mirror of https://github.com/ARMmbed/mbed-os.git
81 lines
2.1 KiB
C
81 lines
2.1 KiB
C
/* mbed Microcontroller Library
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* Copyright (c) 2016 u-blox
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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 "gpio_api.h"
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#include "pinmap.h"
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/* ----------------------------------------------------------------
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* MACROS
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* ----------------------------------------------------------------*/
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/* ----------------------------------------------------------------
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* TYPES
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* ----------------------------------------------------------------*/
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/* ----------------------------------------------------------------
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* GLOBAL VARIABLES
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* ----------------------------------------------------------------*/
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/* ----------------------------------------------------------------
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* MBED API CALLS
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* ----------------------------------------------------------------*/
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void gpio_init(gpio_t *obj, PinName pin)
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{
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if (pin == (PinName)NC) {
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return;
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}
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MBED_ASSERT (pin < NUM_PINS);
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obj->pin = pin;
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obj->mask = (1ul << pin);
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obj->reg_set = &GPIO_OUT_BITSET;
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obj->reg_clr = &GPIO_OUT_BITCLR;
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obj->reg_val = &GPIO_VALUE;
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obj->reg_dir = &GPIO_DIR;
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/* Claim the pin */
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pin_function(pin, PIN_FUNCTION_GPIO);
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}
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void gpio_mode(gpio_t *obj, PinMode mode)
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{
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pin_mode(obj->pin, mode);
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}
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void gpio_dir(gpio_t *obj, PinDirection direction)
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{
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MBED_ASSERT(obj->pin != (PinName)NC);
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switch (direction) {
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case PIN_INPUT:
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{
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*(obj->reg_dir) &= ~(obj->mask);
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}
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break;
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case PIN_OUTPUT:
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{
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*(obj->reg_dir) |= obj->mask;
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}
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break;
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/* TODO: looks as though the default is
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* not normally trapped here */
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}
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}
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