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targets/hal/TARGET_STM/TARGET_NUCLEO_F103RB/gpio_irq_api.c@60:142c6c6f5949, 2013-12-17 (annotated)
- Committer:
- mbed_official
- Date:
- Tue Dec 17 08:45:10 2013 +0000
- Revision:
- 60:142c6c6f5949
- Child:
- 70:c1fbde68b492
Synchronized with git revision 572b22395f1ebb513f4fbd423214cb39a18dc58b
Full URL: https://github.com/mbedmicro/mbed/commit/572b22395f1ebb513f4fbd423214cb39a18dc58b/
[NUCLEO_F103RB] InterruptIn, Sleep, RTC added
Who changed what in which revision?
User | Revision | Line number | New contents of line |
---|---|---|---|
mbed_official | 60:142c6c6f5949 | 1 | /* mbed Microcontroller Library |
mbed_official | 60:142c6c6f5949 | 2 | * Copyright (c) 2006-2013 ARM Limited |
mbed_official | 60:142c6c6f5949 | 3 | * |
mbed_official | 60:142c6c6f5949 | 4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
mbed_official | 60:142c6c6f5949 | 5 | * you may not use this file except in compliance with the License. |
mbed_official | 60:142c6c6f5949 | 6 | * You may obtain a copy of the License at |
mbed_official | 60:142c6c6f5949 | 7 | * |
mbed_official | 60:142c6c6f5949 | 8 | * http://www.apache.org/licenses/LICENSE-2.0 |
mbed_official | 60:142c6c6f5949 | 9 | * |
mbed_official | 60:142c6c6f5949 | 10 | * Unless required by applicable law or agreed to in writing, software |
mbed_official | 60:142c6c6f5949 | 11 | * distributed under the License is distributed on an "AS IS" BASIS, |
mbed_official | 60:142c6c6f5949 | 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
mbed_official | 60:142c6c6f5949 | 13 | * See the License for the specific language governing permissions and |
mbed_official | 60:142c6c6f5949 | 14 | * limitations under the License. |
mbed_official | 60:142c6c6f5949 | 15 | */ |
mbed_official | 60:142c6c6f5949 | 16 | #include <stddef.h> |
mbed_official | 60:142c6c6f5949 | 17 | #include "cmsis.h" |
mbed_official | 60:142c6c6f5949 | 18 | |
mbed_official | 60:142c6c6f5949 | 19 | #include "gpio_irq_api.h" |
mbed_official | 60:142c6c6f5949 | 20 | #include "error.h" |
mbed_official | 60:142c6c6f5949 | 21 | |
mbed_official | 60:142c6c6f5949 | 22 | #define EDGE_NONE (0) |
mbed_official | 60:142c6c6f5949 | 23 | #define EDGE_RISE (1) |
mbed_official | 60:142c6c6f5949 | 24 | #define EDGE_FALL (2) |
mbed_official | 60:142c6c6f5949 | 25 | #define EDGE_BOTH (3) |
mbed_official | 60:142c6c6f5949 | 26 | |
mbed_official | 60:142c6c6f5949 | 27 | #define CHANNEL_NUM (16) |
mbed_official | 60:142c6c6f5949 | 28 | |
mbed_official | 60:142c6c6f5949 | 29 | static uint32_t channel_ids[CHANNEL_NUM] = {0}; |
mbed_official | 60:142c6c6f5949 | 30 | |
mbed_official | 60:142c6c6f5949 | 31 | static gpio_irq_handler irq_handler; |
mbed_official | 60:142c6c6f5949 | 32 | |
mbed_official | 60:142c6c6f5949 | 33 | static void handle_interrupt_in(uint32_t channel) { |
