80 lines
2.0 KiB
C
80 lines
2.0 KiB
C
|
/*
|
||
|
|
ChibiOS/RT - Copyright (C) 2006-2007 Giovanni Di Sirio.
|
||
|
|
|
||
|
|
This file is part of ChibiOS/RT.
|
||
|
|
|
||
|
|
ChibiOS/RT 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 3 of the License, or
|
||
|
|
(at your option) any later version.
|
||
|
|
|
||
|
|
ChibiOS/RT 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, see <http://www.gnu.org/licenses/>.
|
||
|
|
*/
|
||
|
|
|
||
|
|
#include "ch.h"
|
||
|
|
#include "hal.h"
|
||
|
|
|
||
|
|
#define VAL_TC0_PRESCALER 0
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Timer 0 IRQ handling here.
|
||
|
|
*/
|
||
|
|
static CH_IRQ_HANDLER(T0IrqHandler) {
|
||
|
|
|
||
|
|
CH_IRQ_PROLOGUE();
|
||
|
|
T0IR = 1; /* Clear interrupt on match MR0. */
|
||
|
|
|
||
|
|
chSysLockFromIsr();
|
||
|
|
chSysTimerHandlerI();
|
||
|
|
chSysUnlockFromIsr();
|
||
|
|
|
||
|
|
VICVectAddr = 0;
|
||
|
|
CH_IRQ_EPILOGUE();
|
||
|
|
}
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Early initialization code.
|
||
|
|
* This initialization is performed just after reset before BSS and DATA
|
||
|
|
* segments initialization.
|
||
|
|
*/
|
||
|
|
void hwinit0(void) {
|
||
|
|
|
||
|
|
lpc214x_clock_init();
|
||
|
|
}
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Late initialization code.
|
||
|
|
* This initialization is performed after BSS and DATA segments initialization
|
||
|
|
* and before invoking the main() function.
|
||
|
|
*/
|
||
|
|
void hwinit1(void) {
|
||
|
|
|
||
|
|
/*
|
||
|
|
* HAL initialization.
|
||
|
|
*/
|
||
|
|
halInit();
|
||
|
|
|
||
|
|
/*
|
||
|
|
* System Timer initialization, 1ms intervals.
|
||
|
|
*/
|
||
|
|
SetVICVector(T0IrqHandler, 0, SOURCE_Timer0);
|
||
|
|
VICIntEnable = INTMASK(SOURCE_Timer0);
|
||
|
|
TC *timer = T0Base;
|
||
|
|
timer->TC_PR = VAL_TC0_PRESCALER;
|
||
|
|
timer->TC_MR0 = (PCLK / CH_FREQUENCY) / (VAL_TC0_PRESCALER + 1);
|
||
|
|
timer->TC_MCR = 3; /* Interrupt and clear TC on match MR0. */
|
||
|
|
timer->TC_TCR = 2; /* Reset counter and prescaler. */
|
||
|
|
timer->TC_TCR = 1; /* Timer enabled. */
|
||
|
|
|
||
|
|
/*
|
||
|
|
* ChibiOS/RT initialization.
|
||
|
|
*/
|
||
|
|
chSysInit();
|
||
|
|
}
|