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Last commit 20 Feb 2019 by 
mbed official
targets/hal/TARGET_Atmel/TARGET_SAM21/drivers/sercom/sercom_interrupt.c@579:53297373a894, 2015-07-01 (annotated)
- Committer:
- mbed_official
- Date:
- Wed Jul 01 09:45:11 2015 +0100
- Revision:
- 579:53297373a894
- Child:
- 592:a274ee790e56
Synchronized with git revision d5b4d2ab9c47edb4dc5776e7177b0c2263459081
Full URL: https://github.com/mbedmicro/mbed/commit/d5b4d2ab9c47edb4dc5776e7177b0c2263459081/
Initial version of drivers for SAMR21
Who changed what in which revision?
| User | Revision | Line number | New contents of line |
|---|---|---|---|
| mbed_official | 579:53297373a894 | 1 | /** |
| mbed_official | 579:53297373a894 | 2 | * \file |
| mbed_official | 579:53297373a894 | 3 | * |
| mbed_official | 579:53297373a894 | 4 | * \brief SAM Serial Peripheral Interface Driver |
| mbed_official | 579:53297373a894 | 5 | * |
| mbed_official | 579:53297373a894 | 6 | * Copyright (C) 2012-2014 Atmel Corporation. All rights reserved. |
| mbed_official | 579:53297373a894 | 7 | * |
| mbed_official | 579:53297373a894 | 8 | * \asf_license_start |
| mbed_official | 579:53297373a894 | 9 | * |
| mbed_official | 579:53297373a894 | 10 | * \page License |
| mbed_official | 579:53297373a894 | 11 | * |
| mbed_official | 579:53297373a894 | 12 | * Redistribution and use in source and binary forms, with or without |
| mbed_official | 579:53297373a894 | 13 | * modification, are permitted provided that the following conditions are met: |
| mbed_official | 579:53297373a894 | 14 | * |
| mbed_official | 579:53297373a894 | 15 | * 1. Redistributions of source code must retain the above copyright notice, |
| mbed_official | 579:53297373a894 | 16 | * this list of conditions and the following disclaimer. |
| mbed_official | 579:53297373a894 | 17 | * |
| mbed_official | 579:53297373a894 | 18 | * 2. Redistributions in binary form must reproduce the above copyright notice, |
| mbed_official | 579:53297373a894 | 19 | * this list of conditions and the following disclaimer in the documentation |
| mbed_official | 579:53297373a894 | 20 | * and/or other materials provided with the distribution. |
| mbed_official | 579:53297373a894 | 21 | * |
| mbed_official | 579:53297373a894 | 22 | * 3. The name of Atmel may not be used to endorse or promote products derived |
| mbed_official | 579:53297373a894 | 23 | * from this software without specific prior written permission. |
| mbed_official | 579:53297373a894 | 24 | * |
| mbed_official | 579:53297373a894 | 25 | * 4. This software may only be redistributed and used in connection with an |
| mbed_official | 579:53297373a894 | 26 | * Atmel microcontroller product. |
| mbed_official | 579:53297373a894 | 27 | * |
| mbed_official | 579:53297373a894 | 28 | * THIS SOFTWARE IS PROVIDED BY ATMEL "AS IS" AND ANY EXPRESS OR IMPLIED |
| mbed_official | 579:53297373a894 | 29 | * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF |
| mbed_official | 579:53297373a894 | 30 | * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT ARE |
| mbed_official | 579:53297373a894 | 31 | * EXPRESSLY AND SPECIFICALLY DISCLAIMED. IN NO EVENT SHALL ATMEL BE LIABLE FOR |
| mbed_official | 579:53297373a894 | 32 | * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| mbed_official | 579:53297373a894 | 33 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
| mbed_official | 579:53297373a894 | 34 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| mbed_official | 579:53297373a894 | 35 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, |
| mbed_official | 579:53297373a894 | 36 | * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN |
