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mbed library sources

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Superseded

This library was superseded by mbed-dev - https://os.mbed.com/users/mbed_official/code/mbed-dev/.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_STM32F3/gpio_irq_api.c@621:9c82b0f79f3d, 2015-09-11 (annotated)

Committer:
mbed_official
Date:
Fri Sep 11 09:30:09 2015 +0100
Revision:
621:9c82b0f79f3d
Parent:
508:4f5903e025e6 
Synchronized with git revision 6c1d63e069ab9bd86de92e8296ca783681257538



Full URL: https://github.com/mbedmicro/mbed/commit/6c1d63e069ab9bd86de92e8296ca783681257538/



ignore target files not supported by the yotta module

Who changed what in which revision?

UserRevisionLine numberNew contents of line
mbed_official 423:560d1a9f3083 1 /* mbed Microcontroller Library
mbed_official 423:560d1a9f3083 2 *******************************************************************************
mbed_official 423:560d1a9f3083 3 * Copyright (c) 2014, STMicroelectronics
mbed_official 423:560d1a9f3083 4 * All rights reserved.
mbed_official 423:560d1a9f3083 5 *
mbed_official 423:560d1a9f3083 6 * Redistribution and use in source and binary forms, with or without
mbed_official 423:560d1a9f3083 7 * modification, are permitted provided that the following conditions are met:
mbed_official 423:560d1a9f3083 8 *
mbed_official 423:560d1a9f3083 9 * 1. Redistributions of source code must retain the above copyright notice,
mbed_official 423:560d1a9f3083 10 * this list of conditions and the following disclaimer.
mbed_official 423:560d1a9f3083 11 * 2. Redistributions in binary form must reproduce the above copyright notice,
mbed_official 423:560d1a9f3083 12 * this list of conditions and the following disclaimer in the documentation
mbed_official 423:560d1a9f3083 13 * and/or other materials provided with the distribution.
mbed_official 423:560d1a9f3083 14 * 3. Neither the name of STMicroelectronics nor the names of its contributors
mbed_official 423:560d1a9f3083 15 * may be used to endorse or promote products derived from this software
mbed_official 423:560d1a9f3083 16 * without specific prior written permission.
mbed_official 423:560d1a9f3083 17 *
mbed_official 423:560d1a9f3083 18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
mbed_official 423:560d1a9f3083 19 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
mbed_official 423:560d1a9f3083 20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
mbed_official 423:560d1a9f3083 21 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
mbed_official 423:560d1a9f3083 22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
mbed_official 423:560d1a9f3083 23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
mbed_official 423:560d1a9f3083 24 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
mbed_official 423:560d1a9f3083 25 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
mbed_official 423:560d1a9f3083 26 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
mbed_official 423:560d1a9f3083 27 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
mbed_official 423:560d1a9f3083 28 *******************************************************************************
mbed_official 423:560d1a9f3083 29 */
mbed_official 423:560d1a9f3083 30 #include <stddef.h>
mbed_official 423:560d1a9f3083 31 #include "cmsis.h"
