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001 /* Copyright (C) 2004 David Decotigny 002 003 This program is free software; you can redistribute it and/or 004 modify it under the terms of the GNU General Public License 005 as published by the Free Software Foundation; either version 2 006 of the License, or (at your option) any later version. 007 008 This program is distributed in the hope that it will be useful, 009 but WITHOUT ANY WARRANTY; without even the implied warranty of 010 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 011 GNU General Public License for more details. 012 013 You should have received a copy of the GNU General Public License 014 along with this program; if not, write to the Free Software 015 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, 016 USA. 017 */ 018 #ifndef _SOS_i8254_H_ 019 #define _SOS_i8254_H_ 020 021 #include <sos/errno.h> 022 023 /** 024 * @file i8254.h PC programmable timer 025 * 026 * Programmable timer routines. See the Intel 82C54 datasheet (on kos 027 * website). 028 * 029 * @see i82C54 datasheet on Kos website. 030 */ 031 032 /** Change timer interrupt (IRQ 0) frequency */ 033 sos_ret_t sos_i8254_set_frequency(unsigned int freq); 034 035 #endif /* _SOS_i8254_H_ */
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