mbed library sources. Supersedes mbed-src.
Fork of mbed-dev by
targets/hal/TARGET_Atmel/TARGET_SAM_CortexM0P/drivers/extint/TARGET_SAML21/extint.c@18:da299f395b9e, 2015-11-09 (annotated)
- Committer:
- mbed_official
- Date:
- Mon Nov 09 13:30:11 2015 +0000
- Revision:
- 18:da299f395b9e
Synchronized with git revision f605825f66bb2e462ff7dbc5fb4ed2dbe979d1c3
Full URL: https://github.com/mbedmicro/mbed/commit/f605825f66bb2e462ff7dbc5fb4ed2dbe979d1c3/
Added support for SAML21
Who changed what in which revision?
User | Revision | Line number | New contents of line |
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mbed_official | 18:da299f395b9e | 1 | /** |
mbed_official | 18:da299f395b9e | 2 | * \file |
mbed_official | 18:da299f395b9e | 3 | * |
mbed_official | 18:da299f395b9e | 4 | * \brief SAM External Interrupt Driver |
mbed_official | 18:da299f395b9e | 5 | * |
mbed_official | 18:da299f395b9e | 6 | * Copyright (C) 2014-2015 Atmel Corporation. All rights reserved. |
mbed_official | 18:da299f395b9e | 7 | * |
mbed_official | 18:da299f395b9e | 8 | * \asf_license_start |
mbed_official | 18:da299f395b9e | 9 | * |
mbed_official | 18:da299f395b9e | 10 | * \page License |
mbed_official | 18:da299f395b9e | 11 | * |
mbed_official | 18:da299f395b9e | 12 | * Redistribution and use in source and binary forms, with or without |
mbed_official | 18:da299f395b9e | 13 | * modification, are permitted provided that the following conditions are met: |
mbed_official | 18:da299f395b9e | 14 | * |
mbed_official | 18:da299f395b9e | 15 | * 1. Redistributions of source code must retain the above copyright notice, |
mbed_official | 18:da299f395b9e | 16 | * this list of conditions and the following disclaimer. |
mbed_official | 18:da299f395b9e | 17 | * |
mbed_official | 18:da299f395b9e | 18 | * 2. Redistributions in binary form must reproduce the above copyright notice, |
mbed_official | 18:da299f395b9e | 19 | * this list of conditions and the following disclaimer in the documentation |
mbed_official | 18:da299f395b9e | 20 | * and/or other materials provided with the distribution. |
mbed_official | 18:da299f395b9e | 21 | * |
mbed_official | 18:da299f395b9e | 22 | * 3. The name of Atmel may not be used to endorse or promote products derived |
mbed_official | 18:da299f395b9e | 23 | * from this software without specific prior written permission. |
mbed_official | 18:da299f395b9e | 24 | * |
mbed_official | 18:da299f395b9e | 25 | * 4. This software may only be redistributed and used in connection with an |
mbed_official | 18:da299f395b9e | 26 | * Atmel microcontroller product. |
mbed_official | 18:da299f395b9e | 27 | * |
mbed_official | 18:da299f395b9e | 28 | * THIS SOFTWARE IS PROVIDED BY ATMEL "AS IS" AND ANY EXPRESS OR IMPLIED |
mbed_official | 18:da299f395b9e | 29 | * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF |
mbed_official | 18:da299f395b9e | 30 | * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT ARE |
mbed_official | 18:da299f395b9e | 31 | * EXPRESSLY AND SPECIFICALLY DISCLAIMED. IN NO EVENT SHALL ATMEL BE LIABLE FOR |
mbed_official | 18:da299f395b9e | 32 | * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
mbed_official | 18:da299f395b9e | 33 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
mbed_official | 18:da299f395b9e | 34 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
mbed_official | 18:da299f395b9e | 35 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, |
mbed_official | 18:da299f395b9e | 36 | * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN |
mbed_official | 18:da299f395b9e | 37 | * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
mbed_official | 18:da299f395b9e | 38 | * POSSIBILITY OF SUCH DAMAGE. |
mbed_official | 18:da299f395b9e | 39 | * |
mbed_official | 18:da299f395b9e | 40 | * \asf_license_stop |
mbed_official | 18:da299f395b9e | 41 | * |
mbed_official | 18:da299f395b9e | 42 | */ |
mbed_official | 18:da299f395b9e | 43 | /* |
mbed_official | 18:da299f395b9e | 44 | * Support and FAQ: visit <a href="http://www.atmel.com/design-support/">Atmel Support</a> |
mbed_official | 18:da299f395b9e | 45 | */ |
mbed_official | 18:da299f395b9e | 46 | #include <system.h> |
mbed_official | 18:da299f395b9e | 47 | #include <system_interrupt.h> |
mbed_official | 18:da299f395b9e | 48 | #include <extint.h> |
mbed_official | 18:da299f395b9e | 49 | #include <conf_extint.h> |
mbed_official | 18:da299f395b9e | 50 | |