| mbed_official | 579:53297373a894 | 37 | * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
| mbed_official | 579:53297373a894 | 38 | * POSSIBILITY OF SUCH DAMAGE. |
| mbed_official | 579:53297373a894 | 39 | * |
| mbed_official | 579:53297373a894 | 40 | * \asf_license_stop |
| mbed_official | 579:53297373a894 | 41 | * |
| mbed_official | 579:53297373a894 | 42 | */ |
| mbed_official | 579:53297373a894 | 43 | /** |
| mbed_official | 579:53297373a894 | 44 | * Support and FAQ: visit <a href="http://www.atmel.com/design-support/">Atmel Support</a> |
| mbed_official | 579:53297373a894 | 45 | */ |
| mbed_official | 579:53297373a894 | 46 | #include "sercom_interrupt.h" |
| mbed_official | 579:53297373a894 | 47 | |
| mbed_official | 579:53297373a894 | 48 | void *_sercom_instances[SERCOM_INST_NUM]; |
| mbed_official | 579:53297373a894 | 49 | |
| mbed_official | 579:53297373a894 | 50 | /** Save status of initialized handlers. */ |
| mbed_official | 579:53297373a894 | 51 | static bool _handler_table_initialized = false; |
| mbed_official | 579:53297373a894 | 52 | |
| mbed_official | 579:53297373a894 | 53 | /** Void pointers for saving device instance structures. */ |
| mbed_official | 579:53297373a894 | 54 | static void (*_sercom_interrupt_handlers[SERCOM_INST_NUM])(const uint8_t instance); |
| mbed_official | 579:53297373a894 | 55 | |
| mbed_official | 579:53297373a894 | 56 | /** |
| mbed_official | 579:53297373a894 | 57 | * \internal |
| mbed_official | 579:53297373a894 | 58 | * Default interrupt handler. |
| mbed_official | 579:53297373a894 | 59 | * |
| mbed_official | 579:53297373a894 | 60 | * \param[in] instance SERCOM instance used. |
| mbed_official | 579:53297373a894 | 61 | */ |
| mbed_official | 579:53297373a894 | 62 | static void _sercom_default_handler( |
| mbed_official | 579:53297373a894 | 63 | const uint8_t instance) |
| mbed_official | 579:53297373a894 | 64 | { |
| mbed_official | 579:53297373a894 | 65 | Assert(false); |
| mbed_official | 579:53297373a894 | 66 | } |
| mbed_official | 579:53297373a894 | 67 | |
| mbed_official | 579:53297373a894 | 68 | /** |
| mbed_official | 579:53297373a894 | 69 | * \internal |
| mbed_official | 579:53297373a894 | 70 | * Saves the given callback handler. |
| mbed_official | 579:53297373a894 | 71 | * |
| mbed_official | 579:53297373a894 | 72 | * \param[in] instance Instance index. |
| mbed_official | 579:53297373a894 | 73 | * \param[in] interrupt_handler Pointer to instance callback handler. |
| mbed_official | 579:53297373a894 | 74 | */ |
| mbed_official | 579:53297373a894 | 75 | void _sercom_set_handler( |
| mbed_official | 579:53297373a894 | 76 | const uint8_t instance, |
| mbed_official | 579:53297373a894 | 77 | const sercom_handler_t interrupt_handler) |
| mbed_official | 579:53297373a894 | 78 | { |
| mbed_official | 579:53297373a894 | 79 | /* Initialize handlers with default handler and device instances with 0. */ |
| mbed_official | 579:53297373a894 | 80 | if (_handler_table_initialized == false) { |
| mbed_official | 579:53297373a894 | 81 | for (uint32_t i = 0; i < SERCOM_INST_NUM; i++) { |
| mbed_official | 579:53297373a894 | 82 | _sercom_interrupt_handlers[i] = &_sercom_default_handler; |
| mbed_official | 579:53297373a894 | 83 | _sercom_instances[i] = NULL; |
| mbed_official | 579:53297373a894 | 84 | } |
| mbed_official | 579:53297373a894 | 85 | |
| mbed_official | 579:53297373a894 | 86 | _handler_table_initialized = true; |
| mbed_official | 579:53297373a894 | 87 | } |
| mbed_official | 579:53297373a894 | 88 | |
| mbed_official | 579:53297373a894 | 89 | /* Save interrupt handler. */ |
| mbed_official | 579:53297373a894 | 90 | _sercom_interrupt_handlers[instance] = interrupt_handler; |
