shao ziyang / mbed-src-kl05

mbed library sources

Dependents:   frdm_kl05z_gpio_test

Fork of mbed-src by mbed official

targets/hal/TARGET_STM/TARGET_NUCLEO_F334R8/gpio_irq_api.c@250:a49055e7a707, 2014-07-08 (annotated)

Committer:
mbed_official
Date:
Tue Jul 08 11:15:08 2014 +0100
Revision:
250:a49055e7a707
Parent:
237:f3da66175598
Child:
251:de9a1e4ffd79
Synchronized with git revision 3197042b65f8d28e856e1a7812d45e2fbe80e3f1



Full URL: https://github.com/mbedmicro/mbed/commit/3197042b65f8d28e856e1a7812d45e2fbe80e3f1/



error.h -> mbed_error.h

Who changed what in which revision?

UserRevisionLine numberNew contents of line
mbed_official 237:f3da66175598 1 /* mbed Microcontroller Library
mbed_official 237:f3da66175598 2 *******************************************************************************
mbed_official 237:f3da66175598 3 * Copyright (c) 2014, STMicroelectronics
mbed_official 237:f3da66175598 4 * All rights reserved.
mbed_official 237:f3da66175598 5 *
mbed_official 237:f3da66175598 6 * Redistribution and use in source and binary forms, with or without
mbed_official 237:f3da66175598 7 * modification, are permitted provided that the following conditions are met:
mbed_official 237:f3da66175598 8 *
mbed_official 237:f3da66175598 9 * 1. Redistributions of source code must retain the above copyright notice,
mbed_official 237:f3da66175598 10 * this list of conditions and the following disclaimer.
mbed_official 237:f3da66175598 11 * 2. Redistributions in binary form must reproduce the above copyright notice,
mbed_official 237:f3da66175598 12 * this list of conditions and the following disclaimer in the documentation
mbed_official 237:f3da66175598 13 * and/or other materials provided with the distribution.
mbed_official 237:f3da66175598 14 * 3. Neither the name of STMicroelectronics nor the names of its contributors
mbed_official 237:f3da66175598 15 * may be used to endorse or promote products derived from this software
mbed_official 237:f3da66175598 16 * without specific prior written permission.
mbed_official 237:f3da66175598 17 *
mbed_official 237:f3da66175598 18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
mbed_official 237:f3da66175598 19 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
mbed_official 237:f3da66175598 20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
mbed_official 237:f3da66175598 21 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
mbed_official 237:f3da66175598 22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
mbed_official 237:f3da66175598 23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
mbed_official 237:f3da66175598 24 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
mbed_official 237:f3da66175598 25 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
mbed_official 237:f3da66175598 26 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
mbed_official 237:f3da66175598 27 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
mbed_official 237:f3da66175598 28 *******************************************************************************
mbed_official 237:f3da66175598 29 */
mbed_official 237:f3da66175598 30 #include <stddef.h>
mbed_official 237:f3da66175598 31 #include "cmsis.h"
mbed_official 237:f3da66175598 32 #include "gpio_irq_api.h"
mbed_official 237:f3da66175598 33 #include "pinmap.h"
mbed_official 250:a49055e7a707 34 #include "mbed_error.h"
mbed_official 237:f3da66175598 35
mbed_official 237:f3da66175598 36 #define EDGE_NONE (0)
mbed_official 237:f3da66175598 37 #define EDGE_RISE (1)
mbed_official 237:f3da66175598 38 #define EDGE_FALL (2)
mbed_official 237:f3da66175598 39 #define EDGE_BOTH (3)
mbed_official 237:f3da66175598 40
mbed_official 237:f3da66175598 41 #define CHANNEL_NUM (7)
mbed_official 237:f3da66175598 42
