mirror of https://github.com/ARMmbed/mbed-os.git
102 lines
2.7 KiB
C
102 lines
2.7 KiB
C
/****************************************************************************
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*
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* Copyright 2020 Samsung Electronics All Rights Reserved.
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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,
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* software distributed under the License is distributed on an
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* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND,
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* either express or implied. See the License for the specific
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* language governing permissions and limitations under the License.
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*
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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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#include "cmsis.h"
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void gpio_init(gpio_t *obj, PinName pin)
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{
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obj->pin = pin;
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if (pin == (PinName)NC) {
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return;
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}
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uint32_t port = BP6A_PORT_IDX(obj->pin);
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uint32_t mask = 1 << pin;
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uint8_t pin_n = BP6A_PIN_IDX(pin);
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bp6a_set_pin_config(port, pin_n, (PIN_INPUT | PIN_OUTPUT));
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BP_GPIO_TypeDef *gpio_base = (BP_GPIO_TypeDef *)GPIO_PORT_BASE(port);
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putreg32(&(gpio_base->ALTFUNCCLR), mask);
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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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bp6a_gpio_set_dir(BP6A_PORT_IDX(obj->pin), BP6A_PIN_IDX(obj->pin), (PIN_INPUT == direction));
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}
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void gpio_write(gpio_t *obj, int value)
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{
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if (obj->pin == (PinName)NC) {
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return;
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}
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uint32_t port = BP6A_PORT_IDX(obj->pin);
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uint32_t mask = 1 << BP6A_PIN_IDX(obj->pin);
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BP_GPIO_TypeDef *gpio_base = (BP_GPIO_TypeDef *)GPIO_PORT_BASE(port);
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modifyreg32(&(gpio_base->DATAOUT), mask, (value > 0) ? mask : 0);
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}
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int gpio_read(gpio_t *obj)
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{
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if (obj->pin == (PinName)NC) {
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return 0;
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}
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uint32_t port = BP6A_PORT_IDX(obj->pin);
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uint32_t pin_n = BP6A_PIN_IDX(obj->pin);
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BP_GPIO_TypeDef *gpio_base = (BP_GPIO_TypeDef *)GPIO_PORT_BASE(port);
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return (getreg32(&(gpio_base->DATA)) >> pin_n) & 0x01;
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}
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uint32_t gpio_set(PinName pin)
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{
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uint32_t port = BP6A_PORT_IDX(pin);
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uint32_t pin_n = BP6A_PIN_IDX(pin);
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bp6a_gpio_set_dir(port, pin_n, true);
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return (1u << (uint32_t) pin);
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}
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int gpio_is_connected(const gpio_t *obj)
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{
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if (obj->pin == (PinName) NC) {
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return 0;
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}
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uint32_t port = BP6A_PORT_IDX(obj->pin);
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uint32_t pin_n = BP6A_PIN_IDX(obj->pin);
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BP_GPIO_TypeDef *gpio_base = (BP_GPIO_TypeDef *)GPIO_PORT_BASE(port);
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return !(getreg32(&(gpio_base->ALTFUNCSET)) >> pin_n);
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}
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