mbed_official 423:560d1a9f3083 32 #include "gpio_irq_api.h"
mbed_official 423:560d1a9f3083 33 #include "pinmap.h"
mbed_official 423:560d1a9f3083 34 #include "mbed_error.h"
mbed_official 423:560d1a9f3083 35
mbed_official 423:560d1a9f3083 36 #define EDGE_NONE (0)
mbed_official 423:560d1a9f3083 37 #define EDGE_RISE (1)
mbed_official 423:560d1a9f3083 38 #define EDGE_FALL (2)
mbed_official 423:560d1a9f3083 39 #define EDGE_BOTH (3)
mbed_official 423:560d1a9f3083 40
mbed_official 423:560d1a9f3083 41 // Number of EXTI irq vectors (EXTI0, EXTI1, EXTI2, EXTI3, EXTI4, EXTI5_9, EXTI10_15)
mbed_official 423:560d1a9f3083 42 #define CHANNEL_NUM (7)
mbed_official 423:560d1a9f3083 43
mbed_official 423:560d1a9f3083 44 // Max pins for one line (max with EXTI10_15)
mbed_official 423:560d1a9f3083 45 #define MAX_PIN_LINE (6)
mbed_official 423:560d1a9f3083 46
mbed_official 423:560d1a9f3083 47 typedef struct gpio_channel {
mbed_official 423:560d1a9f3083 48 uint32_t pin_mask; // bitmask representing which pins are configured for receiving interrupts
mbed_official 423:560d1a9f3083 49 uint32_t channel_ids[MAX_PIN_LINE]; // mbed "gpio_irq_t gpio_irq" field of instance
mbed_official 423:560d1a9f3083 50 uint32_t channel_gpio[MAX_PIN_LINE]; // base address of gpio port group
mbed_official 423:560d1a9f3083 51 uint32_t channel_pin[MAX_PIN_LINE]; // pin number in port group
mbed_official 423:560d1a9f3083 52 } gpio_channel_t;
mbed_official 423:560d1a9f3083 53
mbed_official 423:560d1a9f3083 54 static gpio_channel_t channels[CHANNEL_NUM] = {
mbed_official 423:560d1a9f3083 55 {.pin_mask = 0},
mbed_official 423:560d1a9f3083 56 {.pin_mask = 0},
mbed_official 423:560d1a9f3083 57 {.pin_mask = 0},
mbed_official 423:560d1a9f3083 58 {.pin_mask = 0},
mbed_official 423:560d1a9f3083 59 {.pin_mask = 0},
mbed_official 423:560d1a9f3083 60 {.pin_mask = 0},
mbed_official 423:560d1a9f3083 61 {.pin_mask = 0}
mbed_official 423:560d1a9f3083 62 };
mbed_official 423:560d1a9f3083 63
mbed_official 423:560d1a9f3083 64 // Used to return the index for channels array.
mbed_official 423:560d1a9f3083 65 static uint32_t pin_base_nr[16] = {
mbed_official 423:560d1a9f3083 66 // EXTI0
mbed_official 423:560d1a9f3083 67 0, // pin 0
mbed_official 423:560d1a9f3083 68 // EXTI1
mbed_official 423:560d1a9f3083 69 0, // pin 1
mbed_official 423:560d1a9f3083 70 // EXTI2
mbed_official 423:560d1a9f3083 71 0, // pin 2
mbed_official 423:560d1a9f3083 72 // EXTI3
mbed_official 423:560d1a9f3083 73 0, // pin 3
mbed_official 423:560d1a9f3083 74 // EXTI4
mbed_official 423:560d1a9f3083 75 0, // pin 4
mbed_official 423:560d1a9f3083 76 // EXTI5_9
mbed_official 423:560d1a9f3083 77 0, // pin 5
mbed_official 423:560d1a9f3083 78 1, // pin 6
mbed_official 423:560d1a9f3083 79 2, // pin 7
mbed_official 423:560d1a9f3083 80 3, // pin 8
mbed_official 423:560d1a9f3083 81 4, // pin 9
mbed_official 423:560d1a9f3083 82 // EXTI10_15
mbed_official 423:560d1a9f3083 83 0, // pin 10
mbed_official 423:560d1a9f3083 84 1, // pin 11
mbed_official 423:560d1a9f3083 85 2, // pin 12
mbed_official 423:560d1a9f3083 86 3, // pin 13
mbed_official 423:560d1a9f3083 87 4, // pin 14
mbed_official 423:560d1a9f3083 88 5 // pin 15
mbed_official 423:560d1a9f3083 89 };
mbed_official 423:560d1a9f3083 90
mbed_official 423:560d1a9f3083 91 static gpio_irq_handler irq_handler;
mbed_official 423:560d1a9f3083 92