mbed_official | 60:142c6c6f5949 | 34 | if (channel_ids[channel] == 0) return; |
mbed_official | 60:142c6c6f5949 | 35 | |
mbed_official | 60:142c6c6f5949 | 36 | uint32_t exti_line = (uint32_t)(1 << channel); |
mbed_official | 60:142c6c6f5949 | 37 | if (EXTI_GetITStatus(exti_line) != RESET) |
mbed_official | 60:142c6c6f5949 | 38 | { |
mbed_official | 60:142c6c6f5949 | 39 | EXTI_ClearITPendingBit(exti_line); |
mbed_official | 60:142c6c6f5949 | 40 | } |
mbed_official | 60:142c6c6f5949 | 41 | |
mbed_official | 60:142c6c6f5949 | 42 | // Warning: |
mbed_official | 60:142c6c6f5949 | 43 | // On this device we don't know if a rising or falling event occured. |
mbed_official | 60:142c6c6f5949 | 44 | // In case both rise and fall events are set, only the FALL event will be reported. |
mbed_official | 60:142c6c6f5949 | 45 | if (EXTI->FTSR & (uint32_t)(1 << channel)) { |
mbed_official | 60:142c6c6f5949 | 46 | irq_handler(channel_ids[channel], IRQ_FALL); |
mbed_official | 60:142c6c6f5949 | 47 | } |
mbed_official | 60:142c6c6f5949 | 48 | else { |
mbed_official | 60:142c6c6f5949 | 49 | irq_handler(channel_ids[channel], IRQ_RISE); |
mbed_official | 60:142c6c6f5949 | 50 | } |
mbed_official | 60:142c6c6f5949 | 51 | } |
mbed_official | 60:142c6c6f5949 | 52 | |
mbed_official | 60:142c6c6f5949 | 53 | static void gpio_irq0(void) {handle_interrupt_in(0);} |
mbed_official | 60:142c6c6f5949 | 54 | static void gpio_irq1(void) {handle_interrupt_in(1);} |
mbed_official | 60:142c6c6f5949 | 55 | static void gpio_irq2(void) {handle_interrupt_in(2);} |
mbed_official | 60:142c6c6f5949 | 56 | static void gpio_irq3(void) {handle_interrupt_in(3);} |
mbed_official | 60:142c6c6f5949 | 57 | static void gpio_irq4(void) {handle_interrupt_in(4);} |
mbed_official | 60:142c6c6f5949 | 58 | static void gpio_irq5(void) {handle_interrupt_in(5);} |
mbed_official | 60:142c6c6f5949 | 59 | static void gpio_irq6(void) {handle_interrupt_in(6);} |
mbed_official | 60:142c6c6f5949 | 60 | static void gpio_irq7(void) {handle_interrupt_in(7);} |
mbed_official | 60:142c6c6f5949 | 61 | static void gpio_irq8(void) {handle_interrupt_in(8);} |
mbed_official | 60:142c6c6f5949 | 62 | static void gpio_irq9(void) {handle_interrupt_in(9);} |
mbed_official | 60:142c6c6f5949 | 63 | static void gpio_irq10(void) {handle_interrupt_in(10);} |
mbed_official | 60:142c6c6f5949 | 64 | static void gpio_irq11(void) {handle_interrupt_in(11);} |
mbed_official | 60:142c6c6f5949 | 65 | static void gpio_irq12(void) {handle_interrupt_in(12);} |
mbed_official | 60:142c6c6f5949 | 66 | static void gpio_irq13(void) {handle_interrupt_in(13);} |
mbed_official | 60:142c6c6f5949 | 67 | static void gpio_irq14(void) {handle_interrupt_in(14);} |
mbed_official | 60:142c6c6f5949 | 68 | static void gpio_irq15(void) {handle_interrupt_in(15);} |
