text: /**
   * Copyright (c) 2014 - 2018, Nordic Semiconductor ASA
   * 
   * All rights reserved.
   * 
   * Redistribution and use in source and binary forms, with or without modification,
   * are permitted provided that the following conditions are met:
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   *    list of conditions and the following disclaimer.
   * 
   * 2. Redistributions in binary form, except as embedded into a Nordic
   *    Semiconductor ASA integrated circuit in a product or a software update for
   *    such product, must reproduce the above copyright notice, this list of
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   *    materials provided with the distribution.
   * 
   * 3. Neither the name of Nordic Semiconductor ASA nor the names of its
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   * 
   * 4. This software, with or without modification, must only be used with a
   *    Nordic Semiconductor ASA integrated circuit.
   * 
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   *    engineered, decompiled, modified and/or disassembled.
   * 
   * THIS SOFTWARE IS PROVIDED BY NORDIC SEMICONDUCTOR ASA "AS IS" AND ANY EXPRESS
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   * OF MERCHANTABILITY, NONINFRINGEMENT, AND FITNESS FOR A PARTICULAR PURPOSE ARE
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   */
  
  #ifndef NRF_DRV_SPIS_H__
  #define NRF_DRV_SPIS_H__
  
  #include <nrfx_spis.h>
  
  #ifdef __cplusplus
  extern "C" {
  #endif
  
  /**
   * @defgroup nrf_drv_spis SPIS driver - legacy layer
   * @{
   * @ingroup  nrf_spis
   *
   * @brief    Layer providing compatibility with the former API.
   */
  
  /** @brief Type definition for forwarding the new implementation. */
  typedef nrfx_spis_t         nrf_drv_spis_t;
  /** @brief Type definition for forwarding the new implementation. */
  typedef nrfx_spis_config_t  nrf_drv_spis_config_t;
  /** @brief Type definition for forwarding the new implementation. */
  typedef nrfx_spis_evt_t     nrf_drv_spis_event_t;
  
  /** @brief Macro for forwarding the new implementation. */
  #define NRF_DRV_SPIS_INSTANCE               NRFX_SPIS_INSTANCE
  /** @brief Macro for forwarding the new implementation. */
  #define NRF_DRV_SPIS_DEFAULT_CONFIG         NRFX_SPIS_DEFAULT_CONFIG
  /** @brief Macro for forwarding the new implementation. */
  #define NRF_DRV_SPIS_DEFAULT_CSN_PULLUP     NRFX_SPIS_DEFAULT_CSN_PULLUP
  /** @brief Macro for forwarding the new implementation. */
  #define NRF_DRV_SPIS_DEFAULT_MISO_DRIVE     NRFX_SPIS_DEFAULT_MISO_DRIVE
  /** @brief Macro for forwarding the new implementation. */
  #define NRF_DRV_SPIS_PIN_NOT_USED           NRFX_SPIS_PIN_NOT_USED
  
  /** @brief Macro for providing API backward compatibility. */
  #define NRF_DRV_SPIS_BIT_ORDER_LSB_FIRST    NRF_SPIS_BIT_ORDER_LSB_FIRST
  /** @brief Macro for providing API backward compatibility. */
  #define NRF_DRV_SPIS_BIT_ORDER_MSB_FIRST    NRF_SPIS_BIT_ORDER_MSB_FIRST
  /** @brief Macro for providing API backward compatibility. */
  #define nrf_drv_spis_endian_t               nrf_spis_bit_order_t
  /** @brief Macro for providing API backward compatibility. */
  #define NRF_DRV_SPIS_MODE_0                 NRF_SPIS_MODE_0
  /** @brief Macro for providing API backward compatibility. */
  #define NRF_DRV_SPIS_MODE_1                 NRF_SPIS_MODE_1
  /** @brief Macro for providing API backward compatibility. */
  #define NRF_DRV_SPIS_MODE_2                 NRF_SPIS_MODE_2
  /** @brief Macro for providing API backward compatibility. */
  #define NRF_DRV_SPIS_MODE_3                 NRF_SPIS_MODE_3
  /** @brief Macro for providing API backward compatibility. */
  #define nrf_drv_spis_mode_t                 nrf_spis_mode_t
  /** @brief Macro for forwarding the new implementation. */
  #define NRF_DRV_SPIS_BUFFERS_SET_DONE       NRFX_SPIS_BUFFERS_SET_DONE
  /** @brief Macro for forwarding the new implementation. */
  #define NRF_DRV_SPIS_XFER_DONE              NRFX_SPIS_XFER_DONE
  /** @brief Macro for forwarding the new implementation. */
  #define NRF_DRV_SPIS_EVT_TYPE_MAX           NRFX_SPIS_EVT_TYPE_MAX
  /** @brief Macro for forwarding the new implementation. */
  #define nrf_drv_spis_event_type_t           nrfx_spis_evt_type_t
  
  /** @brief Macro for forwarding the new implementation. */
  #define nrf_drv_spis_uninit                 nrfx_spis_uninit
  /** @brief Macro for forwarding the new implementation. */
  #define nrf_drv_spis_buffers_set            nrfx_spis_buffers_set
  
  /** @brief SPI slave event callback function type.
   *
   * @param[in] event                 SPI slave driver event.
   */
  typedef void (*nrf_drv_spis_event_handler_t)(nrf_drv_spis_event_t event);
  
  /** @brief Function for initializing the SPI slave driver instance.
   *
   * @note When the nRF52 Anomaly 109 workaround for SPIS is enabled, this function
   *       initializes the GPIOTE driver as well, and uses one of GPIOTE channels
   *       to detect falling edges on CSN pin.
   *
   * @param[in] p_instance    Pointer to the driver instance structure.
   * @param[in] p_config      Pointer to the structure with the initial configuration.
   *                          If NULL, the default configuration will be used.
   * @param[in] event_handler Function to be called by the SPI slave driver upon event.
   *
   * @retval NRF_SUCCESS             If the initialization was successful.
   * @retval NRF_ERROR_INVALID_PARAM If an invalid parameter is supplied.
   * @retval NRFX_ERROR_INVALID_STATE If the instance is already initialized.
   * @retval NRF_ERROR_BUSY          If some other peripheral with the same
   *                                 instance ID is already in use. This is
   *                                 possible only if PERIPHERAL_RESOURCE_SHARING_ENABLED
   *                                 is set to a value other than zero.
   * @retval NRF_ERROR_INTERNAL      GPIOTE channel for detecting falling edges
   *                                 on CSN pin cannot be initialized. Possible
   *                                 only when using nRF52 Anomaly 109 workaround.
   */
  ret_code_t nrf_drv_spis_init(nrf_drv_spis_t const * const  p_instance,
                               nrf_drv_spis_config_t const * p_config,
                               nrf_drv_spis_event_handler_t  event_handler);
  
  /** @} */
  
  #ifdef __cplusplus
  }
  #endif
  
  #endif // NRF_DRV_SPIS_H__
  