nlgpio16.h

/*
 * Author: Jon Trulson <jtrulson@ics.com>
 * Copyright (c) 2015 Intel Corporation.
 *
 * Thanks to Adafruit for supplying a google translated version of the
 * Chinese datasheet and some clues in their code.
 *
 * 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.
 */
#pragma once

#include <string>
#include <iostream>

#include <stdlib.h>
#include <unistd.h>
#include <string.h>

#include <mraa/common.hpp>
#include <mraa/uart.hpp>

#define NLGPIO16_DEFAULT_UART_DEV "/dev/ttyACM0"

// ADC analog ref voltage is 3.3v
#define ADC_AREF 3.3

// 10-bit precision (0-1023)
#define ADC_PRECISION 10

namespace upm {
  class NLGPIO16 {
  public:

    NLGPIO16(std::string uart=NLGPIO16_DEFAULT_UART_DEV);

    ~NLGPIO16();

    std::string getVersion();

    std::string getID();

    void setID(std::string id);

    void gpioSet(int gpio);

    void gpioClear(int gpio);

    bool gpioRead(int gpio);

    unsigned int gpioReadAll();

    void gpioSetIOMask(int mask);

    void gpioSetIODir(int mask);

    void gpioWriteAll(int mask);

    int analogReadValue(int adc);

    float analogReadVolts(int adc);


  protected:
    mraa::Uart m_uart;

    // UART helpers
    bool dataAvailable(unsigned int millis);
    std::string readStr(int len);
    int writeStr(std::string data);

    // does most of the work for sending commands and getting responses
    std::string sendCommand(std::string cmd);

  private:
  };
}