mbed_official 423:560d1a9f3083 93 static void handle_interrupt_in(uint32_t irq_index, uint32_t max_num_pin_line)
mbed_official 423:560d1a9f3083 94 {
mbed_official 423:560d1a9f3083 95 gpio_channel_t *gpio_channel = &channels[irq_index];
mbed_official 423:560d1a9f3083 96 uint32_t gpio_idx;
mbed_official 423:560d1a9f3083 97
mbed_official 423:560d1a9f3083 98 for (gpio_idx = 0; gpio_idx < max_num_pin_line; gpio_idx++) {
mbed_official 423:560d1a9f3083 99 uint32_t current_mask = (1 << gpio_idx);
mbed_official 423:560d1a9f3083 100
mbed_official 423:560d1a9f3083 101 if (gpio_channel->pin_mask & current_mask) {
mbed_official 423:560d1a9f3083 102 // Retrieve the gpio and pin that generate the irq
mbed_official 423:560d1a9f3083 103 GPIO_TypeDef *gpio = (GPIO_TypeDef *)(gpio_channel->channel_gpio[gpio_idx]);
mbed_official 423:560d1a9f3083 104 uint32_t pin = (uint32_t)(1 << (gpio_channel->channel_pin[gpio_idx]));
mbed_official 423:560d1a9f3083 105
mbed_official 423:560d1a9f3083 106 // Clear interrupt flag
mbed_official 423:560d1a9f3083 107 if (__HAL_GPIO_EXTI_GET_FLAG(pin) != RESET) {
mbed_official 423:560d1a9f3083 108 __HAL_GPIO_EXTI_CLEAR_FLAG(pin);
mbed_official 423:560d1a9f3083 109
mbed_official 423:560d1a9f3083 110 if (gpio_channel->channel_ids[gpio_idx] == 0) continue;
mbed_official 423:560d1a9f3083 111
mbed_official 423:560d1a9f3083 112 // Check which edge has generated the irq
mbed_official 423:560d1a9f3083 113 if ((gpio->IDR & pin) == 0) {
mbed_official 423:560d1a9f3083 114 irq_handler(gpio_channel->channel_ids[gpio_idx], IRQ_FALL);
mbed_official 423:560d1a9f3083 115 } else {
mbed_official 423:560d1a9f3083 116 irq_handler(gpio_channel->channel_ids[gpio_idx], IRQ_RISE);
mbed_official 423:560d1a9f3083 117 }
mbed_official 423:560d1a9f3083 118 }
mbed_official 423:560d1a9f3083 119 }
mbed_official 423:560d1a9f3083 120 }
mbed_official 423:560d1a9f3083 121 }
mbed_official 423:560d1a9f3083 122
mbed_official 423:560d1a9f3083 123 // EXTI line 0
mbed_official 423:560d1a9f3083 124 static void gpio_irq0(void)
mbed_official 423:560d1a9f3083 125 {
mbed_official 423:560d1a9f3083 126 handle_interrupt_in(0, 1);
mbed_official 423:560d1a9f3083 127 }
mbed_official 423:560d1a9f3083 128
mbed_official 423:560d1a9f3083 129 // EXTI line 1
mbed_official 423:560d1a9f3083 130 static void gpio_irq1(void)
mbed_official 423:560d1a9f3083 131 {
mbed_official 423:560d1a9f3083 132 handle_interrupt_in(1, 1);
mbed_official 423:560d1a9f3083 133 }
mbed_official 423:560d1a9f3083 134
mbed_official 423:560d1a9f3083 135 // EXTI line 2
mbed_official 423:560d1a9f3083 136 static void gpio_irq2(void)
mbed_official 423:560d1a9f3083 137 {
mbed_official 423:560d1a9f3083 138 handle_interrupt_in(2, 1);
mbed_official 423:560d1a9f3083 139 }
mbed_official 423:560d1a9f3083 140
mbed_official 423:560d1a9f3083 141 // EXTI line 3
mbed_official 423:560d1a9f3083 142 static void gpio_irq3(void)
mbed_official 423:560d1a9f3083 143 {
mbed_official 423:560d1a9f3083 144 handle_interrupt_in(3, 1);
mbed_official 423:560d1a9f3083 145 }
mbed_official 423:560d1a9f3083 146
mbed_official 423:560d1a9f3083 147 // EXTI line 4
mbed_official 423:560d1a9f3083 148 static void gpio_irq4(void)
mbed_official 423:560d1a9f3083 149 {
mbed_official 423:560d1a9f3083 150 handle_interrupt_in(4, 1);
mbed_official 423:560d1a9f3083 151 }
mbed_official 423:560d1a9f3083 152
