tinySA/os/hal/platforms/SPC5xx/ESCI_v1/serial_lld.h

/*
 * Licensed under ST Liberty SW License Agreement V2, (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.st.com/software_license_agreement_liberty_v2
 *
 * 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    SPC5xx/ESCI_v1/serial_lld.c
 * @brief   SPC5xx low level serial driver code.
 *
 * @addtogroup SERIAL
 * @{
 */

#ifndef _SERIAL_LLD_H_
#define _SERIAL_LLD_H_

#if HAL_USE_SERIAL || defined(__DOXYGEN__)

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

/**
 * @name    Serial port modes
 * @{
 */
#define SD_MODE_PARITY_MASK     0x03        /**< @brief Parity field mask.  */
#define SD_MODE_PARITY_NONE     0x00        /**< @brief No parity.          */
#define SD_MODE_PARITY_EVEN     0x01        /**< @brief Even parity.        */
#define SD_MODE_PARITY_ODD      0x02        /**< @brief Odd parity.         */

#define SD_MODE_NORMAL          0x00        /**< @brief Normal operations.  */
#define SD_MODE_LOOPBACK        0x80        /**< @brief Internal loopback.  */
/** @} */

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

/**
 * @brief   eSCI-A driver enable switch.
 * @details If set to @p TRUE the support for eSCI-A is included.
 * @note    The default is @p TRUE.
 */
#if !defined(SPC_USE_ESCIA) || defined(__DOXYGEN__)
#define SPC_USE_ESCIA                       TRUE
#endif

/**
 * @brief   eSCI-B driver enable switch.
 * @details If set to @p TRUE the support for eSCI-B is included.
 * @note    The default is @p TRUE.
 */
#if !defined(SPC_USE_ESCIB) || defined(__DOXYGEN__)
#define SPC_USE_ESCIB                       TRUE
#endif

/**
 * @brief   eSCI-A interrupt priority level setting.
 */
#if !defined(SPC_ESCIA_PRIORITY) || defined(__DOXYGEN__)
#define SPC_ESCIA_PRIORITY                  8
#endif

/**
 * @brief   eSCI-B interrupt priority level setting.
 */
#if !defined(SPC_ESCIB_PRIORITY) || defined(__DOXYGEN__)
#define SPC_ESCIB_PRIORITY                  8
#endif

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

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

/**
 * @brief   Generic Serial Driver configuration structure.
 * @details An instance of this structure must be passed to @p sdStart()
 *          in order to configure and start a serial driver operations.
 * @note    This structure content is architecture dependent, each driver
 *          implementation defines its own version and the custom static
 *          initializers.
 */
typedef struct {
  /**
   * @brief Bit rate.
   */
  uint32_t                  sc_speed;
  /**
   * @brief Mode flags.
   */
  uint8_t                   sc_mode;
} SerialConfig;

/**
 * @brief   @p SerialDriver specific data.
 */
#define _serial_driver_data                                                 \
  _base_asynchronous_channel_data                                           \
  /* Driver state.*/                                                        \
  sdstate_t                 state;                                          \
  /* Input queue.*/                                                         \
  InputQueue                iqueue;                                         \
  /* Output queue.*/                                                        \
  OutputQueue               oqueue;                                         \
  /* Input circular buffer.*/                                               \
  uint8_t                   ib[SERIAL_BUFFERS_SIZE];                        \
  /* Output circular buffer.*/                                              \
  uint8_t                   ob[SERIAL_BUFFERS_SIZE];                        \
  /* End of the mandatory fields.*/                                         \
  /* Pointer to the volatile eSCI registers block.*/                        \
  volatile struct ESCI_tag  *escip;

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

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

#if SPC_USE_ESCIA && !defined(__DOXYGEN__)
extern SerialDriver SD1;
#endif
#if SPC_USE_ESCIB && !defined(__DOXYGEN__)
extern SerialDriver SD2;
#endif

#ifdef __cplusplus
extern "C" {
#endif
  void sd_lld_init(void);
  void sd_lld_start(SerialDriver *sdp, const SerialConfig *config);
  void sd_lld_stop(SerialDriver *sdp);
#ifdef __cplusplus
}
#endif

#endif /* HAL_USE_SERIAL */

#endif /* _SERIAL_LLD_H_ */

/** @} */