Amit Gandhi / sensen_copy_2

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targets/TARGET_Atmel/TARGET_SAM_CortexM4/drivers/pio/pio_handler.c@149:156823d33999, 2016-10-28 (annotated)

Committer:
<>
Date:
Fri Oct 28 11:17:30 2016 +0100
Revision:
149:156823d33999
Parent:
targets/hal/TARGET_Atmel/TARGET_SAM_CortexM4/drivers/pio/pio_handler.c@107:414e9c822e99 
This updates the lib to the mbed lib v128



NOTE: This release includes a restructuring of the file and directory locations and thus some

include paths in your code may need updating accordingly.

Who changed what in which revision?

UserRevisionLine numberNew contents of line
mbed_official 107:414e9c822e99 1 /**
mbed_official 107:414e9c822e99 2 * \file
mbed_official 107:414e9c822e99 3 *
mbed_official 107:414e9c822e99 4 * \brief Parallel Input/Output (PIO) interrupt handler for SAM.
mbed_official 107:414e9c822e99 5 *
mbed_official 107:414e9c822e99 6 * Copyright (c) 2011-2015 Atmel Corporation. All rights reserved.
mbed_official 107:414e9c822e99 7 *
mbed_official 107:414e9c822e99 8 * \asf_license_start
mbed_official 107:414e9c822e99 9 *
mbed_official 107:414e9c822e99 10 * \page License
mbed_official 107:414e9c822e99 11 *
mbed_official 107:414e9c822e99 12 * Redistribution and use in source and binary forms, with or without
mbed_official 107:414e9c822e99 13 * modification, are permitted provided that the following conditions are met:
mbed_official 107:414e9c822e99 14 *
mbed_official 107:414e9c822e99 15 * 1. Redistributions of source code must retain the above copyright notice,
mbed_official 107:414e9c822e99 16 * this list of conditions and the following disclaimer.
mbed_official 107:414e9c822e99 17 *
mbed_official 107:414e9c822e99 18 * 2. Redistributions in binary form must reproduce the above copyright notice,
mbed_official 107:414e9c822e99 19 * this list of conditions and the following disclaimer in the documentation
mbed_official 107:414e9c822e99 20 * and/or other materials provided with the distribution.
mbed_official 107:414e9c822e99 21 *
mbed_official 107:414e9c822e99 22 * 3. The name of Atmel may not be used to endorse or promote products derived
mbed_official 107:414e9c822e99 23 * from this software without specific prior written permission.
mbed_official 107:414e9c822e99 24 *
mbed_official 107:414e9c822e99 25 * 4. This software may only be redistributed and used in connection with an
mbed_official 107:414e9c822e99 26 * Atmel microcontroller product.
mbed_official 107:414e9c822e99 27 *
mbed_official 107:414e9c822e99 28 * THIS SOFTWARE IS PROVIDED BY ATMEL "AS IS" AND ANY EXPRESS OR IMPLIED
mbed_official 107:414e9c822e99 29 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
mbed_official 107:414e9c822e99 30 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT ARE
mbed_official 107:414e9c822e99 31 * EXPRESSLY AND SPECIFICALLY DISCLAIMED. IN NO EVENT SHALL ATMEL BE LIABLE FOR
mbed_official 107:414e9c822e99 32 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
mbed_official 107:414e9c822e99 33 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
mbed_official 107:414e9c822e99 34 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
mbed_official 107:414e9c822e99 35 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
mbed_official 107:414e9c822e99 36 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
mbed_official 107:414e9c822e99 37 * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
mbed_official 107:414e9c822e99 38 * POSSIBILITY OF SUCH DAMAGE.
mbed_official 107:414e9c822e99 39 *
mbed_official 107:414e9c822e99 40 * \asf_license_stop
mbed_official 107:414e9c822e99 41 *
mbed_official 107:414e9c822e99 42 */
mbed_official 107:414e9c822e99 43 /*
mbed_official 107:414e9c822e99 44 * Support and FAQ: visit <a href="http://www.atmel.com/design-support/">Atmel Support</a>
mbed_official 107:414e9c822e99 45 */
mbed_official 107:414e9c822e99 46
mbed_official 107:414e9c822e99 47 #include "pio.h"
mbed_official 107:414e9c822e99 48 #include "pio_handler.h"
mbed_official 107:414e9c822e99 49
mbed_official 107:414e9c822e99 50 /**
mbed_official 107:414e9c822e99 51 * Maximum number of interrupt sources that can be defined. This
mbed_official 107:414e9c822e99 52 * constant can be increased, but the current value is the smallest possible one
mbed_official 107:414e9c822e99 53 * that will be compatible with all existing projects.
