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mbed library sources

Dependents:   Encrypted my_mbed lklk CyaSSL_DTLS_Cellular ... more

Superseded

This library was superseded by mbed-dev - https://os.mbed.com/users/mbed_official/code/mbed-dev/.

Development branch of the mbed library sources. This library is kept in synch with the latest changes from the mbed SDK and it is not guaranteed to work.

If you are looking for a stable and tested release, please import one of the official mbed library releases:

Import librarymbed

The official Mbed 2 C/C++ SDK provides the software platform and libraries to build your applications.

Last commit 20 Feb 2019 by mbed official

targets/hal/TARGET_STM/TARGET_STM32L4/gpio_irq_api.c@610:813dcc80987e, 2015-08-14 (annotated)

Committer:
mbed_official
Date:
Fri Aug 14 13:15:17 2015 +0100
Revision:
610:813dcc80987e
Synchronized with git revision 6d84db41c6833e0b9b024741eb0616a5f62d5599



Full URL: https://github.com/mbedmicro/mbed/commit/6d84db41c6833e0b9b024741eb0616a5f62d5599/



DISCO_F746NG - Improvements

Who changed what in which revision?

UserRevisionLine numberNew contents of line
mbed_official 610:813dcc80987e 1 /* mbed Microcontroller Library
mbed_official 610:813dcc80987e 2 *******************************************************************************
mbed_official 610:813dcc80987e 3 * Copyright (c) 2015, STMicroelectronics
mbed_official 610:813dcc80987e 4 * All rights reserved.
mbed_official 610:813dcc80987e 5 *
mbed_official 610:813dcc80987e 6 * Redistribution and use in source and binary forms, with or without
mbed_official 610:813dcc80987e 7 * modification, are permitted provided that the following conditions are met:
mbed_official 610:813dcc80987e 8 *
mbed_official 610:813dcc80987e 9 * 1. Redistributions of source code must retain the above copyright notice,
mbed_official 610:813dcc80987e 10 * this list of conditions and the following disclaimer.
mbed_official 610:813dcc80987e 11 * 2. Redistributions in binary form must reproduce the above copyright notice,
mbed_official 610:813dcc80987e 12 * this list of conditions and the following disclaimer in the documentation
mbed_official 610:813dcc80987e 13 * and/or other materials provided with the distribution.
mbed_official 610:813dcc80987e 14 * 3. Neither the name of STMicroelectronics nor the names of its contributors
mbed_official 610:813dcc80987e 15 * may be used to endorse or promote products derived from this software
mbed_official 610:813dcc80987e 16 * without specific prior written permission.
mbed_official 610:813dcc80987e 17 *
mbed_official 610:813dcc80987e 18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
mbed_official 610:813dcc80987e 19 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
mbed_official 610:813dcc80987e 20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
mbed_official 610:813dcc80987e 21 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
mbed_official 610:813dcc80987e 22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
mbed_official 610:813dcc80987e 23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
mbed_official 610:813dcc80987e 24 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
mbed_official 610:813dcc80987e 25 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
mbed_official 610:813dcc80987e 26 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