mbed_official | 18:da299f395b9e | 51 | #if !defined(EXTINT_CLOCK_SELECTION) || defined(__DOXYGEN__) |
mbed_official | 18:da299f395b9e | 52 | # warning EXTINT_CLOCK_SELECTION is not defined, assuming EXTINT_CLK_GCLK. |
mbed_official | 18:da299f395b9e | 53 | |
mbed_official | 18:da299f395b9e | 54 | /** Configuration option, setting the EIC clock source which can be used for |
mbed_official | 18:da299f395b9e | 55 | * EIC edge detection or filtering. This option may be overridden in the module |
mbed_official | 18:da299f395b9e | 56 | * configuration header file \c conf_extint.h. |
mbed_official | 18:da299f395b9e | 57 | */ |
mbed_official | 18:da299f395b9e | 58 | # define EXTINT_CLOCK_SELECTION EXTINT_CLK_GCLK |
mbed_official | 18:da299f395b9e | 59 | #endif |
mbed_official | 18:da299f395b9e | 60 | |
mbed_official | 18:da299f395b9e | 61 | #if (EXTINT_CLOCK_SELECTION == EXTINT_CLK_GCLK) |
mbed_official | 18:da299f395b9e | 62 | #if !defined(EXTINT_CLOCK_SOURCE) || defined(__DOXYGEN__) |
mbed_official | 18:da299f395b9e | 63 | # warning EXTINT_CLOCK_SOURCE is not defined, assuming GCLK_GENERATOR_0. |
mbed_official | 18:da299f395b9e | 64 | |
mbed_official | 18:da299f395b9e | 65 | /** Configuration option, setting the EIC clock source which can be used for |
mbed_official | 18:da299f395b9e | 66 | * EIC edge detection or filtering. This option may be overridden in the module |
mbed_official | 18:da299f395b9e | 67 | * configuration header file \c conf_extint.h. |
mbed_official | 18:da299f395b9e | 68 | */ |
mbed_official | 18:da299f395b9e | 69 | # define EXTINT_CLOCK_SOURCE GCLK_GENERATOR_0 |
mbed_official | 18:da299f395b9e | 70 | #endif |
mbed_official | 18:da299f395b9e | 71 | #endif |
mbed_official | 18:da299f395b9e | 72 | |
mbed_official | 18:da299f395b9e | 73 | /** |
mbed_official | 18:da299f395b9e | 74 | * \internal |
mbed_official | 18:da299f395b9e | 75 | * Internal driver device instance struct. |
mbed_official | 18:da299f395b9e | 76 | */ |
mbed_official | 18:da299f395b9e | 77 | struct _extint_module _extint_dev; |
mbed_official | 18:da299f395b9e | 78 | |
mbed_official | 18:da299f395b9e | 79 | /** |
mbed_official | 18:da299f395b9e | 80 | * \brief Determin if the general clock is required. |
mbed_official | 18:da299f395b9e | 81 | * |
mbed_official | 18:da299f395b9e | 82 | * \param[in] filter_input_signal Filter the raw input signal to prevent noise |
mbed_official | 18:da299f395b9e | 83 | * \param[in] detection_criteria Edge detection mode to use (\ref extint_detect) |
mbed_official | 18:da299f395b9e | 84 | */ |
mbed_official | 18:da299f395b9e | 85 | #define _extint_is_gclk_required(filter_input_signal, detection_criteria) \ |
mbed_official | 18:da299f395b9e | 86 | ((filter_input_signal) ? true : (\ |
mbed_official | 18:da299f395b9e | 87 | (EXTINT_DETECT_RISING == (detection_criteria)) ? true : (\ |
mbed_official | 18:da299f395b9e | 88 | (EXTINT_DETECT_FALLING == (detection_criteria)) ? true : (\ |
mbed_official | 18:da299f395b9e | 89 | (EXTINT_DETECT_BOTH == (detection_criteria)) ? true : false)))) |
mbed_official | 18:da299f395b9e | 90 | |
mbed_official | 18:da299f395b9e | 91 | static void _extint_enable(void); |
mbed_official | 18:da299f395b9e | 92 | static void _extint_disable(void); |
mbed_official | 18:da299f395b9e | 93 | |
mbed_official | 18:da299f395b9e | 94 | /** |
mbed_official | 18:da299f395b9e | 95 | * \brief Determines if the hardware module(s) are currently synchronizing to the bus. |
mbed_official | 18:da299f395b9e | 96 | * |
mbed_official | 18:da299f395b9e | 97 | * Checks to see if the underlying hardware peripheral module(s) are currently |
mbed_official | 18:da299f395b9e | 98 | * synchronizing across multiple clock domains to the hardware bus, This |
mbed_official | 18:da299f395b9e | 99 | * function can be used to delay further operations on a module until such time |
mbed_official | 18:da299f395b9e | 100 | * that it is ready, to prevent blocking delays for synchronization in the |
mbed_official | 18:da299f395b9e | 101 | * user application. |
mbed_official | 18:da299f395b9e | 102 | * |
mbed_official | 18:da299f395b9e | 103 | * \return Synchronization status of the underlying hardware module(s). |
mbed_official | 18:da299f395b9e | 104 | * |
mbed_official | 18:da299f395b9e | 105 | * \retval true If the module synchronization is ongoing |
mbed_official | 18:da299f395b9e | 106 | * \retval false If the module has completed synchronization |
mbed_official | 18:da299f395b9e | 107 | */ |