mbed_official 107:414e9c822e99 54 */
mbed_official 107:414e9c822e99 55 #define MAX_INTERRUPT_SOURCES 7
mbed_official 107:414e9c822e99 56
mbed_official 107:414e9c822e99 57 /**
mbed_official 107:414e9c822e99 58 * Describes a PIO interrupt source, including the PIO instance triggering the
mbed_official 107:414e9c822e99 59 * interrupt and the associated interrupt handler.
mbed_official 107:414e9c822e99 60 */
mbed_official 107:414e9c822e99 61 struct s_interrupt_source {
mbed_official 107:414e9c822e99 62 uint32_t id;
mbed_official 107:414e9c822e99 63 uint32_t mask;
mbed_official 107:414e9c822e99 64 uint32_t attr;
mbed_official 107:414e9c822e99 65
mbed_official 107:414e9c822e99 66 /* Interrupt handler. */
mbed_official 107:414e9c822e99 67 void (*handler) (const uint32_t, const uint32_t);
mbed_official 107:414e9c822e99 68 };
mbed_official 107:414e9c822e99 69
mbed_official 107:414e9c822e99 70
mbed_official 107:414e9c822e99 71 /* List of interrupt sources. */
mbed_official 107:414e9c822e99 72 static struct s_interrupt_source gs_interrupt_sources[MAX_INTERRUPT_SOURCES];
mbed_official 107:414e9c822e99 73
mbed_official 107:414e9c822e99 74 /* Number of currently defined interrupt sources. */
mbed_official 107:414e9c822e99 75 static uint32_t gs_ul_nb_sources = 0;
mbed_official 107:414e9c822e99 76
mbed_official 107:414e9c822e99 77 #if (SAM3S || SAM4S || SAM4E)
mbed_official 107:414e9c822e99 78 /* PIO Capture handler */
mbed_official 107:414e9c822e99 79 static void (*pio_capture_handler)(Pio *) = NULL;
mbed_official 107:414e9c822e99 80 extern uint32_t pio_capture_enable_flag;
mbed_official 107:414e9c822e99 81 #endif
mbed_official 107:414e9c822e99 82
mbed_official 107:414e9c822e99 83 /**
mbed_official 107:414e9c822e99 84 * \brief Process an interrupt request on the given PIO controller.
mbed_official 107:414e9c822e99 85 *
mbed_official 107:414e9c822e99 86 * \param p_pio PIO controller base address.
mbed_official 107:414e9c822e99 87 * \param ul_id PIO controller ID.
mbed_official 107:414e9c822e99 88 */
mbed_official 107:414e9c822e99 89 void pio_handler_process(Pio *p_pio, uint32_t ul_id)
mbed_official 107:414e9c822e99 90 {
mbed_official 107:414e9c822e99 91 uint32_t status;
mbed_official 107:414e9c822e99 92 uint32_t i;
mbed_official 107:414e9c822e99 93
mbed_official 107:414e9c822e99 94 /* Read PIO controller status */
mbed_official 107:414e9c822e99 95 status = pio_get_interrupt_status(p_pio);
mbed_official 107:414e9c822e99 96 status &= pio_get_interrupt_mask(p_pio);
mbed_official 107:414e9c822e99 97
mbed_official 107:414e9c822e99 98 /* Check pending events */
mbed_official 107:414e9c822e99 99 if (status != 0) {
mbed_official 107:414e9c822e99 100 /* Find triggering source */
mbed_official 107:414e9c822e99 101 i = 0;
mbed_official 107:414e9c822e99 102 while (status != 0) {
mbed_official 107:414e9c822e99 103 /* Source is configured on the same controller */
mbed_official 107:414e9c822e99 104 if (gs_interrupt_sources[i].id == ul_id) {
mbed_official 107:414e9c822e99 105 /* Source has PIOs whose statuses have changed */
mbed_official 107:414e9c822e99 106 if ((status & gs_interrupt_sources[i].mask) != 0) {
mbed_official 107:414e9c822e99 107 gs_interrupt_sources[i].handler(gs_interrupt_sources[i].id,
mbed_official 107:414e9c822e99 108 gs_interrupt_sources[i].mask);
mbed_official 107:414e9c822e99 109 status &= ~(gs_interrupt_sources[i].mask);
mbed_official 107:414e9c822e99 110 }
mbed_official 107:414e9c822e99 111 }