mbed_official 423:560d1a9f3083 153 // EXTI lines 5 to 9
mbed_official 423:560d1a9f3083 154 static void gpio_irq5(void)
mbed_official 423:560d1a9f3083 155 {
mbed_official 423:560d1a9f3083 156 handle_interrupt_in(5, 5);
mbed_official 423:560d1a9f3083 157 }
mbed_official 423:560d1a9f3083 158
mbed_official 423:560d1a9f3083 159 // EXTI lines 10 to 15
mbed_official 423:560d1a9f3083 160 static void gpio_irq6(void)
mbed_official 423:560d1a9f3083 161 {
mbed_official 423:560d1a9f3083 162 handle_interrupt_in(6, 6);
mbed_official 423:560d1a9f3083 163 }
mbed_official 423:560d1a9f3083 164
mbed_official 423:560d1a9f3083 165 extern uint32_t Set_GPIO_Clock(uint32_t port_idx);
mbed_official 423:560d1a9f3083 166
mbed_official 423:560d1a9f3083 167 int gpio_irq_init(gpio_irq_t *obj, PinName pin, gpio_irq_handler handler, uint32_t id)
mbed_official 423:560d1a9f3083 168 {
mbed_official 423:560d1a9f3083 169 IRQn_Type irq_n = (IRQn_Type)0;
mbed_official 423:560d1a9f3083 170 uint32_t vector = 0;
mbed_official 423:560d1a9f3083 171 uint32_t irq_index;
mbed_official 423:560d1a9f3083 172 gpio_channel_t *gpio_channel;
mbed_official 423:560d1a9f3083 173 uint32_t gpio_idx;
mbed_official 423:560d1a9f3083 174
mbed_official 423:560d1a9f3083 175 if (pin == NC) return -1;
mbed_official 423:560d1a9f3083 176
mbed_official 423:560d1a9f3083 177 uint32_t port_index = STM_PORT(pin);
mbed_official 423:560d1a9f3083 178 uint32_t pin_index = STM_PIN(pin);
mbed_official 423:560d1a9f3083 179
mbed_official 423:560d1a9f3083 180 // Select irq number and interrupt routine
mbed_official 423:560d1a9f3083 181 switch (pin_index) {
mbed_official 423:560d1a9f3083 182 case 0:
mbed_official 423:560d1a9f3083 183 irq_n = EXTI0_IRQn;
mbed_official 423:560d1a9f3083 184 vector = (uint32_t)&gpio_irq0;
mbed_official 423:560d1a9f3083 185 irq_index = 0;
mbed_official 423:560d1a9f3083 186 break;
mbed_official 423:560d1a9f3083 187 case 1:
mbed_official 423:560d1a9f3083 188 irq_n = EXTI1_IRQn;
mbed_official 423:560d1a9f3083 189 vector = (uint32_t)&gpio_irq1;
mbed_official 423:560d1a9f3083 190 irq_index = 1;
mbed_official 423:560d1a9f3083 191 break;
mbed_official 423:560d1a9f3083 192 case 2:
mbed_official 423:560d1a9f3083 193 irq_n = EXTI2_TSC_IRQn;
mbed_official 423:560d1a9f3083 194 vector = (uint32_t)&gpio_irq2;
mbed_official 423:560d1a9f3083 195 irq_index = 2;
mbed_official 423:560d1a9f3083 196 break;
mbed_official 423:560d1a9f3083 197 case 3:
mbed_official 423:560d1a9f3083 198 irq_n = EXTI3_IRQn;
mbed_official 423:560d1a9f3083 199 vector = (uint32_t)&gpio_irq3;
mbed_official 423:560d1a9f3083 200 irq_index = 3;
mbed_official 423:560d1a9f3083 201 break;
mbed_official 423:560d1a9f3083 202 case 4:
mbed_official 423:560d1a9f3083 203 irq_n = EXTI4_IRQn;
mbed_official 423:560d1a9f3083 204 vector = (uint32_t)&gpio_irq4;
mbed_official 423:560d1a9f3083 205 irq_index = 4;
mbed_official 423:560d1a9f3083 206 break;
mbed_official 423:560d1a9f3083 207 case 5:
mbed_official 423:560d1a9f3083 208 case 6:
mbed_official 423:560d1a9f3083 209 case 7:
mbed_official 423:560d1a9f3083 210 case 8:
mbed_official 423:560d1a9f3083 211 case 9:
mbed_official 423:560d1a9f3083 212 irq_n = EXTI9_5_IRQn;
mbed_official 423:560d1a9f3083 213 vector = (uint32_t)&gpio_irq5;
mbed_official 423:560d1a9f3083 214 irq_index = 5;
mbed_official 423:560d1a9f3083 215 break;
mbed_official 423:560d1a9f3083 216 case 10:
mbed_official 423:560d1a9f3083 217 case 11:
mbed_official 423:560d1a9f3083 218 case 12:
mbed_official 423:560d1a9f3083 219 case 13:
mbed_official 423:560d1a9f3083 220 case 14:
mbed_official 423:560d1a9f3083 221 case 15:
mbed_official 423:560d1a9f3083 222 irq_n = EXTI15_10_IRQn;
mbed_official 423:560d1a9f3083 223 vector = (uint32_t)&gpio_irq6;
mbed_official 423:560d1a9f3083 224 irq_index = 6;
mbed_official 423:560d1a9f3083 225 break;
mbed_official 423:560d1a9f3083 226 default:
mbed_official 423:560d1a9f3083 227 error("InterruptIn error: pin not supported.\n");
mbed_official 423:560d1a9f3083 228 return -1;
mbed_official 423:560d1a9f3083 229 }
mbed_official 423:560d1a9f3083 230
mbed_official 423:560d1a9f3083 231 // Enable GPIO clock
mbed_official 423:560d1a9f3083 232 uint32_t gpio_add = Set_GPIO_Clock(port_index);
mbed_official 423:560d1a9f3083 233
mbed_official 423:560d1a9f3083 234 // Configure GPIO
mbed_official 423:560d1a9f3083 235 pin_function(pin, STM_PIN_DATA(STM_MODE_IT_FALLING, GPIO_NOPULL, 0));
mbed_official 423:560d1a9f3083 236
mbed_official 423:560d1a9f3083 237 // Enable EXTI interrupt
mbed_official 423:560d1a9f3083 238 NVIC_SetVector(irq_n, vector);
mbed_official 423:560d1a9f3083 239 NVIC_EnableIRQ(irq_n);
mbed_official 423:560d1a9f3083 240
mbed_official 423:560d1a9f3083 241 // Save informations for future use
mbed_official 423:560d1a9f3083 242 obj->irq_n = irq_n;
mbed_official 423:560d1a9f3083 243 obj->irq_index = irq_index;
mbed_official 423:560d1a9f3083 244 obj->event = EDGE_NONE;
mbed_official 423:560d1a9f3083 245 obj->pin = pin;
mbed_official 423:560d1a9f3083 246
mbed_official 423:560d1a9f3083 247 gpio_channel = &channels[irq_index];
mbed_official 423:560d1a9f3083 248 gpio_idx = pin_base_nr[pin_index];
mbed_official 423:560d1a9f3083 249 gpio_channel->pin_mask |= (1 << gpio_idx);
mbed_official 423:560d1a9f3083 250 gpio_channel->channel_ids[gpio_idx] = id;
mbed_official 423:560d1a9f3083 251 gpio_channel->channel_gpio[gpio_idx] = gpio_add;
mbed_official 423:560d1a9f3083 252 gpio_channel->channel_pin[gpio_idx] = pin_index;
mbed_official 423:560d1a9f3083 253
mbed_official 423:560d1a9f3083 254 irq_handler = handler;
mbed_official 423:560d1a9f3083 255
mbed_official 423:560d1a9f3083 256 return 0;
mbed_official 423:560d1a9f3083 257 }
mbed_official 423:560d1a9f3083 258
mbed_official 423:560d1a9f3083 259 void gpio_irq_free(gpio_irq_t *obj)
mbed_official 423:560d1a9f3083 260 {
mbed_official 423:560d1a9f3083 261 gpio_channel_t *gpio_channel = &channels[obj->irq_index];
mbed_official 423:560d1a9f3083 262 uint32_t pin_index = STM_PIN(obj->pin);
mbed_official 423:560d1a9f3083 263 uint32_t gpio_idx = pin_base_nr[pin_index];
mbed_official 423:560d1a9f3083 264
mbed_official 423:560d1a9f3083 265 gpio_channel->pin_mask &= ~(1 << gpio_idx);
mbed_official 423:560d1a9f3083 266 gpio_channel->channel_ids[gpio_idx] = 0;
mbed_official 423:560d1a9f3083 267 gpio_channel->channel_gpio[gpio_idx] = 0;
mbed_official 423:560d1a9f3083 268 gpio_channel->channel_pin[gpio_idx] = 0;
mbed_official 423:560d1a9f3083 269
mbed_official 423:560d1a9f3083 270 // Disable EXTI line
mbed_official 423:560d1a9f3083 271 pin_function(obj->pin, STM_PIN_DATA(STM_MODE_INPUT, GPIO_NOPULL, 0));
mbed_official 423:560d1a9f3083 272 obj->event = EDGE_NONE;
mbed_official 423:560d1a9f3083 273 }
mbed_official 423:560d1a9f3083 274