mbed_official 610:813dcc80987e 27 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
mbed_official 610:813dcc80987e 28 *******************************************************************************
mbed_official 610:813dcc80987e 29 */
mbed_official 610:813dcc80987e 30 #include <stddef.h>
mbed_official 610:813dcc80987e 31 #include "cmsis.h"
mbed_official 610:813dcc80987e 32 #include "gpio_irq_api.h"
mbed_official 610:813dcc80987e 33 #include "pinmap.h"
mbed_official 610:813dcc80987e 34 #include "mbed_error.h"
mbed_official 610:813dcc80987e 35
mbed_official 610:813dcc80987e 36 #define EDGE_NONE (0)
mbed_official 610:813dcc80987e 37 #define EDGE_RISE (1)
mbed_official 610:813dcc80987e 38 #define EDGE_FALL (2)
mbed_official 610:813dcc80987e 39 #define EDGE_BOTH (3)
mbed_official 610:813dcc80987e 40
mbed_official 610:813dcc80987e 41 // Number of EXTI irq vectors (EXTI0, EXTI1, EXTI2, EXTI3, EXTI4, EXTI5_9, EXTI10_15)
mbed_official 610:813dcc80987e 42 #define CHANNEL_NUM (7)
mbed_official 610:813dcc80987e 43
mbed_official 610:813dcc80987e 44 // Max pins for one line (max with EXTI10_15)
mbed_official 610:813dcc80987e 45 #define MAX_PIN_LINE (6)
mbed_official 610:813dcc80987e 46
mbed_official 610:813dcc80987e 47 typedef struct gpio_channel {
mbed_official 610:813dcc80987e 48 uint32_t pin_mask; // bitmask representing which pins are configured for receiving interrupts
mbed_official 610:813dcc80987e 49 uint32_t channel_ids[MAX_PIN_LINE]; // mbed "gpio_irq_t gpio_irq" field of instance
mbed_official 610:813dcc80987e 50 uint32_t channel_gpio[MAX_PIN_LINE]; // base address of gpio port group
mbed_official 610:813dcc80987e 51 uint32_t channel_pin[MAX_PIN_LINE]; // pin number in port group
mbed_official 610:813dcc80987e 52 } gpio_channel_t;
mbed_official 610:813dcc80987e 53
mbed_official 610:813dcc80987e 54 static gpio_channel_t channels[CHANNEL_NUM] = {
mbed_official 610:813dcc80987e 55 {.pin_mask = 0},
mbed_official 610:813dcc80987e 56 {.pin_mask = 0},
mbed_official 610:813dcc80987e 57 {.pin_mask = 0},
mbed_official 610:813dcc80987e 58 {.pin_mask = 0},
mbed_official 610:813dcc80987e 59 {.pin_mask = 0},
mbed_official 610:813dcc80987e 60 {.pin_mask = 0},
mbed_official 610:813dcc80987e 61 {.pin_mask = 0}
mbed_official 610:813dcc80987e 62 };
mbed_official 610:813dcc80987e 63
mbed_official 610:813dcc80987e 64 // Used to return the index for channels array.
mbed_official 610:813dcc80987e 65 static uint32_t pin_base_nr[16] = {
mbed_official 610:813dcc80987e 66 // EXTI0
mbed_official 610:813dcc80987e 67 0, // pin 0
mbed_official 610:813dcc80987e 68 // EXTI1
mbed_official 610:813dcc80987e 69 0, // pin 1
mbed_official 610:813dcc80987e 70 // EXTI2
mbed_official 610:813dcc80987e 71 0, // pin 2
mbed_official 610:813dcc80987e 72 // EXTI3
mbed_official 610:813dcc80987e 73 0, // pin 3
mbed_official 610:813dcc80987e 74 // EXTI4
mbed_official 610:813dcc80987e 75 0, // pin 4
mbed_official 610:813dcc80987e 76 // EXTI5_9
mbed_official 610:813dcc80987e 77 0, // pin 5
mbed_official 610:813dcc80987e 78 1, // pin 6
mbed_official 610:813dcc80987e 79 2, // pin 7
mbed_official 610:813dcc80987e 80 3, // pin 8
mbed_official 610:813dcc80987e 81 4, // pin 9
mbed_official 610:813dcc80987e 82 // EXTI10_15
mbed_official 610:813dcc80987e 83 0, // pin 10
mbed_official 610:813dcc80987e 84 1, // pin 11
mbed_official 610:813dcc80987e 85 2, // pin 12
mbed_official 610:813dcc80987e 86 3, // pin 13