mbed_official 107:414e9c822e99 112 i++;
mbed_official 107:414e9c822e99 113 if (i >= MAX_INTERRUPT_SOURCES) {
mbed_official 107:414e9c822e99 114 break;
mbed_official 107:414e9c822e99 115 }
mbed_official 107:414e9c822e99 116 }
mbed_official 107:414e9c822e99 117 }
mbed_official 107:414e9c822e99 118
mbed_official 107:414e9c822e99 119 /* Check capture events */
mbed_official 107:414e9c822e99 120 #if (SAM3S || SAM4S || SAM4E)
mbed_official 107:414e9c822e99 121 if (pio_capture_enable_flag) {
mbed_official 107:414e9c822e99 122 if (pio_capture_handler) {
mbed_official 107:414e9c822e99 123 pio_capture_handler(p_pio);
mbed_official 107:414e9c822e99 124 }
mbed_official 107:414e9c822e99 125 }
mbed_official 107:414e9c822e99 126 #endif
mbed_official 107:414e9c822e99 127 }
mbed_official 107:414e9c822e99 128
mbed_official 107:414e9c822e99 129 /**
mbed_official 107:414e9c822e99 130 * \brief Set an interrupt handler for the provided pins.
mbed_official 107:414e9c822e99 131 * The provided handler will be called with the triggering pin as its parameter
mbed_official 107:414e9c822e99 132 * as soon as an interrupt is detected.
mbed_official 107:414e9c822e99 133 *
mbed_official 107:414e9c822e99 134 * \param p_pio PIO controller base address.
mbed_official 107:414e9c822e99 135 * \param ul_id PIO ID.
mbed_official 107:414e9c822e99 136 * \param ul_mask Pins (bit mask) to configure.
mbed_official 107:414e9c822e99 137 * \param ul_attr Pins attribute to configure.
mbed_official 107:414e9c822e99 138 * \param p_handler Interrupt handler function pointer.
mbed_official 107:414e9c822e99 139 *
mbed_official 107:414e9c822e99 140 * \return 0 if successful, 1 if the maximum number of sources has been defined.
mbed_official 107:414e9c822e99 141 */
mbed_official 107:414e9c822e99 142 uint32_t pio_handler_set(Pio *p_pio, uint32_t ul_id, uint32_t ul_mask,
mbed_official 107:414e9c822e99 143 uint32_t ul_attr, void (*p_handler) (uint32_t, uint32_t))
mbed_official 107:414e9c822e99 144 {
mbed_official 107:414e9c822e99 145 struct s_interrupt_source *pSource;
mbed_official 107:414e9c822e99 146
mbed_official 107:414e9c822e99 147 if (gs_ul_nb_sources >= MAX_INTERRUPT_SOURCES)
mbed_official 107:414e9c822e99 148 return 1;
mbed_official 107:414e9c822e99 149
mbed_official 107:414e9c822e99 150 /* Define new source */
mbed_official 107:414e9c822e99 151 pSource = &(gs_interrupt_sources[gs_ul_nb_sources]);
mbed_official 107:414e9c822e99 152 pSource->id = ul_id;
mbed_official 107:414e9c822e99 153 pSource->mask = ul_mask;
mbed_official 107:414e9c822e99 154 pSource->attr = ul_attr;
mbed_official 107:414e9c822e99 155 pSource->handler = p_handler;
mbed_official 107:414e9c822e99 156 gs_ul_nb_sources++;
mbed_official 107:414e9c822e99 157
mbed_official 107:414e9c822e99 158 /* Configure interrupt mode */
mbed_official 107:414e9c822e99 159 pio_configure_interrupt(p_pio, ul_mask, ul_attr);
mbed_official 107:414e9c822e99 160
mbed_official 107:414e9c822e99 161 return 0;
mbed_official 107:414e9c822e99 162 }
mbed_official 107:414e9c822e99 163
mbed_official 107:414e9c822e99 164 #if (SAM3S || SAM4S || SAM4E)
mbed_official 107:414e9c822e99 165 /**
mbed_official 107:414e9c822e99 166 * \brief Set a capture interrupt handler for all PIO.
mbed_official 107:414e9c822e99 167 *
mbed_official 107:414e9c822e99 168 * The handler will be called with the triggering PIO as its parameter
mbed_official 107:414e9c822e99 169 * as soon as an interrupt is detected.
