Diff: targets/hal/TARGET_Atmel/TARGET_SAM21/drivers/sercom/sercom_interrupt.c

Revision:

579:53297373a894

Child:

592:a274ee790e56

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/targets/hal/TARGET_Atmel/TARGET_SAM21/drivers/sercom/sercom_interrupt.c	Wed Jul 01 09:45:11 2015 +0100
@@ -0,0 +1,140 @@
+/**
+ * \file
+ *
+ * \brief SAM Serial Peripheral Interface Driver
+ *
+ * Copyright (C) 2012-2014 Atmel Corporation. All rights reserved.
+ *
+ * \asf_license_start
+ *
+ * \page License
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ *
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ *
+ * 3. The name of Atmel may not be used to endorse or promote products derived
+ *    from this software without specific prior written permission.
+ *
+ * 4. This software may only be redistributed and used in connection with an
+ *    Atmel microcontroller product.
+ *
+ * THIS SOFTWARE IS PROVIDED BY ATMEL "AS IS" AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT ARE
+ * EXPRESSLY AND SPECIFICALLY DISCLAIMED. IN NO EVENT SHALL ATMEL BE LIABLE FOR
+ * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+ * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+ * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *
+ * \asf_license_stop
+ *
+ */
+/**
+* Support and FAQ: visit <a href="http://www.atmel.com/design-support/">Atmel Support</a>
+*/
+#include "sercom_interrupt.h"
+
+void *_sercom_instances[SERCOM_INST_NUM];
+
+/** Save status of initialized handlers. */
+static bool _handler_table_initialized = false;
+
+/** Void pointers for saving device instance structures. */
+static void (*_sercom_interrupt_handlers[SERCOM_INST_NUM])(const uint8_t instance);
+
+/**
+ * \internal
+ * Default interrupt handler.
+ *
+ * \param[in] instance SERCOM instance used.
+ */
+static void _sercom_default_handler(
+    const uint8_t instance)
+{
+    Assert(false);
+}
+
+/**
+ * \internal
+ * Saves the given callback handler.
+ *
+ * \param[in]  instance           Instance index.
+ * \param[in]  interrupt_handler  Pointer to instance callback handler.
+ */
+void _sercom_set_handler(
+    const uint8_t instance,
+    const sercom_handler_t interrupt_handler)
+{
+    /* Initialize handlers with default handler and device instances with 0. */
+    if (_handler_table_initialized == false) {
+        for (uint32_t i = 0; i < SERCOM_INST_NUM; i++) {
+            _sercom_interrupt_handlers[i] = &_sercom_default_handler;
+            _sercom_instances[i] = NULL;
+        }
+
+        _handler_table_initialized = true;
+    }
+
+    /* Save interrupt handler. */
+    _sercom_interrupt_handlers[instance] = interrupt_handler;
+}
+
+
+/** \internal
+ * Converts a given SERCOM index to its interrupt vector index.
+ */
+#define _SERCOM_INTERRUPT_VECT_NUM(n, unused) \
+		SYSTEM_INTERRUPT_MODULE_SERCOM##n,
+
+/** \internal
+ * Generates a SERCOM interrupt handler function for a given SERCOM index.
+ */
+#define _SERCOM_INTERRUPT_HANDLER(n, unused) \
+		void SERCOM##n##_Handler(void) \
+		{ \
+			_sercom_interrupt_handlers[n](n); \
+		}
+
+/**
+ * \internal
+ * Returns the system interrupt vector.
+ *
+ * \param[in]  sercom_instance  Instance pointer
+ *
+ * \return Enum of system interrupt vector
+ * \retval SYSTEM_INTERRUPT_MODULE_SERCOM0
+ * \retval SYSTEM_INTERRUPT_MODULE_SERCOM1
+ * \retval SYSTEM_INTERRUPT_MODULE_SERCOM2
+ * \retval SYSTEM_INTERRUPT_MODULE_SERCOM3
+ * \retval SYSTEM_INTERRUPT_MODULE_SERCOM4
+ * \retval SYSTEM_INTERRUPT_MODULE_SERCOM5
+ * \retval SYSTEM_INTERRUPT_MODULE_SERCOM6
+ * \retval SYSTEM_INTERRUPT_MODULE_SERCOM7
+ */
+enum system_interrupt_vector _sercom_get_interrupt_vector(
+    Sercom *const sercom_instance)
+{
+    const uint8_t sercom_int_vectors[SERCOM_INST_NUM] = {
+        MREPEAT(SERCOM_INST_NUM, _SERCOM_INTERRUPT_VECT_NUM, ~)
+    };
+
+    /* Retrieve the index of the SERCOM being requested */
+    uint8_t instance_index = _sercom_get_sercom_inst_index(sercom_instance);
+
+    /* Get the vector number from the lookup table for the requested SERCOM */
+    return (enum system_interrupt_vector)sercom_int_vectors[instance_index];
+}
+
+/** Auto-generate a set of interrupt handlers for each SERCOM in the device */
+MREPEAT(SERCOM_INST_NUM, _SERCOM_INTERRUPT_HANDLER, ~)