Thomas Lyp / DevLibMemoryController

Initial commit

Dependencies:   FastPWM

mbed-dev-master/targets/TARGET_STM/gpio_irq_api.c@0:bb348c97df44, 2020-09-16 (annotated)

Committer:
lypinator
Date:
Wed Sep 16 01:11:49 2020 +0000
Revision:
0:bb348c97df44
Added PWM

Who changed what in which revision?

UserRevisionLine numberNew contents of line
lypinator 0:bb348c97df44 1 /* mbed Microcontroller Library
lypinator 0:bb348c97df44 2 *******************************************************************************
lypinator 0:bb348c97df44 3 * Copyright (c) 2014, STMicroelectronics
lypinator 0:bb348c97df44 4 * All rights reserved.
lypinator 0:bb348c97df44 5 *
lypinator 0:bb348c97df44 6 * Redistribution and use in source and binary forms, with or without
lypinator 0:bb348c97df44 7 * modification, are permitted provided that the following conditions are met:
lypinator 0:bb348c97df44 8 *
lypinator 0:bb348c97df44 9 * 1. Redistributions of source code must retain the above copyright notice,
lypinator 0:bb348c97df44 10 * this list of conditions and the following disclaimer.
lypinator 0:bb348c97df44 11 * 2. Redistributions in binary form must reproduce the above copyright notice,
lypinator 0:bb348c97df44 12 * this list of conditions and the following disclaimer in the documentation
lypinator 0:bb348c97df44 13 * and/or other materials provided with the distribution.
lypinator 0:bb348c97df44 14 * 3. Neither the name of STMicroelectronics nor the names of its contributors
lypinator 0:bb348c97df44 15 * may be used to endorse or promote products derived from this software
lypinator 0:bb348c97df44 16 * without specific prior written permission.
lypinator 0:bb348c97df44 17 *
lypinator 0:bb348c97df44 18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
lypinator 0:bb348c97df44 19 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
lypinator 0:bb348c97df44 20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
lypinator 0:bb348c97df44 21 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
lypinator 0:bb348c97df44 22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
lypinator 0:bb348c97df44 23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
lypinator 0:bb348c97df44 24 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
lypinator 0:bb348c97df44 25 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
lypinator 0:bb348c97df44 26 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
lypinator 0:bb348c97df44 27 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
lypinator 0:bb348c97df44 28 *******************************************************************************
lypinator 0:bb348c97df44 29 */
lypinator 0:bb348c97df44 30 #include <stddef.h>
lypinator 0:bb348c97df44 31 #include "cmsis.h"
lypinator 0:bb348c97df44 32 #include "gpio_irq_api.h"
lypinator 0:bb348c97df44 33 #include "pinmap.h"
lypinator 0:bb348c97df44 34 #include "mbed_error.h"
lypinator 0:bb348c97df44 35 #include "gpio_irq_device.h"
lypinator 0:bb348c97df44 36
lypinator 0:bb348c97df44 37 #define EDGE_NONE (0)
lypinator 0:bb348c97df44 38 #define EDGE_RISE (1)
lypinator 0:bb348c97df44 39 #define EDGE_FALL (2)
lypinator 0:bb348c97df44 40 #define EDGE_BOTH (3)
lypinator 0:bb348c97df44 41
lypinator 0:bb348c97df44 42
lypinator 0:bb348c97df44 43 typedef struct gpio_channel {
lypinator 0:bb348c97df44 44 uint32_t pin_mask; // bitmask representing which pins are configured for receiving interrupts
lypinator 0:bb348c97df44 45 uint32_t channel_ids[MAX_PIN_LINE]; // mbed "gpio_irq_t gpio_irq" field of instance
lypinator 0:bb348c97df44 46 GPIO_TypeDef *channel_gpio[MAX_PIN_LINE]; // base address of gpio port group
lypinator 0:bb348c97df44 47 uint32_t channel_pin[MAX_PIN_LINE]; // pin number in port group
