text: /*!
      \file    dfu_mal.h
      \brief   USB DFU device media access layer header file
  
      \version 2020-03-10, V1.0.0, firmware for GD32E50x
      \version 2020-08-26, V1.1.0, firmware for GD32E50x
  */
  
  /*
      Copyright (c) 2020, GigaDevice Semiconductor Inc.
  
      Redistribution and use in source and binary forms, with or without modification, 
  are permitted provided that the following conditions are met:
  
      1. Redistributions of source code must retain the above copyright notice, this 
         list of conditions and the following disclaimer.
      2. Redistributions in binary form must reproduce the above copyright notice, 
         this list of conditions and the following disclaimer in the documentation 
         and/or other materials provided with the distribution.
      3. Neither the name of the copyright holder nor the names of its contributors 
         may be used to endorse or promote products derived from this software without 
         specific prior written permission.
  
      THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" 
  AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED 
  WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 
  IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS 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.
  */
  
  #ifndef __DFU_MAL_H
  #define __DFU_MAL_H
  
  #include "usbd_conf.h"
  
  typedef struct _dfu_mal_prop
  {
      const uint8_t* pstr_desc;
  
      uint8_t  (*mal_init)      (void);
      uint8_t  (*mal_deinit)    (void);
      uint8_t  (*mal_erase)     (uint32_t addr);
      uint8_t  (*mal_write)     (uint8_t *buf, uint32_t addr, uint32_t len);
      uint8_t* (*mal_read)      (uint8_t *buf, uint32_t addr, uint32_t len);
      uint8_t  (*mal_checkaddr) (uint32_t addr);
  
      const uint32_t erase_timeout;
      const uint32_t write_timeout;
  } dfu_mal_prop;
  
  typedef enum
  {
      MAL_OK = 0,
      MAL_FAIL
  } MAL_Status;
  
  #define _1st_BYTE(x)              (uint8_t)((x) & 0xFF)               /*!< addressing cycle 1st byte */
  #define _2nd_BYTE(x)              (uint8_t)(((x) & 0xFF00) >> 8)      /*!< addressing cycle 2nd byte */
  #define _3rd_BYTE(x)              (uint8_t)(((x) & 0xFF0000) >> 16)   /*!< addressing cycle 3rd byte */
  
  #define SET_POLLING_TIMEOUT(x)    buffer[0] = _1st_BYTE(x);\
                                    buffer[1] = _2nd_BYTE(x);\
                                    buffer[2] = _3rd_BYTE(x);
  
  /* function declarations */
  /* initialize the memory media on the GD32 */
  uint8_t dfu_mal_init(void);
  /* deinitialize the memory media on the GD32 */
  uint8_t dfu_mal_deinit(void);
  /* erase a memory sector */
  uint8_t dfu_mal_erase(uint32_t addr);
  /* write data to sectors of memory */
  uint8_t dfu_mal_write(uint8_t *buf, uint32_t addr, uint32_t len);
  /* read data from sectors of memory */
  uint8_t* dfu_mal_read(uint8_t *buf, uint32_t addr, uint32_t len);
  /* get the status of a given memory and store in buffer */
  uint8_t dfu_mal_getstatus(uint32_t addr, uint8_t cmd, uint8_t *buffer);
  
  #endif /* __DFU_MAL_H */
  