?? timerinit.c
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/* Copyright 2001, 2002 Georges Menie (www.menie.org) This program is free software; you can redistribute it and/or modify it under the terms of the GNU Lesser 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 Lesser General Public License for more details. You should have received a copy of the GNU Lesser 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*/#include "timer.h"#include "68vz328.h"#include "io.h"/* initialize the processor's timer register * on a 33MHz 68vz328 board, this initialize a 1us resolution timer */void timerInit (void){ /* disable Timer 1 */ writew (0, TCTL1); /* init Timer 1 */ writew ((1 << 8) | (1 << 1), TCTL1); /* Free running, SYSCLK, no IRQ */ writew (33, TPRER1); /* -> 1 us ticks */ /* enable Timer 1 */ orw (1, TCTL1);}
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