mbed library sources
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Diff: targets/hal/TARGET_STM/TARGET_NUCLEO_F411RE/gpio_irq_api.c
- Revision:
- 429:cc5da43e7bf6
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- 428:4ddf7f7eabbb
- Child:
- 430:d406b7919023
--- a/targets/hal/TARGET_STM/TARGET_NUCLEO_F411RE/gpio_irq_api.c Mon Dec 08 07:30:07 2014 +0000 +++ /dev/null Thu Jan 01 00:00:00 1970 +0000 @@ -1,332 +0,0 @@ -/* 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) - -// Number of EXTI irq vectors (EXTI0, EXTI1, EXTI2, EXTI3, EXTI4, EXTI5_9, EXTI10_15) -#define CHANNEL_NUM (7) - -// Max pins for one line (max with EXTI10_15) -#define MAX_PIN_LINE (6) - -typedef struct gpio_channel { - uint32_t pin_mask; // bitmask representing which pins are configured for receiving interrupts - uint32_t channel_ids[MAX_PIN_LINE]; // mbed "gpio_irq_t gpio_irq" field of instance - uint32_t channel_gpio[MAX_PIN_LINE]; // base address of gpio port group - uint32_t channel_pin[MAX_PIN_LINE]; // pin number in port group -} gpio_channel_t; - -static gpio_channel_t channels[CHANNEL_NUM] = { - {.pin_mask = 0}, - {.pin_mask = 0}, - {.pin_mask = 0}, - {.pin_mask = 0}, - {.pin_mask = 0}, - {.pin_mask = 0}, - {.pin_mask = 0} -}; - -// Used to return the index for channels array. -static uint32_t pin_base_nr[16] = { - // EXTI0 - 0, // pin 0 - // EXTI1 - 0, // pin 1 - // EXTI2 - 0, // pin 2 - // EXTI3 - 0, // pin 3 - // EXTI4 - 0, // pin 4 - // EXTI5_9 - 0, // pin 5 - 1, // pin 6 - 2, // pin 7 - 3, // pin 8 - 4, // pin 9 - // EXTI10_15 - 0, // pin 10 - 1, // pin 11 - 2, // pin 12 - 3, // pin 13 - 4, // pin 14 - 5 // pin 15 -}; - -static gpio_irq_handler irq_handler; - -static void handle_interrupt_in(uint32_t irq_index, uint32_t max_num_pin_line) -{ - gpio_channel_t *gpio_channel = &channels[irq_index]; - uint32_t gpio_idx; - - for (gpio_idx = 0; gpio_idx < max_num_pin_line; gpio_idx++) { - uint32_t current_mask = (1 << gpio_idx); - - if (gpio_channel->pin_mask & current_mask) { - // Retrieve the gpio and pin that generate the irq - GPIO_TypeDef *gpio = (GPIO_TypeDef *)(gpio_channel->channel_gpio[gpio_idx]); - uint32_t pin = (uint32_t)(1 << (gpio_channel->channel_pin[gpio_idx])); - - // Clear interrupt flag - if (__HAL_GPIO_EXTI_GET_FLAG(pin) != RESET) { - __HAL_GPIO_EXTI_CLEAR_FLAG(pin); - - if (gpio_channel->channel_ids[gpio_idx] == 0) continue; - - // Check which edge has generated the irq - if ((gpio->IDR & pin) == 0) { - irq_handler(gpio_channel->channel_ids[gpio_idx], IRQ_FALL); - } else { - irq_handler(gpio_channel->channel_ids[gpio_idx], IRQ_RISE); - } - } - } - } -} - -// EXTI line 0 -static void gpio_irq0(void) -{ - handle_interrupt_in(0, 1); -} - -// EXTI line 1 -static void gpio_irq1(void) -{ - handle_interrupt_in(1, 1); -} - -// EXTI line 2 -static void gpio_irq2(void) -{ - handle_interrupt_in(2, 1); -} - -// EXTI line 3 -static void gpio_irq3(void) -{ - handle_interrupt_in(3, 