// Copyright (c) 2014 Adafruit Industries

// Author: Tony DiCola

// Permission is hereby granted, free of charge, to any person obtaining a copy

// of this software and associated documentation files (the "Software"), to deal

// in the Software without restriction, including without limitation the rights

// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell

// copies of the Software, and to permit persons to whom the Software is

// furnished to do so, subject to the following conditions:

// The above copyright notice and this permission notice shall be included in all

// copies or substantial portions of the Software.

// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR

// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,

// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE

// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER

// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,

// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE

// SOFTWARE.

#ifndef COMMON_DHT_READ_H

#define COMMON_DHT_READ_H

#include <stdint.h>

// Define errors and return values.

#define DHT_ERROR_TIMEOUT -1

#define DHT_ERROR_CHECKSUM -2

#define DHT_ERROR_ARGUMENT -3

#define DHT_ERROR_GPIO -4

#define DHT_SUCCESS 0

// Define sensor types.

#define DHT11 11

#define DHT22 22

#define AM2302 22

// Busy wait delay for most accurate timing, but high CPU usage.

// Only use this for short periods of time (a few hundred milliseconds at most)!

void busy_wait_milliseconds(uint32_t millis);

// General delay that sleeps so CPU usage is low, but accuracy is potentially bad.

void sleep_milliseconds(uint32_t millis);

// Increase scheduling priority and algorithm to try to get 'real time' results.

void set_max_priority(void);

// Drop scheduling priority back to normal/default.

void set_default_priority(void);

#endif