text: /*
   * Swamp - cooperative multitasking operating system
   * Copyright (c) 2016 rksdna
   *
   * Permission is hereby granted, free of charge, to any person obtaining a copy
   * of this software and associated documentation files (the "Software"), to deal
   * in the Software without restriction, including without limitation the rights
   * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
   * copies of the Software, and to permit persons to whom the Software is
   * furnished to do so, subject to the following conditions:
   *
   * The above copyright notice and this permission notice shall be included in
   * all copies or substantial portions of the Software.
   *
   * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
   * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
   * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
   * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
   * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
   * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
   * THE SOFTWARE.
   */
  
  #ifndef CRC_H
  #define CRC_H
  
  #include <types.h>
  
  struct crc
  {
      volatile u32_t DR;
      volatile u32_t IDR;
      volatile u32_t CR;
      u32_t RESERVED0;
      volatile u32_t INIT;
      volatile u32_t POL;
  };
  
  #define CRC ((struct crc *)0x40023000)
  
  #define CRC_CR_RESET ((u32_t)0x00000001)
  #define CRC_CR_REV_IN ((u32_t)0x00000060)
  #define CRC_CR_REV_IN_0 ((u32_t)0x00000020)
  #define CRC_CR_REV_IN_1 ((u32_t)0x00000040)
  #define CRC_CR_REV_OUT ((u32_t)0x00000080)
  #define CRC_CR_POLYSIZE ((u32_t)0x00000018)
  #define CRC_CR_POLYSIZE_0 ((u32_t)0x00000008)
  #define CRC_CR_POLYSIZE_1 ((u32_t)0x00000010)
  
  #define CRC_DR_DR ((u32_t)0xFFFFFFFF)
  
  #define CRC_IDR_IDR ((u32_t)0x000000FF)
  
  #define CRC_INIT_INIT ((u32_t)0xFFFFFFFF)
  
  #define CRC_POL_POL ((u32_t)0xFFFFFFFF)
  
  #endif
  