text: /*
   * Copyright (c) 2018 Samsung Electronics Co., Ltd.
   *
   * 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 "wiring_digital.h"
  
  #include "log.h"
  
  static peripheral_gpio_h g_sensor_h = NULL;
  static int g_pin_num = -1;
  
  void gpio_close(void)
  {
  	if (!g_sensor_h) return;
  
  	_I("gpio closing...");
  
  	peripheral_gpio_close(g_sensor_h);
  
  	g_sensor_h = NULL;
  	g_pin_num = -1;
  }
  
  int digitalWrite(int pin_num, int write_value)
  {
  	int ret = PERIPHERAL_ERROR_NONE;
  
  	if (!g_sensor_h) {
  		peripheral_gpio_h temp = NULL;
  
  		ret = peripheral_gpio_open(pin_num, &temp);
  		retv_if(ret, -1);
  
  		ret = peripheral_gpio_set_direction(temp, PERIPHERAL_GPIO_DIRECTION_OUT_INITIALLY_LOW);
  		if (ret) {
  			peripheral_gpio_close(temp);
  			_E("peripheral_gpio_set_direction failed.");
  			return -1;
  		}
  
  		g_sensor_h = temp;
  		g_pin_num = pin_num;
  	}
  
  	if (g_pin_num != pin_num) {
  		_E("Invalid pin number.");
  		return -1;
  	}
  
  	ret = peripheral_gpio_write(g_sensor_h, write_value);
  	retv_if(ret < 0, -1);
  
  	_I("GPIO Value : %s", write_value ? "HIGH":"LOW");
  
  	return 0;
  }
  
  int digitalRead(int pin_num)
  {
  	int ret = PERIPHERAL_ERROR_NONE;
  	int read_value = 0;
  
  	if (!g_sensor_h) {
  		peripheral_gpio_h temp = NULL;
  
  		ret = peripheral_gpio_open(pin_num, &temp);
  		retv_if(ret, -1);
  
  		ret = peripheral_gpio_set_direction(temp, PERIPHERAL_GPIO_DIRECTION_IN);
  		if (ret) {
  			peripheral_gpio_close(temp);
  			_E("peripheral_gpio_set_direction failed.");
  			return -1;
  		}
  
  		g_sensor_h = temp;
  		g_pin_num = pin_num;
  	}
  
  	if (g_pin_num != pin_num) {
  		_E("Invalid pin number.");
  		return -1;
  	}
  
  	ret = peripheral_gpio_read(g_sensor_h, &read_value);
  	retv_if(ret < 0, -1);
  
  	_I("GPIO Value : %s", read_value ? "HIGH":"LOW");
  
  	return read_value;
  }
  
  int pinMode(int pin_num, int mode)
  {
  	int ret = PERIPHERAL_ERROR_NONE;
  
  	if (!g_sensor_h) {
  		peripheral_gpio_h temp = NULL;
  
  		ret = peripheral_gpio_open(pin_num, &temp);
  		retv_if(ret, -1);
  
  		ret = peripheral_gpio_set_direction(temp, mode);
  		if (ret) {
  			peripheral_gpio_close(temp);
  			_E("peripheral_gpio_set_direction failed.");
  			return -1;
  		}
  
  		g_sensor_h = temp;
  		g_pin_num = pin_num;
  	}
  
  	if (g_pin_num != pin_num) {
  		_E("Invalid pin number.");
  		return -1;
  	}
  	return 0;
  }
  