lypinator 0:bb348c97df44 48 } gpio_channel_t;
lypinator 0:bb348c97df44 49
lypinator 0:bb348c97df44 50 static gpio_irq_handler irq_handler;
lypinator 0:bb348c97df44 51
lypinator 0:bb348c97df44 52 static gpio_channel_t channels[CHANNEL_NUM] = {
lypinator 0:bb348c97df44 53 #ifdef EXTI_IRQ0_NUM_LINES
lypinator 0:bb348c97df44 54 {.pin_mask = 0},
lypinator 0:bb348c97df44 55 #endif
lypinator 0:bb348c97df44 56 #ifdef EXTI_IRQ1_NUM_LINES
lypinator 0:bb348c97df44 57 {.pin_mask = 0},
lypinator 0:bb348c97df44 58 #endif
lypinator 0:bb348c97df44 59 #ifdef EXTI_IRQ2_NUM_LINES
lypinator 0:bb348c97df44 60 {.pin_mask = 0},
lypinator 0:bb348c97df44 61 #endif
lypinator 0:bb348c97df44 62 #ifdef EXTI_IRQ3_NUM_LINES
lypinator 0:bb348c97df44 63 {.pin_mask = 0},
lypinator 0:bb348c97df44 64 #endif
lypinator 0:bb348c97df44 65 #ifdef EXTI_IRQ4_NUM_LINES
lypinator 0:bb348c97df44 66 {.pin_mask = 0},
lypinator 0:bb348c97df44 67 #endif
lypinator 0:bb348c97df44 68 #ifdef EXTI_IRQ5_NUM_LINES
lypinator 0:bb348c97df44 69 {.pin_mask = 0},
lypinator 0:bb348c97df44 70 #endif
lypinator 0:bb348c97df44 71 #ifdef EXTI_IRQ6_NUM_LINES
lypinator 0:bb348c97df44 72 {.pin_mask = 0}
lypinator 0:bb348c97df44 73 #endif
lypinator 0:bb348c97df44 74 };
lypinator 0:bb348c97df44 75
lypinator 0:bb348c97df44 76 static void handle_interrupt_in(uint32_t irq_index, uint32_t max_num_pin_line)
lypinator 0:bb348c97df44 77 {
lypinator 0:bb348c97df44 78 gpio_channel_t *gpio_channel = &channels[irq_index];
lypinator 0:bb348c97df44 79 uint32_t gpio_idx;
lypinator 0:bb348c97df44 80
lypinator 0:bb348c97df44 81 for (gpio_idx = 0; gpio_idx < max_num_pin_line; gpio_idx++) {
lypinator 0:bb348c97df44 82 uint32_t current_mask = (1 << gpio_idx);
lypinator 0:bb348c97df44 83
lypinator 0:bb348c97df44 84 if (gpio_channel->pin_mask & current_mask) {
lypinator 0:bb348c97df44 85 // Retrieve the gpio and pin that generate the irq
lypinator 0:bb348c97df44 86 GPIO_TypeDef *gpio = (GPIO_TypeDef *)(gpio_channel->channel_gpio[gpio_idx]);
lypinator 0:bb348c97df44 87 uint32_t pin = (uint32_t)(1 << (gpio_channel->channel_pin[gpio_idx]));
lypinator 0:bb348c97df44 88
lypinator 0:bb348c97df44 89 // Clear interrupt flag
lypinator 0:bb348c97df44 90 if (__HAL_GPIO_EXTI_GET_FLAG(pin) != RESET) {
lypinator 0:bb348c97df44 91 __HAL_GPIO_EXTI_CLEAR_FLAG(pin);
lypinator 0:bb348c97df44 92
lypinator 0:bb348c97df44 93 if (gpio_channel->channel_ids[gpio_idx] == 0) {
lypinator 0:bb348c97df44 94 continue;
lypinator 0:bb348c97df44 95 }
lypinator 0:bb348c97df44 96
lypinator 0:bb348c97df44 97 // Trying to discern which edge caused the IRQ
lypinator 0:bb348c97df44 98 gpio_irq_event event = IRQ_NONE;
lypinator 0:bb348c97df44 99 if (LL_EXTI_IsEnabledFallingTrig_0_31(pin) && !LL_EXTI_IsEnabledRisingTrig_0_31(pin)) {
lypinator 0:bb348c97df44 100 // Only the fall handler is active, so this must be a falling edge
lypinator 0:bb348c97df44 101 event = IRQ_FALL;
lypinator 0:bb348c97df44 102 } else if (LL_EXTI_IsEnabledRisingTrig_0_31(pin) && !LL_EXTI_IsEnabledFallingTrig_0_31(pin)) {
lypinator 0:bb348c97df44 103 // Only the rise handler is active, so this must be a rising edge
lypinator 0:bb348c97df44 104 event = IRQ_RISE;
lypinator 0:bb348c97df44 105 } else {
lypinator 0:bb348c97df44 106 // Ambiguous as to which edge caused the IRQ
lypinator 0:bb348c97df44 107 //
lypinator 0:bb348c97df44 108 // The state of the pin could/should indicate which edge
lypinator 0:bb348c97df44 109 // has occurred but this can go wrong if the IRQ caused a
lypinator 0:bb348c97df44 110 // transition from a low power mode. In some circumstances
lypinator 0:bb348c97df44 111 // only the trailing edge callback will be called.
