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December 9, 2016 00:38
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RTL2838 corrupted EEPROM
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For some unknown reason, the NESDR Mini running one of my ADS-B receivers | |
(outside, on the antenna mast) packed in at the start of December 2016. | |
It had started to show the wrong USB vid:pid and other descriptor errors. | |
Some of the descriptor is kept in an external EEPROM, which is readable | |
and writable through USB commands - but I had to hack in the bad vendor | |
ID to the rtl-sdr library in order to get rtl_eeprom to even attempt to | |
dump the data. | |
static rtlsdr_dongle_t known_devices[] = { | |
{ 0xffda, 0x2838, "Generic RTL2832U OEM with corrupt descriptor" }, | |
... | |
EEPROM dumped from a working NESDR Nano 2+ | |
00000000 28 32 da 0b 38 28 a5 16 12 10 03 52 00 65 00 61 |(2..8(.....R.e.a| | |
00000010 00 6c 00 74 00 65 00 6b 00 1c 03 52 00 54 00 4c |.l.t.e.k...R.T.L| | |
00000020 00 32 00 38 00 33 00 38 00 55 00 48 00 49 00 44 |.2.8.3.8.U.H.I.D| | |
00000030 00 49 00 52 00 12 03 30 00 30 00 30 00 30 00 30 |.I.R...0.0.0.0.0| | |
00000040 00 30 00 30 00 31 00 00 00 00 00 00 00 02 00 00 |.0.0.1..........| | |
00000050 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |................| | |
* | |
00000080 ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff |................| | |
* | |
00000100 | |
EEPROM dumped from the broken NESDR Mini: | |
00000000 28 32 da ff 38 28 a5 16 ff ff ff ff ff ff ff ff |(2..8(..........| | |
00000010 00 6c 32 74 00 65 00 6b 00 ff 03 52 00 54 00 4c |.l2t.e.k...R.T.L| | |
00000020 00 32 00 38 00 33 00 38 ff ff ff ff ff ff ff ff |.2.8.3.8........| | |
00000030 00 49 00 52 00 12 03 30 00 30 00 30 1c 1c 1c 1c |.I.R...0.0.0....| | |
00000040 00 30 00 30 00 31 00 00 00 00 00 00 00 02 00 00 |.0.0.1..........| | |
00000050 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |................| | |
* | |
00000080 ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff |................| | |
* | |
00000100 |
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