mbed_official | 60:142c6c6f5949 | 69 | |
mbed_official | 60:142c6c6f5949 | 70 | int gpio_irq_init(gpio_irq_t *obj, PinName pin, gpio_irq_handler handler, uint32_t id) { |
mbed_official | 60:142c6c6f5949 | 71 | IRQn_Type irq_n = (IRQn_Type)0; |
mbed_official | 60:142c6c6f5949 | 72 | uint32_t vector = 0; |
mbed_official | 60:142c6c6f5949 | 73 | |
mbed_official | 60:142c6c6f5949 | 74 | if (pin == NC) return -1; |
mbed_official | 60:142c6c6f5949 | 75 | |
mbed_official | 60:142c6c6f5949 | 76 | uint32_t pin_number = (uint32_t)pin; |
mbed_official | 60:142c6c6f5949 | 77 | uint32_t pin_index = (pin_number & 0xF); |
mbed_official | 60:142c6c6f5949 | 78 | uint32_t port_index = (pin_number >> 4); |
mbed_official | 60:142c6c6f5949 | 79 | |
mbed_official | 60:142c6c6f5949 | 80 | // Select irq number and vector |
mbed_official | 60:142c6c6f5949 | 81 | switch (pin_index) { |
mbed_official | 60:142c6c6f5949 | 82 | case 0: |
mbed_official | 60:142c6c6f5949 | 83 | irq_n = EXTI0_IRQn; |
mbed_official | 60:142c6c6f5949 | 84 | vector = (uint32_t)&gpio_irq0; |
mbed_official | 60:142c6c6f5949 | 85 | break; |
mbed_official | 60:142c6c6f5949 | 86 | case 1: |
mbed_official | 60:142c6c6f5949 | 87 | irq_n = EXTI1_IRQn; |
mbed_official | 60:142c6c6f5949 | 88 | vector = (uint32_t)&gpio_irq1; |
mbed_official | 60:142c6c6f5949 | 89 | break; |
mbed_official | 60:142c6c6f5949 | 90 | case 2: |
mbed_official | 60:142c6c6f5949 | 91 | irq_n = EXTI2_IRQn; |
mbed_official | 60:142c6c6f5949 | 92 | vector = (uint32_t)&gpio_irq2; |
mbed_official | 60:142c6c6f5949 | 93 | break; |
mbed_official | 60:142c6c6f5949 | 94 | case 3: |
mbed_official | 60:142c6c6f5949 | 95 | irq_n = EXTI3_IRQn; |
mbed_official | 60:142c6c6f5949 | 96 | vector = (uint32_t)&gpio_irq3; |
mbed_official | 60:142c6c6f5949 | 97 | break; |
mbed_official | 60:142c6c6f5949 | 98 | case 4: |
mbed_official | 60:142c6c6f5949 | 99 | irq_n = EXTI4_IRQn; |
mbed_official | 60:142c6c6f5949 | 100 | vector = (uint32_t)&gpio_irq4; |
mbed_official | 60:142c6c6f5949 | 101 | break; |
mbed_official | 60:142c6c6f5949 | 102 | case 5: |
mbed_official | 60:142c6c6f5949 | 103 | irq_n = EXTI9_5_IRQn; |
mbed_official | 60:142c6c6f5949 | 104 | vector = (uint32_t)&gpio_irq5; |
mbed_official | 60:142c6c6f5949 | 105 | break; |
mbed_official | 60:142c6c6f5949 | 106 | case 6: |
mbed_official | 60:142c6c6f5949 | 107 | irq_n = EXTI9_5_IRQn; |
mbed_official | 60:142c6c6f5949 | 108 | vector = (uint32_t)&gpio_irq6; |
mbed_official | 60:142c6c6f5949 | 109 | break; |
mbed_official | 60:142c6c6f5949 | 110 | case 7: |
mbed_official | 60:142c6c6f5949 | 111 | irq_n = EXTI9_5_IRQn; |
mbed_official | 60:142c6c6f5949 | 112 | vector = (uint32_t)&gpio_irq7; |
mbed_official | 60:142c6c6f5949 | 113 | break; |
mbed_official | 60:142c6c6f5949 | 114 | case 8: |
