mirror of https://github.com/ARMmbed/mbed-os.git
102 lines
2.9 KiB
C
102 lines
2.9 KiB
C
/*
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* mbed Microcontroller Library
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* Copyright (c) 2017-2018 Future Electronics
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* Copyright (c) 2019, Arm Limited and affiliates.
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* SPDX-License-Identifier: Apache-2.0
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include "mbed_assert.h"
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#include "mbed_error.h"
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#include "PinNames.h"
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#include "cyhal_gpio.h"
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#include "cyhal_hwmgr.h"
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#include "cy_gpio.h"
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#include "gpio_irq_api.h"
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#define GPIO_DEFAULT_IRQ_PRIORITY 5
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#ifdef __cplusplus
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extern "C" {
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#endif
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void cy_gpio_irq_handler_impl(void *handler_arg, cyhal_gpio_irq_event_t event)
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{
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gpio_irq_t *obj = (gpio_irq_t *)handler_arg;
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cyhal_gpio_irq_event_t masked = (cyhal_gpio_irq_event_t)(event & obj->mask);
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void (*handler)(uint32_t, int) = (void (*)(uint32_t, int))obj->handler;
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if (NULL != handler && CYHAL_GPIO_IRQ_NONE != masked) {
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if (CYHAL_GPIO_IRQ_NONE != (masked & CYHAL_GPIO_IRQ_RISE)) {
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(*handler)(obj->id, IRQ_RISE);
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}
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if (CYHAL_GPIO_IRQ_NONE != (masked & CYHAL_GPIO_IRQ_FALL)) {
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(*handler)(obj->id, IRQ_FALL);
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}
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}
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}
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int gpio_irq_init(gpio_irq_t *obj, PinName pin, gpio_irq_handler handler, uint32_t id)
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{
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obj->pin = pin;
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obj->handler = (void *)handler;
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obj->id = id;
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obj->mask = CYHAL_GPIO_IRQ_NONE;
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if (pin != NC) {
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gpio_irq_enable(obj); // InterruptIn expects IRQ to be initially enabled
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}
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return pin != NC ? 0 : -1;
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}
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void gpio_irq_free(gpio_irq_t *obj)
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{
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if (obj->pin != NC) {
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gpio_irq_disable(obj);
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cyhal_gpio_irq_enable(obj->pin, CYHAL_GPIO_IRQ_BOTH, false);
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}
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obj->pin = NC;
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obj->handler = NULL;
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obj->id = 0;
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obj->mask = CYHAL_GPIO_IRQ_NONE;
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}
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void gpio_irq_set(gpio_irq_t *obj, gpio_irq_event event, uint32_t enable)
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{
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cyhal_gpio_irq_event_t bits;
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if (event == IRQ_RISE) {
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bits = CYHAL_GPIO_IRQ_RISE;
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} else if (event == IRQ_FALL) {
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bits = CYHAL_GPIO_IRQ_FALL;
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} else {
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bits = CYHAL_GPIO_IRQ_NONE;
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}
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obj->mask = (cyhal_gpio_irq_event_t)(enable ? (obj->mask | bits) : (obj->mask & ~bits));
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cyhal_gpio_irq_enable(obj->pin, obj->mask, true);
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}
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void gpio_irq_enable(gpio_irq_t *obj)
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{
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MBED_ASSERT(obj->pin != NC);
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cyhal_gpio_register_irq(obj->pin, GPIO_DEFAULT_IRQ_PRIORITY, &cy_gpio_irq_handler_impl, obj);
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}
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void gpio_irq_disable(gpio_irq_t *obj)
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{
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MBED_ASSERT(obj->pin != NC);
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cyhal_gpio_register_irq(obj->pin, GPIO_DEFAULT_IRQ_PRIORITY, NULL, NULL);
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}
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#ifdef __cplusplus
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}
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#endif
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