/*
    Copyright (C) 2020 Yaotian Feng


    Licensed under the Apache License, Version 2.0 (the "License");
    you may not use this file except in compliance with the License.
    You may obtain a copy of the License at

        http://www.apache.org/licenses/LICENSE-2.0

    Unless required by applicable law or agreed to in writing, software
    distributed under the License is distributed on an "AS IS" BASIS,
    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    See the License for the specific language governing permissions and
    limitations under the License.
*/

/**
 * @file    hal_spi_lld.h
 * @brief   HT32 SPI subsystem low level driver header.
 *
 * @addtogroup SPI
 * @{
 */
#ifndef HAL_SPI_LLD_H
#define HAL_SPI_LLD_H

#if HAL_USE_SPI || defined(__DOXYGEN__)

/*===========================================================================*/
/* Driver constants.                                                         */
/*===========================================================================*/

/*===========================================================================*/
/* Driver pre-compile time settings.                                         */
/*===========================================================================*/

/**
 * @name    HT32 configuration options
 * @{
 */
/**
 * @brief   SPI0 driver enable switch.
 * @details If set to @p TRUE the support for SPI0 is included.
 * @note    The default is @p FALSE.
 */
#if !defined(HT32_SPI_USE_SPI0) || defined(__DOXYGEN__)
#define HT32_SPI_USE_SPI0                  FALSE
#endif
#if !defined(HT32_SPI_USE_SPI1) || defined(__DOXYGEN__)
#define HT32_SPI_USE_SPI1                  FALSE
#endif
/** @} */

/*===========================================================================*/
/* Derived constants and error checks.                                       */
/*===========================================================================*/

/*===========================================================================*/
/* Driver data structures and types.                                         */
/*===========================================================================*/


/**
 * @brief Low Level fields of the SPI driver structure.
 */
#define spi_lld_driver_fields                                                  \
  SPI_TypeDef               *SPI;                                              \
  uint8_t                   *rxptr;                                            \
  const uint8_t             *txptr;                                            \
  size_t                    rxcnt;                                             \
  size_t                    txcnt;                                             \

/**
 * @brief Low Level fields of the SPI configuration structure.
 */
#define spi_lld_config_fields                                                  \
    uint32_t                  cr0;                                             \
    uint32_t                  cr1;                                             \
    uint32_t                  cpr;                                             \
    uint32_t                  fcr;

/*===========================================================================*/
/* Driver macros.                                                            */
/*===========================================================================*/

/*===========================================================================*/
/* External declarations.                                                    */
/*===========================================================================*/

#if (HT32_SPI_USE_SPI0 == TRUE) && !defined(__DOXYGEN__)
extern SPIDriver SPID0;
#endif
#if (HT32_SPI_USE_SPI1 == TRUE) && !defined(__DOXYGEN__)
extern SPIDriver SPID1;
#endif

#ifdef __cplusplus
extern "C" {
#endif
  void spi_lld_init(void);
  void spi_lld_start(SPIDriver *spip);
  void spi_lld_stop(SPIDriver *spip);
  void spi_lld_select(SPIDriver *spip);
  void spi_lld_unselect(SPIDriver *spip);
  void spi_lld_ignore(SPIDriver *spip, size_t n);
  void spi_lld_exchange(SPIDriver *spip, size_t n,
                        const void *txbuf, void *rxbuf);
  void spi_lld_send(SPIDriver *spip, size_t n, const void *txbuf);
  void spi_lld_receive(SPIDriver *spip, size_t n, void *rxbuf);
  uint16_t spi_lld_polled_exchange(SPIDriver *spip, uint16_t frame);
#ifdef __cplusplus
}
#endif

#endif /* HAL_USE_SPI == TRUE */

#endif /* HAL_SPI_LLD_H */

/** @} */