mbed_official | 18:da299f395b9e | 108 | static inline bool extint_is_syncing(void) |
mbed_official | 18:da299f395b9e | 109 | { |
mbed_official | 18:da299f395b9e | 110 | Eic *const eics[EIC_INST_NUM] = EIC_INSTS; |
mbed_official | 18:da299f395b9e | 111 | |
mbed_official | 18:da299f395b9e | 112 | for (uint32_t i = 0; i < EIC_INST_NUM; i++) { |
mbed_official | 18:da299f395b9e | 113 | if((eics[i]->SYNCBUSY.reg & EIC_SYNCBUSY_ENABLE) |
mbed_official | 18:da299f395b9e | 114 | || (eics[i]->SYNCBUSY.reg & EIC_SYNCBUSY_SWRST)) { |
mbed_official | 18:da299f395b9e | 115 | return true; |
mbed_official | 18:da299f395b9e | 116 | } |
mbed_official | 18:da299f395b9e | 117 | } |
mbed_official | 18:da299f395b9e | 118 | return false; |
mbed_official | 18:da299f395b9e | 119 | } |
mbed_official | 18:da299f395b9e | 120 | |
mbed_official | 18:da299f395b9e | 121 | /** |
mbed_official | 18:da299f395b9e | 122 | * \internal |
mbed_official | 18:da299f395b9e | 123 | * \brief Initializes and enables the External Interrupt driver. |
mbed_official | 18:da299f395b9e | 124 | * |
mbed_official | 18:da299f395b9e | 125 | * Enable the clocks used by External Interrupt driver. |
mbed_official | 18:da299f395b9e | 126 | * |
mbed_official | 18:da299f395b9e | 127 | * Resets the External Interrupt driver, resetting all hardware |
mbed_official | 18:da299f395b9e | 128 | * module registers to their power-on defaults, then enable it for further use. |
mbed_official | 18:da299f395b9e | 129 | * |
mbed_official | 18:da299f395b9e | 130 | * Reset the callback list if callback mode is used. |
mbed_official | 18:da299f395b9e | 131 | * |
mbed_official | 18:da299f395b9e | 132 | * This function must be called before attempting to use any NMI or standard |
mbed_official | 18:da299f395b9e | 133 | * external interrupt channel functions. |
mbed_official | 18:da299f395b9e | 134 | * |
mbed_official | 18:da299f395b9e | 135 | * \note When SYSTEM module is used, this function will be invoked by |
mbed_official | 18:da299f395b9e | 136 | * \ref system_init() automatically if the module is included. |
mbed_official | 18:da299f395b9e | 137 | */ |
mbed_official | 18:da299f395b9e | 138 | void _system_extint_init(void); |
mbed_official | 18:da299f395b9e | 139 | void _system_extint_init(void) |
mbed_official | 18:da299f395b9e | 140 | { |
mbed_official | 18:da299f395b9e | 141 | Eic *const eics[EIC_INST_NUM] = EIC_INSTS; |
mbed_official | 18:da299f395b9e | 142 | |
mbed_official | 18:da299f395b9e | 143 | /* Turn on the digital interface clock */ |
mbed_official | 18:da299f395b9e | 144 | system_apb_clock_set_mask(SYSTEM_CLOCK_APB_APBA, MCLK_APBAMASK_EIC); |
mbed_official | 18:da299f395b9e | 145 | |
mbed_official | 18:da299f395b9e | 146 | #if (EXTINT_CLOCK_SELECTION == EXTINT_CLK_GCLK) |
mbed_official | 18:da299f395b9e | 147 | /* Configure the generic clock for the module and enable it */ |
mbed_official | 18:da299f395b9e | 148 | struct system_gclk_chan_config gclk_chan_conf; |
mbed_official | 18:da299f395b9e | 149 | system_gclk_chan_get_config_defaults(&gclk_chan_conf); |
mbed_official | 18:da299f395b9e | 150 | gclk_chan_conf.source_generator = EXTINT_CLOCK_SOURCE; |
mbed_official | 18:da299f395b9e | 151 | system_gclk_chan_set_config(EIC_GCLK_ID, &gclk_chan_conf); |
mbed_official | 18:da299f395b9e | 152 | |
mbed_official | 18:da299f395b9e | 153 | /* Enable the clock anyway, since when needed it will be requested |
mbed_official | 18:da299f395b9e | 154 | * by External Interrupt driver */ |
mbed_official | 18:da299f395b9e | 155 | system_gclk_chan_enable(EIC_GCLK_ID); |
mbed_official | 18:da299f395b9e | 156 | #endif |
mbed_official | 18:da299f395b9e | 157 | |
mbed_official | 18:da299f395b9e | 158 | /* Reset all EIC hardware modules. */ |
mbed_official | 18:da299f395b9e | 159 | for (uint32_t i = 0; i < EIC_INST_NUM; i++) { |
mbed_official | 18:da299f395b9e | 160 | eics[i]->CTRLA.reg |= EIC_CTRLA_SWRST; |
mbed_official | 18:da299f395b9e | 161 | } |
mbed_official | 18:da299f395b9e | 162 | |
mbed_official | 18:da299f395b9e | 163 | while (extint_is_syncing()) { |
mbed_official | 18:da299f395b9e | 164 | /* Wait for all hardware modules to complete synchronization */ |
mbed_official | 18:da299f395b9e | 165 | } |
mbed_official | 18:da299f395b9e | 166 | |
mbed_official | 18:da299f395b9e | 167 | #if (EXTINT_CLOCK_SELECTION == EXTINT_CLK_GCLK) |
mbed_official | 18:da299f395b9e | 168 | for (uint32_t i = 0; i < EIC_INST_NUM; i++) { |