| mbed_official | 579:53297373a894 | 91 | } |
| mbed_official | 579:53297373a894 | 92 | |
| mbed_official | 579:53297373a894 | 93 | |
| mbed_official | 579:53297373a894 | 94 | /** \internal |
| mbed_official | 579:53297373a894 | 95 | * Converts a given SERCOM index to its interrupt vector index. |
| mbed_official | 579:53297373a894 | 96 | */ |
| mbed_official | 579:53297373a894 | 97 | #define _SERCOM_INTERRUPT_VECT_NUM(n, unused) \ |
| mbed_official | 579:53297373a894 | 98 | SYSTEM_INTERRUPT_MODULE_SERCOM##n, |
| mbed_official | 579:53297373a894 | 99 | |
| mbed_official | 579:53297373a894 | 100 | /** \internal |
| mbed_official | 579:53297373a894 | 101 | * Generates a SERCOM interrupt handler function for a given SERCOM index. |
| mbed_official | 579:53297373a894 | 102 | */ |
| mbed_official | 579:53297373a894 | 103 | #define _SERCOM_INTERRUPT_HANDLER(n, unused) \ |
| mbed_official | 579:53297373a894 | 104 | void SERCOM##n##_Handler(void) \ |
| mbed_official | 579:53297373a894 | 105 | { \ |
| mbed_official | 579:53297373a894 | 106 | _sercom_interrupt_handlers[n](n); \ |
| mbed_official | 579:53297373a894 | 107 | } |
| mbed_official | 579:53297373a894 | 108 | |
| mbed_official | 579:53297373a894 | 109 | /** |
| mbed_official | 579:53297373a894 | 110 | * \internal |
| mbed_official | 579:53297373a894 | 111 | * Returns the system interrupt vector. |
| mbed_official | 579:53297373a894 | 112 | * |
| mbed_official | 579:53297373a894 | 113 | * \param[in] sercom_instance Instance pointer |
| mbed_official | 579:53297373a894 | 114 | * |
| mbed_official | 579:53297373a894 | 115 | * \return Enum of system interrupt vector |
| mbed_official | 579:53297373a894 | 116 | * \retval SYSTEM_INTERRUPT_MODULE_SERCOM0 |
| mbed_official | 579:53297373a894 | 117 | * \retval SYSTEM_INTERRUPT_MODULE_SERCOM1 |
| mbed_official | 579:53297373a894 | 118 | * \retval SYSTEM_INTERRUPT_MODULE_SERCOM2 |
| mbed_official | 579:53297373a894 | 119 | * \retval SYSTEM_INTERRUPT_MODULE_SERCOM3 |
| mbed_official | 579:53297373a894 | 120 | * \retval SYSTEM_INTERRUPT_MODULE_SERCOM4 |
| mbed_official | 579:53297373a894 | 121 | * \retval SYSTEM_INTERRUPT_MODULE_SERCOM5 |
| mbed_official | 579:53297373a894 | 122 | * \retval SYSTEM_INTERRUPT_MODULE_SERCOM6 |
| mbed_official | 579:53297373a894 | 123 | * \retval SYSTEM_INTERRUPT_MODULE_SERCOM7 |
| mbed_official | 579:53297373a894 | 124 | */ |
| mbed_official | 579:53297373a894 | 125 | enum system_interrupt_vector _sercom_get_interrupt_vector( |
| mbed_official | 579:53297373a894 | 126 | Sercom *const sercom_instance) |
| mbed_official | 579:53297373a894 | 127 | { |
| mbed_official | 579:53297373a894 | 128 | const uint8_t sercom_int_vectors[SERCOM_INST_NUM] = { |
| mbed_official | 579:53297373a894 | 129 | MREPEAT(SERCOM_INST_NUM, _SERCOM_INTERRUPT_VECT_NUM, ~) |
| mbed_official | 579:53297373a894 | 130 | }; |
| mbed_official | 579:53297373a894 | 131 | |
| mbed_official | 579:53297373a894 | 132 | /* Retrieve the index of the SERCOM being requested */ |
| mbed_official | 579:53297373a894 | 133 | uint8_t instance_index = _sercom_get_sercom_inst_index(sercom_instance); |
| mbed_official | 579:53297373a894 | 134 | |
| mbed_official | 579:53297373a894 | 135 | /* Get the vector number from the lookup table for the requested SERCOM */ |
| mbed_official | 579:53297373a894 | 136 | return (enum system_interrupt_vector)sercom_int_vectors[instance_index]; |
| mbed_official | 579:53297373a894 | 137 | } |
| mbed_official | 579:53297373a894 | 138 | |
| mbed_official | 579:53297373a894 | 139 | /** Auto-generate a set of interrupt handlers for each SERCOM in the device */ |
| mbed_official | 579:53297373a894 | 140 | MREPEAT(SERCOM_INST_NUM, _SERCOM_INTERRUPT_HANDLER, ~) |
