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/*
ChibiOS/RT - Copyright (C) 2006,2007,2008,2009,2010,
2011 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"
/**
* @brief PAL setup.
* @details Digital I/O ports static configuration as defined in @p board.h.
*/
#if HAL_USE_PAL || defined(__DOXYGEN__)
ROMCONST PALConfig pal_default_config =
{
{
{VAL_GPIOAODR, 0, VAL_GPIOADDR, VAL_GPIOACR1, VAL_GPIOACR2},
{VAL_GPIOBODR, 0, VAL_GPIOBDDR, VAL_GPIOBCR1, VAL_GPIOBCR2},
{VAL_GPIOCODR, 0, VAL_GPIOCDDR, VAL_GPIOCCR1, VAL_GPIOCCR2},
{VAL_GPIODODR, 0, VAL_GPIODDDR, VAL_GPIODCR1, VAL_GPIODCR2},
{VAL_GPIOEODR, 0, VAL_GPIOEDDR, VAL_GPIOECR1, VAL_GPIOECR2},
{VAL_GPIOFODR, 0, VAL_GPIOFDDR, VAL_GPIOFCR1, VAL_GPIOFCR2},
{VAL_GPIOGODR, 0, VAL_GPIOGDDR, VAL_GPIOGCR1, VAL_GPIOGCR2},
}
};
#endif
/*
* TIM 2 clock after the prescaler.
*/
#define TIM2_CLOCK (SYSCLK / 16)
#define TIM2_ARR ((TIM2_CLOCK / CH_FREQUENCY) - 1)
/*
* TIM2 interrupt handler.
*/
CH_IRQ_HANDLER(13) {
CH_IRQ_PROLOGUE();
chSysLockFromIsr();
chSysTimerHandlerI();
chSysUnlockFromIsr();
TIM2->SR1 = 0;
CH_IRQ_EPILOGUE();
}
/*
* Board-specific initialization code.
*/
void boardInit(void) {
/*
* TIM2 initialization as system tick.
*/
CLK->PCKENR1 |= CLK_PCKENR1_TIM2;
TIM2->PSCR = 4; /* Prescaler divide by 2^4=16.*/
TIM2->ARRH = (uint8_t)(TIM2_ARR >> 8);
TIM2->ARRL = (uint8_t)(TIM2_ARR);
TIM2->CNTRH = 0;
TIM2->CNTRL = 0;
TIM2->SR1 = 0;
TIM2->IER = TIM2_IER_UIE;
TIM2->CR1 = TIM2_CR1_CEN;
}
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