mbed_official | 60:142c6c6f5949 | 115 | irq_n = EXTI9_5_IRQn; |
mbed_official | 60:142c6c6f5949 | 116 | vector = (uint32_t)&gpio_irq8; |
mbed_official | 60:142c6c6f5949 | 117 | break; |
mbed_official | 60:142c6c6f5949 | 118 | case 9: |
mbed_official | 60:142c6c6f5949 | 119 | irq_n = EXTI9_5_IRQn; |
mbed_official | 60:142c6c6f5949 | 120 | vector = (uint32_t)&gpio_irq9; |
mbed_official | 60:142c6c6f5949 | 121 | break; |
mbed_official | 60:142c6c6f5949 | 122 | case 10: |
mbed_official | 60:142c6c6f5949 | 123 | irq_n = EXTI15_10_IRQn; |
mbed_official | 60:142c6c6f5949 | 124 | vector = (uint32_t)&gpio_irq10; |
mbed_official | 60:142c6c6f5949 | 125 | break; |
mbed_official | 60:142c6c6f5949 | 126 | case 11: |
mbed_official | 60:142c6c6f5949 | 127 | irq_n = EXTI15_10_IRQn; |
mbed_official | 60:142c6c6f5949 | 128 | vector = (uint32_t)&gpio_irq11; |
mbed_official | 60:142c6c6f5949 | 129 | break; |
mbed_official | 60:142c6c6f5949 | 130 | case 12: |
mbed_official | 60:142c6c6f5949 | 131 | irq_n = EXTI15_10_IRQn; |
mbed_official | 60:142c6c6f5949 | 132 | vector = (uint32_t)&gpio_irq12; |
mbed_official | 60:142c6c6f5949 | 133 | break; |
mbed_official | 60:142c6c6f5949 | 134 | case 13: |
mbed_official | 60:142c6c6f5949 | 135 | irq_n = EXTI15_10_IRQn; |
mbed_official | 60:142c6c6f5949 | 136 | vector = (uint32_t)&gpio_irq13; |
mbed_official | 60:142c6c6f5949 | 137 | break; |
mbed_official | 60:142c6c6f5949 | 138 | case 14: |
mbed_official | 60:142c6c6f5949 | 139 | irq_n = EXTI15_10_IRQn; |
mbed_official | 60:142c6c6f5949 | 140 | vector = (uint32_t)&gpio_irq14; |
mbed_official | 60:142c6c6f5949 | 141 | break; |
mbed_official | 60:142c6c6f5949 | 142 | case 15: |
mbed_official | 60:142c6c6f5949 | 143 | irq_n = EXTI15_10_IRQn; |
mbed_official | 60:142c6c6f5949 | 144 | vector = (uint32_t)&gpio_irq15; |
mbed_official | 60:142c6c6f5949 | 145 | break; |
mbed_official | 60:142c6c6f5949 | 146 | default: |
mbed_official | 60:142c6c6f5949 | 147 | return -1; |
mbed_official | 60:142c6c6f5949 | 148 | } |
mbed_official | 60:142c6c6f5949 | 149 | |
mbed_official | 60:142c6c6f5949 | 150 | // Enable GPIO and AFIO clocks |
mbed_official | 60:142c6c6f5949 | 151 | RCC_APB2PeriphClockCmd((uint32_t)(RCC_APB2Periph_GPIOA << port_index), ENABLE); |
mbed_official | 60:142c6c6f5949 | 152 | RCC_APB2PeriphClockCmd(RCC_APB2Periph_AFIO, ENABLE); |
mbed_official | 60:142c6c6f5949 | 153 | |
mbed_official | 60:142c6c6f5949 | 154 | // Connect EXTI line to pin |
mbed_official | 60:142c6c6f5949 | 155 | GPIO_EXTILineConfig(port_index, pin_index); |
mbed_official | 60:142c6c6f5949 | 156 | |
mbed_official | 60:142c6c6f5949 | 157 | // Configure EXTI line |
mbed_official | 60:142c6c6f5949 | 158 | EXTI_InitTypeDef EXTI_InitStructure; |
mbed_official | 60:142c6c6f5949 | 159 | EXTI_InitStructure.EXTI_Line = (uint32_t)(1 << pin_index); |