1); -} - -// EXTI line 4 -static void gpio_irq4(void) -{ - handle_interrupt_in(4, 1); -} - -// EXTI lines 5 to 9 -static void gpio_irq5(void) -{ - handle_interrupt_in(5, 5); -} - -// EXTI lines 10 to 15 -static void gpio_irq6(void) -{ - handle_interrupt_in(6, 6); -} - -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; - gpio_channel_t *gpio_channel; - uint32_t gpio_idx; - - 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_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("InterruptIn error: pin not supported.\n"); - return -1; - } - - // Enable GPIO clock - uint32_t gpio_add = Set_GPIO_Clock(port_index); - - // Configure GPIO - pin_function(pin, STM_PIN_DATA(STM_MODE_IT_FALLING, GPIO_NOPULL, 0)); - - // Enable EXTI interrupt - 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; - obj->pin = pin; - - gpio_channel = &channels[irq_index]; - gpio_idx = pin_base_nr[pin_index]; - gpio_channel->pin_mask |= (1 << gpio_idx); - gpio_channel->channel_ids[gpio_idx] = id; - gpio_channel->channel_gpio[gpio_idx] = gpio_add; - gpio_channel->channel_pin[gpio_idx] = pin_index; - - irq_handler = handler; - - return 0; -} - -void gpio_irq_free(gpio_irq_t *obj) -{ - gpio_channel_t *gpio_channel = &channels[obj->irq_index]; - uint32_t pin_index = STM_PIN(obj->pin); - uint32_t gpio_idx = pin_base_nr[pin_index]; - - gpio_channel->pin_mask &= ~(1 << gpio_idx); - gpio_channel->channel_ids[gpio_idx] = 0; - gpio_channel->channel_gpio[gpio_idx] = 0; - gpio_channel->channel_pin[gpio_idx] = 0; - - // Disable EXTI line - pin_function(obj->pin, STM_PIN_DATA(STM_MODE_INPUT, GPIO_NOPULL, 0)); - obj->event = EDGE_NONE; -} - -void gpio_irq_set(gpio_irq_t *obj, gpio_irq_event event, uint32_t enable) -{ - uint32_t mode = STM_MODE_IT_EVT_RESET; - uint32_t pull = GPIO_NOPULL; - - if (enable) { - if (event == IRQ_RISE) { - if ((obj->event == EDGE_FALL) || (obj->event == EDGE_BOTH)) { - mode = STM_MODE_IT_RISING_FALLING; - obj->event = EDGE_BOTH; - } else { // NONE or RISE - mode = STM_MODE_IT_RISING; - obj->event = EDGE_RISE; - } - } - if (event == IRQ_FALL) { - if ((obj->event == EDGE_RISE) || (obj->event == EDGE_BOTH)) { - mode = STM_MODE_IT_RISING_FALLING; - obj->event = EDGE_BOTH; - } else { // NONE or FALL - mode = STM_MODE_IT_FALLING; - obj->event = EDGE_FALL; - } - } - } else { // Disable - if (event == IRQ_RISE) { - if ((obj->event == EDGE_FALL) || (obj->event == EDGE_BOTH)) { - mode = STM_MODE_IT_FALLING; - obj->event = EDGE_FALL; - } else { // NONE or RISE - mode = STM_MODE_IT_EVT_RESET; - obj->event = EDGE_NONE; - } - } - if (event == IRQ_FALL) { - if ((obj->event == EDGE_RISE) || (obj->event == EDGE_BOTH)) { - mode = STM_MODE_IT_RISING; - obj->event = EDGE_RISE; - } else { // NONE or FALL - mode = STM_MODE_IT_EVT_RESET; - obj->event = EDGE_NONE; - } - } - } - - pin_function(obj->pin, STM_PIN_DATA(mode, pull, 0)); -} - -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; -}