mbed_official 610:813dcc80987e 87 4, // pin 14
mbed_official 610:813dcc80987e 88 5 // pin 15
mbed_official 610:813dcc80987e 89 };
mbed_official 610:813dcc80987e 90
mbed_official 610:813dcc80987e 91 static gpio_irq_handler irq_handler;
mbed_official 610:813dcc80987e 92
mbed_official 610:813dcc80987e 93 static void handle_interrupt_in(uint32_t irq_index, uint32_t max_num_pin_line)
mbed_official 610:813dcc80987e 94 {
mbed_official 610:813dcc80987e 95 gpio_channel_t *gpio_channel = &channels[irq_index];
mbed_official 610:813dcc80987e 96 uint32_t gpio_idx;
mbed_official 610:813dcc80987e 97
mbed_official 610:813dcc80987e 98 for (gpio_idx = 0; gpio_idx < max_num_pin_line; gpio_idx++) {
mbed_official 610:813dcc80987e 99 uint32_t current_mask = (1 << gpio_idx);
mbed_official 610:813dcc80987e 100
mbed_official 610:813dcc80987e 101 if (gpio_channel->pin_mask & current_mask) {
mbed_official 610:813dcc80987e 102 // Retrieve the gpio and pin that generate the irq
mbed_official 610:813dcc80987e 103 GPIO_TypeDef *gpio = (GPIO_TypeDef *)(gpio_channel->channel_gpio[gpio_idx]);
mbed_official 610:813dcc80987e 104 uint32_t pin = (uint32_t)(1 << (gpio_channel->channel_pin[gpio_idx]));
mbed_official 610:813dcc80987e 105
mbed_official 610:813dcc80987e 106 // Clear interrupt flag
mbed_official 610:813dcc80987e 107 if (__HAL_GPIO_EXTI_GET_FLAG(pin) != RESET) {
mbed_official 610:813dcc80987e 108 __HAL_GPIO_EXTI_CLEAR_FLAG(pin);
mbed_official 610:813dcc80987e 109
mbed_official 610:813dcc80987e 110 if (gpio_channel->channel_ids[gpio_idx] == 0) continue;
mbed_official 610:813dcc80987e 111
mbed_official 610:813dcc80987e 112 // Check which edge has generated the irq
mbed_official 610:813dcc80987e 113 if ((gpio->IDR & pin) == 0) {
mbed_official 610:813dcc80987e 114 irq_handler(gpio_channel->channel_ids[gpio_idx], IRQ_FALL);
mbed_official 610:813dcc80987e 115 } else {
mbed_official 610:813dcc80987e 116 irq_handler(gpio_channel->channel_ids[gpio_idx], IRQ_RISE);
mbed_official 610:813dcc80987e 117 }
mbed_official 610:813dcc80987e 118 }
mbed_official 610:813dcc80987e 119 }
mbed_official 610:813dcc80987e 120 }
mbed_official 610:813dcc80987e 121 }
mbed_official 610:813dcc80987e 122
mbed_official 610:813dcc80987e 123 // EXTI line 0
mbed_official 610:813dcc80987e 124 static void gpio_irq0(void)
mbed_official 610:813dcc80987e 125 {
mbed_official 610:813dcc80987e 126 handle_interrupt_in(0, 1);
mbed_official 610:813dcc80987e 127 }
mbed_official 610:813dcc80987e 128
mbed_official 610:813dcc80987e 129 // EXTI line 1
mbed_official 610:813dcc80987e 130 static void gpio_irq1(void)
mbed_official 610:813dcc80987e 131 {
mbed_official 610:813dcc80987e 132 handle_interrupt_in(1, 1);
mbed_official 610:813dcc80987e 133 }
mbed_official 610:813dcc80987e 134
mbed_official 610:813dcc80987e 135 // EXTI line 2
mbed_official 610:813dcc80987e 136 static void gpio_irq2(void)
mbed_official 610:813dcc80987e 137 {
mbed_official 610:813dcc80987e 138 handle_interrupt_in(2, 1);
mbed_official 610:813dcc80987e 139 }
mbed_official 610:813dcc80987e 140
mbed_official 610:813dcc80987e 141 // EXTI line 3
mbed_official 610:813dcc80987e 142 static void gpio_irq3(void)
mbed_official 610:813dcc80987e 143 {
mbed_official 610:813dcc80987e 144 handle_interrupt_in(3, 1);
mbed_official 610:813dcc80987e 145 }
mbed_official 610:813dcc80987e 146
mbed_official 610:813dcc80987e 147 // EXTI line 4
mbed_official 610:813dcc80987e 148 static void gpio_irq4(void)
