+++ /dev/null
-/* mbed Microcontroller Library
- *******************************************************************************
- * Copyright (c) 2014, STMicroelectronics
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions are met:
- *
- * 1. Redistributions of source code must retain the above copyright notice,
- * this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright notice,
- * this list of conditions and the following disclaimer in the documentation
- * and/or other materials provided with the distribution.
- * 3. Neither the name of STMicroelectronics nor the names of its contributors
- * may be used to endorse or promote products derived from this software
- * without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
- * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
- * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
- * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
- * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
- * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
- * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- *******************************************************************************
- */
-#include <stddef.h>
-#include "cmsis.h"
-
-#include "gpio_irq_api.h"
-#include "pinmap.h"
-#include "mbed_error.h"
-
-#define EDGE_NONE (0)
-#define EDGE_RISE (1)
-#define EDGE_FALL (2)
-#define EDGE_BOTH (3)
-
-#define CHANNEL_NUM (7)
-
-static uint32_t channel_ids[CHANNEL_NUM] = {0, 0, 0, 0, 0, 0, 0};
-static uint32_t channel_gpio[CHANNEL_NUM] = {0, 0, 0, 0, 0, 0, 0};
-static uint32_t channel_pin[CHANNEL_NUM] = {0, 0, 0, 0, 0, 0, 0};
-
-static gpio_irq_handler irq_handler;
-
-static void handle_interrupt_in(uint32_t irq_index) {
- // Retrieve the gpio and pin that generate the irq
- GPIO_TypeDef *gpio = (GPIO_TypeDef *)(channel_gpio[irq_index]);
- uint32_t pin = (uint32_t)(1 << channel_pin[irq_index]);
-
- // Clear interrupt flag
- if (EXTI_GetITStatus(channel_pin[irq_index]) != RESET) {
- EXTI_ClearITPendingBit(channel_pin[irq_index]);
- }
-
- if (channel_ids[irq_index] == 0) return;
-
- // Check which edge has generated the irq
- if ((gpio->IDR & pin) == 0) {
- irq_handler(channel_ids[irq_index], IRQ_FALL);
- } else {
- irq_handler(channel_ids[irq_index], IRQ_RISE);
- }
-}
-
-static void gpio_irq0(void) {
- handle_interrupt_in(0); // EXTI line 0
-}
-
-static void gpio_irq1(void) {
- handle_interrupt_in(1); // EXTI line 1
-}
-
-static void gpio_irq2(void) {
- handle_interrupt_in(2); // EXTI line 2
-}
-
-static void gpio_irq3(void) {
- handle_interrupt_in(3); // EXTI line 3
-}
-
-static void gpio_irq4(void) {
- handle_interrupt_in(4); // EXTI line 4
-}
-
-static void gpio_irq5(void) {
- handle_interrupt_in(5); // EXTI lines 5 to 9
-}
-
-static void gpio_irq6(void) {
- handle_interrupt_in(6); // EXTI lines 10 to 15
-}
-
-extern uint32_t Set_GPIO_Clock(uint32_t port_idx);
-
-int gpio_irq_init(gpio_irq_t *obj, PinName pin, gpio_irq_handler handler, uint32_t id) {
- IRQn_Type irq_n = (IRQn_Type)0;
- uint32_t vector = 0;
- uint32_t irq_index;
-
- if (pin == NC) return -1;
-
- uint32_t port_index = STM_PORT(pin);
- uint32_t pin_index = STM_PIN(pin);
-
- // Select irq number and interrupt routine
- switch (pin_index) {
- case 0:
- irq_n = EXTI0_IRQn;
- vector = (uint32_t)&gpio_irq0;
- irq_index = 0;
- break;
- case 1:
- irq_n = EXTI1_IRQn;
- vector = (uint32_t)&gpio_irq1;
- irq_index = 1;
- break;
- case 2:
- irq_n = EXTI2_TS_IRQn;
- vector = (uint32_t)&gpio_irq2;
- irq_index = 2;
- break;
- case 3:
- irq_n = EXTI3_IRQn;
- vector = (uint32_t)&gpio_irq3;
- irq_index = 3;
- break;
- case 4:
- irq_n = EXTI4_IRQn;
- vector = (uint32_t)&gpio_irq4;
- irq_index = 4;
- break;
- case 5:
- case 6:
- case 7:
- case 8:
- case 9:
- irq_n = EXTI9_5_IRQn;
- vector = (uint32_t)&gpio_irq5;
- irq_index = 5;
- break;
- case 10:
- case 11:
- case 12:
- case 13:
- case 14:
- case 15:
- irq_n = EXTI15_10_IRQn;
- vector = (uint32_t)&gpio_irq6;
- irq_index = 6;
- break;
- default:
- error("This pin is not supported with InterruptIn.");
- return -1;
- }
-
- // Enable GPIO clock
- uint32_t gpio_add = Set_GPIO_Clock(port_index);
-
- // Enable SYSCFG clock
- RCC_APB2PeriphClockCmd(RCC_APB2Periph_SYSCFG, ENABLE);
-
- // Connect EXTI line to pin
- SYSCFG_EXTILineConfig(port_index, pin_index);
-
- // Configure EXTI line
- EXTI_InitTypeDef EXTI_InitStructure;
- EXTI_InitStructure.EXTI_Line = pin_index;
- EXTI_InitStructure.EXTI_Mode = EXTI_Mode_Interrupt;
- EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Falling;
- EXTI_InitStructure.EXTI_LineCmd = ENABLE;
- EXTI_Init(&EXTI_InitStructure);
-
- // Enable and set EXTI interrupt to the lowest priority
- NVIC_InitTypeDef NVIC_InitStructure;
- NVIC_InitStructure.NVIC_IRQChannel = irq_n;
- NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0x0F;
- NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0x0F;
- NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
- NVIC_Init(&NVIC_InitStructure);
-
- NVIC_SetVector(irq_n, vector);
- NVIC_EnableIRQ(irq_n);
-
- // Save informations for future use
- obj->irq_n = irq_n;
- obj->irq_index = irq_index;
- obj->event = EDGE_NONE;
- channel_ids[irq_index] = id;
- channel_gpio[irq_index] = gpio_add;
- channel_pin[irq_index] = pin_index;
-
- irq_handler = handler;
-
- return 0;
-}
-
-void gpio_irq_free(gpio_irq_t *obj) {
- channel_ids[obj->irq_index] = 0;
- channel_gpio[obj->irq_index] = 0;
- channel_pin[obj->irq_index] = 0;
- // Disable EXTI line
- EXTI_InitTypeDef EXTI_InitStructure;
- EXTI_StructInit(&EXTI_InitStructure);
- EXTI_Init(&EXTI_InitStructure);
- obj->event = EDGE_NONE;
-}
-
-void gpio_irq_set(gpio_irq_t *obj, gpio_irq_event event, uint32_t enable) {
- EXTI_InitTypeDef EXTI_InitStructure;
-
- EXTI_InitStructure.EXTI_Line = channel_pin[obj->irq_index];
- EXTI_InitStructure.EXTI_Mode = EXTI_Mode_Interrupt;
-
- if (event == IRQ_RISE) {
- if ((obj->event == EDGE_FALL) || (obj->event == EDGE_BOTH)) {
- EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Rising_Falling;
- obj->event = EDGE_BOTH;
- } else { // NONE or RISE
- EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Rising;
- obj->event = EDGE_RISE;
- }
- }
-
- if (event == IRQ_FALL) {
- if ((obj->event == EDGE_RISE) || (obj->event == EDGE_BOTH)) {
- EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Rising_Falling;
- obj->event = EDGE_BOTH;
- } else { // NONE or FALL
- EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Falling;
- obj->event = EDGE_FALL;
- }
- }
-
- if (enable) {
- EXTI_InitStructure.EXTI_LineCmd = ENABLE;
- } else {
- EXTI_InitStructure.EXTI_LineCmd = DISABLE;
- }
-
- EXTI_Init(&EXTI_InitStructure);
-}
-
-void gpio_irq_enable(gpio_irq_t *obj) {
- NVIC_EnableIRQ(obj->irq_n);
-}
-
-void gpio_irq_disable(gpio_irq_t *obj) {
- NVIC_DisableIRQ(obj->irq_n);
- obj->event = EDGE_NONE;
-}
projects / qmk_firmware.git / blobdiff