mbed_official 237:f3da66175598 43 static uint32_t channel_ids[CHANNEL_NUM] = {0, 0, 0, 0, 0, 0, 0};
mbed_official 237:f3da66175598 44 static uint32_t channel_gpio[CHANNEL_NUM] = {0, 0, 0, 0, 0, 0, 0};
mbed_official 237:f3da66175598 45 static uint32_t channel_pin[CHANNEL_NUM] = {0, 0, 0, 0, 0, 0, 0};
mbed_official 237:f3da66175598 46
mbed_official 237:f3da66175598 47 static gpio_irq_handler irq_handler;
mbed_official 237:f3da66175598 48
mbed_official 237:f3da66175598 49 static void handle_interrupt_in(uint32_t irq_index)
mbed_official 237:f3da66175598 50 {
mbed_official 237:f3da66175598 51 // Retrieve the gpio and pin that generate the irq
mbed_official 237:f3da66175598 52 GPIO_TypeDef *gpio = (GPIO_TypeDef *)(channel_gpio[irq_index]);
mbed_official 237:f3da66175598 53 uint32_t pin = (uint32_t)(1 << channel_pin[irq_index]);
mbed_official 237:f3da66175598 54
mbed_official 237:f3da66175598 55 // Clear interrupt flag
mbed_official 237:f3da66175598 56 if (__HAL_GPIO_EXTI_GET_FLAG(pin) != RESET) {
mbed_official 237:f3da66175598 57 __HAL_GPIO_EXTI_CLEAR_FLAG(pin);
mbed_official 237:f3da66175598 58 }
mbed_official 237:f3da66175598 59
mbed_official 237:f3da66175598 60 if (channel_ids[irq_index] == 0) return;
mbed_official 237:f3da66175598 61
mbed_official 237:f3da66175598 62 // Check which edge has generated the irq
mbed_official 237:f3da66175598 63 if ((gpio->IDR & pin) == 0) {
mbed_official 237:f3da66175598 64 irq_handler(channel_ids[irq_index], IRQ_FALL);
mbed_official 237:f3da66175598 65 } else {
mbed_official 237:f3da66175598 66 irq_handler(channel_ids[irq_index], IRQ_RISE);
mbed_official 237:f3da66175598 67 }
mbed_official 237:f3da66175598 68 }
mbed_official 237:f3da66175598 69
mbed_official 237:f3da66175598 70 // The irq_index is passed to the function
mbed_official 237:f3da66175598 71 // EXTI line 0
mbed_official 237:f3da66175598 72 static void gpio_irq0(void)
mbed_official 237:f3da66175598 73 {
mbed_official 237:f3da66175598 74 handle_interrupt_in(0);
mbed_official 237:f3da66175598 75 }
mbed_official 237:f3da66175598 76 // EXTI line 1
mbed_official 237:f3da66175598 77 static void gpio_irq1(void)
mbed_official 237:f3da66175598 78 {
mbed_official 237:f3da66175598 79 handle_interrupt_in(1);
mbed_official 237:f3da66175598 80 }
mbed_official 237:f3da66175598 81 // EXTI line 2
mbed_official 237:f3da66175598 82 static void gpio_irq2(void)
mbed_official 237:f3da66175598 83 {
mbed_official 237:f3da66175598 84 handle_interrupt_in(2);
mbed_official 237:f3da66175598 85 }
mbed_official 237:f3da66175598 86 // EXTI line 3
mbed_official 237:f3da66175598 87 static void gpio_irq3(void)
mbed_official 237:f3da66175598 88 {
mbed_official 237:f3da66175598 89 handle_interrupt_in(3);
mbed_official 237:f3da66175598 90 }
mbed_official 237:f3da66175598 91 // EXTI line 4
mbed_official 237:f3da66175598 92 static void gpio_irq4(void)
mbed_official 237:f3da66175598 93 {
mbed_official 237:f3da66175598 94 handle_interrupt_in(4);
mbed_official 237:f3da66175598 95 }
mbed_official 237:f3da66175598 96 // EXTI lines 5 to 9
mbed_official 237:f3da66175598 97 static void gpio_irq5(void)
mbed_official 237:f3da66175598 98 {
mbed_official 237:f3da66175598 99 handle_interrupt_in(5);
mbed_official 237:f3da66175598 100 }
mbed_official 237:f3da66175598 101 // EXTI lines 10 to 15
mbed_official 237:f3da66175598 102 static void gpio_irq6(void)
mbed_official 237:f3da66175598 103 {
mbed_official 237:f3da66175598 104 handle_interrupt_in(6);
mbed_official 237:f3da66175598 105 }
mbed_official 237:f3da66175598 106
mbed_official 237:f3da66175598 107 extern uint32_t Set_GPIO_Clock(uint32_t port_idx);
mbed_official 237:f3da66175598 108
mbed_official 237:f3da66175598 109 int gpio_irq_init(gpio_irq_t *obj, PinName pin, gpio_irq_handler handler, uint32_t id)
mbed_official 237:f3da66175598 110 {