mbed_official | 18:da299f395b9e | 169 | eics[i]->CTRLA.bit.CKSEL = EXTINT_CLK_GCLK; |
mbed_official | 18:da299f395b9e | 170 | } |
mbed_official | 18:da299f395b9e | 171 | #else |
mbed_official | 18:da299f395b9e | 172 | for (uint32_t i = 0; i < EIC_INST_NUM; i++) { |
mbed_official | 18:da299f395b9e | 173 | eics[i]->CTRLA.bit.CKSEL = EXTINT_CLK_ULP32K; |
mbed_official | 18:da299f395b9e | 174 | } |
mbed_official | 18:da299f395b9e | 175 | #endif |
mbed_official | 18:da299f395b9e | 176 | |
mbed_official | 18:da299f395b9e | 177 | /* Reset the software module */ |
mbed_official | 18:da299f395b9e | 178 | #if EXTINT_CALLBACK_MODE == true |
mbed_official | 18:da299f395b9e | 179 | /* Clear callback registration table */ |
mbed_official | 18:da299f395b9e | 180 | for (uint8_t j = 0; j < EIC_NUMBER_OF_INTERRUPTS; j++) { |
mbed_official | 18:da299f395b9e | 181 | _extint_dev.callbacks[j] = NULL; |
mbed_official | 18:da299f395b9e | 182 | } |
mbed_official | 18:da299f395b9e | 183 | system_interrupt_enable(SYSTEM_INTERRUPT_MODULE_EIC); |
mbed_official | 18:da299f395b9e | 184 | #endif |
mbed_official | 18:da299f395b9e | 185 | |
mbed_official | 18:da299f395b9e | 186 | /* Enables the driver for further use */ |
mbed_official | 18:da299f395b9e | 187 | _extint_enable(); |
mbed_official | 18:da299f395b9e | 188 | } |
mbed_official | 18:da299f395b9e | 189 | |
mbed_official | 18:da299f395b9e | 190 | /** |
mbed_official | 18:da299f395b9e | 191 | * \internal |
mbed_official | 18:da299f395b9e | 192 | * \brief Enables the External Interrupt driver. |
mbed_official | 18:da299f395b9e | 193 | * |
mbed_official | 18:da299f395b9e | 194 | * Enables EIC modules. |
mbed_official | 18:da299f395b9e | 195 | * Registered callback list will not be affected if callback mode is used. |
mbed_official | 18:da299f395b9e | 196 | */ |
mbed_official | 18:da299f395b9e | 197 | void _extint_enable(void) |
mbed_official | 18:da299f395b9e | 198 | { |
mbed_official | 18:da299f395b9e | 199 | Eic *const eics[EIC_INST_NUM] = EIC_INSTS; |
mbed_official | 18:da299f395b9e | 200 | |
mbed_official | 18:da299f395b9e | 201 | /* Enable all EIC hardware modules. */ |
mbed_official | 18:da299f395b9e | 202 | for (uint32_t i = 0; i < EIC_INST_NUM; i++) { |
mbed_official | 18:da299f395b9e | 203 | eics[i]->CTRLA.reg |= EIC_CTRLA_ENABLE; |
mbed_official | 18:da299f395b9e | 204 | } |
mbed_official | 18:da299f395b9e | 205 | |
mbed_official | 18:da299f395b9e | 206 | while (extint_is_syncing()) { |
mbed_official | 18:da299f395b9e | 207 | /* Wait for all hardware modules to complete synchronization */ |
mbed_official | 18:da299f395b9e | 208 | } |
mbed_official | 18:da299f395b9e | 209 | } |
mbed_official | 18:da299f395b9e | 210 | |
mbed_official | 18:da299f395b9e | 211 | /** |
mbed_official | 18:da299f395b9e | 212 | * \internal |
mbed_official | 18:da299f395b9e | 213 | * \brief Disables the External Interrupt driver. |
mbed_official | 18:da299f395b9e | 214 | * |
mbed_official | 18:da299f395b9e | 215 | * Disables EIC modules that were previously started via a call to |
mbed_official | 18:da299f395b9e | 216 | * \ref _extint_enable(). |
mbed_official | 18:da299f395b9e | 217 | * Registered callback list will not be affected if callback mode is used. |
mbed_official | 18:da299f395b9e | 218 | */ |
mbed_official | 18:da299f395b9e | 219 | void _extint_disable(void) |
mbed_official | 18:da299f395b9e | 220 | { |
mbed_official | 18:da299f395b9e | 221 | Eic *const eics[EIC_INST_NUM] = EIC_INSTS; |
mbed_official | 18:da299f395b9e | 222 | |
mbed_official | 18:da299f395b9e | 223 | /* Disable all EIC hardware modules. */ |
mbed_official | 18:da299f395b9e | 224 | for (uint32_t i = 0; i < EIC_INST_NUM; i++) { |
mbed_official | 18:da299f395b9e | 225 | eics[i]->CTRLA.reg &= ~EIC_CTRLA_ENABLE; |
mbed_official | 18:da299f395b9e | 226 | } |
mbed_official | 18:da299f395b9e | 227 | |
mbed_official | 18:da299f395b9e | 228 | while (extint_is_syncing()) { |
mbed_official | 18:da299f395b9e | 229 | /* Wait for all hardware modules to complete synchronization */ |
mbed_official | 18:da299f395b9e | 230 | } |
mbed_official | 18:da299f395b9e | 231 | } |
mbed_official | 18:da299f395b9e | 232 | |
mbed_official | 18:da299f395b9e | 233 | /** |
mbed_official | 18:da299f395b9e | 234 | * \brief Initializes an External Interrupt channel configuration structure to defaults. |
mbed_official | 18:da299f395b9e | 235 | * |
mbed_official | 18:da299f395b9e | 236 | * Initializes a given External Interrupt channel configuration structure to a |
