100 lines
2.3 KiB
C
100 lines
2.3 KiB
C
/*
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* File : gpio.c
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* This file is part of RT-Thread RTOS
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* COPYRIGHT (C) 2006 - 2017, RT-Thread Development Team
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Change Logs:
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* Date Author Notes
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* 2017-09-16 Haley the first version
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*/
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#include <rtthread.h>
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#include <rtdevice.h>
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#include "am_mcu_apollo.h"
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#ifdef RT_USING_PIN
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void am_pin_mode(rt_device_t dev, rt_base_t pin, rt_base_t mode)
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{
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if (mode == PIN_MODE_OUTPUT)
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{
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/* output setting */
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am_hal_gpio_pin_config(pin, AM_HAL_GPIO_OUTPUT);
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}
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else if (mode == PIN_MODE_INPUT)
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{
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/* input setting: not pull. */
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am_hal_gpio_pin_config(pin, AM_HAL_GPIO_INPUT);
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}
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else if (mode == PIN_MODE_INPUT_PULLUP)
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{
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/* input setting: pull up. */
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am_hal_gpio_pin_config(pin, AM_HAL_GPIO_OPENDRAIN);
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}
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else
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{
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/* input setting:default. */
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am_hal_gpio_pin_config(pin, AM_HAL_GPIO_INPUT);
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}
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}
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void am_pin_write(rt_device_t dev, rt_base_t pin, rt_base_t value)
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{
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if (value == PIN_LOW)
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{
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am_hal_gpio_out_bit_clear(pin);
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}
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else
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{
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am_hal_gpio_out_bit_set(pin);
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}
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}
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int am_pin_read(rt_device_t dev, rt_base_t pin)
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{
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int value = PIN_LOW;
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if (am_hal_gpio_input_bit_read(pin) == 0)
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{
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value = PIN_LOW;
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}
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else
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{
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value = PIN_HIGH;
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}
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return value;
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}
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const static struct rt_pin_ops _am_pin_ops =
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{
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am_pin_mode,
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am_pin_write,
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am_pin_read,
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};
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int hw_pin_init(void)
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{
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rt_device_pin_register("pin", &_am_pin_ops, RT_NULL);
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return 0;
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}
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INIT_BOARD_EXPORT(hw_pin_init);
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#endif
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/*@}*/
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