mbed_official 237:f3da66175598 111 IRQn_Type irq_n = (IRQn_Type)0;
mbed_official 237:f3da66175598 112 uint32_t vector = 0;
mbed_official 237:f3da66175598 113 uint32_t irq_index;
mbed_official 237:f3da66175598 114
mbed_official 237:f3da66175598 115 if (pin == NC) return -1;
mbed_official 237:f3da66175598 116
mbed_official 237:f3da66175598 117 uint32_t port_index = STM_PORT(pin);
mbed_official 237:f3da66175598 118 uint32_t pin_index = STM_PIN(pin);
mbed_official 237:f3da66175598 119
mbed_official 237:f3da66175598 120 // Select irq number and interrupt routine
mbed_official 237:f3da66175598 121 switch (pin_index) {
mbed_official 237:f3da66175598 122 case 0:
mbed_official 237:f3da66175598 123 irq_n = EXTI0_IRQn;
mbed_official 237:f3da66175598 124 vector = (uint32_t)&gpio_irq0;
mbed_official 237:f3da66175598 125 irq_index = 0;
mbed_official 237:f3da66175598 126 break;
mbed_official 237:f3da66175598 127 case 1:
mbed_official 237:f3da66175598 128 irq_n = EXTI1_IRQn;
mbed_official 237:f3da66175598 129 vector = (uint32_t)&gpio_irq1;
mbed_official 237:f3da66175598 130 irq_index = 1;
mbed_official 237:f3da66175598 131 break;
mbed_official 237:f3da66175598 132 case 2:
mbed_official 237:f3da66175598 133 irq_n = EXTI2_TSC_IRQn;
mbed_official 237:f3da66175598 134 vector = (uint32_t)&gpio_irq2;
mbed_official 237:f3da66175598 135 irq_index = 2;
mbed_official 237:f3da66175598 136 break;
mbed_official 237:f3da66175598 137 case 3:
mbed_official 237:f3da66175598 138 irq_n = EXTI3_IRQn;
mbed_official 237:f3da66175598 139 vector = (uint32_t)&gpio_irq3;
mbed_official 237:f3da66175598 140 irq_index = 3;
mbed_official 237:f3da66175598 141 break;
mbed_official 237:f3da66175598 142 case 4:
mbed_official 237:f3da66175598 143 irq_n = EXTI4_IRQn;
mbed_official 237:f3da66175598 144 vector = (uint32_t)&gpio_irq4;
mbed_official 237:f3da66175598 145 irq_index = 4;
mbed_official 237:f3da66175598 146 break;
mbed_official 237:f3da66175598 147 case 5:
mbed_official 237:f3da66175598 148 case 6:
mbed_official 237:f3da66175598 149 case 7:
mbed_official 237:f3da66175598 150 case 8:
mbed_official 237:f3da66175598 151 case 9:
mbed_official 237:f3da66175598 152 irq_n = EXTI9_5_IRQn;
mbed_official 237:f3da66175598 153 vector = (uint32_t)&gpio_irq5;
mbed_official 237:f3da66175598 154 irq_index = 5;
mbed_official 237:f3da66175598 155 break;
mbed_official 237:f3da66175598 156 case 10:
mbed_official 237:f3da66175598 157 case 11:
mbed_official 237:f3da66175598 158 case 12:
mbed_official 237:f3da66175598 159 case 13:
mbed_official 237:f3da66175598 160 case 14:
mbed_official 237:f3da66175598 161 case 15:
mbed_official 237:f3da66175598 162 irq_n = EXTI15_10_IRQn;
mbed_official 237:f3da66175598 163 vector = (uint32_t)&gpio_irq6;
mbed_official 237:f3da66175598 164 irq_index = 6;
mbed_official 237:f3da66175598 165 break;
mbed_official 237:f3da66175598 166 default:
mbed_official 237:f3da66175598 167 error("InterruptIn error: pin not supported.\n");
mbed_official 237:f3da66175598 168 return -1;
mbed_official 237:f3da66175598 169 }
mbed_official 237:f3da66175598 170
mbed_official 237:f3da66175598 171 // Enable GPIO clock
mbed_official 237:f3da66175598 172 uint32_t gpio_add = Set_GPIO_Clock(port_index);
mbed_official 237:f3da66175598 173
mbed_official 237:f3da66175598 174 // Configure GPIO
mbed_official 237:f3da66175598 175 pin_function(pin, STM_PIN_DATA(STM_MODE_IT_FALLING, GPIO_NOPULL, 0));
mbed_official 237:f3da66175598 176
mbed_official 237:f3da66175598 177 // Enable EXTI interrupt
mbed_official 237:f3da66175598 178 NVIC_SetVector(irq_n, vector);
mbed_official 237:f3da66175598 179 NVIC_EnableIRQ(irq_n);
mbed_official 237:f3da66175598 180
mbed_official 237:f3da66175598 181 // Save informations for future use
mbed_official 237:f3da66175598 182 obj->irq_n = irq_n;
