Sergey Solodunov / mbed-dev

mbed library sources. Supersedes mbed-src.

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targets/hal/TARGET_Atmel/TARGET_SAM_CortexM0P/drivers/extint/extint_callback.c@144:423e1876dc07, 2016-08-02 (annotated)

Committer:
screamer
Date:
Tue Aug 02 14:07:36 2016 +0000
Revision:
144:423e1876dc07
Parent:
15:a81a8d6c1dfe 
Added targets.json file for the supported targets in the release

Who changed what in which revision?

UserRevisionLine numberNew contents of line
mbed_official 15:a81a8d6c1dfe 1 /**
mbed_official 15:a81a8d6c1dfe 2 * \file
mbed_official 15:a81a8d6c1dfe 3 *
mbed_official 15:a81a8d6c1dfe 4 * \brief SAM External Interrupt Driver
mbed_official 15:a81a8d6c1dfe 5 *
mbed_official 15:a81a8d6c1dfe 6 * Copyright (C) 2012-2015 Atmel Corporation. All rights reserved.
mbed_official 15:a81a8d6c1dfe 7 *
mbed_official 15:a81a8d6c1dfe 8 * \asf_license_start
mbed_official 15:a81a8d6c1dfe 9 *
mbed_official 15:a81a8d6c1dfe 10 * \page License
mbed_official 15:a81a8d6c1dfe 11 *
mbed_official 15:a81a8d6c1dfe 12 * Redistribution and use in source and binary forms, with or without
mbed_official 15:a81a8d6c1dfe 13 * modification, are permitted provided that the following conditions are met:
mbed_official 15:a81a8d6c1dfe 14 *
mbed_official 15:a81a8d6c1dfe 15 * 1. Redistributions of source code must retain the above copyright notice,
mbed_official 15:a81a8d6c1dfe 16 * this list of conditions and the following disclaimer.
mbed_official 15:a81a8d6c1dfe 17 *
mbed_official 15:a81a8d6c1dfe 18 * 2. Redistributions in binary form must reproduce the above copyright notice,
mbed_official 15:a81a8d6c1dfe 19 * this list of conditions and the following disclaimer in the documentation
mbed_official 15:a81a8d6c1dfe 20 * and/or other materials provided with the distribution.
mbed_official 15:a81a8d6c1dfe 21 *
mbed_official 15:a81a8d6c1dfe 22 * 3. The name of Atmel may not be used to endorse or promote products derived
mbed_official 15:a81a8d6c1dfe 23 * from this software without specific prior written permission.
mbed_official 15:a81a8d6c1dfe 24 *
mbed_official 15:a81a8d6c1dfe 25 * 4. This software may only be redistributed and used in connection with an
mbed_official 15:a81a8d6c1dfe 26 * Atmel microcontroller product.
mbed_official 15:a81a8d6c1dfe 27 *
mbed_official 15:a81a8d6c1dfe 28 * THIS SOFTWARE IS PROVIDED BY ATMEL "AS IS" AND ANY EXPRESS OR IMPLIED
mbed_official 15:a81a8d6c1dfe 29 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
mbed_official 15:a81a8d6c1dfe 30 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT ARE
mbed_official 15:a81a8d6c1dfe 31 * EXPRESSLY AND SPECIFICALLY DISCLAIMED. IN NO EVENT SHALL ATMEL BE LIABLE FOR
mbed_official 15:a81a8d6c1dfe 32 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
mbed_official 15:a81a8d6c1dfe 33 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
mbed_official 15:a81a8d6c1dfe 34 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
mbed_official 15:a81a8d6c1dfe 35 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
mbed_official 15:a81a8d6c1dfe 36 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
mbed_official 15:a81a8d6c1dfe 37 * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
mbed_official 15:a81a8d6c1dfe 38 * POSSIBILITY OF SUCH DAMAGE.