lypinator 0:bb348c97df44 112 if ((gpio->IDR & pin) == 0) {
lypinator 0:bb348c97df44 113 event = IRQ_FALL;
lypinator 0:bb348c97df44 114 } else {
lypinator 0:bb348c97df44 115 event = IRQ_RISE;
lypinator 0:bb348c97df44 116 }
lypinator 0:bb348c97df44 117 }
lypinator 0:bb348c97df44 118
lypinator 0:bb348c97df44 119 irq_handler(gpio_channel->channel_ids[gpio_idx], event);
lypinator 0:bb348c97df44 120
lypinator 0:bb348c97df44 121 return;
lypinator 0:bb348c97df44 122 }
lypinator 0:bb348c97df44 123 }
lypinator 0:bb348c97df44 124 }
lypinator 0:bb348c97df44 125 error("Unexpected Spurious interrupt, index %d\r\n", irq_index);
lypinator 0:bb348c97df44 126 }
lypinator 0:bb348c97df44 127
lypinator 0:bb348c97df44 128
lypinator 0:bb348c97df44 129 #ifdef EXTI_IRQ0_NUM_LINES
lypinator 0:bb348c97df44 130 // EXTI line 0
lypinator 0:bb348c97df44 131 static void gpio_irq0(void)
lypinator 0:bb348c97df44 132 {
lypinator 0:bb348c97df44 133 handle_interrupt_in(0, EXTI_IRQ0_NUM_LINES);
lypinator 0:bb348c97df44 134 }
lypinator 0:bb348c97df44 135 #endif
lypinator 0:bb348c97df44 136 #ifdef EXTI_IRQ1_NUM_LINES
lypinator 0:bb348c97df44 137 // EXTI line 1
lypinator 0:bb348c97df44 138 static void gpio_irq1(void)
lypinator 0:bb348c97df44 139 {
lypinator 0:bb348c97df44 140 handle_interrupt_in(1, EXTI_IRQ1_NUM_LINES);
lypinator 0:bb348c97df44 141 }
lypinator 0:bb348c97df44 142 #endif
lypinator 0:bb348c97df44 143 #ifdef EXTI_IRQ2_NUM_LINES
lypinator 0:bb348c97df44 144 // EXTI line 2
lypinator 0:bb348c97df44 145 static void gpio_irq2(void)
lypinator 0:bb348c97df44 146 {
lypinator 0:bb348c97df44 147 handle_interrupt_in(2, EXTI_IRQ2_NUM_LINES);
lypinator 0:bb348c97df44 148 }
lypinator 0:bb348c97df44 149 #endif
lypinator 0:bb348c97df44 150 #ifdef EXTI_IRQ3_NUM_LINES
lypinator 0:bb348c97df44 151 // EXTI line 3
lypinator 0:bb348c97df44 152 static void gpio_irq3(void)
lypinator 0:bb348c97df44 153 {
lypinator 0:bb348c97df44 154 handle_interrupt_in(3, EXTI_IRQ3_NUM_LINES);
lypinator 0:bb348c97df44 155 }
lypinator 0:bb348c97df44 156 #endif
lypinator 0:bb348c97df44 157 #ifdef EXTI_IRQ4_NUM_LINES
lypinator 0:bb348c97df44 158 // EXTI line 4
lypinator 0:bb348c97df44 159 static void gpio_irq4(void)
lypinator 0:bb348c97df44 160 {
lypinator 0:bb348c97df44 161 handle_interrupt_in(4, EXTI_IRQ4_NUM_LINES);
lypinator 0:bb348c97df44 162 }
lypinator 0:bb348c97df44 163 #endif
lypinator 0:bb348c97df44 164 #ifdef EXTI_IRQ5_NUM_LINES
lypinator 0:bb348c97df44 165 // EXTI lines 5 to 9
lypinator 0:bb348c97df44 166 static void gpio_irq5(void)
lypinator 0:bb348c97df44 167 {
lypinator 0:bb348c97df44 168 handle_interrupt_in(5, EXTI_IRQ5_NUM_LINES);
lypinator 0:bb348c97df44 169 }
lypinator 0:bb348c97df44 170 #endif
lypinator 0:bb348c97df44 171 #ifdef EXTI_IRQ6_NUM_LINES
lypinator 0:bb348c97df44 172 // EXTI lines 10 to 15
