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/* *****************************************************************************
* This program 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.
*
* 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 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/>.
*
* Created: 12/18/09 02:36:19
* Copyright (c) 2009 Perry L. Hung. All rights reserved.
*
* ****************************************************************************/
/**
* @file nvic.c
*
* @brief Nested interrupt controller routines
*/
#include "libmaple.h"
#include "nvic.h"
#include "systick.h"
void nvic_disable_interrupts(void) {
/* Turn off all interrupts */
REG_SET(NVIC_ICER0, 0xFFFFFFFF);
REG_SET(NVIC_ICER1, 0xFFFFFFFF);
/* Turn off systick exception */
REG_CLEAR_BIT(SYSTICK_CSR, 0);
}
void nvic_set_vector_table(uint32_t *addr, uint32_t offset) {
__write(SCB_VTOR, (uint32_t)addr | (offset & 0x1FFFFF80));
}
/**
* @brief turn on interrupt number n
* @param[in] n interrupt number
*/
void nvic_enable_interrupt(uint32 n) {
if (n >= NVIC_NR_INTERRUPTS) {
return;
}
if (n < 32) {
REG_SET_BIT(NVIC_ISER0, n);
} else {
REG_SET_BIT(NVIC_ISER1, n - 32);
}
}
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