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authorPerry Hung <iperry@alum.mit.edu>2010-03-30 22:03:00 -0400
committerPerry Hung <iperry@alum.mit.edu>2010-03-30 22:03:00 -0400
commit2c33d55bae8f9e0e009634072ab05302fc734a65 (patch)
tree63285f96e795fc423cd5bf573340d12f6c8d5513 /core/ext_interrupts.c
parent23149e9706ff0a6a338e13804456dff4c655e34b (diff)
parent1d3861ef93f8423176c6010ab606abdab00a7cbd (diff)
downloadlibrambutan-2c33d55bae8f9e0e009634072ab05302fc734a65.tar.gz
librambutan-2c33d55bae8f9e0e009634072ab05302fc734a65.zip
Merge branch 'master' into rcc-dev
Conflicts: Makefile
Diffstat (limited to 'core/ext_interrupts.c')
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diff --git a/core/ext_interrupts.c b/core/ext_interrupts.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 02:39:48
+ * Copyright (c) 2009 Perry L. Hung. All rights reserved.
+ *
+ * ****************************************************************************/
+
+/**
+ * @file ext_interrupts.c
+ *
+ * @brief Wiring-like interface for external interrupts
+ */
+
+#include "wiring.h"
+#include "exti.h"
+#include "ext_interrupts.h"
+
+typedef struct ExtiInfo {
+ uint8_t channel;
+ uint8_t port;
+} ExtiInfo;
+
+static ExtiInfo PIN_TO_EXTI_CHANNEL[NR_MAPLE_PINS] = {
+ {EXTI3, EXTI_CONFIG_PORTA}, // D0/PA3
+ {EXTI2, EXTI_CONFIG_PORTA}, // D1/PA2
+ {EXTI0, EXTI_CONFIG_PORTA}, // D2/PA0
+ {EXTI1, EXTI_CONFIG_PORTA}, // D3/PA1
+ {EXTI5, EXTI_CONFIG_PORTB}, // D4/PB5
+ {EXTI6, EXTI_CONFIG_PORTB}, // D5/PB6
+ {EXTI8, EXTI_CONFIG_PORTA}, // D6/PA8
+ {EXTI9, EXTI_CONFIG_PORTA}, // D7/PA9
+ {EXTI10, EXTI_CONFIG_PORTA}, // D8/PA10
+ {EXTI7, EXTI_CONFIG_PORTB}, // D9/PB7
+ {EXTI4, EXTI_CONFIG_PORTA}, // D10/PA4
+ {EXTI7, EXTI_CONFIG_PORTA}, // D11/PA7
+ {EXTI6, EXTI_CONFIG_PORTA}, // D12/PA6
+ {EXTI5, EXTI_CONFIG_PORTA}, // D13/PA5
+};
+
+
+/**
+ * @brief Attach an interrupt handler to be triggered on a given
+ * transition on the pin. Runs in interrupt context
+ *
+ * @param[in] pin Maple pin number
+ * @param[in] handler Function to run upon external interrupt trigger.
+ * @param[in] mode Type of transition to trigger on, eg falling, rising, etc.
+ *
+ * @sideeffect Registers a handler
+ */
+int attachInterrupt(uint8_t pin, voidFuncPtr handler, ExtInterruptTriggerMode mode) {
+ uint8_t outMode;
+ /* Parameter checking */
+ if (pin >= NR_MAPLE_PINS) {
+ return EXT_INTERRUPT_INVALID_PIN;
+ }
+
+ if (!handler) {
+ ASSERT(0);
+ return EXT_INTERRUPT_INVALID_FUNCTION;
+ }
+
+ switch (mode) {
+ case RISING:
+ outMode = EXTI_RISING;
+ break;
+ case FALLING:
+ outMode = EXTI_FALLING;
+ break;
+ case CHANGE:
+ outMode = EXTI_RISING_FALLING;
+ break;
+ default:
+ ASSERT(0);
+ return EXT_INTERRUPT_INVALID_MODE;;
+ }
+
+ exti_attach_interrupt(PIN_TO_EXTI_CHANNEL[pin].channel,
+ PIN_TO_EXTI_CHANNEL[pin].port,
+ handler, mode);
+
+ return 0;
+}
+
+int detachInterrupt(uint8_t pin) {
+ if (!(pin < NR_MAPLE_PINS)) {
+ return EXT_INTERRUPT_INVALID_PIN;
+ }
+
+ exti_detach_interrupt(PIN_TO_EXTI_CHANNEL[pin].channel);
+}
+