mbed_official | 18:da299f395b9e | 237 | * set of known default values. This function should be called on all new |
mbed_official | 18:da299f395b9e | 238 | * instances of these configuration structures before being modified by the |
mbed_official | 18:da299f395b9e | 239 | * user application. |
mbed_official | 18:da299f395b9e | 240 | * |
mbed_official | 18:da299f395b9e | 241 | * The default configuration is as follows: |
mbed_official | 18:da299f395b9e | 242 | * \li Input filtering disabled |
mbed_official | 18:da299f395b9e | 243 | * \li Internal pull-up enabled |
mbed_official | 18:da299f395b9e | 244 | * \li Detect falling edges of a signal |
mbed_official | 18:da299f395b9e | 245 | * \li Asynchronous edge detection is disabled |
mbed_official | 18:da299f395b9e | 246 | * |
mbed_official | 18:da299f395b9e | 247 | * \param[out] config Configuration structure to initialize to default values |
mbed_official | 18:da299f395b9e | 248 | */ |
mbed_official | 18:da299f395b9e | 249 | void extint_chan_get_config_defaults( |
mbed_official | 18:da299f395b9e | 250 | struct extint_chan_conf *const config) |
mbed_official | 18:da299f395b9e | 251 | { |
mbed_official | 18:da299f395b9e | 252 | /* Sanity check arguments */ |
mbed_official | 18:da299f395b9e | 253 | Assert(config); |
mbed_official | 18:da299f395b9e | 254 | |
mbed_official | 18:da299f395b9e | 255 | /* Default configuration values */ |
mbed_official | 18:da299f395b9e | 256 | config->gpio_pin = 0; |
mbed_official | 18:da299f395b9e | 257 | config->gpio_pin_mux = 0; |
mbed_official | 18:da299f395b9e | 258 | config->gpio_pin_pull = EXTINT_PULL_UP; |
mbed_official | 18:da299f395b9e | 259 | config->filter_input_signal = false; |
mbed_official | 18:da299f395b9e | 260 | config->detection_criteria = EXTINT_DETECT_FALLING; |
mbed_official | 18:da299f395b9e | 261 | config->enable_async_edge_detection = false; |
mbed_official | 18:da299f395b9e | 262 | } |
mbed_official | 18:da299f395b9e | 263 | |
mbed_official | 18:da299f395b9e | 264 | /** |
mbed_official | 18:da299f395b9e | 265 | * \brief Writes an External Interrupt channel configuration to the hardware module. |
mbed_official | 18:da299f395b9e | 266 | * |
mbed_official | 18:da299f395b9e | 267 | * Writes out a given configuration of an External Interrupt channel |
mbed_official | 18:da299f395b9e | 268 | * configuration to the hardware module. If the channel is already configured, |
mbed_official | 18:da299f395b9e | 269 | * the new configuration will replace the existing one. |
mbed_official | 18:da299f395b9e | 270 | * |
mbed_official | 18:da299f395b9e | 271 | * \param[in] channel External Interrupt channel to configure |
mbed_official | 18:da299f395b9e | 272 | * \param[in] config Configuration settings for the channel |
mbed_official | 18:da299f395b9e | 273 | |
mbed_official | 18:da299f395b9e | 274 | */ |
mbed_official | 18:da299f395b9e | 275 | void extint_chan_set_config( |
mbed_official | 18:da299f395b9e | 276 | const uint8_t channel, |
mbed_official | 18:da299f395b9e | 277 | const struct extint_chan_conf *const config) |
mbed_official | 18:da299f395b9e | 278 | { |
mbed_official | 18:da299f395b9e | 279 | /* Sanity check arguments */ |
mbed_official | 18:da299f395b9e | 280 | Assert(config); |
mbed_official | 18:da299f395b9e | 281 | _extint_disable(); |
mbed_official | 18:da299f395b9e | 282 | #if(EXTINT_CLOCK_SELECTION == EXTINT_CLK_GCLK) |
mbed_official | 18:da299f395b9e | 283 | /* Sanity check clock requirements */ |
mbed_official | 18:da299f395b9e | 284 | Assert(!(!system_gclk_gen_is_enabled(EXTINT_CLOCK_SOURCE) && |
mbed_official | 18:da299f395b9e | 285 | _extint_is_gclk_required(config->filter_input_signal, |
mbed_official | 18:da299f395b9e | 286 | config->detection_criteria))); |
mbed_official | 18:da299f395b9e | 287 | #endif |
mbed_official | 18:da299f395b9e | 288 | struct system_pinmux_config pinmux_config; |
mbed_official | 18:da299f395b9e | 289 | system_pinmux_get_config_defaults(&pinmux_config); |
mbed_official | 18:da299f395b9e | 290 | |
mbed_official | 18:da299f395b9e | 291 | pinmux_config.mux_position = config->gpio_pin_mux; |
mbed_official | 18:da299f395b9e | 292 | pinmux_config.direction = SYSTEM_PINMUX_PIN_DIR_INPUT; |
mbed_official | 18:da299f395b9e | 293 | pinmux_config.input_pull = (enum system_pinmux_pin_pull)config->gpio_pin_pull; |
mbed_official | 18:da299f395b9e | 294 | system_pinmux_pin_set_config(config->gpio_pin, &pinmux_config); |