mbed_official 15:a81a8d6c1dfe 39 *
mbed_official 15:a81a8d6c1dfe 40 * \asf_license_stop
mbed_official 15:a81a8d6c1dfe 41 *
mbed_official 15:a81a8d6c1dfe 42 */
mbed_official 15:a81a8d6c1dfe 43 /*
mbed_official 15:a81a8d6c1dfe 44 * Support and FAQ: visit <a href="http://www.atmel.com/design-support/">Atmel Support</a>
mbed_official 15:a81a8d6c1dfe 45 */
mbed_official 15:a81a8d6c1dfe 46 #include "extint.h"
mbed_official 15:a81a8d6c1dfe 47 #include "extint_callback.h"
mbed_official 15:a81a8d6c1dfe 48
mbed_official 15:a81a8d6c1dfe 49 /**
mbed_official 15:a81a8d6c1dfe 50 * \internal
mbed_official 15:a81a8d6c1dfe 51 * Internal driver device instance struct, declared in the main module driver.
mbed_official 15:a81a8d6c1dfe 52 */
mbed_official 15:a81a8d6c1dfe 53 extern struct _extint_module _extint_dev;
mbed_official 15:a81a8d6c1dfe 54
mbed_official 15:a81a8d6c1dfe 55 /**
mbed_official 15:a81a8d6c1dfe 56 * \internal
mbed_official 15:a81a8d6c1dfe 57 * This is the number of the channel whose callback is currently running.
mbed_official 15:a81a8d6c1dfe 58 */
mbed_official 15:a81a8d6c1dfe 59 uint8_t _current_channel;
mbed_official 15:a81a8d6c1dfe 60
mbed_official 15:a81a8d6c1dfe 61 /**
mbed_official 15:a81a8d6c1dfe 62 * \brief Registers an asynchronous callback function with the driver.
mbed_official 15:a81a8d6c1dfe 63 *
mbed_official 15:a81a8d6c1dfe 64 * Registers an asynchronous callback with the EXTINT driver, fired when a
mbed_official 15:a81a8d6c1dfe 65 * channel detects the configured channel detection criteria
mbed_official 15:a81a8d6c1dfe 66 * (e.g. edge or level). Callbacks are fired once for each detected channel.
mbed_official 15:a81a8d6c1dfe 67 *
mbed_official 15:a81a8d6c1dfe 68 * \note NMI channel callbacks cannot be registered via this function; the
mbed_official 15:a81a8d6c1dfe 69 * device's NMI interrupt should be hooked directly in the user
mbed_official 15:a81a8d6c1dfe 70 * application and the NMI flags manually cleared via
mbed_official 15:a81a8d6c1dfe 71 * \ref extint_nmi_clear_detected().
mbed_official 15:a81a8d6c1dfe 72 *
mbed_official 15:a81a8d6c1dfe 73 * \param[in] callback Pointer to the callback function to register
mbed_official 15:a81a8d6c1dfe 74 * \param[in] channel Logical channel to register callback for
mbed_official 15:a81a8d6c1dfe 75 * \param[in] type Type of callback function to register
mbed_official 15:a81a8d6c1dfe 76 *
mbed_official 15:a81a8d6c1dfe 77 * \return Status of the registration operation.