mbed_official 107:414e9c822e99 170 *
mbed_official 107:414e9c822e99 171 * \param p_handler Interrupt handler function pointer.
mbed_official 107:414e9c822e99 172 *
mbed_official 107:414e9c822e99 173 */
mbed_official 107:414e9c822e99 174 void pio_capture_handler_set(void (*p_handler)(Pio *))
mbed_official 107:414e9c822e99 175 {
mbed_official 107:414e9c822e99 176 pio_capture_handler = p_handler;
mbed_official 107:414e9c822e99 177 }
mbed_official 107:414e9c822e99 178 #endif
mbed_official 107:414e9c822e99 179
mbed_official 107:414e9c822e99 180 #ifdef ID_PIOA
mbed_official 107:414e9c822e99 181 /**
mbed_official 107:414e9c822e99 182 * \brief Set an interrupt handler for the specified pin.
mbed_official 107:414e9c822e99 183 * The provided handler will be called with the triggering pin as its parameter
mbed_official 107:414e9c822e99 184 * as soon as an interrupt is detected.
mbed_official 107:414e9c822e99 185 *
mbed_official 107:414e9c822e99 186 * \param ul_pin Pin index to configure.
mbed_official 107:414e9c822e99 187 * \param ul_flag Pin flag.
mbed_official 107:414e9c822e99 188 * \param p_handler Interrupt handler function pointer.
mbed_official 107:414e9c822e99 189 *
mbed_official 107:414e9c822e99 190 * \return 0 if successful, 1 if the maximum number of sources has been defined.
mbed_official 107:414e9c822e99 191 */
mbed_official 107:414e9c822e99 192 uint32_t pio_handler_set_pin(uint32_t ul_pin, uint32_t ul_flag,
mbed_official 107:414e9c822e99 193 void (*p_handler) (uint32_t, uint32_t))
mbed_official 107:414e9c822e99 194 {
mbed_official 107:414e9c822e99 195 Pio *p_pio = pio_get_pin_group(ul_pin);
mbed_official 107:414e9c822e99 196 uint32_t group_id = pio_get_pin_group_id(ul_pin);
mbed_official 107:414e9c822e99 197 uint32_t group_mask = pio_get_pin_group_mask(ul_pin);
mbed_official 107:414e9c822e99 198
mbed_official 107:414e9c822e99 199 return pio_handler_set(p_pio, group_id, group_mask, ul_flag, p_handler);
mbed_official 107:414e9c822e99 200 }
mbed_official 107:414e9c822e99 201
mbed_official 107:414e9c822e99 202 /**
mbed_official 107:414e9c822e99 203 * \brief Parallel IO Controller A interrupt handler.
mbed_official 107:414e9c822e99 204 * Redefined PIOA interrupt handler for NVIC interrupt table.
mbed_official 107:414e9c822e99 205 */
mbed_official 107:414e9c822e99 206 void PIOA_Handler(void)
mbed_official 107:414e9c822e99 207 {
mbed_official 107:414e9c822e99 208 pio_handler_process(PIOA, ID_PIOA);
mbed_official 107:414e9c822e99 209 }
mbed_official 107:414e9c822e99 210 #endif
mbed_official 107:414e9c822e99 211
mbed_official 107:414e9c822e99 212 #ifdef ID_PIOB
mbed_official 107:414e9c822e99 213 /**
mbed_official 107:414e9c822e99 214 * \brief Parallel IO Controller B interrupt handler
mbed_official 107:414e9c822e99 215 * Redefined PIOB interrupt handler for NVIC interrupt table.
mbed_official 107:414e9c822e99 216 */
mbed_official 107:414e9c822e99 217 void PIOB_Handler(void)
mbed_official 107:414e9c822e99 218 {
mbed_official 107:414e9c822e99 219 pio_handler_process(PIOB, ID_PIOB);
mbed_official 107:414e9c822e99 220 }
mbed_official 107:414e9c822e99 221 #endif
mbed_official 107:414e9c822e99 222
mbed_official 107:414e9c822e99 223 #ifdef ID_PIOC
mbed_official 107:414e9c822e99 224 /**
mbed_official 107:414e9c822e99 225 * \brief Parallel IO Controller C interrupt handler.
mbed_official 107:414e9c822e99 226 * Redefined PIOC interrupt handler for NVIC interrupt table.