mbed_official 237:f3da66175598 183 obj->irq_index = irq_index;
mbed_official 237:f3da66175598 184 obj->event = EDGE_NONE;
mbed_official 237:f3da66175598 185 obj->pin = pin;
mbed_official 237:f3da66175598 186 channel_ids[irq_index] = id;
mbed_official 237:f3da66175598 187 channel_gpio[irq_index] = gpio_add;
mbed_official 237:f3da66175598 188 channel_pin[irq_index] = pin_index;
mbed_official 237:f3da66175598 189
mbed_official 237:f3da66175598 190 irq_handler = handler;
mbed_official 237:f3da66175598 191
mbed_official 237:f3da66175598 192 return 0;
mbed_official 237:f3da66175598 193 }
mbed_official 237:f3da66175598 194
mbed_official 237:f3da66175598 195 void gpio_irq_free(gpio_irq_t *obj)
mbed_official 237:f3da66175598 196 {
mbed_official 237:f3da66175598 197 channel_ids[obj->irq_index] = 0;
mbed_official 237:f3da66175598 198 channel_gpio[obj->irq_index] = 0;
mbed_official 237:f3da66175598 199 channel_pin[obj->irq_index] = 0;
mbed_official 237:f3da66175598 200 // Disable EXTI line
mbed_official 237:f3da66175598 201 pin_function(obj->pin, STM_PIN_DATA(STM_MODE_INPUT, GPIO_NOPULL, 0));
mbed_official 237:f3da66175598 202 obj->event = EDGE_NONE;
mbed_official 237:f3da66175598 203 }
mbed_official 237:f3da66175598 204
mbed_official 237:f3da66175598 205 void gpio_irq_set(gpio_irq_t *obj, gpio_irq_event event, uint32_t enable)
mbed_official 237:f3da66175598 206 {
mbed_official 237:f3da66175598 207 uint32_t mode = STM_MODE_INPUT;
mbed_official 237:f3da66175598 208 uint32_t pull = GPIO_NOPULL;
mbed_official 237:f3da66175598 209
mbed_official 237:f3da66175598 210 if (enable) {
mbed_official 237:f3da66175598 211
mbed_official 237:f3da66175598 212 pull = GPIO_NOPULL;
mbed_official 237:f3da66175598 213
mbed_official 237:f3da66175598 214 if (event == IRQ_RISE) {
mbed_official 237:f3da66175598 215 if ((obj->event == EDGE_FALL) || (obj->event == EDGE_BOTH)) {
mbed_official 237:f3da66175598 216 mode = STM_MODE_IT_RISING_FALLING;
mbed_official 237:f3da66175598 217 obj->event = EDGE_BOTH;
mbed_official 237:f3da66175598 218 } else { // NONE or RISE
mbed_official 237:f3da66175598 219 mode = STM_MODE_IT_RISING;
mbed_official 237:f3da66175598 220 obj->event = EDGE_RISE;
mbed_official 237:f3da66175598 221 }
mbed_official 237:f3da66175598 222 }
mbed_official 237:f3da66175598 223
mbed_official 237:f3da66175598 224 if (event == IRQ_FALL) {
mbed_official 237:f3da66175598 225 if ((obj->event == EDGE_RISE) || (obj->event == EDGE_BOTH)) {
mbed_official 237:f3da66175598 226 mode = STM_MODE_IT_RISING_FALLING;
mbed_official 237:f3da66175598 227 obj->event = EDGE_BOTH;
mbed_official 237:f3da66175598 228 } else { // NONE or FALL
mbed_official 237:f3da66175598 229 mode = STM_MODE_IT_FALLING;
mbed_official 237:f3da66175598 230 obj->event = EDGE_FALL;
mbed_official 237:f3da66175598 231 }
mbed_official 237:f3da66175598 232 }
mbed_official 237:f3da66175598 233 } else {
mbed_official 237:f3da66175598 234 mode = STM_MODE_INPUT;
mbed_official 237:f3da66175598 235 pull = GPIO_NOPULL;
mbed_official 237:f3da66175598 236 obj->event = EDGE_NONE;
mbed_official 237:f3da66175598 237 }
mbed_official 237:f3da66175598 238
mbed_official 237:f3da66175598 239 pin_function(obj->pin, STM_PIN_DATA(mode, pull, 0));
mbed_official 237:f3da66175598 240 }
mbed_official 237:f3da66175598 241
mbed_official 237:f3da66175598 242 void gpio_irq_enable(gpio_irq_t *obj)
mbed_official 237:f3da66175598 243 {
mbed_official 237:f3da66175598 244 NVIC_EnableIRQ(obj->irq_n);
mbed_official 237:f3da66175598 245 }
mbed_official 237:f3da66175598 246
mbed_official 237:f3da66175598 247 void gpio_irq_disable(gpio_irq_t *obj)
mbed_official 237:f3da66175598 248 {
mbed_official 237:f3da66175598 249 NVIC_DisableIRQ(obj->irq_n);
mbed_official 237:f3da66175598 250 obj->event = EDGE_NONE;
mbed_official 237:f3da66175598 251 }