lypinator 0:bb348c97df44 173 static void gpio_irq6(void)
lypinator 0:bb348c97df44 174 {
lypinator 0:bb348c97df44 175 handle_interrupt_in(6, EXTI_IRQ6_NUM_LINES);
lypinator 0:bb348c97df44 176 }
lypinator 0:bb348c97df44 177 #endif
lypinator 0:bb348c97df44 178
lypinator 0:bb348c97df44 179 extern GPIO_TypeDef *Set_GPIO_Clock(uint32_t port_idx);
lypinator 0:bb348c97df44 180 extern void pin_function_gpiomode(PinName pin, uint32_t gpiomode);
lypinator 0:bb348c97df44 181
lypinator 0:bb348c97df44 182 int gpio_irq_init(gpio_irq_t *obj, PinName pin, gpio_irq_handler handler, uint32_t id)
lypinator 0:bb348c97df44 183 {
lypinator 0:bb348c97df44 184 uint32_t vector = 0;
lypinator 0:bb348c97df44 185 uint32_t irq_index;
lypinator 0:bb348c97df44 186 gpio_channel_t *gpio_channel;
lypinator 0:bb348c97df44 187 uint32_t gpio_idx;
lypinator 0:bb348c97df44 188
lypinator 0:bb348c97df44 189 if (pin == NC) {
lypinator 0:bb348c97df44 190 return -1;
lypinator 0:bb348c97df44 191 }
lypinator 0:bb348c97df44 192
lypinator 0:bb348c97df44 193 /* Enable SYSCFG Clock */
lypinator 0:bb348c97df44 194 __HAL_RCC_SYSCFG_CLK_ENABLE();
lypinator 0:bb348c97df44 195
lypinator 0:bb348c97df44 196 uint32_t port_index = STM_PORT(pin);
lypinator 0:bb348c97df44 197 uint32_t pin_index = STM_PIN(pin);
lypinator 0:bb348c97df44 198 irq_index = pin_lines_desc[pin_index].irq_index;
lypinator 0:bb348c97df44 199
lypinator 0:bb348c97df44 200 switch (irq_index) {
lypinator 0:bb348c97df44 201 #ifdef EXTI_IRQ0_NUM_LINES
lypinator 0:bb348c97df44 202 case 0:
lypinator 0:bb348c97df44 203 vector = (uint32_t)&gpio_irq0;
lypinator 0:bb348c97df44 204 break;
lypinator 0:bb348c97df44 205 #endif
lypinator 0:bb348c97df44 206 #ifdef EXTI_IRQ1_NUM_LINES
lypinator 0:bb348c97df44 207 case 1:
lypinator 0:bb348c97df44 208 vector = (uint32_t)&gpio_irq1;
lypinator 0:bb348c97df44 209 break;
lypinator 0:bb348c97df44 210 #endif
lypinator 0:bb348c97df44 211 #ifdef EXTI_IRQ2_NUM_LINES
lypinator 0:bb348c97df44 212 case 2:
lypinator 0:bb348c97df44 213 vector = (uint32_t)&gpio_irq2;
lypinator 0:bb348c97df44 214 break;
lypinator 0:bb348c97df44 215 #endif
lypinator 0:bb348c97df44 216 #ifdef EXTI_IRQ3_NUM_LINES
lypinator 0:bb348c97df44 217 case 3:
lypinator 0:bb348c97df44 218 vector = (uint32_t)&gpio_irq3;
lypinator 0:bb348c97df44 219 break;
lypinator 0:bb348c97df44 220 #endif
lypinator 0:bb348c97df44 221 #ifdef EXTI_IRQ4_NUM_LINES
lypinator 0:bb348c97df44 222 case 4:
lypinator 0:bb348c97df44 223 vector = (uint32_t)&gpio_irq4;
lypinator 0:bb348c97df44 224 break;
lypinator 0:bb348c97df44 225 #endif
lypinator 0:bb348c97df44 226 #ifdef EXTI_IRQ5_NUM_LINES
lypinator 0:bb348c97df44 227 case 5:
lypinator 0:bb348c97df44 228 vector = (uint32_t)&gpio_irq5;
lypinator 0:bb348c97df44 229 break;
lypinator 0:bb348c97df44 230 #endif
lypinator 0:bb348c97df44 231 #ifdef EXTI_IRQ6_NUM_LINES
