text: /*
               LUFA Library
       Copyright (C) Dean Camera, 2021.
  
    dean [at] fourwalledcubicle [dot] com
             www.lufa-lib.org
  */
  
  /*
    Copyright 2021  Dean Camera (dean [at] fourwalledcubicle [dot] com)
  
    Permission to use, copy, modify, distribute, and sell this
    software and its documentation for any purpose is hereby granted
    without fee, provided that the above copyright notice appear in
    all copies and that both that the copyright notice and this
    permission notice and warranty disclaimer appear in supporting
    documentation, and that the name of the author not be used in
    advertising or publicity pertaining to distribution of the
    software without specific, written prior permission.
  
    The author disclaims all warranties with regard to this
    software, including all implied warranties of merchantability
    and fitness.  In no event shall the author be liable for any
    special, indirect or consequential damages or any damages
    whatsoever resulting from loss of use, data or profits, whether
    in an action of contract, negligence or other tortious action,
    arising out of or in connection with the use or performance of
    this software.
  */
  
  /** \file
   *
   *  Bootloader user application API functions.
   */
  
  #include "BootloaderAPI.h"
  
  bool IsPageAddressValid(const uint32_t Address)
  {
  	/* Determine if the given page address is correctly aligned to the
  	   start of a flash page.
  
  	   Note that this is not static, as we need to force it into the
  	   AUX_BOOT_SECTION on small flash devices to save space.
  	*/
  
  	bool PageAddressIsAligned = !(Address & (SPM_PAGESIZE - 1));
  
  	return (Address < BOOT_START_ADDR) && PageAddressIsAligned;
  }
  
  void BootloaderAPI_ErasePage(const uint32_t Address)
  {
  	if (! IsPageAddressValid(Address))
  		return;
  
  	ATOMIC_BLOCK(ATOMIC_RESTORESTATE)
  	{
  		boot_page_erase_safe(Address);
  		boot_spm_busy_wait();
  		boot_rww_enable();
  	}
  }
  
  void BootloaderAPI_WritePage(const uint32_t Address)
  {
  	if (! IsPageAddressValid(Address))
  		return;
  
  	ATOMIC_BLOCK(ATOMIC_RESTORESTATE)
  	{
  		boot_page_write_safe(Address);
  		boot_spm_busy_wait();
  		boot_rww_enable();
  	}
  }
  
  void BootloaderAPI_FillWord(const uint32_t Address, const uint16_t Word)
  {
  	boot_page_fill_safe(Address, Word);
  }
  
  uint8_t BootloaderAPI_ReadSignature(const uint16_t Address)
  {
  	return boot_signature_byte_get(Address);
  }
  
  uint8_t BootloaderAPI_ReadFuse(const uint16_t Address)
  {
  	return boot_lock_fuse_bits_get(Address);
  }
  
  uint8_t BootloaderAPI_ReadLock(void)
  {
  	return boot_lock_fuse_bits_get(GET_LOCK_BITS);
  }
  
  void BootloaderAPI_WriteLock(const uint8_t LockBits)
  {
  	ATOMIC_BLOCK(ATOMIC_RESTORESTATE)
  	{
  		boot_lock_bits_set_safe(LockBits);
  	}
  }
  