mbed_official | 60:142c6c6f5949 | 160 | EXTI_InitStructure.EXTI_Mode = EXTI_Mode_Interrupt; |
mbed_official | 60:142c6c6f5949 | 161 | EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Falling; |
mbed_official | 60:142c6c6f5949 | 162 | EXTI_InitStructure.EXTI_LineCmd = ENABLE; |
mbed_official | 60:142c6c6f5949 | 163 | EXTI_Init(&EXTI_InitStructure); |
mbed_official | 60:142c6c6f5949 | 164 | |
mbed_official | 60:142c6c6f5949 | 165 | // Enable and set EXTI interrupt to the lowest priority |
mbed_official | 60:142c6c6f5949 | 166 | NVIC_InitTypeDef NVIC_InitStructure; |
mbed_official | 60:142c6c6f5949 | 167 | NVIC_InitStructure.NVIC_IRQChannel = irq_n; |
mbed_official | 60:142c6c6f5949 | 168 | NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0x0F; |
mbed_official | 60:142c6c6f5949 | 169 | NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0x0F; |
mbed_official | 60:142c6c6f5949 | 170 | NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE; |
mbed_official | 60:142c6c6f5949 | 171 | NVIC_Init(&NVIC_InitStructure); |
mbed_official | 60:142c6c6f5949 | 172 | |
mbed_official | 60:142c6c6f5949 | 173 | NVIC_SetVector(irq_n, vector); |
mbed_official | 60:142c6c6f5949 | 174 | NVIC_EnableIRQ(irq_n); |
mbed_official | 60:142c6c6f5949 | 175 | |
mbed_official | 60:142c6c6f5949 | 176 | // Save for future use |
mbed_official | 60:142c6c6f5949 | 177 | obj->ch = pin_index; |
mbed_official | 60:142c6c6f5949 | 178 | obj->irq_n = irq_n; |
mbed_official | 60:142c6c6f5949 | 179 | obj->event = EDGE_NONE; |
mbed_official | 60:142c6c6f5949 | 180 | |
mbed_official | 60:142c6c6f5949 | 181 | channel_ids[obj->ch] = id; |
mbed_official | 60:142c6c6f5949 | 182 | |
mbed_official | 60:142c6c6f5949 | 183 | irq_handler = handler; |
mbed_official | 60:142c6c6f5949 | 184 | |
mbed_official | 60:142c6c6f5949 | 185 | return 0; |
mbed_official | 60:142c6c6f5949 | 186 | } |
mbed_official | 60:142c6c6f5949 | 187 | |
mbed_official | 60:142c6c6f5949 | 188 | void gpio_irq_free(gpio_irq_t *obj) { |
mbed_official | 60:142c6c6f5949 | 189 | channel_ids[obj->ch] = 0; |
mbed_official | 60:142c6c6f5949 | 190 | // Disable EXTI line |
mbed_official | 60:142c6c6f5949 | 191 | EXTI_InitTypeDef EXTI_InitStructure; |
mbed_official | 60:142c6c6f5949 | 192 | EXTI_StructInit(&EXTI_InitStructure); |
mbed_official | 60:142c6c6f5949 | 193 | EXTI_Init(&EXTI_InitStructure); |
mbed_official | 60:142c6c6f5949 | 194 | obj->event = EDGE_NONE; |
mbed_official | 60:142c6c6f5949 | 195 | } |
mbed_official | 60:142c6c6f5949 | 196 | |
mbed_official | 60:142c6c6f5949 | 197 | void gpio_irq_set(gpio_irq_t *obj, gpio_irq_event event, uint32_t enable) { |
mbed_official | 60:142c6c6f5949 | 198 | EXTI_InitTypeDef EXTI_InitStructure; |
mbed_official | 60:142c6c6f5949 | 199 | |
