SPIDMXWidget.h

/*
 * 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 Library 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.
 *
 * SPIDMXWidget.h
 * This is a wrapper around the required SPIDEV calls.
 * Copyright (C) 2017 Florian Edelmann
 */

#ifndef PLUGINS_SPIDMX_SPIDMXWIDGET_H_
#define PLUGINS_SPIDMX_SPIDMXWIDGET_H_

#include <linux/spi/spidev.h>
#include <string>
#include <vector>

#include "ola/base/Macro.h"
#include "ola/DmxBuffer.h"

namespace ola {
namespace plugin {
namespace spidmx {

class SPIDMXWidget {
 public:
  explicit SPIDMXWidget(const std::string &path);

  ~SPIDMXWidget();

  std::string Name() const { return m_path; }
  std::string Description() const { return m_path; }

  bool Open();

  bool Close();

  bool IsOpen() const;

  bool ReadWrite(uint8_t *tx_buf, uint8_t *rx_buf, uint32_t blocklength);

  bool SetupOutput();

 private:
  const std::string m_path;

  int m_fd;

  static const int NOT_OPEN = -2;

  static const int FAILED_OPEN = -1;

  static const uint32_t SPI_SPEED = 2000000;

  static const uint16_t SPI_DELAY = 0;

  static const uint8_t SPI_BITS_PER_WORD = 8;

  static const uint8_t SPI_CS_CHANGE = 0;

  static const uint16_t SPI_PAD = 0;

  static const uint8_t SPI_MODE = SPI_MODE_0;

  DISALLOW_COPY_AND_ASSIGN(SPIDMXWidget);
};

}  // namespace spidmx
}  // namespace plugin
}  // namespace ola
#endif  // PLUGINS_SPIDMX_SPIDMXWIDGET_H_