nrf5/hal: Adding hal_irq.h which defines a set of static inline functions to do nvic irq operations.

nrf5/hal/hal_irq.h

@@ -0,0 +1,51 @@
+/*
+ * This file is part of the Micro Python project, http://micropython.org/
+ *
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2017 Glenn Ruben Bakke
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+#ifndef HAL_IRQ_H__
+#define HAL_IRQ_H__
+
+#include <stdint.h>
+
+#include "nrf.h"
+
+static inline void hal_irq_clear(uint32_t irq_num) {
+    NVIC_ClearPendingIRQ(irq_num);
+}
+
+static inline void hal_irq_enable(uint32_t irq_num) {
+    hal_irq_clear(irq_num);
+    NVIC_EnableIRQ(irq_num);
+}
+
+static inline void hal_irq_disable(uint32_t irq_num) {
+    NVIC_DisableIRQ(irq_num);
+}
+
+static inline void hal_irq_priority(uint32_t irq_num, uint8_t priority) {
+    NVIC_SetPriority(irq_num, priority);
+}
+
+#endif // HAL_IRQ_H__