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_F401RE/gpio_irq_api.c@87:085cde657901, 2014-02-08 (annotated)

Committer:
mbed_official
Date:
Sat Feb 08 19:45:06 2014 +0000
Revision:
87:085cde657901
Child:
125:23cc3068a9e4
Synchronized with git revision 9272cdeb45ec7e6077641536509413da8fd2ebc2



Full URL: https://github.com/mbedmicro/mbed/commit/9272cdeb45ec7e6077641536509413da8fd2ebc2/



Add NUCLEO_F401RE, improvements

Who changed what in which revision?

UserRevisionLine numberNew contents of line
mbed_official 87:085cde657901 1 /* mbed Microcontroller Library
mbed_official 87:085cde657901 2 *******************************************************************************
mbed_official 87:085cde657901 3 * Copyright (c) 2014, STMicroelectronics
mbed_official 87:085cde657901 4 * All rights reserved.
mbed_official 87:085cde657901 5 *
mbed_official 87:085cde657901 6 * Redistribution and use in source and binary forms, with or without
mbed_official 87:085cde657901 7 * modification, are permitted provided that the following conditions are met:
mbed_official 87:085cde657901 8 *
mbed_official 87:085cde657901 9 * 1. Redistributions of source code must retain the above copyright notice,
mbed_official 87:085cde657901 10 * this list of conditions and the following disclaimer.
mbed_official 87:085cde657901 11 * 2. Redistributions in binary form must reproduce the above copyright notice,
mbed_official 87:085cde657901 12 * this list of conditions and the following disclaimer in the documentation
mbed_official 87:085cde657901 13 * and/or other materials provided with the distribution.
mbed_official 87:085cde657901 14 * 3. Neither the name of STMicroelectronics nor the names of its contributors
mbed_official 87:085cde657901 15 * may be used to endorse or promote products derived from this software
mbed_official 87:085cde657901 16 * without specific prior written permission.
mbed_official 87:085cde657901 17 *
mbed_official 87:085cde657901 18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
mbed_official 87:085cde657901 19 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
mbed_official 87:085cde657901 20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
mbed_official 87:085cde657901 21 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
mbed_official 87:085cde657901 22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
mbed_official 87:085cde657901 23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
mbed_official 87:085cde657901 24 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
mbed_official 87:085cde657901 25 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
mbed_official 87:085cde657901 26 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
mbed_official 87:085cde657901 27 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
mbed_official 87:085cde657901 28 *******************************************************************************
mbed_official 87:085cde657901 29 */
mbed_official 87:085cde657901 30 #include <stddef.h>
mbed_official 87:085cde657901 31 #include "cmsis.h"
mbed_official 87:085cde657901 32
mbed_official 87:085cde657901 33 #include "gpio_irq_api.h"
mbed_official 87:085cde657901 34 #include "pinmap.h"
mbed_official 87:085cde657901 35 #include "stm32f4xx_hal.h"
mbed_official 87:085cde657901 36 #include "error.h"
mbed_official 87:085cde657901 37
mbed_official 87:085cde657901 38 #define EDGE_NONE (0)
mbed_official 87:085cde657901 39 #define EDGE_RISE (1)
mbed_official 87:085cde657901 40 #define EDGE_FALL (2)
mbed_official 87:085cde657901 41 #define EDGE_BOTH (3)
mbed_official 87:085cde657901 42
mbed_official 87:085cde657901 43 #define CHANNEL_NUM (4)
mbed_official 87:085cde657901 44
mbed_official 87:085cde657901 45 static uint32_t channel_ids[CHANNEL_NUM] = {0, 0, 0, 0};
mbed_official 87:085cde657901 46 static uint32_t channel_gpio[CHANNEL_NUM] = {0, 0, 0, 0};
mbed_official 87:085cde657901 47 static uint32_t channel_pin[CHANNEL_NUM] = {0, 0, 0, 0};
mbed_official 87:085cde657901 48
mbed_official 87:085cde657901 49 static gpio_irq_handler irq_handler;
mbed_official 87:085cde657901 50
