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-rw-r--r--libmaple/nvic.c59
1 files changed, 59 insertions, 0 deletions
diff --git a/libmaple/nvic.c b/libmaple/nvic.c
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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) {
+// SCB->VTOR = NVIC_VectTab | (Offset & (u32)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);
+ }
+}