hal_spi_v2_lld.h

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/*
    ChibiOS - Copyright (C) 2006..2018 Giovanni Di Sirio
 
    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_v2_lld.h
 * @brief   PLATFORM SPI (v2) subsystem low level driver header.
 *
 * @addtogroup SPI_V2
 * @{
 */
 
#ifndef HAL_SPI_V2_LLD_H
#define HAL_SPI_V2_LLD_H
 
#if HAL_USE_SPI || defined(__DOXYGEN__)
 
/*===========================================================================*/
/* Driver constants.                                                         */
/*===========================================================================*/
 
/**
 * @brief   Circular mode support flag.
 */
#define SPI_SUPPORTS_CIRCULAR           TRUE
 
/**
 * @brief   Slave mode support flag.
 */
#define SPI_SUPPORTS_SLAVE_MODE         TRUE
 
/*===========================================================================*/
/* Driver pre-compile time settings.                                         */
/*===========================================================================*/
 
/**
 * @name    PLATFORM configuration options
 * @{
 */
/**
 * @brief   SPI1 driver enable switch.
 * @details If set to @p TRUE the support for SPI1 is included.
 * @note    The default is @p FALSE.
 */
#if !defined(PLATFORM_SPI_USE_SPI1) || defined(__DOXYGEN__)
#define PLATFORM_SPI_USE_SPI1                  FALSE
#endif
/** @} */
 
/*===========================================================================*/
/* Derived constants and error checks.                                       */
/*===========================================================================*/
 
/*===========================================================================*/
/* Driver data structures and types.                                         */
/*===========================================================================*/
 
/*===========================================================================*/
/* Driver macros.                                                            */
/*===========================================================================*/
 
/**
 * @brief   Low level fields of the SPI driver structure.
 */
#define spi_lld_driver_fields                                               \
  /* Dummy field, it is not needed.*/                                       \
  uint32_t                  dummy;
 
/**
 * @brief   Low level fields of the SPI configuration structure.
 */
#define spi_lld_config_fields                                               \
  /* Dummy configuration, it is not needed.*/                               \
  uint32_t                  dummy;
 
/*===========================================================================*/
/* External declarations.                                                    */
/*===========================================================================*/
 
#if (PLATFORM_SPI_USE_SPI1 == TRUE) && !defined(__DOXYGEN__)
extern SPIDriver SPID1;
#endif
 
#ifdef __cplusplus
extern "C" {
#endif
  void spi_lld_init(void);
  msg_t spi_lld_start(SPIDriver *spip);
  void spi_lld_stop(SPIDriver *spip);
#if (SPI_SELECT_MODE == SPI_SELECT_MODE_LLD) || defined(__DOXYGEN__)
  void spi_lld_select(SPIDriver *spip);
  void spi_lld_unselect(SPIDriver *spip);
#endif
  msg_t spi_lld_ignore(SPIDriver *spip, size_t n);
  msg_t spi_lld_exchange(SPIDriver *spip, size_t n,
                         const void *txbuf, void *rxbuf);
  msg_t spi_lld_send(SPIDriver *spip, size_t n, const void *txbuf);
  msg_t spi_lld_receive(SPIDriver *spip, size_t n, void *rxbuf);
  msg_t spi_lld_stop_transfer(SPIDriver *spip, size_t *sizep);
  uint16_t spi_lld_polled_exchange(SPIDriver *spip, uint16_t frame);
#ifdef __cplusplus
}
#endif
 
#endif /* HAL_USE_SPI */
 
#endif /* HAL_SPI_V2_LLD_H */
 
/** @} */