mbed_official 87:085cde657901 51 static void handle_interrupt_in(uint32_t irq_index) {
mbed_official 87:085cde657901 52 // Retrieve the gpio and pin that generate the irq
mbed_official 87:085cde657901 53 GPIO_TypeDef *gpio = (GPIO_TypeDef *)(channel_gpio[irq_index]);
mbed_official 87:085cde657901 54 uint32_t pin = (uint32_t)(1 << channel_pin[irq_index]);
mbed_official 87:085cde657901 55
mbed_official 87:085cde657901 56 // Clear interrupt flag
mbed_official 87:085cde657901 57 if (__HAL_GPIO_EXTI_GET_FLAG(pin) != RESET)
mbed_official 87:085cde657901 58 {
mbed_official 87:085cde657901 59 __HAL_GPIO_EXTI_CLEAR_FLAG(pin);
mbed_official 87:085cde657901 60 }
mbed_official 87:085cde657901 61
mbed_official 87:085cde657901 62 if (channel_ids[irq_index] == 0) return;
mbed_official 87:085cde657901 63
mbed_official 87:085cde657901 64 // Check which edge has generated the irq
mbed_official 87:085cde657901 65 if ((gpio->IDR & pin) == 0) {
mbed_official 87:085cde657901 66 irq_handler(channel_ids[irq_index], IRQ_FALL);
mbed_official 87:085cde657901 67 }
mbed_official 87:085cde657901 68 else {
mbed_official 87:085cde657901 69 irq_handler(channel_ids[irq_index], IRQ_RISE);
mbed_official 87:085cde657901 70 }
mbed_official 87:085cde657901 71 }
mbed_official 87:085cde657901 72
mbed_official 87:085cde657901 73 // The irq_index is passed to the function
mbed_official 87:085cde657901 74 static void gpio_irq0(void) {handle_interrupt_in(0);}
mbed_official 87:085cde657901 75 static void gpio_irq1(void) {handle_interrupt_in(1);}
mbed_official 87:085cde657901 76 static void gpio_irq2(void) {handle_interrupt_in(2);}
mbed_official 87:085cde657901 77 static void gpio_irq3(void) {handle_interrupt_in(3);}
mbed_official 87:085cde657901 78
mbed_official 87:085cde657901 79 extern uint32_t Set_GPIO_Clock(uint32_t port_idx);
mbed_official 87:085cde657901 80
mbed_official 87:085cde657901 81 int gpio_irq_init(gpio_irq_t *obj, PinName pin, gpio_irq_handler handler, uint32_t id) {
mbed_official 87:085cde657901 82 IRQn_Type irq_n = (IRQn_Type)0;
mbed_official 87:085cde657901 83 uint32_t vector = 0;
mbed_official 87:085cde657901 84 uint32_t irq_index;
mbed_official 87:085cde657901 85
mbed_official 87:085cde657901 86 if (pin == NC) return -1;
mbed_official 87:085cde657901 87
mbed_official 87:085cde657901 88 uint32_t port_index = STM_PORT(pin);
mbed_official 87:085cde657901 89 uint32_t pin_index = STM_PIN(pin);
mbed_official 87:085cde657901 90
mbed_official 87:085cde657901 91 // Select irq number and interrupt routine
mbed_official 87:085cde657901 92 switch (pin) {
mbed_official 87:085cde657901 93 case PC_13: // User button
mbed_official 87:085cde657901 94 irq_n = EXTI15_10_IRQn;
mbed_official 87:085cde657901 95 vector = (uint32_t)&gpio_irq0;
mbed_official 87:085cde657901 96 irq_index = 0;
mbed_official 87:085cde657901 97 break;
mbed_official 87:085cde657901 98 case PB_3:
mbed_official 87:085cde657901 99 irq_n = EXTI3_IRQn;
mbed_official 87:085cde657901 100 vector = (uint32_t)&gpio_irq1;
mbed_official 87:085cde657901 101 irq_index = 1;
mbed_official 87:085cde657901 102 break;
mbed_official 87:085cde657901 103 case PB_4:
mbed_official 87:085cde657901 104 irq_n = EXTI4_IRQn;
mbed_official 87:085cde657901 105 vector = (uint32_t)&gpio_irq2;
mbed_official 87:085cde657901 106 irq_index = 2;
mbed_official 87:085cde657901 107 break;
mbed_official 87:085cde657901 108 case PB_5:
mbed_official 87:085cde657901 109 irq_n = EXTI9_5_IRQn;
mbed_official 87:085cde657901 110 vector = (uint32_t)&gpio_irq3;
mbed_official 87:085cde657901 111 irq_index = 3;
mbed_official 87:085cde657901 112 break;
mbed_official 87:085cde657901 113 default:
mbed_official 87:085cde657901 114 error("InterruptIn error: pin not supported.\n");
mbed_official 87:085cde657901 115 return -1;
mbed_official 87:085cde657901 116 }
mbed_official 87:085cde657901 117
mbed_official 87:085cde657901 118 // Enable GPIO clock
mbed_official 87:085cde657901 119 uint32_t gpio_add = Set_GPIO_Clock(port_index);
mbed_official 87:085cde657901 120
mbed_official 87:085cde657901 121 // Configure GPIO
mbed_official 87:085cde657901 122 pin_function(pin, STM_PIN_DATA(STM_MODE_IT_FALLING, GPIO_NOPULL, 0));