mbed_official | 60:142c6c6f5949 | 200 | EXTI_InitStructure.EXTI_Line = (uint32_t)(1 << obj->ch); |
mbed_official | 60:142c6c6f5949 | 201 | EXTI_InitStructure.EXTI_Mode = EXTI_Mode_Interrupt; |
mbed_official | 60:142c6c6f5949 | 202 | |
mbed_official | 60:142c6c6f5949 | 203 | if (event == IRQ_RISE) { |
mbed_official | 60:142c6c6f5949 | 204 | if ((obj->event == EDGE_FALL) || (obj->event == EDGE_BOTH)) { |
mbed_official | 60:142c6c6f5949 | 205 | EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Rising_Falling; |
mbed_official | 60:142c6c6f5949 | 206 | obj->event = EDGE_BOTH; |
mbed_official | 60:142c6c6f5949 | 207 | } |
mbed_official | 60:142c6c6f5949 | 208 | else { // NONE or RISE |
mbed_official | 60:142c6c6f5949 | 209 | EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Rising; |
mbed_official | 60:142c6c6f5949 | 210 | obj->event = EDGE_RISE; |
mbed_official | 60:142c6c6f5949 | 211 | } |
mbed_official | 60:142c6c6f5949 | 212 | } |
mbed_official | 60:142c6c6f5949 | 213 | |
mbed_official | 60:142c6c6f5949 | 214 | if (event == IRQ_FALL) { |
mbed_official | 60:142c6c6f5949 | 215 | if ((obj->event == EDGE_RISE) || (obj->event == EDGE_BOTH)) { |
mbed_official | 60:142c6c6f5949 | 216 | EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Rising_Falling; |
mbed_official | 60:142c6c6f5949 | 217 | obj->event = EDGE_BOTH; |
mbed_official | 60:142c6c6f5949 | 218 | } |
mbed_official | 60:142c6c6f5949 | 219 | else { // NONE or FALL |
mbed_official | 60:142c6c6f5949 | 220 | EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Falling; |
mbed_official | 60:142c6c6f5949 | 221 | obj->event = EDGE_FALL; |
mbed_official | 60:142c6c6f5949 | 222 | } |
mbed_official | 60:142c6c6f5949 | 223 | } |
mbed_official | 60:142c6c6f5949 | 224 | |
mbed_official | 60:142c6c6f5949 | 225 | if (enable) { |
mbed_official | 60:142c6c6f5949 | 226 | EXTI_InitStructure.EXTI_LineCmd = ENABLE; |
mbed_official | 60:142c6c6f5949 | 227 | } |
mbed_official | 60:142c6c6f5949 | 228 | else { |
mbed_official | 60:142c6c6f5949 | 229 | EXTI_InitStructure.EXTI_LineCmd = DISABLE; |
mbed_official | 60:142c6c6f5949 | 230 | } |
mbed_official | 60:142c6c6f5949 | 231 | |
mbed_official | 60:142c6c6f5949 | 232 | EXTI_Init(&EXTI_InitStructure); |
mbed_official | 60:142c6c6f5949 | 233 | } |
mbed_official | 60:142c6c6f5949 | 234 | |
mbed_official | 60:142c6c6f5949 | 235 | void gpio_irq_enable(gpio_irq_t *obj) { |
mbed_official | 60:142c6c6f5949 | 236 | NVIC_EnableIRQ(obj->irq_n); |
mbed_official | 60:142c6c6f5949 | 237 | } |
mbed_official | 60:142c6c6f5949 | 238 | |
mbed_official | 60:142c6c6f5949 | 239 | void gpio_irq_disable(gpio_irq_t *obj) { |
mbed_official | 60:142c6c6f5949 | 240 | NVIC_DisableIRQ(obj->irq_n); |
mbed_official | 60:142c6c6f5949 | 241 | obj->event = EDGE_NONE; |
mbed_official | 60:142c6c6f5949 | 242 | } |