mbed_official | 18:da299f395b9e | 295 | |
mbed_official | 18:da299f395b9e | 296 | /* Get a pointer to the module hardware instance */ |
mbed_official | 18:da299f395b9e | 297 | Eic *const EIC_module = _extint_get_eic_from_channel(channel); |
mbed_official | 18:da299f395b9e | 298 | |
mbed_official | 18:da299f395b9e | 299 | uint32_t config_pos = (4 * (channel % 8)); |
mbed_official | 18:da299f395b9e | 300 | uint32_t new_config; |
mbed_official | 18:da299f395b9e | 301 | |
mbed_official | 18:da299f395b9e | 302 | /* Determine the channel's new edge detection configuration */ |
mbed_official | 18:da299f395b9e | 303 | new_config = (config->detection_criteria << EIC_CONFIG_SENSE0_Pos); |
mbed_official | 18:da299f395b9e | 304 | |
mbed_official | 18:da299f395b9e | 305 | /* Enable the hardware signal filter if requested in the config */ |
mbed_official | 18:da299f395b9e | 306 | if (config->filter_input_signal) { |
mbed_official | 18:da299f395b9e | 307 | new_config |= EIC_CONFIG_FILTEN0; |
mbed_official | 18:da299f395b9e | 308 | } |
mbed_official | 18:da299f395b9e | 309 | |
mbed_official | 18:da299f395b9e | 310 | /* Clear the existing and set the new channel configuration */ |
mbed_official | 18:da299f395b9e | 311 | EIC_module->CONFIG[channel / 8].reg |
mbed_official | 18:da299f395b9e | 312 | = (EIC_module->CONFIG[channel / 8].reg & |
mbed_official | 18:da299f395b9e | 313 | ~((EIC_CONFIG_SENSE0_Msk | EIC_CONFIG_FILTEN0) << config_pos)) | |
mbed_official | 18:da299f395b9e | 314 | (new_config << config_pos); |
mbed_official | 18:da299f395b9e | 315 | |
mbed_official | 18:da299f395b9e | 316 | /* Config asynchronous edge detection */ |
mbed_official | 18:da299f395b9e | 317 | if (config->enable_async_edge_detection) { |
mbed_official | 18:da299f395b9e | 318 | EIC_module->EIC_ASYNCH.reg |= (1UL << channel); |
mbed_official | 18:da299f395b9e | 319 | } else { |
mbed_official | 18:da299f395b9e | 320 | EIC_module->EIC_ASYNCH.reg &= (EIC_EIC_ASYNCH_MASK & (~(1UL << channel))); |
mbed_official | 18:da299f395b9e | 321 | } |
mbed_official | 18:da299f395b9e | 322 | |
mbed_official | 18:da299f395b9e | 323 | _extint_enable(); |
mbed_official | 18:da299f395b9e | 324 | } |
mbed_official | 18:da299f395b9e | 325 | |
mbed_official | 18:da299f395b9e | 326 | /** |
mbed_official | 18:da299f395b9e | 327 | * \brief Writes an External Interrupt NMI channel configuration to the hardware module. |
mbed_official | 18:da299f395b9e | 328 | * |
mbed_official | 18:da299f395b9e | 329 | * Writes out a given configuration of an External Interrupt NMI channel |
mbed_official | 18:da299f395b9e | 330 | * configuration to the hardware module. If the channel is already configured, |
mbed_official | 18:da299f395b9e | 331 | * the new configuration will replace the existing one. |
mbed_official | 18:da299f395b9e | 332 | * |
mbed_official | 18:da299f395b9e | 333 | * \param[in] nmi_channel External Interrupt NMI channel to configure |
mbed_official | 18:da299f395b9e | 334 | * \param[in] config Configuration settings for the channel |
mbed_official | 18:da299f395b9e | 335 | * |
mbed_official | 18:da299f395b9e | 336 | * \returns Status code indicating the success or failure of the request. |
mbed_official | 18:da299f395b9e | 337 | * \retval STATUS_OK Configuration succeeded |
mbed_official | 18:da299f395b9e | 338 | * \retval STATUS_ERR_PIN_MUX_INVALID An invalid pin mux value was supplied |
mbed_official | 18:da299f395b9e | 339 | * \retval STATUS_ERR_BAD_FORMAT An invalid detection mode was requested |
mbed_official | 18:da299f395b9e | 340 | */ |
mbed_official | 18:da299f395b9e | 341 | enum status_code extint_nmi_set_config( |
mbed_official | 18:da299f395b9e | 342 | const uint8_t nmi_channel, |
mbed_official | 18:da299f395b9e | 343 | const struct extint_nmi_conf *const config) |
mbed_official | 18:da299f395b9e | 344 | { |
mbed_official | 18:da299f395b9e | 345 | /* Sanity check arguments */ |
mbed_official | 18:da299f395b9e | 346 | Assert(config); |
mbed_official | 18:da299f395b9e | 347 | |
mbed_official | 18:da299f395b9e | 348 | /* Sanity check clock requirements */ |
mbed_official | 18:da299f395b9e | 349 | Assert(!(!system_gclk_gen_is_enabled(EXTINT_CLOCK_SOURCE) && |
mbed_official | 18:da299f395b9e | 350 | _extint_is_gclk_required(config->filter_input_signal, |
mbed_official | 18:da299f395b9e | 351 | config->detection_criteria))); |
mbed_official | 18:da299f395b9e | 352 | |
mbed_official | 18:da299f395b9e | 353 | struct system_pinmux_config pinmux_config; |