mbed_official 87:085cde657901 123
mbed_official 87:085cde657901 124 // Enable EXTI interrupt
mbed_official 87:085cde657901 125 NVIC_SetVector(irq_n, vector);
mbed_official 87:085cde657901 126 NVIC_EnableIRQ(irq_n);
mbed_official 87:085cde657901 127
mbed_official 87:085cde657901 128 // Save informations for future use
mbed_official 87:085cde657901 129 obj->irq_n = irq_n;
mbed_official 87:085cde657901 130 obj->irq_index = irq_index;
mbed_official 87:085cde657901 131 obj->event = EDGE_NONE;
mbed_official 87:085cde657901 132 obj->pin = pin;
mbed_official 87:085cde657901 133 channel_ids[irq_index] = id;
mbed_official 87:085cde657901 134 channel_gpio[irq_index] = gpio_add;
mbed_official 87:085cde657901 135 channel_pin[irq_index] = pin_index;
mbed_official 87:085cde657901 136
mbed_official 87:085cde657901 137 irq_handler = handler;
mbed_official 87:085cde657901 138
mbed_official 87:085cde657901 139 return 0;
mbed_official 87:085cde657901 140 }
mbed_official 87:085cde657901 141
mbed_official 87:085cde657901 142 void gpio_irq_free(gpio_irq_t *obj) {
mbed_official 87:085cde657901 143 channel_ids[obj->irq_index] = 0;
mbed_official 87:085cde657901 144 channel_gpio[obj->irq_index] = 0;
mbed_official 87:085cde657901 145 channel_pin[obj->irq_index] = 0;
mbed_official 87:085cde657901 146 // Disable EXTI line
mbed_official 87:085cde657901 147 pin_function(obj->pin, STM_PIN_DATA(STM_MODE_INPUT, GPIO_NOPULL, 0));
mbed_official 87:085cde657901 148 obj->event = EDGE_NONE;
mbed_official 87:085cde657901 149 }
mbed_official 87:085cde657901 150
mbed_official 87:085cde657901 151 void gpio_irq_set(gpio_irq_t *obj, gpio_irq_event event, uint32_t enable) {
mbed_official 87:085cde657901 152 uint32_t mode = STM_MODE_INPUT;
mbed_official 87:085cde657901 153 uint32_t pull = GPIO_NOPULL;
mbed_official 87:085cde657901 154
mbed_official 87:085cde657901 155 if (enable) {
mbed_official 87:085cde657901 156
mbed_official 87:085cde657901 157 pull = GPIO_NOPULL;
mbed_official 87:085cde657901 158
mbed_official 87:085cde657901 159 if (event == IRQ_RISE) {
mbed_official 87:085cde657901 160 if ((obj->event == EDGE_FALL) || (obj->event == EDGE_BOTH)) {
mbed_official 87:085cde657901 161 mode = STM_MODE_IT_RISING_FALLING;
mbed_official 87:085cde657901 162 obj->event = EDGE_BOTH;
mbed_official 87:085cde657901 163 }
mbed_official 87:085cde657901 164 else { // NONE or RISE
mbed_official 87:085cde657901 165 mode = STM_MODE_IT_RISING;
mbed_official 87:085cde657901 166 obj->event = EDGE_RISE;
mbed_official 87:085cde657901 167 }
mbed_official 87:085cde657901 168 }
mbed_official 87:085cde657901 169
mbed_official 87:085cde657901 170 if (event == IRQ_FALL) {
mbed_official 87:085cde657901 171 if ((obj->event == EDGE_RISE) || (obj->event == EDGE_BOTH)) {
mbed_official 87:085cde657901 172 mode = STM_MODE_IT_RISING_FALLING;
mbed_official 87:085cde657901 173 obj->event = EDGE_BOTH;
mbed_official 87:085cde657901 174 }
mbed_official 87:085cde657901 175 else { // NONE or FALL
mbed_official 87:085cde657901 176 mode = STM_MODE_IT_FALLING;
mbed_official 87:085cde657901 177 obj->event = EDGE_FALL;
mbed_official 87:085cde657901 178 }
mbed_official 87:085cde657901 179 }
mbed_official 87:085cde657901 180 }
mbed_official 87:085cde657901 181 else {
mbed_official 87:085cde657901 182 mode = STM_MODE_INPUT;
mbed_official 87:085cde657901 183 pull = GPIO_NOPULL;
mbed_official 87:085cde657901 184 obj->event = EDGE_NONE;
mbed_official 87:085cde657901 185 }
mbed_official 87:085cde657901 186
mbed_official 87:085cde657901 187 pin_function(obj->pin, STM_PIN_DATA(mode, pull, 0));
mbed_official 87:085cde657901 188 }
mbed_official 87:085cde657901 189
mbed_official 87:085cde657901 190 void gpio_irq_enable(gpio_irq_t *obj) {
mbed_official 87:085cde657901 191 NVIC_EnableIRQ(obj->irq_n);
mbed_official 87:085cde657901 192 }
mbed_official 87:085cde657901 193
mbed_official 87:085cde657901 194 void gpio_irq_disable(gpio_irq_t *obj) {
mbed_official 87:085cde657901 195 NVIC_DisableIRQ(obj->irq_n);
mbed_official 87:085cde657901 196 obj->event = EDGE_NONE;
mbed_official 87:085cde657901 197 }