/* mbed Microcontroller Library * Copyright (c) 2006-2013 ARM Limited * SPDX-License-Identifier: Apache-2.0 * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ #include "mbed_assert.h" #include "gpio_api.h" #include "pinmap.h" #include "fsl_gpio.h" static GPIO_Type * const gpio_addrs[] = GPIO_BASE_PTRS; uint32_t gpio_set(PinName pin) { MBED_ASSERT(pin != (PinName)NC); uint32_t pin_num = pin & 0xFF; pin_function(pin, GPIO_MUX_PORT); return 1 << pin_num; } void gpio_init(gpio_t *obj, PinName pin) { clock_ip_name_t gpio_clocks[] = GPIO_CLOCKS; obj->pin = pin; if (pin == (PinName)NC) return; CLOCK_EnableClock(gpio_clocks[pin >> GPIO_PORT_SHIFT]); pin_function(pin, GPIO_MUX_PORT); } void gpio_mode(gpio_t *obj, PinMode mode) { pin_mode(obj->pin, mode); } void gpio_dir(gpio_t *obj, PinDirection direction) { MBED_ASSERT(obj->pin != (PinName)NC); uint32_t port = (obj->pin >> GPIO_PORT_SHIFT) & 0xF; uint32_t gpio_pin_num = obj->pin & 0xFF; GPIO_Type *base = gpio_addrs[port]; switch (direction) { case PIN_INPUT: base->GDIR &= ~(1U << gpio_pin_num); break; case PIN_OUTPUT: base->GDIR |= (1U << gpio_pin_num); break; } } void gpio_write(gpio_t *obj, int value) { MBED_ASSERT(obj->pin != (PinName)NC); uint32_t port = (obj->pin >> GPIO_PORT_SHIFT) & 0xF; uint32_t gpio_pin_num = obj->pin & 0xFF; GPIO_WritePinOutput(gpio_addrs[port], gpio_pin_num, value); } int gpio_read(gpio_t *obj) { MBED_ASSERT(obj->pin != (PinName)NC); uint32_t port = (obj->pin >> GPIO_PORT_SHIFT) & 0xF; uint32_t gpio_pin_num = obj->pin & 0xFF; return (int)GPIO_ReadPinInput(gpio_addrs[port], gpio_pin_num); }