mbed_official | 18:da299f395b9e | 354 | system_pinmux_get_config_defaults(&pinmux_config); |
mbed_official | 18:da299f395b9e | 355 | |
mbed_official | 18:da299f395b9e | 356 | pinmux_config.mux_position = config->gpio_pin_mux; |
mbed_official | 18:da299f395b9e | 357 | pinmux_config.direction = SYSTEM_PINMUX_PIN_DIR_INPUT; |
mbed_official | 18:da299f395b9e | 358 | pinmux_config.input_pull = SYSTEM_PINMUX_PIN_PULL_UP; |
mbed_official | 18:da299f395b9e | 359 | pinmux_config.input_pull = (enum system_pinmux_pin_pull)config->gpio_pin_pull; |
mbed_official | 18:da299f395b9e | 360 | system_pinmux_pin_set_config(config->gpio_pin, &pinmux_config); |
mbed_official | 18:da299f395b9e | 361 | |
mbed_official | 18:da299f395b9e | 362 | /* Get a pointer to the module hardware instance */ |
mbed_official | 18:da299f395b9e | 363 | Eic *const EIC_module = _extint_get_eic_from_channel(nmi_channel); |
mbed_official | 18:da299f395b9e | 364 | |
mbed_official | 18:da299f395b9e | 365 | uint32_t new_config; |
mbed_official | 18:da299f395b9e | 366 | |
mbed_official | 18:da299f395b9e | 367 | /* Determine the NMI's new edge detection configuration */ |
mbed_official | 18:da299f395b9e | 368 | new_config = (config->detection_criteria << EIC_NMICTRL_NMISENSE_Pos); |
mbed_official | 18:da299f395b9e | 369 | |
mbed_official | 18:da299f395b9e | 370 | /* Enable the hardware signal filter if requested in the config */ |
mbed_official | 18:da299f395b9e | 371 | if (config->filter_input_signal) { |
mbed_official | 18:da299f395b9e | 372 | new_config |= EIC_NMICTRL_NMIFILTEN; |
mbed_official | 18:da299f395b9e | 373 | } |
mbed_official | 18:da299f395b9e | 374 | |
mbed_official | 18:da299f395b9e | 375 | /* Enable asynchronous edge detection if requested in the config */ |
mbed_official | 18:da299f395b9e | 376 | if (config->enable_async_edge_detection) { |
mbed_official | 18:da299f395b9e | 377 | new_config |= EIC_NMICTRL_NMIASYNCH; |
mbed_official | 18:da299f395b9e | 378 | } |
mbed_official | 18:da299f395b9e | 379 | |
mbed_official | 18:da299f395b9e | 380 | /* Disable EIC and general clock to configure NMI */ |
mbed_official | 18:da299f395b9e | 381 | _extint_disable(); |
mbed_official | 18:da299f395b9e | 382 | #if(EXTINT_CLOCK_SELECTION == EXTINT_CLK_GCLK) |
mbed_official | 18:da299f395b9e | 383 | system_gclk_chan_disable(EIC_GCLK_ID); |
mbed_official | 18:da299f395b9e | 384 | #else |
mbed_official | 18:da299f395b9e | 385 | Eic *const eics[EIC_INST_NUM] = EIC_INSTS; |
mbed_official | 18:da299f395b9e | 386 | for (uint32_t i = 0; i < EIC_INST_NUM; i++) { |
mbed_official | 18:da299f395b9e | 387 | eics[i]->CTRLA.bit.CKSEL = EXTINT_CLK_GCLK; |
mbed_official | 18:da299f395b9e | 388 | system_gclk_chan_disable(EIC_GCLK_ID); |
mbed_official | 18:da299f395b9e | 389 | } |
mbed_official | 18:da299f395b9e | 390 | #endif |
mbed_official | 18:da299f395b9e | 391 | |
mbed_official | 18:da299f395b9e | 392 | EIC_module->NMICTRL.reg = new_config; |
mbed_official | 18:da299f395b9e | 393 | |
mbed_official | 18:da299f395b9e | 394 | /* Enable the EIC clock and EIC after configure NMI */ |
mbed_official | 18:da299f395b9e | 395 | #if(EXTINT_CLOCK_SELECTION == EXTINT_CLK_GCLK) |
mbed_official | 18:da299f395b9e | 396 | system_gclk_chan_enable(EIC_GCLK_ID); |
mbed_official | 18:da299f395b9e | 397 | #else |
mbed_official | 18:da299f395b9e | 398 | for (uint32_t i = 0; i < EIC_INST_NUM; i++) { |
mbed_official | 18:da299f395b9e | 399 | eics[i]->CTRLA.bit.CKSEL = EXTINT_CLK_ULP32K; |
mbed_official | 18:da299f395b9e | 400 | } |
mbed_official | 18:da299f395b9e | 401 | #endif |
mbed_official | 18:da299f395b9e | 402 | _extint_enable(); |
mbed_official | 18:da299f395b9e | 403 | |
mbed_official | 18:da299f395b9e | 404 | return STATUS_OK; |
mbed_official | 18:da299f395b9e | 405 | } |
mbed_official | 18:da299f395b9e | 406 | |
mbed_official | 18:da299f395b9e | 407 | /** |
mbed_official | 18:da299f395b9e | 408 | * \brief Enables an External Interrupt event output. |
mbed_official | 18:da299f395b9e | 409 | * |
mbed_official | 18:da299f395b9e | 410 | * Enables one or more output events from the External Interrupt module. See |
mbed_official | 18:da299f395b9e | 411 | * \ref extint_events "here" for a list of events this module supports. |
mbed_official | 18:da299f395b9e | 412 | * |
mbed_official | 18:da299f395b9e | 413 | * \note Events cannot be altered while the module is enabled. |
mbed_official | 18:da299f395b9e | 414 | * |
