AMiRo-OS

/*

 * pca9544.hpp

 *

 *  Created on: Jun 6, 2014

 *      Author: Robert ABEL

 */

#ifndef AMIRO_PCA9544_HPP_

#define AMIRO_PCA9544_HPP_

#include <ch.hpp>

#include <hal.h>

#include <amiro/bus/i2c/I2CParams.hpp>

#include <amiro/bus/i2c/I2CMultiplexer.hpp>

/**

 * @brief   AMiRo

 */

namespace amiro {

  class I2CDriver;

  /**

   * @brief   Input/Output driver class

   */

  template <bool ignore_deselect>

  class PCA9544 : public I2CMultiplexer {

    enum { SLA = 0x70u };

    enum { BUS_OFF = 0x00u, BUS_ON = 0x04u };

  public:

    PCA9544(I2CDriver *driver, const uint8_t master_id);

    virtual ~PCA9544() {}

    virtual msg_t select(const uint8_t bus_id);

    virtual msg_t deselect();

    uint8_t getInterruptSource();

    /**

     * Return types of getCheck()

     */

    enum {

      CHECK_OK   = 0x00u,

      CHECK_FAIL = 0x01u,

    };

    /**

     * Checks the multiplexer by writing all possible bit

     * combinations into the MUX register and directly

     * reading from it.

     * TODO Check possible register write corruption if vcnl4020 is running in parallel

     *

     * @return [CHECK_OK | CHECK_FAIL]

     */

    uint8_t getCheck(void);

  private:

    uint8_t master_id;

    I2CTxParams tx_params;

    I2CRxParams rx_params;

    uint8_t selected;

  };

} /* amiro */

#include <components/bus/i2c/mux/pca9544.tpp>

#endif /* AMIRO_PCA9544_HPP_ */