mbed_official 15:a81a8d6c1dfe 78 * \retval STATUS_OK The callback was registered successfully
mbed_official 15:a81a8d6c1dfe 79 * \retval STATUS_ERR_INVALID_ARG If an invalid callback type was supplied
mbed_official 15:a81a8d6c1dfe 80 * \retval STATUS_ERR_ALREADY_INITIALIZED Callback function has been
mbed_official 15:a81a8d6c1dfe 81 * registered, need unregister first
mbed_official 15:a81a8d6c1dfe 82 */
mbed_official 15:a81a8d6c1dfe 83 enum status_code extint_register_callback(
mbed_official 15:a81a8d6c1dfe 84 const extint_callback_t callback,
mbed_official 15:a81a8d6c1dfe 85 const uint8_t channel,
mbed_official 15:a81a8d6c1dfe 86 const enum extint_callback_type type)
mbed_official 15:a81a8d6c1dfe 87 {
mbed_official 15:a81a8d6c1dfe 88 /* Sanity check arguments */
mbed_official 15:a81a8d6c1dfe 89 Assert(callback);
mbed_official 15:a81a8d6c1dfe 90
mbed_official 15:a81a8d6c1dfe 91 if (type != EXTINT_CALLBACK_TYPE_DETECT) {
mbed_official 15:a81a8d6c1dfe 92 Assert(false);
mbed_official 15:a81a8d6c1dfe 93 return STATUS_ERR_INVALID_ARG;
mbed_official 15:a81a8d6c1dfe 94 }
mbed_official 15:a81a8d6c1dfe 95
mbed_official 15:a81a8d6c1dfe 96 if (_extint_dev.callbacks[channel] == NULL) {
mbed_official 15:a81a8d6c1dfe 97 _extint_dev.callbacks[channel] = callback;
mbed_official 15:a81a8d6c1dfe 98 return STATUS_OK;
mbed_official 15:a81a8d6c1dfe 99 } else if (_extint_dev.callbacks[channel] == callback) {
mbed_official 15:a81a8d6c1dfe 100 return STATUS_OK;
mbed_official 15:a81a8d6c1dfe 101 }
mbed_official 15:a81a8d6c1dfe 102
mbed_official 15:a81a8d6c1dfe 103 return STATUS_ERR_ALREADY_INITIALIZED;
mbed_official 15:a81a8d6c1dfe 104 }
mbed_official 15:a81a8d6c1dfe 105
mbed_official 15:a81a8d6c1dfe 106 /**
mbed_official 15:a81a8d6c1dfe 107 * \brief Unregisters an asynchronous callback function with the driver.
mbed_official 15:a81a8d6c1dfe 108 *
mbed_official 15:a81a8d6c1dfe 109 * Unregisters an asynchronous callback with the EXTINT driver, removing it
mbed_official 15:a81a8d6c1dfe 110 * from the internal callback registration table.
mbed_official 15:a81a8d6c1dfe 111 *
mbed_official 15:a81a8d6c1dfe 112 * \param[in] callback Pointer to the callback function to unregister
mbed_official 15:a81a8d6c1dfe 113 * \param[in] channel Logical channel to unregister callback for
mbed_official 15:a81a8d6c1dfe 114 * \param[in] type Type of callback function to unregister
mbed_official 15:a81a8d6c1dfe 115 *
mbed_official 15:a81a8d6c1dfe 116 * \return Status of the de-registration operation.
mbed_official 15:a81a8d6c1dfe 117 * \retval STATUS_OK The callback was Unregistered successfully
mbed_official 15:a81a8d6c1dfe 118 * \retval STATUS_ERR_INVALID_ARG If an invalid callback type was supplied
mbed_official 15:a81a8d6c1dfe 119 * \retval STATUS_ERR_BAD_ADDRESS No matching entry was found in the
mbed_official 15:a81a8d6c1dfe 120 * registration table
mbed_official 15:a81a8d6c1dfe 121 */
mbed_official 15:a81a8d6c1dfe 122 enum status_code extint_unregister_callback(
mbed_official 15:a81a8d6c1dfe 123 const extint_callback_t callback,
mbed_official 15:a81a8d6c1dfe 124 const uint8_t channel,
mbed_official 15:a81a8d6c1dfe 125 const enum extint_callback_type type)
mbed_official 15:a81a8d6c1dfe 126 {
mbed_official 15:a81a8d6c1dfe 127 /* Sanity check arguments */
mbed_official 15:a81a8d6c1dfe 128 Assert(callback);
mbed_official 15:a81a8d6c1dfe 129
mbed_official 15:a81a8d6c1dfe 130 if (type != EXTINT_CALLBACK_TYPE_DETECT) {
mbed_official 15:a81a8d6c1dfe 131 Assert(false);
mbed_official 15:a81a8d6c1dfe 132 return STATUS_ERR_INVALID_ARG;
mbed_official 15:a81a8d6c1dfe 133 }
mbed_official 15:a81a8d6c1dfe 134
mbed_official 15:a81a8d6c1dfe 135 if (_extint_dev.callbacks[channel] == callback) {
mbed_official 15:a81a8d6c1dfe 136 _extint_dev.callbacks[channel] = NULL;
mbed_official 15:a81a8d6c1dfe 137 return STATUS_OK;
mbed_official 15:a81a8d6c1dfe 138 }
mbed_official 15:a81a8d6c1dfe 139
mbed_official 15:a81a8d6c1dfe 140 return STATUS_ERR_BAD_ADDRESS;
mbed_official 15:a81a8d6c1dfe 141 }
mbed_official 15:a81a8d6c1dfe 142
mbed_official 15:a81a8d6c1dfe 143 /**
mbed_official 15:a81a8d6c1dfe 144 * \brief Enables asynchronous callback generation for a given channel and type.
