, strerror(errno)); close(fd); unlink(tempfile); return -1; } snprintf (buffer, sizeof(buffer), "%10d\n", (int)getpid()); if (write(fd, buffer, strlen(buffer))!=strlen(buffer)) { error ("write(%s) failed: %s", tempfile, strerror(errno)); close(fd); unlink(tempfile); return -1; } close (fd); while (link(tempfile, lockfile)==-1) { if (errno!=EEXIST) { error ("link(%s, %s) failed: %s", tempfile, lockfile, strerror(errno)); unlink(tempfile); return -1; } if ((fd=open(lockfile, O_RDONLY))==-1) { if (errno==ENOENT) continue; // lockfile disappared error ("open(%s) failed: %s", lockfile, strerror(errno)); unlink (tempfile); return -1; } len=read(fd, buffer, sizeof(buffer)-1); if (len<0) { error ("read(%s) failed: %s", lockfile, strerror(errno)); unlink (tempfile); return -1; } buffer[len]='\0'; if (sscanf(buffer, "%d", &pid)!=1 || pid==0) { error ("scan(%s) failed.", lockfile); unlink (tempfile); return -1; } if (pid==getpid()) { error ("%s already locked by us. uh-oh...", lockfile); unlink(tempfile); return 0; } if ((kill(pid, 0)==-1) && errno==ESRCH) { error ("removing stale lockfile %s", lockfile); if (unlink(lockfile)==-1 && errno!=ENOENT) { error ("unlink(%s) failed: %s", lockfile, strerror(errno)); unlink(tempfile); return pid; } continue; } unlink (tempfile); return pid; } unlink (tempfile); return 0; } static pid_t drv_generic_serial_unlock_port (char *Port) { char lockfile[256]; char *port, *p; if (strncmp(Port, "/dev/", 5)==0) { port=strdup(Port+5); } else { port=strdup(Port); } while ((p=strchr(port, '/'))!=NULL) { *p='_'; } qprintf(lockfile, sizeof(lockfile), LOCK, port); unlink (lockfile); free (port); return 0; } int drv_generic_serial_open (char *section, char *driver) { int i, fd; pid_t pid; struct termios portset; Driver = driver; Port=cfg_get(section, "Port", NULL); if (Port==NULL || *Port=='\0') { error ("%s: no '%s.Port' entry from %s", Driver, section, cfg_source()); return -1; } if (cfg_number(section, "Speed", 19200, 1200, 115200, &i)<0) return -1; switch (i) { case 1200: Speed = B1200; break; case 2400: Speed = B2400; break; case 4800: Speed = B4800; break; case 9600: Speed = B9600; break; case 19200: Speed = B19200; break; case 38400: Speed = B38400; break; case 57600: Speed = B57600; break; case 115200: Speed = B115200; break; default: error ("%s: unsupported speed '%d' from %s", Driver, i, cfg_source()); return -1; } info ("%s: using port '%s' at %d baud", Driver, Port, i); if ((pid=drv_generic_serial_lock_port(Port))!=0) { if (pid==-1) error ("%s: port %s could not be locked", Driver, Port); else error ("%s: port %s is locked by process %d", Driver, Port, pid); return -1; } fd = open(Port, O_RDWR | O_NOCTTY | O_NDELAY); if (fd==-1) { error ("%s: open(%s) failed: %s", Driver, Port, strerror(errno)); drv_generic_serial_unlock_port(Port); return -1; } if (tcgetattr(fd, &portset)==-1) { error ("%s: tcgetattr(%s) failed: %s", Driver, Port, strerror(errno)); drv_generic_serial_unlock_port(Port); return -1; } cfmakeraw(&portset); cfsetospeed(&portset, Speed); if (tcsetattr(fd, TCSANOW, &portset)==-1) { error ("%s: tcsetattr(%s) failed: %s", Driver, Port, strerror(errno)); drv_generic_serial_unlock_port(Port); return -1; } Device=fd; return Device; } int drv_generic_serial_poll (unsigned char *string, int len) { int ret; if (Device==-1) return -1; ret=read (Device, string, len); if (ret<0 && errno!=EAGAIN) { error("%s: read(%s) failed: %s", Driver, Port, strerror(errno)); } return ret; } int drv_generic_serial_read (unsigned char *string, int len) { int run, ret; for (run=0; run<10; run++) { ret=drv_generic_serial_poll(string, len); if (ret>=0 || errno!=EAGAIN) break; info ("%s: read(%s): EAGAIN", Driver, Port); usleep(1000); } if (ret>0 && ret!=len) { error ("%s: partial read(%s): len=%d ret=%d", Driver, Port, len, ret); } return ret; } void drv_generic_serial_write (unsigned char *string, int len) { int run, ret; if (Device==-1) return; for (run=0; run<10; run++) { ret=write (Device, string, len); if (ret>=0 || errno!=EAGAIN) break; info ("%s: write(%s): EAGAIN", Driver, Port); usleep(1000); } if (ret<0) { error ("%s: write(%s) failed: %s", Driver, Port, strerror(errno)); } else if (ret!=len) { error ("%s: partial write(%s): len=%d ret=%d", Driver, Port, len, ret); } return; } int drv_generic_serial_close (void) { info ("%s: closing port %s", Driver, Port); close (Device); drv_generic_serial_unlock_port(Port); free(Port); return 0; }


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