t
Fork of mbed-dev by
Diff: targets/TARGET_Atmel/TARGET_SAM_CortexM0P/drivers/sercom/sercom_interrupt.c
- Revision:
- 149:156823d33999
- Parent:
- 15:a81a8d6c1dfe
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/targets/TARGET_Atmel/TARGET_SAM_CortexM0P/drivers/sercom/sercom_interrupt.c Fri Oct 28 11:17:30 2016 +0100 @@ -0,0 +1,140 @@ +/** + * \file + * + * \brief SAM Serial Peripheral Interface Driver + * + * Copyright (C) 2012-2015 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, ~)