mbed_official | 18:da299f395b9e | 415 | * \param[in] events Struct containing flags of events to enable |
mbed_official | 18:da299f395b9e | 416 | */ |
mbed_official | 18:da299f395b9e | 417 | void extint_enable_events( |
mbed_official | 18:da299f395b9e | 418 | struct extint_events *const events) |
mbed_official | 18:da299f395b9e | 419 | { |
mbed_official | 18:da299f395b9e | 420 | /* Sanity check arguments */ |
mbed_official | 18:da299f395b9e | 421 | Assert(events); |
mbed_official | 18:da299f395b9e | 422 | |
mbed_official | 18:da299f395b9e | 423 | /* Array of available EICs. */ |
mbed_official | 18:da299f395b9e | 424 | Eic *const eics[EIC_INST_NUM] = EIC_INSTS; |
mbed_official | 18:da299f395b9e | 425 | |
mbed_official | 18:da299f395b9e | 426 | _extint_disable(); |
mbed_official | 18:da299f395b9e | 427 | |
mbed_official | 18:da299f395b9e | 428 | /* Update the event control register for each physical EIC instance */ |
mbed_official | 18:da299f395b9e | 429 | for (uint32_t i = 0; i < EIC_INST_NUM; i++) { |
mbed_official | 18:da299f395b9e | 430 | uint32_t event_mask = 0; |
mbed_official | 18:da299f395b9e | 431 | |
mbed_official | 18:da299f395b9e | 432 | /* Create an enable mask for the current EIC module */ |
mbed_official | 18:da299f395b9e | 433 | for (uint32_t j = 0; j < 32; j++) { |
mbed_official | 18:da299f395b9e | 434 | if (events->generate_event_on_detect[(32 * i) + j]) { |
mbed_official | 18:da299f395b9e | 435 | event_mask |= (1UL << j); |
mbed_official | 18:da299f395b9e | 436 | } |
mbed_official | 18:da299f395b9e | 437 | } |
mbed_official | 18:da299f395b9e | 438 | |
mbed_official | 18:da299f395b9e | 439 | /* Enable the masked events */ |
mbed_official | 18:da299f395b9e | 440 | eics[i]->EVCTRL.reg |= event_mask; |
mbed_official | 18:da299f395b9e | 441 | } |
mbed_official | 18:da299f395b9e | 442 | _extint_enable(); |
mbed_official | 18:da299f395b9e | 443 | } |
mbed_official | 18:da299f395b9e | 444 | |
mbed_official | 18:da299f395b9e | 445 | /** |
mbed_official | 18:da299f395b9e | 446 | * \brief Disables an External Interrupt event output. |
mbed_official | 18:da299f395b9e | 447 | * |
mbed_official | 18:da299f395b9e | 448 | * Disables one or more output events from the External Interrupt module. See |
mbed_official | 18:da299f395b9e | 449 | * \ref extint_events "here" for a list of events this module supports. |
mbed_official | 18:da299f395b9e | 450 | * |
mbed_official | 18:da299f395b9e | 451 | * \note Events cannot be altered while the module is enabled. |
mbed_official | 18:da299f395b9e | 452 | * |
mbed_official | 18:da299f395b9e | 453 | * \param[in] events Struct containing flags of events to disable |
mbed_official | 18:da299f395b9e | 454 | */ |
mbed_official | 18:da299f395b9e | 455 | void extint_disable_events( |
mbed_official | 18:da299f395b9e | 456 | struct extint_events *const events) |
mbed_official | 18:da299f395b9e | 457 | { |
mbed_official | 18:da299f395b9e | 458 | /* Sanity check arguments */ |
mbed_official | 18:da299f395b9e | 459 | Assert(events); |
mbed_official | 18:da299f395b9e | 460 | |
mbed_official | 18:da299f395b9e | 461 | /* Array of available EICs. */ |
mbed_official | 18:da299f395b9e | 462 | Eic *const eics[EIC_INST_NUM] = EIC_INSTS; |
mbed_official | 18:da299f395b9e | 463 | |
mbed_official | 18:da299f395b9e | 464 | _extint_disable(); |
mbed_official | 18:da299f395b9e | 465 | |
mbed_official | 18:da299f395b9e | 466 | /* Update the event control register for each physical EIC instance */ |
mbed_official | 18:da299f395b9e | 467 | for (uint32_t i = 0; i < EIC_INST_NUM; i++) { |
mbed_official | 18:da299f395b9e | 468 | uint32_t event_mask = 0; |
mbed_official | 18:da299f395b9e | 469 | |
mbed_official | 18:da299f395b9e | 470 | /* Create a disable mask for the current EIC module */ |
mbed_official | 18:da299f395b9e | 471 | for (uint32_t j = 0; j < 32; j++) { |
mbed_official | 18:da299f395b9e | 472 | if (events->generate_event_on_detect[(32 * i) + j]) { |
mbed_official | 18:da299f395b9e | 473 | event_mask |= (1UL << j); |
mbed_official | 18:da299f395b9e | 474 | } |
mbed_official | 18:da299f395b9e | 475 | } |
mbed_official | 18:da299f395b9e | 476 | |
mbed_official | 18:da299f395b9e | 477 | /* Disable the masked events */ |
mbed_official | 18:da299f395b9e | 478 | eics[i]->EVCTRL.reg &= ~event_mask; |
mbed_official | 18:da299f395b9e | 479 | } |
mbed_official | 18:da299f395b9e | 480 | _extint_enable(); |
mbed_official | 18:da299f395b9e | 481 | } |