/*****************************************************************************
 * Copyright (c) 2019, Nsing Technologies Pte. Ltd.
 *
 * All rights reserved.
 * ****************************************************************************
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 * - Redistributions of source code must retain the above copyright notice,
 * this list of conditions and the disclaimer below.
 *
 * Nations' name may not be used to endorse or promote products derived from
 * this software without specific prior written permission.
 *
 * DISCLAIMER: THIS SOFTWARE IS PROVIDED BY NATIONS "AS IS" AND ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT ARE
 * DISCLAIMED. IN NO EVENT SHALL NATIONS BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA,
 * OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
 * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 * ****************************************************************************/

/**
 * @file drv_can.h
 * @author Nations
 * @version v1.0.0
 *
 * @copyright Copyright (c) 2019, Nsing Technologies Pte. Ltd. All rights reserved.
 */

#ifndef __DRV_CAN_H__
#define __DRV_CAN_H__

#include <rtdevice.h>
#include <rtthread.h>
#include "n32g45x_can.h"
#include "can.h"

#define CAN_BAUDRATE_1M ((uint32_t)1000)
#define CAN_BAUDRATE_500K ((uint32_t)500)
#define CAN_BAUDRATE_250K ((uint32_t)250)
#define CAN_BAUDRATE_125K ((uint32_t)125)
#define CAN_BTR_CALCULATE ((uint32_t)6000)

#define CAN_TX_MAILBOX0 (0x00000001U) /*!< Tx Mailbox 0  */
#define CAN_TX_MAILBOX1 (0x00000002U) /*!< Tx Mailbox 1  */
#define CAN_TX_MAILBOX2 (0x00000004U) /*!< Tx Mailbox 2  */

#define CAN_FILTERNUM0 ((uint8_t)0)

/* attention !!! baud calculation example: Tclk / ((ss + bs1 + bs2) * brp)  36 / ((1 + 8 + 3) * 3) = 1MHz*/

/* CAN Error Code */
#define CAN_ERROR_NONE 0x0000
#define CAN_ERROR_EWG 0x0001
#define CAN_ERROR_EPV 0x0002
#define CAN_ERROR_BOF 0x0004
#define CAN_ERROR_LEC 0x0008
#define CAN_ERROR_STF 0x0010
#define CAN_ERROR_FORM 0x0020
#define CAN_ERROR_ACK 0x0040
#define CAN_ERROR_BR 0x0080
#define CAN_ERROR_BD 0x0100
#define CAN_ERROR_CRC 0x0200

/* Default config for serial_configure structure */
#define RT_CAN_FILTER_CONFIG_DEFAULT                      \
  {                                                       \
    BAUD_RATE_115200,       /* 115200 bits/s */           \
        DATA_BITS_8,        /* 8 databits */              \
        STOP_BITS_1,        /* 1 stopbit */               \
        PARITY_NONE,        /* No parity  */              \
        HFC_CONTROL_NONE,   /* No Hardwareflow control */ \
        TX_RX_MODE,         /* Tx_Rx mode */              \
        RT_SERIAL_RB_BUFSZ, /* Buffer size */             \
        0                                                 \
  }

struct n32g45x_baud_rate_tab
{
  rt_uint32_t baud_rate;
  rt_uint32_t config_data;
};

/**
 * @brief  CAN handle Structure definition
 */
typedef struct
{
  CAN_Module *Instance; /*!< Register base address          */

  CAN_InitType Init; /*!< CAN required parameters        */

  CanTxMessage *pTxMsg; /*!< Pointer to transmit structure  */

  CanRxMessage *pRxMsg; /*!< Pointer to reception structure for RX FIFO0 msg */

  CanRxMessage *pRx1Msg; /*!< Pointer to reception structure for RX FIFO1 msg */

  uint32_t State; /*!< CAN communication state        */

  FlagStatus Lock; /*!< CAN locking object             */

  uint32_t ErrorCode; /*!< CAN Error code                 */

} CAN_HandleTypeDef;

/* n32g45x can device */
struct n32g45x_can
{
  char *name;
  CAN_HandleTypeDef CanHandle;
  CAN_FilterInitType FilterConfig;
  struct rt_can_device device; /* inherit from can device */
};

int rt_hw_can_init(void);

#endif /* __DRV_CAN_H__ */
