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