1 | /*
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2 | LUFA Library
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3 | Copyright (C) Dean Camera, 2021.
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4 |
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5 | dean [at] fourwalledcubicle [dot] com
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6 | www.lufa-lib.org
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7 | */
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8 |
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9 | /*
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10 | Copyright 2021 Dean Camera (dean [at] fourwalledcubicle [dot] com)
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11 |
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12 | Permission to use, copy, modify, distribute, and sell this
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13 | software and its documentation for any purpose is hereby granted
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14 | without fee, provided that the above copyright notice appear in
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15 | all copies and that both that the copyright notice and this
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16 | permission notice and warranty disclaimer appear in supporting
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17 | documentation, and that the name of the author not be used in
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18 | advertising or publicity pertaining to distribution of the
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19 | software without specific, written prior permission.
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20 |
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21 | The author disclaims all warranties with regard to this
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22 | software, including all implied warranties of merchantability
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23 | and fitness. In no event shall the author be liable for any
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24 | special, indirect or consequential damages or any damages
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25 | whatsoever resulting from loss of use, data or profits, whether
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26 | in an action of contract, negligence or other tortious action,
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27 | arising out of or in connection with the use or performance of
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28 | this software.
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29 | */
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30 |
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31 | /** \file
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32 | *
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33 | * Bootloader user application API functions.
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34 | */
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35 |
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36 | #include "BootloaderAPI.h"
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37 |
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38 | static bool IsPageAddressValid(const uint32_t Address)
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39 | {
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40 | /* Determine if the given page address is correctly aligned to the
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41 | start of a flash page. */
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42 | bool PageAddressIsAligned = !(Address & (SPM_PAGESIZE - 1));
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43 |
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44 | return (Address < BOOT_START_ADDR) && PageAddressIsAligned;
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45 | }
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46 |
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47 | void BootloaderAPI_ErasePage(const uint32_t Address)
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48 | {
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49 | if (! IsPageAddressValid(Address))
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50 | return;
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51 |
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52 | ATOMIC_BLOCK(ATOMIC_RESTORESTATE)
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53 | {
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54 | boot_page_erase_safe(Address);
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55 | boot_spm_busy_wait();
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56 | boot_rww_enable();
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57 | }
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58 | }
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59 |
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60 | void BootloaderAPI_WritePage(const uint32_t Address)
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61 | {
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62 | if (! IsPageAddressValid(Address))
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63 | return;
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64 |
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65 | ATOMIC_BLOCK(ATOMIC_RESTORESTATE)
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66 | {
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67 | boot_page_write_safe(Address);
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68 | boot_spm_busy_wait();
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69 | boot_rww_enable();
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70 | }
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71 | }
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72 |
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73 | void BootloaderAPI_FillWord(const uint32_t Address, const uint16_t Word)
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74 | {
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75 | boot_page_fill_safe(Address, Word);
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76 | }
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77 |
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78 | uint8_t BootloaderAPI_ReadSignature(const uint16_t Address)
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79 | {
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80 | return boot_signature_byte_get(Address);
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81 | }
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82 |
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83 | uint8_t BootloaderAPI_ReadFuse(const uint16_t Address)
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84 | {
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85 | return boot_lock_fuse_bits_get(Address);
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86 | }
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87 |
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88 | uint8_t BootloaderAPI_ReadLock(void)
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89 | {
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90 | return boot_lock_fuse_bits_get(GET_LOCK_BITS);
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91 | }
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92 |
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93 | void BootloaderAPI_WriteLock(const uint8_t LockBits)
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94 | {
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95 | ATOMIC_BLOCK(ATOMIC_RESTORESTATE)
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96 | {
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97 | boot_lock_bits_set_safe(LockBits);
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98 | }
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99 | }
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