Blog: Xilinx BIT files and the Linux/Unix/BSD "file" command: xilinx-magic

File xilinx-magic, 934 bytes (added by RevRagnarok, 17 years ago)

"Magic" for Xilinx BIT files

 
# This is Aaron's attempt at a MAGIC file for Xilinx .bit files.
# [email protected]
# Got the info from FPGA-FAQ 0026
#
# First there is the sync header and its length
0 beshort 0x0009
>2 belong =0x0ff00ff0
>>&0 belong =0x0ff00ff0
>>>&0 beshort =0x0000
>>>>&0 pstring a Xilinx BIT data
# Next is a Pascal-style string with the NCD name. We want to capture that.
>>>>0x0F pstring x - from %s
# It is followed by a NUL
>>>>>&1 byte 0x00
# And then 'b'
>>>>>&2 string b
# With the part number:
#>>>>>&5 string 4v (Virtex4)
#>>>>>&5 string 2v (Virtex II
#>>>>>>&0 string !p \b)
#>>>>>>&0 string p Pro)
>>>>>&4 pstring x - for %s
# And then NUL / 'c' / Build Data / NUL / 'd' / Date / NUL / 'e' / Data Length
>>>>>>&1 byte 0x00
>>>>>>&2 string c
>>>>>>&4 pstring x - built %s
>>>>>>>&1 byte 0x00
>>>>>>>&2 string d
>>>>>>>&4 pstring x \b(%s)
>>>>>>>>&1 byte 0x00
>>>>>>>>&2 string e
>>>>>>>>&4 belong x - data length 0x%lx