mbed_official 15:a81a8d6c1dfe 145 *
mbed_official 15:a81a8d6c1dfe 146 * Enables asynchronous callbacks for a given logical external interrupt channel
mbed_official 15:a81a8d6c1dfe 147 * and type. This must be called before an external interrupt channel will
mbed_official 15:a81a8d6c1dfe 148 * generate callback events.
mbed_official 15:a81a8d6c1dfe 149 *
mbed_official 15:a81a8d6c1dfe 150 * \param[in] channel Logical channel to enable callback generation for
mbed_official 15:a81a8d6c1dfe 151 * \param[in] type Type of callback function callbacks to enable
mbed_official 15:a81a8d6c1dfe 152 *
mbed_official 15:a81a8d6c1dfe 153 * \return Status of the callback enable operation.
mbed_official 15:a81a8d6c1dfe 154 * \retval STATUS_OK The callback was enabled successfully
mbed_official 15:a81a8d6c1dfe 155 * \retval STATUS_ERR_INVALID_ARG If an invalid callback type was supplied
mbed_official 15:a81a8d6c1dfe 156 */
mbed_official 15:a81a8d6c1dfe 157 enum status_code extint_chan_enable_callback(
mbed_official 15:a81a8d6c1dfe 158 const uint8_t channel,
mbed_official 15:a81a8d6c1dfe 159 const enum extint_callback_type type)
mbed_official 15:a81a8d6c1dfe 160 {
mbed_official 15:a81a8d6c1dfe 161 if (type == EXTINT_CALLBACK_TYPE_DETECT) {
mbed_official 15:a81a8d6c1dfe 162 Eic *const eic = _extint_get_eic_from_channel(channel);
mbed_official 15:a81a8d6c1dfe 163
mbed_official 15:a81a8d6c1dfe 164 eic->INTENSET.reg = (1UL << channel);
mbed_official 15:a81a8d6c1dfe 165 } else {
mbed_official 15:a81a8d6c1dfe 166 Assert(false);
mbed_official 15:a81a8d6c1dfe 167 return STATUS_ERR_INVALID_ARG;
mbed_official 15:a81a8d6c1dfe 168 }
mbed_official 15:a81a8d6c1dfe 169
mbed_official 15:a81a8d6c1dfe 170 return STATUS_OK;
mbed_official 15:a81a8d6c1dfe 171 }
mbed_official 15:a81a8d6c1dfe 172
mbed_official 15:a81a8d6c1dfe 173 /**
mbed_official 15:a81a8d6c1dfe 174 * \brief Disables asynchronous callback generation for a given channel and type.
mbed_official 15:a81a8d6c1dfe 175 *
mbed_official 15:a81a8d6c1dfe 176 * Disables asynchronous callbacks for a given logical external interrupt
mbed_official 15:a81a8d6c1dfe 177 * channel and type.
mbed_official 15:a81a8d6c1dfe 178 *
mbed_official 15:a81a8d6c1dfe 179 * \param[in] channel Logical channel to disable callback generation for
mbed_official 15:a81a8d6c1dfe 180 * \param[in] type Type of callback function callbacks to disable
mbed_official 15:a81a8d6c1dfe 181 *
mbed_official 15:a81a8d6c1dfe 182 * \return Status of the callback disable operation.
