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amiro-os / include / amiro / bus / i2c / mux / pca9544.hpp @ 58fe0e0b

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/*
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 * pca9544.hpp
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 *
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 *  Created on: Jun 6, 2014
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 *      Author: Robert ABEL
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 */
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#ifndef AMIRO_PCA9544_HPP_
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#define AMIRO_PCA9544_HPP_
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#include <ch.hpp>
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#include <hal.h>
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#include <amiro/bus/i2c/I2CParams.hpp>
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#include <amiro/bus/i2c/I2CMultiplexer.hpp>
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/**
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 * @brief   AMiRo
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 */
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namespace amiro {
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  class I2CDriver;
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  /**
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   * @brief   Input/Output driver class
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   */
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  template <bool ignore_deselect>
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  class PCA9544 : public I2CMultiplexer {
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    enum { SLA = 0x70u };
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    enum { BUS_OFF = 0x00u, BUS_ON = 0x04u };
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  public:
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    PCA9544(I2CDriver *driver, const uint8_t master_id);
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    virtual ~PCA9544() {}
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    virtual msg_t select(const uint8_t bus_id);
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    virtual msg_t deselect();
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    uint8_t getInterruptSource();
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    /**
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     * Return types of getCheck()
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     */
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    enum {
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      CHECK_OK   = 0x00u,
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      CHECK_FAIL = 0x01u,
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    };
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    /**
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     * Checks the multiplexer by writing all possible bit
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     * combinations into the MUX register and directly
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     * reading from it.
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     * TODO Check possible register write corruption if vcnl4020 is running in parallel
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     *
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     * @return [CHECK_OK | CHECK_FAIL]
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     */
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    uint8_t getCheck(void);
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  private:
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    uint8_t master_id;
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    I2CTxParams tx_params;
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    I2CRxParams rx_params;
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    uint8_t selected;
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  };
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} /* amiro */
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#include <components/bus/i2c/mux/pca9544.tpp>
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#endif /* AMIRO_PCA9544_HPP_ */