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