/* serial.c */ /* {{{ * * Copyright (C) 2003 Nicolas Schodet * * This program 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 of the License, or * (at your option) any later version. * * This program 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. * * Contact : * Web: http://perso.efrei.fr/~schodet/ * Email: * }}} */ #include #include #include #include #include /* +AutoDec */ /* -AutoDec */ /* Les variables globales, c'est mal. */ static int serial_busp_fd = -1; /* Ouvre le port série. */ int serial_busp_init (const char *file) { serial_busp_fd = open (file, O_RDONLY); return serial_busp_fd; } /* Ferme le port série. */ void serial_busp_uninit (void) { close (serial_busp_fd); } /* Ecrit un octet. */ void serial_busp_write (int addr, int data) { unsigned char c; c = addr & 0x0f; write (serial_busp_fd, &c, 1); c = data; write (serial_busp_fd, &c, 1); } /* Lit un octet. */ int serial_busp_read (int addr) { unsigned char c, c2; c = (addr & 0x0f) | 0x10; write (serial_busp_fd, &c, 1); read (serial_busp_fd, &c2, 1); // if (c != c2) ... read (serial_busp_fd, &c, 1); return c; }