mbed_official 107:414e9c822e99 227 */
mbed_official 107:414e9c822e99 228 void PIOC_Handler(void)
mbed_official 107:414e9c822e99 229 {
mbed_official 107:414e9c822e99 230 pio_handler_process(PIOC, ID_PIOC);
mbed_official 107:414e9c822e99 231 }
mbed_official 107:414e9c822e99 232 #endif
mbed_official 107:414e9c822e99 233
mbed_official 107:414e9c822e99 234 #ifdef ID_PIOD
mbed_official 107:414e9c822e99 235 /**
mbed_official 107:414e9c822e99 236 * \brief Parallel IO Controller D interrupt handler.
mbed_official 107:414e9c822e99 237 * Redefined PIOD interrupt handler for NVIC interrupt table.
mbed_official 107:414e9c822e99 238 */
mbed_official 107:414e9c822e99 239 void PIOD_Handler(void)
mbed_official 107:414e9c822e99 240 {
mbed_official 107:414e9c822e99 241 pio_handler_process(PIOD, ID_PIOD);
mbed_official 107:414e9c822e99 242 }
mbed_official 107:414e9c822e99 243 #endif
mbed_official 107:414e9c822e99 244
mbed_official 107:414e9c822e99 245 #ifdef ID_PIOE
mbed_official 107:414e9c822e99 246 /**
mbed_official 107:414e9c822e99 247 * \brief Parallel IO Controller E interrupt handler.
mbed_official 107:414e9c822e99 248 * Redefined PIOE interrupt handler for NVIC interrupt table.
mbed_official 107:414e9c822e99 249 */
mbed_official 107:414e9c822e99 250 void PIOE_Handler(void)
mbed_official 107:414e9c822e99 251 {
mbed_official 107:414e9c822e99 252 pio_handler_process(PIOE, ID_PIOE);
mbed_official 107:414e9c822e99 253 }
mbed_official 107:414e9c822e99 254 #endif
mbed_official 107:414e9c822e99 255
mbed_official 107:414e9c822e99 256 #ifdef ID_PIOF
mbed_official 107:414e9c822e99 257 /**
mbed_official 107:414e9c822e99 258 * \brief Parallel IO Controller F interrupt handler.
mbed_official 107:414e9c822e99 259 * Redefined PIOF interrupt handler for NVIC interrupt table.
mbed_official 107:414e9c822e99 260 */
mbed_official 107:414e9c822e99 261 void PIOF_Handler(void)
mbed_official 107:414e9c822e99 262 {
mbed_official 107:414e9c822e99 263 pio_handler_process(PIOF, ID_PIOF);
mbed_official 107:414e9c822e99 264 }
mbed_official 107:414e9c822e99 265 #endif
mbed_official 107:414e9c822e99 266
mbed_official 107:414e9c822e99 267 /**
mbed_official 107:414e9c822e99 268 * \brief Initialize PIO interrupt management logic.
mbed_official 107:414e9c822e99 269 *
mbed_official 107:414e9c822e99 270 * \param p_pio PIO controller base address.
mbed_official 107:414e9c822e99 271 * \param ul_irqn NVIC line number.
mbed_official 107:414e9c822e99 272 * \param ul_priority PIO controller interrupts priority.
mbed_official 107:414e9c822e99 273 */
mbed_official 107:414e9c822e99 274 void pio_handler_set_priority(Pio *p_pio, IRQn_Type ul_irqn, uint32_t ul_priority)
mbed_official 107:414e9c822e99 275 {
mbed_official 107:414e9c822e99 276 uint32_t bitmask = 0;
mbed_official 107:414e9c822e99 277
mbed_official 107:414e9c822e99 278 bitmask = pio_get_interrupt_mask(p_pio);
mbed_official 107:414e9c822e99 279 pio_disable_interrupt(p_pio, 0xFFFFFFFF);
mbed_official 107:414e9c822e99 280 pio_get_interrupt_status(p_pio);
mbed_official 107:414e9c822e99 281 NVIC_DisableIRQ(ul_irqn);
mbed_official 107:414e9c822e99 282 NVIC_ClearPendingIRQ(ul_irqn);
mbed_official 107:414e9c822e99 283 NVIC_SetPriority(ul_irqn, ul_priority);
mbed_official 107:414e9c822e99 284 NVIC_EnableIRQ(ul_irqn);
mbed_official 107:414e9c822e99 285 pio_enable_interrupt(p_pio, bitmask);
mbed_official 107:414e9c822e99 286 }