mbed_official 610:813dcc80987e 149 {
mbed_official 610:813dcc80987e 150 handle_interrupt_in(4, 1);
mbed_official 610:813dcc80987e 151 }
mbed_official 610:813dcc80987e 152
mbed_official 610:813dcc80987e 153 // EXTI lines 5 to 9
mbed_official 610:813dcc80987e 154 static void gpio_irq5(void)
mbed_official 610:813dcc80987e 155 {
mbed_official 610:813dcc80987e 156 handle_interrupt_in(5, 5);
mbed_official 610:813dcc80987e 157 }
mbed_official 610:813dcc80987e 158
mbed_official 610:813dcc80987e 159 // EXTI lines 10 to 15
mbed_official 610:813dcc80987e 160 static void gpio_irq6(void)
mbed_official 610:813dcc80987e 161 {
mbed_official 610:813dcc80987e 162 handle_interrupt_in(6, 6);
mbed_official 610:813dcc80987e 163 }
mbed_official 610:813dcc80987e 164
mbed_official 610:813dcc80987e 165 extern uint32_t Set_GPIO_Clock(uint32_t port_idx);
mbed_official 610:813dcc80987e 166
mbed_official 610:813dcc80987e 167 int gpio_irq_init(gpio_irq_t *obj, PinName pin, gpio_irq_handler handler, uint32_t id)
mbed_official 610:813dcc80987e 168 {
mbed_official 610:813dcc80987e 169 IRQn_Type irq_n = (IRQn_Type)0;
mbed_official 610:813dcc80987e 170 uint32_t vector = 0;
mbed_official 610:813dcc80987e 171 uint32_t irq_index;
mbed_official 610:813dcc80987e 172 gpio_channel_t *gpio_channel;
mbed_official 610:813dcc80987e 173 uint32_t gpio_idx;
mbed_official 610:813dcc80987e 174
mbed_official 610:813dcc80987e 175 if (pin == NC) return -1;
mbed_official 610:813dcc80987e 176
mbed_official 610:813dcc80987e 177 uint32_t port_index = STM_PORT(pin);
mbed_official 610:813dcc80987e 178 uint32_t pin_index = STM_PIN(pin);
mbed_official 610:813dcc80987e 179
mbed_official 610:813dcc80987e 180 // Select irq number and interrupt routine
mbed_official 610:813dcc80987e 181 switch (pin_index) {
mbed_official 610:813dcc80987e 182 case 0:
mbed_official 610:813dcc80987e 183 irq_n = EXTI0_IRQn;
mbed_official 610:813dcc80987e 184 vector = (uint32_t)&gpio_irq0;
mbed_official 610:813dcc80987e 185 irq_index = 0;
mbed_official 610:813dcc80987e 186 break;
mbed_official 610:813dcc80987e 187 case 1:
mbed_official 610:813dcc80987e 188 irq_n = EXTI1_IRQn;
mbed_official 610:813dcc80987e 189 vector = (uint32_t)&gpio_irq1;
mbed_official 610:813dcc80987e 190 irq_index = 1;
mbed_official 610:813dcc80987e 191 break;
mbed_official 610:813dcc80987e 192 case 2:
mbed_official 610:813dcc80987e 193 irq_n = EXTI2_IRQn;
mbed_official 610:813dcc80987e 194 vector = (uint32_t)&gpio_irq2;
mbed_official 610:813dcc80987e 195 irq_index = 2;
mbed_official 610:813dcc80987e 196 break;
mbed_official 610:813dcc80987e 197 case 3:
mbed_official 610:813dcc80987e 198 irq_n = EXTI3_IRQn;
mbed_official 610:813dcc80987e 199 vector = (uint32_t)&gpio_irq3;
mbed_official 610:813dcc80987e 200 irq_index = 3;
mbed_official 610:813dcc80987e 201 break;
mbed_official 610:813dcc80987e 202 case 4:
mbed_official 610:813dcc80987e 203 irq_n = EXTI4_IRQn;
mbed_official 610:813dcc80987e 204 vector = (uint32_t)&gpio_irq4;
mbed_official 610:813dcc80987e 205 irq_index = 4;
mbed_official 610:813dcc80987e 206 break;
mbed_official 610:813dcc80987e 207 case 5:
mbed_official 610:813dcc80987e 208 case 6:
mbed_official 610:813dcc80987e 209 case 7:
mbed_official 610:813dcc80987e 210 case 8:
mbed_official 610:813dcc80987e 211 case 9:
mbed_official 610:813dcc80987e 212 irq_n = EXTI9_5_IRQn;
mbed_official 610:813dcc80987e 213 vector = (uint32_t)&gpio_irq5;