mbed_official 15:a81a8d6c1dfe 183 * \retval STATUS_OK The callback was disabled successfully
mbed_official 15:a81a8d6c1dfe 184 * \retval STATUS_ERR_INVALID_ARG If an invalid callback type was supplied
mbed_official 15:a81a8d6c1dfe 185 */
mbed_official 15:a81a8d6c1dfe 186 enum status_code extint_chan_disable_callback(
mbed_official 15:a81a8d6c1dfe 187 const uint8_t channel,
mbed_official 15:a81a8d6c1dfe 188 const enum extint_callback_type type)
mbed_official 15:a81a8d6c1dfe 189 {
mbed_official 15:a81a8d6c1dfe 190 if (type == EXTINT_CALLBACK_TYPE_DETECT) {
mbed_official 15:a81a8d6c1dfe 191 Eic *const eic = _extint_get_eic_from_channel(channel);
mbed_official 15:a81a8d6c1dfe 192
mbed_official 15:a81a8d6c1dfe 193 eic->INTENCLR.reg = (1UL << channel);
mbed_official 15:a81a8d6c1dfe 194 } else {
mbed_official 15:a81a8d6c1dfe 195 Assert(false);
mbed_official 15:a81a8d6c1dfe 196 return STATUS_ERR_INVALID_ARG;
mbed_official 15:a81a8d6c1dfe 197 }
mbed_official 15:a81a8d6c1dfe 198
mbed_official 15:a81a8d6c1dfe 199 return STATUS_OK;
mbed_official 15:a81a8d6c1dfe 200 }
mbed_official 15:a81a8d6c1dfe 201
mbed_official 15:a81a8d6c1dfe 202 /**
mbed_official 15:a81a8d6c1dfe 203 * \brief Find what channel caused the callback.
mbed_official 15:a81a8d6c1dfe 204 *
mbed_official 15:a81a8d6c1dfe 205 * Can be used in an EXTINT callback function to find what channel caused
mbed_official 15:a81a8d6c1dfe 206 * the callback in case same callback is used by multiple channels.
mbed_official 15:a81a8d6c1dfe 207 *
mbed_official 15:a81a8d6c1dfe 208 * \return Channel number.
mbed_official 15:a81a8d6c1dfe 209 */
mbed_official 15:a81a8d6c1dfe 210 uint8_t extint_get_current_channel(void)
mbed_official 15:a81a8d6c1dfe 211 {
mbed_official 15:a81a8d6c1dfe 212 return _current_channel;
mbed_official 15:a81a8d6c1dfe 213 }
mbed_official 15:a81a8d6c1dfe 214
mbed_official 15:a81a8d6c1dfe 215 /** Handler for the EXTINT hardware module interrupt. */
mbed_official 15:a81a8d6c1dfe 216 void EIC_Handler(void)
mbed_official 15:a81a8d6c1dfe 217 {
mbed_official 15:a81a8d6c1dfe 218 /* Find any triggered channels, run associated callback handlers */
mbed_official 15:a81a8d6c1dfe 219 for (_current_channel = 0; _current_channel < EIC_NUMBER_OF_INTERRUPTS ; _current_channel++) {
mbed_official 15:a81a8d6c1dfe 220 if (extint_chan_is_detected(_current_channel)) {
mbed_official 15:a81a8d6c1dfe 221 /* Clear flag */
mbed_official 15:a81a8d6c1dfe 222 extint_chan_clear_detected(_current_channel);
mbed_official 15:a81a8d6c1dfe 223 /* Find any associated callback entries in the callback table */
mbed_official 15:a81a8d6c1dfe 224 if (_extint_dev.callbacks[_current_channel] != NULL) {
mbed_official 15:a81a8d6c1dfe 225 /* Run the registered callback */
mbed_official 15:a81a8d6c1dfe 226 _extint_dev.callbacks[_current_channel]();
mbed_official 15:a81a8d6c1dfe 227 }
mbed_official 15:a81a8d6c1dfe 228 }
mbed_official 15:a81a8d6c1dfe 229 }
mbed_official 15:a81a8d6c1dfe 230 }