80 lines
2.1 KiB
C
80 lines
2.1 KiB
C
/*
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ChibiOS/RT - Copyright (C) 2006,2007,2008,2009,2010 Giovanni Di Sirio.
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This file is part of ChibiOS/RT.
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ChibiOS/RT is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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ChibiOS/RT is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "ch.h"
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#include "hal.h"
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#define VAL_TC0_PRESCALER 0
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/*
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* Timer 0 IRQ handling here.
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*/
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static CH_IRQ_HANDLER(T0IrqHandler) {
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CH_IRQ_PROLOGUE();
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T0IR = 1; /* Clear interrupt on match MR0. */
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chSysLockFromIsr();
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chSysTimerHandlerI();
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chSysUnlockFromIsr();
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VICVectAddr = 0;
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CH_IRQ_EPILOGUE();
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}
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/*
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* Early initialization code.
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* This initialization is performed just after reset before BSS and DATA
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* segments initialization.
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*/
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void hwinit0(void) {
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lpc214x_clock_init();
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}
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/*
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* Late initialization code.
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* This initialization is performed after BSS and DATA segments initialization
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* and before invoking the main() function.
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*/
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void hwinit1(void) {
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/*
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* HAL initialization.
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*/
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halInit();
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/*
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* System Timer initialization, 1ms intervals.
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*/
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SetVICVector(T0IrqHandler, 0, SOURCE_Timer0);
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VICIntEnable = INTMASK(SOURCE_Timer0);
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TC *timer = T0Base;
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timer->TC_PR = VAL_TC0_PRESCALER;
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timer->TC_MR0 = (PCLK / CH_FREQUENCY) / (VAL_TC0_PRESCALER + 1);
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timer->TC_MCR = 3; /* Interrupt and clear TC on match MR0. */
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timer->TC_TCR = 2; /* Reset counter and prescaler. */
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timer->TC_TCR = 1; /* Timer enabled. */
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/*
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* ChibiOS/RT initialization.
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*/
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chSysInit();
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}
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