mbed_official 610:813dcc80987e 214 irq_index = 5;
mbed_official 610:813dcc80987e 215 break;
mbed_official 610:813dcc80987e 216 case 10:
mbed_official 610:813dcc80987e 217 case 11:
mbed_official 610:813dcc80987e 218 case 12:
mbed_official 610:813dcc80987e 219 case 13:
mbed_official 610:813dcc80987e 220 case 14:
mbed_official 610:813dcc80987e 221 case 15:
mbed_official 610:813dcc80987e 222 irq_n = EXTI15_10_IRQn;
mbed_official 610:813dcc80987e 223 vector = (uint32_t)&gpio_irq6;
mbed_official 610:813dcc80987e 224 irq_index = 6;
mbed_official 610:813dcc80987e 225 break;
mbed_official 610:813dcc80987e 226 default:
mbed_official 610:813dcc80987e 227 error("InterruptIn error: pin not supported\n");
mbed_official 610:813dcc80987e 228 return -1;
mbed_official 610:813dcc80987e 229 }
mbed_official 610:813dcc80987e 230
mbed_official 610:813dcc80987e 231 // Enable GPIO clock
mbed_official 610:813dcc80987e 232 uint32_t gpio_add = Set_GPIO_Clock(port_index);
mbed_official 610:813dcc80987e 233
mbed_official 610:813dcc80987e 234 // Configure GPIO
mbed_official 610:813dcc80987e 235 pin_function(pin, STM_PIN_DATA(STM_MODE_IT_FALLING, GPIO_NOPULL, 0));
mbed_official 610:813dcc80987e 236
mbed_official 610:813dcc80987e 237 // Enable EXTI interrupt
mbed_official 610:813dcc80987e 238 NVIC_SetVector(irq_n, vector);
mbed_official 610:813dcc80987e 239 NVIC_EnableIRQ(irq_n);
mbed_official 610:813dcc80987e 240
mbed_official 610:813dcc80987e 241 // Save informations for future use
mbed_official 610:813dcc80987e 242 obj->irq_n = irq_n;
mbed_official 610:813dcc80987e 243 obj->irq_index = irq_index;
mbed_official 610:813dcc80987e 244 obj->event = EDGE_NONE;
mbed_official 610:813dcc80987e 245 obj->pin = pin;
mbed_official 610:813dcc80987e 246
mbed_official 610:813dcc80987e 247 gpio_channel = &channels[irq_index];
mbed_official 610:813dcc80987e 248 gpio_idx = pin_base_nr[pin_index];
mbed_official 610:813dcc80987e 249 gpio_channel->pin_mask |= (1 << gpio_idx);
mbed_official 610:813dcc80987e 250 gpio_channel->channel_ids[gpio_idx] = id;
mbed_official 610:813dcc80987e 251 gpio_channel->channel_gpio[gpio_idx] = gpio_add;
mbed_official 610:813dcc80987e 252 gpio_channel->channel_pin[gpio_idx] = pin_index;
mbed_official 610:813dcc80987e 253
mbed_official 610:813dcc80987e 254 irq_handler = handler;
mbed_official 610:813dcc80987e 255
mbed_official 610:813dcc80987e 256 return 0;
mbed_official 610:813dcc80987e 257 }
mbed_official 610:813dcc80987e 258
mbed_official 610:813dcc80987e 259 void gpio_irq_free(gpio_irq_t *obj)
mbed_official 610:813dcc80987e 260 {
mbed_official 610:813dcc80987e 261 gpio_channel_t *gpio_channel = &channels[obj->irq_index];
mbed_official 610:813dcc80987e 262 uint32_t pin_index = STM_PIN(obj->pin);
mbed_official 610:813dcc80987e 263 uint32_t gpio_idx = pin_base_nr[pin_index];
mbed_official 610:813dcc80987e 264
mbed_official 610:813dcc80987e 265 gpio_channel->pin_mask &= ~(1 << gpio_idx);
mbed_official 610:813dcc80987e 266 gpio_channel->channel_ids[gpio_idx] = 0;
mbed_official 610:813dcc80987e 267 gpio_channel->channel_gpio[gpio_idx] = 0;
mbed_official 610:813dcc80987e 268 gpio_channel->channel_pin[gpio_idx] = 0;
mbed_official 610:813dcc80987e 269
mbed_official 610:813dcc80987e 270 // Disable EXTI line
mbed_official 610:813dcc80987e 271 pin_function(obj->pin, STM_PIN_DATA(STM_MODE_INPUT, GPIO_NOPULL, 0));
mbed_official 610:813dcc80987e 272 obj->event = EDGE_NONE;
