Mii: Difference between revisions
Meleemeister (talk | contribs) →Checksum: The implementation is not wrong it's just a different one called CRC-16/XMODEM |
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==Checksum== | ==Checksum== | ||
The algorithm used to verify the integrity of the database is based on | The algorithm used to verify the integrity of the database is based on CRC-16/XMODEM. It is the same algorithm used to verify [http://wiibrew.org/wiki/Mii_Data#Block_format Mii Data on the Wii]. | ||
To obtain the correct value for the checksum, apply the algorithm to the first 0xC81E bytes of the database. This can be done using [https://gbatemp.net/threads/tutorial-give-your-mii-gold-pants-and-use-it-for-streetpass.379146/page-24#post-6569186 FixCRC]; alternativly a pseudocode implementation of the checksum algorithm is given below: | To obtain the correct value for the checksum, apply the algorithm to the first 0xC81E bytes of the database. This can be done using [https://gbatemp.net/threads/tutorial-give-your-mii-gold-pants-and-use-it-for-streetpass.379146/page-24#post-6569186 FixCRC]; alternativly a pseudocode implementation of the checksum algorithm is given below: | ||
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<source lang="python"> | <source lang="python"> | ||
def crc16_CCITTWii(u8[]: data) -> u16: | def crc16_CCITTWii(u8[]: data) -> u16: | ||
"""Calculate a checksum of data using the | """Calculate a checksum of data using the CRC-16/XMODEM implementation | ||
CRC-16/XMODEM implementation uses 0x0000 as the starting value | |||
""" | """ | ||
u32 crc := 0x0 | u32 crc := 0x0 | ||
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| 0xC | | 0xC | ||
| 0x4 | | 0x4 | ||
| Mii ID (big-endian 32bit unsigned integer):<br/>Bit 0..27: (bit[0..27] * 2) = date of creation (seconds since 01/01/2010 00:00:00)<br/>Bit 28: Always set?<br/>Bit 29: set for temporary Mii<br/>Bit 30: Set for DSi mii?<br/>Bit 31: not set | | Mii ID (big-endian 32bit unsigned integer):<br/>Bit 0..27: (bit[0..27] * 2) = date of creation (seconds since 01/01/2010 00:00:00)<br/>Bit 28: Always set?<br/>Bit 29: set for temporary Mii<br/>Bit 30: Set for DSi mii?<br/>Bit 31: not set if Mii is special | ||
|- | |- | ||
| 0x10 | | 0x10 | ||
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A red Mii that happens to be the first in the file! | A red Mii that happens to be the first in the file! | ||
The Mii doesn't really need to be red, it is only red because the personal Mii is always | The Mii doesn't really need to be red, it is only red because the personal Mii is always favorited. | ||
==Mii values== | ==Mii values== | ||
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0x64,0x06,0x14, | 0x64,0x06,0x14, | ||
0x5d,0x66,0x1b, | 0x5d,0x66,0x1b, | ||
0x04,0x11,0x6e] | 0x04,0x11,0x6e], | ||
[0x7b,0x08,0x6a, | [0x7b,0x08,0x6a, | ||
0x48,0x03,0x15, | 0x48,0x03,0x15, | ||