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#ifndef PHY_PLME_CCA_H_INCLUDED
#define PHY_PLME_CCA_H_INCLUDED

#include <stdint.h>
#include "phy_common.h"

/** @file
 * This file contains declarations of Clear Channel Assessment PHY routines and necessary types.
 *
 * @defgroup phy_cca PHY CCA API
 * @ingroup phy_15_4
 * @{
 * @brief Module to declare PHY Clear Channel Assessment API
 * @details The PHY CCA module declares Clear Channel Assessment PHY routines and necessary types according to
 * the PHY specification. More specifically, PHY CCA request plme_cca_req(), PHY CCA confirm 
 * plme_cca_conf() primitives are declared. An additional primitive not covered by the standard is declared.
 * This is plme_cca() which is a synchronous version of plme_cca_req().
 */

/**@brief   PLME-CCA.confirm parameters
 *
 * @details The PLME-CCA.confirm primitive is generated by
 *          the initiating PLME and issued to its next higher layer
 *          in response to an PLME-CCA.request primitive.
 *          In accordance with IEEE Std 802.15.4-2006, section 6.2.2.2.1
 */
typedef struct
{
    /** One of PHY_TRX_OFF, PHY_BUSY or PHY_IDLE. */
    phy_enum_t status;
} plme_cca_conf_t;


/**@brief   PLME-CCA.request
 *
 * @details Request for clear channel assessment.
 *          In accordance with IEEE Std 802.15.4-2006, section 6.2.2.1
 */
void plme_cca_req(void);


/**@brief   PLME-CCA.confirm callback function, implemented by the next higher layer.
 *
 * @details The PLME-CCA.confirm primitive is generated by the PLME and issued
 *          to its next higher layer in response to an PLME-CCA.request primitive.
 *          In accordance with IEEE Std 802.15.4-2006, section 6.2.2.2
 *
 * @param[out] conf    Pointer to PLME-CCA.confirm parameters
 */
void plme_cca_conf(plme_cca_conf_t * conf);


/**@brief   Direct (synchronous) PLME-CCA.request
 *
 * @details Optional. Not covered by a standard.
 *
 * @return  One of PHY_TRX_OFF, PHY_BUSY or PHY_IDLE,
 *          or implementation defined error code in case of
 *          unavailability of access to system resources.
 */
phy_enum_t plme_cca(void);

/** @} */

#endif // PHY_PLME_CCA_H_INCLUDED