mbed_official 610:813dcc80987e 273 }
mbed_official 610:813dcc80987e 274
mbed_official 610:813dcc80987e 275 void gpio_irq_set(gpio_irq_t *obj, gpio_irq_event event, uint32_t enable)
mbed_official 610:813dcc80987e 276 {
mbed_official 610:813dcc80987e 277 uint32_t mode = STM_MODE_IT_EVT_RESET;
mbed_official 610:813dcc80987e 278 uint32_t pull = GPIO_NOPULL;
mbed_official 610:813dcc80987e 279
mbed_official 610:813dcc80987e 280 if (enable) {
mbed_official 610:813dcc80987e 281 if (event == IRQ_RISE) {
mbed_official 610:813dcc80987e 282 if ((obj->event == EDGE_FALL) || (obj->event == EDGE_BOTH)) {
mbed_official 610:813dcc80987e 283 mode = STM_MODE_IT_RISING_FALLING;
mbed_official 610:813dcc80987e 284 obj->event = EDGE_BOTH;
mbed_official 610:813dcc80987e 285 } else { // NONE or RISE
mbed_official 610:813dcc80987e 286 mode = STM_MODE_IT_RISING;
mbed_official 610:813dcc80987e 287 obj->event = EDGE_RISE;
mbed_official 610:813dcc80987e 288 }
mbed_official 610:813dcc80987e 289 }
mbed_official 610:813dcc80987e 290 if (event == IRQ_FALL) {
mbed_official 610:813dcc80987e 291 if ((obj->event == EDGE_RISE) || (obj->event == EDGE_BOTH)) {
mbed_official 610:813dcc80987e 292 mode = STM_MODE_IT_RISING_FALLING;
mbed_official 610:813dcc80987e 293 obj->event = EDGE_BOTH;
mbed_official 610:813dcc80987e 294 } else { // NONE or FALL
mbed_official 610:813dcc80987e 295 mode = STM_MODE_IT_FALLING;
mbed_official 610:813dcc80987e 296 obj->event = EDGE_FALL;
mbed_official 610:813dcc80987e 297 }
mbed_official 610:813dcc80987e 298 }
mbed_official 610:813dcc80987e 299 } else { // Disable
mbed_official 610:813dcc80987e 300 if (event == IRQ_RISE) {
mbed_official 610:813dcc80987e 301 if ((obj->event == EDGE_FALL) || (obj->event == EDGE_BOTH)) {
mbed_official 610:813dcc80987e 302 mode = STM_MODE_IT_FALLING;
mbed_official 610:813dcc80987e 303 obj->event = EDGE_FALL;
mbed_official 610:813dcc80987e 304 } else { // NONE or RISE
mbed_official 610:813dcc80987e 305 mode = STM_MODE_IT_EVT_RESET;
mbed_official 610:813dcc80987e 306 obj->event = EDGE_NONE;
mbed_official 610:813dcc80987e 307 }
mbed_official 610:813dcc80987e 308 }
mbed_official 610:813dcc80987e 309 if (event == IRQ_FALL) {
mbed_official 610:813dcc80987e 310 if ((obj->event == EDGE_RISE) || (obj->event == EDGE_BOTH)) {
mbed_official 610:813dcc80987e 311 mode = STM_MODE_IT_RISING;
mbed_official 610:813dcc80987e 312 obj->event = EDGE_RISE;
mbed_official 610:813dcc80987e 313 } else { // NONE or FALL
mbed_official 610:813dcc80987e 314 mode = STM_MODE_IT_EVT_RESET;
mbed_official 610:813dcc80987e 315 obj->event = EDGE_NONE;
mbed_official 610:813dcc80987e 316 }
mbed_official 610:813dcc80987e 317 }
mbed_official 610:813dcc80987e 318 }
mbed_official 610:813dcc80987e 319
mbed_official 610:813dcc80987e 320 pin_function(obj->pin, STM_PIN_DATA(mode, pull, 0));
mbed_official 610:813dcc80987e 321 }
mbed_official 610:813dcc80987e 322
mbed_official 610:813dcc80987e 323 void gpio_irq_enable(gpio_irq_t *obj)
mbed_official 610:813dcc80987e 324 {
mbed_official 610:813dcc80987e 325 NVIC_EnableIRQ(obj->irq_n);
mbed_official 610:813dcc80987e 326 }
mbed_official 610:813dcc80987e 327
mbed_official 610:813dcc80987e 328 void gpio_irq_disable(gpio_irq_t *obj)
mbed_official 610:813dcc80987e 329 {
mbed_official 610:813dcc80987e 330 NVIC_DisableIRQ(obj->irq_n);
mbed_official 610:813dcc80987e 331 obj->event = EDGE_NONE;
mbed_official 610:813dcc80987e 332 }