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marcan42's profile
Hector Martin
Hector Martin
Hector Martin
@marcan42

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Hector Martin

@marcan42

If it ain't broke, I'll fix it! I'm porting Linux to Apple Silicon Macs at @AsahiLinux. http://patreon.com/marcan  | http://github.com/sponsors/marcan 

Tokyo, Japan
marcan.st
Joined May 2009

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    1. Hector Martin‏ @marcan42 24 Jan 2019
      • Report Tweet
      • Report NetzDG Violation

      Hector Martin Retweeted Hector Martin

      Seriously, now I want to buy a camera, smash the chip, and crack their firmware so it doesn't have the check. As far as I know there is no secureboot involved, so it should be trivial. This Is Just Inexplicably Dumb.https://twitter.com/marcan42/status/1088472549715918848 …

      Hector Martin added,

      Hector Martin @marcan42
      Apparently the Raspberry Pi camera has a DRM chip in it to stop anyone else from designing or producing third party cameras. https://www.raspberrypi.org/forums/viewtopic.php?t=149426 … WTF‽ I think I'm going to start calling it the Raspberry iPi. Why the hell is this garbage in an *educational* product?
      Show this thread
      13 replies 86 retweets 292 likes
      Show this thread
    2. Hector Martin‏ @marcan42 24 Jan 2019
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      HMAC-SHA256 key for the secret authentication chip: a9ec1b1359251fdb4d06efb95dc19ebcfb39e72e08253e5ab2d603de5800f500 XORing every byte with the previous one, top notch obfuscation there rPi Foundation. sub_EC8ABBC on the latest start_db.elf.pic.twitter.com/YkwZjFbjgY

      10 replies 125 retweets 416 likes
      Show this thread
    3. Hector Martin‏ @marcan42 24 Jan 2019
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      Correction: the key is 0d48bfb7fd81bb7fe9a24b1df9653a185f9d438aac819afe1672a77afca451a4. Went down the wrong codepath for the first key (there was an extra xor). I checked and this one computes the same results as the real Camera Module V2 from public I²C traces.

      5 replies 48 retweets 169 likes
      Show this thread
    4. Helge Wurst‏ @MisterHW 25 Jan 2019
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      Replying to @marcan42

      It's time to build this HDMI-to-CSI-2 adapter for HDMI video input. Calling it :)

      2 replies 0 retweets 4 likes
    5. Hector Martin‏ @marcan42 25 Jan 2019
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      Replying to @MisterHW

      You don't need to break the DRM for that. This is only about using the ISP codepath for Camera V2 compatible cameras.

      1 reply 0 retweets 1 like
    6. OSS FPGA & ASIC EDA tools‏ @ico_TC 25 Jan 2019
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      Replying to @marcan42 @MisterHW

      Do you know of any non-foundation CSI camera working with RasPi?

      2 replies 0 retweets 1 like
      Hector Martin‏ @marcan42 25 Jan 2019
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      Replying to @ico_TC @MisterHW

      I don't, but I haven't looked into it much either.

      10:27 PM - 25 Jan 2019
      • 1 Like
      • Dave 🏳️‍🌈
      1 reply 0 retweets 1 like
        1. Helge Wurst‏ @MisterHW 26 Jan 2019
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          Replying to @marcan42 @ico_TC

          maybe the Ti SN65LVDS315 can hooked up to the Raspberry Pi CSI interface. There's just the 8 bit interface on the other side to hook up a camera module or FPGA. Bloody MIPI, seriously. http://www.ti.com/lit/ds/slls881g/slls881g.pdf …

          0 replies 0 retweets 1 like
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