mbed_official 423:560d1a9f3083 275 void gpio_irq_set(gpio_irq_t *obj, gpio_irq_event event, uint32_t enable)
mbed_official 423:560d1a9f3083 276 {
mbed_official 423:560d1a9f3083 277 uint32_t mode = STM_MODE_IT_EVT_RESET;
mbed_official 423:560d1a9f3083 278 uint32_t pull = GPIO_NOPULL;
mbed_official 423:560d1a9f3083 279
mbed_official 423:560d1a9f3083 280 if (enable) {
mbed_official 423:560d1a9f3083 281 if (event == IRQ_RISE) {
mbed_official 423:560d1a9f3083 282 if ((obj->event == EDGE_FALL) || (obj->event == EDGE_BOTH)) {
mbed_official 423:560d1a9f3083 283 mode = STM_MODE_IT_RISING_FALLING;
mbed_official 423:560d1a9f3083 284 obj->event = EDGE_BOTH;
mbed_official 423:560d1a9f3083 285 } else { // NONE or RISE
mbed_official 423:560d1a9f3083 286 mode = STM_MODE_IT_RISING;
mbed_official 423:560d1a9f3083 287 obj->event = EDGE_RISE;
mbed_official 423:560d1a9f3083 288 }
mbed_official 423:560d1a9f3083 289 }
mbed_official 423:560d1a9f3083 290 if (event == IRQ_FALL) {
mbed_official 423:560d1a9f3083 291 if ((obj->event == EDGE_RISE) || (obj->event == EDGE_BOTH)) {
mbed_official 423:560d1a9f3083 292 mode = STM_MODE_IT_RISING_FALLING;
mbed_official 423:560d1a9f3083 293 obj->event = EDGE_BOTH;
mbed_official 423:560d1a9f3083 294 } else { // NONE or FALL
mbed_official 423:560d1a9f3083 295 mode = STM_MODE_IT_FALLING;
mbed_official 423:560d1a9f3083 296 obj->event = EDGE_FALL;
mbed_official 423:560d1a9f3083 297 }
mbed_official 423:560d1a9f3083 298 }
mbed_official 423:560d1a9f3083 299 } else { // Disable
mbed_official 423:560d1a9f3083 300 if (event == IRQ_RISE) {
mbed_official 423:560d1a9f3083 301 if ((obj->event == EDGE_FALL) || (obj->event == EDGE_BOTH)) {
mbed_official 423:560d1a9f3083 302 mode = STM_MODE_IT_FALLING;
mbed_official 423:560d1a9f3083 303 obj->event = EDGE_FALL;
mbed_official 423:560d1a9f3083 304 } else { // NONE or RISE
mbed_official 423:560d1a9f3083 305 mode = STM_MODE_IT_EVT_RESET;
mbed_official 423:560d1a9f3083 306 obj->event = EDGE_NONE;
mbed_official 423:560d1a9f3083 307 }
mbed_official 423:560d1a9f3083 308 }
mbed_official 423:560d1a9f3083 309 if (event == IRQ_FALL) {
mbed_official 423:560d1a9f3083 310 if ((obj->event == EDGE_RISE) || (obj->event == EDGE_BOTH)) {
mbed_official 423:560d1a9f3083 311 mode = STM_MODE_IT_RISING;
mbed_official 423:560d1a9f3083 312 obj->event = EDGE_RISE;
mbed_official 423:560d1a9f3083 313 } else { // NONE or FALL
mbed_official 423:560d1a9f3083 314 mode = STM_MODE_IT_EVT_RESET;
mbed_official 423:560d1a9f3083 315 obj->event = EDGE_NONE;
mbed_official 423:560d1a9f3083 316 }
mbed_official 423:560d1a9f3083 317 }
mbed_official 423:560d1a9f3083 318 }
mbed_official 423:560d1a9f3083 319
mbed_official 423:560d1a9f3083 320 pin_function(obj->pin, STM_PIN_DATA(mode, pull, 0));
mbed_official 423:560d1a9f3083 321 }
mbed_official 423:560d1a9f3083 322
mbed_official 423:560d1a9f3083 323 void gpio_irq_enable(gpio_irq_t *obj)
mbed_official 423:560d1a9f3083 324 {
mbed_official 423:560d1a9f3083 325 NVIC_EnableIRQ(obj->irq_n);
mbed_official 423:560d1a9f3083 326 }
mbed_official 423:560d1a9f3083 327
mbed_official 423:560d1a9f3083 328 void gpio_irq_disable(gpio_irq_t *obj)
mbed_official 423:560d1a9f3083 329 {
mbed_official 423:560d1a9f3083 330 NVIC_DisableIRQ(obj->irq_n);
mbed_official 423:560d1a9f3083 331 obj->event = EDGE_NONE;
mbed_official 423:560d1a9f3083 332 }