lypinator 0:bb348c97df44 232 case 6:
lypinator 0:bb348c97df44 233 vector = (uint32_t)&gpio_irq6;
lypinator 0:bb348c97df44 234 break;
lypinator 0:bb348c97df44 235 #endif
lypinator 0:bb348c97df44 236 default:
lypinator 0:bb348c97df44 237 error("InterruptIn error: pin not supported.\n");
lypinator 0:bb348c97df44 238 return -1;
lypinator 0:bb348c97df44 239 }
lypinator 0:bb348c97df44 240
lypinator 0:bb348c97df44 241 // Enable GPIO clock
lypinator 0:bb348c97df44 242 GPIO_TypeDef *gpio_add = Set_GPIO_Clock(port_index);
lypinator 0:bb348c97df44 243
lypinator 0:bb348c97df44 244 // Save informations for future use
lypinator 0:bb348c97df44 245 obj->irq_n = pin_lines_desc[pin_index].irq_n;
lypinator 0:bb348c97df44 246 obj->irq_index = pin_lines_desc[pin_index].irq_index;
lypinator 0:bb348c97df44 247 obj->event = EDGE_NONE;
lypinator 0:bb348c97df44 248 obj->pin = pin;
lypinator 0:bb348c97df44 249
lypinator 0:bb348c97df44 250 gpio_channel = &channels[irq_index];
lypinator 0:bb348c97df44 251 gpio_idx = pin_lines_desc[pin_index].gpio_idx;
lypinator 0:bb348c97df44 252 gpio_channel->pin_mask |= (1 << gpio_idx);
lypinator 0:bb348c97df44 253 gpio_channel->channel_ids[gpio_idx] = id;
lypinator 0:bb348c97df44 254 gpio_channel->channel_gpio[gpio_idx] = gpio_add;
lypinator 0:bb348c97df44 255 gpio_channel->channel_pin[gpio_idx] = pin_index;
lypinator 0:bb348c97df44 256
lypinator 0:bb348c97df44 257 irq_handler = handler;
lypinator 0:bb348c97df44 258
lypinator 0:bb348c97df44 259 // Enable EXTI interrupt
lypinator 0:bb348c97df44 260 NVIC_SetVector(obj->irq_n, vector);
lypinator 0:bb348c97df44 261 gpio_irq_enable(obj);
lypinator 0:bb348c97df44 262
lypinator 0:bb348c97df44 263 return 0;
lypinator 0:bb348c97df44 264 }
lypinator 0:bb348c97df44 265
lypinator 0:bb348c97df44 266 void gpio_irq_free(gpio_irq_t *obj)
lypinator 0:bb348c97df44 267 {
lypinator 0:bb348c97df44 268 uint32_t gpio_idx = pin_lines_desc[STM_PIN(obj->pin)].gpio_idx;
lypinator 0:bb348c97df44 269 gpio_channel_t *gpio_channel = &channels[obj->irq_index];
lypinator 0:bb348c97df44 270
lypinator 0:bb348c97df44 271 gpio_irq_disable(obj);
lypinator 0:bb348c97df44 272 gpio_channel->pin_mask &= ~(1 << gpio_idx);
lypinator 0:bb348c97df44 273 gpio_channel->channel_ids[gpio_idx] = 0;
lypinator 0:bb348c97df44 274 gpio_channel->channel_gpio[gpio_idx] = 0;
lypinator 0:bb348c97df44 275 gpio_channel->channel_pin[gpio_idx] = 0;
lypinator 0:bb348c97df44 276 }
lypinator 0:bb348c97df44 277
lypinator 0:bb348c97df44 278 void gpio_irq_set(gpio_irq_t *obj, gpio_irq_event event, uint32_t enable)
lypinator 0:bb348c97df44 279 {
lypinator 0:bb348c97df44 280 /* Enable / Disable Edge triggered interrupt and store event */
lypinator 0:bb348c97df44 281 if (event == IRQ_RISE) {
lypinator 0:bb348c97df44 282 if (enable) {
lypinator 0:bb348c97df44 283 LL_EXTI_EnableRisingTrig_0_31(1 << STM_PIN(obj->pin));
