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+#ifndef ucoo_hal_exti_exti_stm32_hh
+#define ucoo_hal_exti_exti_stm32_hh
+// ucoolib - Microcontroller object oriented library. {{{
+//
+// Copyright (C) 2015 Nicolas Schodet
+//
+// 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.
+//
+// }}}
+#include "ucoo/intf/exti.hh"
+
+#include <libopencm3/stm32/exti.h>
+
+namespace ucoo {
+
+/// External interrupt on STM32.
+class ExtiHard : public Exti
+{
+ public:
+ enum class Edge
+ {
+ RISING = 1,
+ FALLING = 2,
+ BOTH = 3
+ };
+ public:
+ /// Constructor, take the EXTI number.
+ ExtiHard (int n);
+ /// Constructor, shortcut to set source.
+ ExtiHard (uint32_t gpio_port, int n);
+ /// Constructor, shortcut to set source and trigger.
+ ExtiHard (uint32_t gpio_port, int n, Edge edge);
+ /// Destructor.
+ ~ExtiHard ();
+ /// See Exti::enable.
+ void enable ();
+ /// See Exti::disable.
+ void disable ();
+ /// See Exti::mask.
+ bool mask ();
+ /// See Exti::unmask.
+ void unmask (bool saved_state);
+ /// Set trigger edge.
+ void set_trigger (Edge edge);
+ /// Select source, take GPIO port address.
+ void set_source (uint32_t gpio_port);
+ /// Handle interrupts.
+ void isr ();
+ private:
+ /// EXTI line number.
+ int n_;
+};
+
+inline
+ExtiHard::ExtiHard (uint32_t gpio_port, int n)
+ : ExtiHard (n)
+{
+ set_source (gpio_port);
+}
+
+inline
+ExtiHard::ExtiHard (uint32_t gpio_port, int n, Edge edge)
+ : ExtiHard (gpio_port, n)
+{
+ set_trigger (edge);
+}
+
+} // namespace ucoo
+
+#endif // ucoo_hal_exti_exti_stm32_hh