1 files changed, 90 insertions, 0 deletions
diff --git a/wirish/ext_interrupts.cpp b/wirish/ext_interrupts.cpp
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+/******************************************************************************
+ * The MIT License
+ *
+ * Copyright (c) 2010 Perry Hung.
+ * Copyright (c) 2011, 2012 LeafLabs, LLC.
+ *
+ * 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.
+ *****************************************************************************/
+
+/**
+ * @file wirish/ext_interrupts.cpp
+ * @brief Wiring-like interface for external interrupts
+ */
+
+#include <wirish/ext_interrupts.h>
+
+#include <libmaple/gpio.h>
+#include <libmaple/exti.h>
+
+#include <wirish/boards.h>
+
+static inline exti_trigger_mode exti_out_mode(ExtIntTriggerMode mode);
+
+void attachInterrupt(uint8 pin, voidFuncPtr handler, ExtIntTriggerMode mode) {
+    if (pin >= BOARD_NR_GPIO_PINS || !handler) {
+        return;
+    }
+
+    exti_trigger_mode outMode = exti_out_mode(mode);
+
+    exti_attach_interrupt((exti_num)(PIN_MAP[pin].gpio_bit),
+                          gpio_exti_port(PIN_MAP[pin].gpio_device),
+                          handler,
+                          outMode);
+}
+
+void attachInterrupt(uint8 pin, voidArgumentFuncPtr handler, void *arg,
+                     ExtIntTriggerMode mode) {
+    if (pin >= BOARD_NR_GPIO_PINS || !handler) {
+        return;
+    }
+
+    exti_trigger_mode outMode = exti_out_mode(mode);
+
+    exti_attach_callback((exti_num)(PIN_MAP[pin].gpio_bit),
+                          gpio_exti_port(PIN_MAP[pin].gpio_device),
+                          handler,
+                          arg,
+                          outMode);
+}
+
+void detachInterrupt(uint8 pin) {
+    if (pin >= BOARD_NR_GPIO_PINS) {
+        return;
+    }
+
+    exti_detach_interrupt((exti_num)(PIN_MAP[pin].gpio_bit));
+}
+
+static inline exti_trigger_mode exti_out_mode(ExtIntTriggerMode mode) {
+    switch (mode) {
+    case RISING:
+        return EXTI_RISING;
+    case FALLING:
+        return EXTI_FALLING;
+    case CHANGE:
+        return EXTI_RISING_FALLING;
+    }
+    // Can't happen
+    ASSERT(0);
+    return (exti_trigger_mode)0;
+}