lypinator 0:bb348c97df44 284 obj->event |= IRQ_RISE;
lypinator 0:bb348c97df44 285 } else {
lypinator 0:bb348c97df44 286 LL_EXTI_DisableRisingTrig_0_31(1 << STM_PIN(obj->pin));
lypinator 0:bb348c97df44 287 obj->event &= ~IRQ_RISE;
lypinator 0:bb348c97df44 288 }
lypinator 0:bb348c97df44 289 }
lypinator 0:bb348c97df44 290 if (event == IRQ_FALL) {
lypinator 0:bb348c97df44 291 if (enable) {
lypinator 0:bb348c97df44 292 LL_EXTI_EnableFallingTrig_0_31(1 << STM_PIN(obj->pin));
lypinator 0:bb348c97df44 293 obj->event |= IRQ_FALL;
lypinator 0:bb348c97df44 294 } else {
lypinator 0:bb348c97df44 295 LL_EXTI_DisableFallingTrig_0_31(1 << STM_PIN(obj->pin));
lypinator 0:bb348c97df44 296 obj->event &= ~IRQ_FALL;
lypinator 0:bb348c97df44 297 }
lypinator 0:bb348c97df44 298 }
lypinator 0:bb348c97df44 299 }
lypinator 0:bb348c97df44 300
lypinator 0:bb348c97df44 301 void gpio_irq_enable(gpio_irq_t *obj)
lypinator 0:bb348c97df44 302 {
lypinator 0:bb348c97df44 303 uint32_t temp = 0;
lypinator 0:bb348c97df44 304 uint32_t port_index = STM_PORT(obj->pin);
lypinator 0:bb348c97df44 305 uint32_t pin_index = STM_PIN(obj->pin);
lypinator 0:bb348c97df44 306
lypinator 0:bb348c97df44 307 /* Select Source */
lypinator 0:bb348c97df44 308 temp = SYSCFG->EXTICR[pin_index >> 2];
lypinator 0:bb348c97df44 309 CLEAR_BIT(temp, (0x0FU) << (4U * (pin_index & 0x03U)));
lypinator 0:bb348c97df44 310 SET_BIT(temp, port_index << (4U * (pin_index & 0x03U)));
lypinator 0:bb348c97df44 311 SYSCFG->EXTICR[pin_index >> 2] = temp;
lypinator 0:bb348c97df44 312
lypinator 0:bb348c97df44 313 LL_EXTI_EnableIT_0_31(1 << pin_index);
lypinator 0:bb348c97df44 314
lypinator 0:bb348c97df44 315 /* Restore previous edge interrupt configuration if applicable */
lypinator 0:bb348c97df44 316 if (obj->event & IRQ_RISE) {
lypinator 0:bb348c97df44 317 LL_EXTI_EnableRisingTrig_0_31(1 << STM_PIN(obj->pin));
lypinator 0:bb348c97df44 318 }
lypinator 0:bb348c97df44 319 if (obj->event & IRQ_FALL) {
lypinator 0:bb348c97df44 320 LL_EXTI_EnableFallingTrig_0_31(1 << STM_PIN(obj->pin));
lypinator 0:bb348c97df44 321 }
lypinator 0:bb348c97df44 322
lypinator 0:bb348c97df44 323 NVIC_EnableIRQ(obj->irq_n);
lypinator 0:bb348c97df44 324 }
lypinator 0:bb348c97df44 325
lypinator 0:bb348c97df44 326 void gpio_irq_disable(gpio_irq_t *obj)
lypinator 0:bb348c97df44 327 {
lypinator 0:bb348c97df44 328 /* Clear EXTI line configuration */
lypinator 0:bb348c97df44 329 LL_EXTI_DisableRisingTrig_0_31(1 << STM_PIN(obj->pin));
lypinator 0:bb348c97df44 330 LL_EXTI_DisableFallingTrig_0_31(1 << STM_PIN(obj->pin));
lypinator 0:bb348c97df44 331 LL_EXTI_DisableIT_0_31(1 << STM_PIN(obj->pin));
lypinator 0:bb348c97df44 332 NVIC_DisableIRQ(obj->irq_n);
lypinator 0:bb348c97df44 333 NVIC_ClearPendingIRQ(obj->irq_n);
lypinator 0:bb348c97df44 334 }