Diff: cpp/InterruptIn.cpp

Revision:

0:fd0d7bdfcdc2

Child:

2:143cac498751

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/cpp/InterruptIn.cpp	Tue Nov 20 17:24:08 2012 +0000
@@ -0,0 +1,83 @@
+/* mbed Microcontroller Library
+ * Copyright (c) 2006-2012 ARM Limited
+ *
+ * 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 "InterruptIn.h"
+
+#if DEVICE_INTERRUPTIN
+
+#include "error.h"
+
+namespace mbed {
+
+InterruptIn::InterruptIn(PinName pin) {
+    if (gpio_irq_init(&gpio_irq, pin, (&InterruptIn::_irq_handler), (uint32_t)this) != 0)
+        error("[ERROR] InterruptIn init\n");
+    gpio_init(&gpio, pin, PIN_INPUT);
+}
+
+InterruptIn::~InterruptIn() {
+    gpio_irq_free(&gpio_irq);
+}
+
+int InterruptIn::read() { 
+    return gpio_read(&gpio);
+}
+
+void InterruptIn::mode(PinMode pull) {
+    gpio_mode(&gpio, pull);
+}
+
+void InterruptIn::rise(void (*fptr)(void)) {
+    if (fptr) {
+        _rise.attach(fptr);
+        gpio_irq_set(&gpio_irq, IRQ_RISE, 1);
+    } else {
+        gpio_irq_set(&gpio_irq, IRQ_RISE, 0);
+    }
+}
+
+void InterruptIn::fall(void (*fptr)(void)) {
+    if (fptr) {
+        _fall.attach(fptr);
+        gpio_irq_set(&gpio_irq, IRQ_FALL, 1);
+    } else {
+        gpio_irq_set(&gpio_irq, IRQ_FALL, 0);
+    }
+}
+
+void InterruptIn::_irq_handler(uint32_t id, gpio_irq_event event) {
+    InterruptIn *handler = (InterruptIn*)id;
+    switch (event) {
+        case IRQ_RISE: handler->_rise.call(); break;
+        case IRQ_FALL: handler->_fall.call(); break;
+        case IRQ_NONE: break;
+    }
+}
+
+#ifdef MBED_OPERATORS
+InterruptIn::operator int() {
+    return read();
+}
+#endif
+
+} // namespace mbed
+
+#endif