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Mäh W.
@maehw@chaos.social
mastodon 4.6.9👨💻 I am interested in wired & radio communication, DSP, (embedded) software dev & engineering, FOSS, reverse engineering, IT security, space, programmable and non-programmable bricks, old and new computer technology, robots, machine embroidery & other things. Living in 🇩🇪. Speaking 🇩🇪/🇬🇧/💻 and understanding a little bit of 🇫🇷.
430 Followers
833 Following
50 Posts
Joined May 02, 2021
Auch thematisch anknüpfend an meinen letzten Toot zu einem Vortrag vom einem Chaos-Event — Sehe zeitnah mal dazu gekommen, einen Talk von der #gpn24 nachzuschauen:
https://media.ccc.de/v/gpn24-452-kindgerechte-systemarchitektur-die-open-source-musikbox-tonberry-pico / https://cfp.gulas.ch/gpn24/talk/BBRNHH/
"Kindgerechte Systemarchitektur: Die Open Source-Musikbox “TonBERRY picoTonieboxen sind beliebt, zwingen aber in ein geschlossenes Ökosystem. Der TonBERRY pico ist ein freier und quelloffener Nachbau auf Basis des Raspberry Pi Pico W. In diesem Talk zeigen wir (...)”
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Okay, at least the app did not get an update, so there's no other way than pulling the update from the Bilbo backend. Unless, it has been embedded already but only needed to be officially released... which is unlikely. I'd love to see someone diving into the relevant API calls and finding it out for us.
https://chaos.social/@maehw/116613723290758508
Woohoo! My DiyIrTower PCBs have arrived!
("Do-it-yourself infrared serial communication tower (compatible with LEGO IR serial tower)")
See also: https://github.com/maehw/DiyIrTower https://github.com/maehw/WebPBrick/
#WebPBrick #KiCad #OpenHardware #electronics
Silicon die shots of the #LEGO #SmartBrick appeared! Thanks @infosecdj@infosec.exchange for the amazing work!
Woohoo, jetzt wird es "ernst". 😃
>Hi! Wir freuen uns dir mitzuteilen, dass wir deine Einreichung “Hacking LEGO Smart Play – was steckt hinter den „magischen Steinen“?” für
TDF5 akzeptiert haben.
Gerne Input im Vorfeld, falls es wünsche gibt. 🙃
I found the opposite of Palantir.
Maybe, there's some other folks using the #Saleae logic analyzers here (or their UI + decoders aka analyzers). So I thought, I could share this question here as well:
🧵 ❓ "Adding a missing SPI chip select signal / decoding a single device without CS"
Is there a chance anyone here has a EMDVK9305SOC — an eval board for the EM Microelectronic EM9305 ("em | bleu") Bluetooth microcontroller/SoC which they don't need anymore? Or a logic analyzer trace of the SPI HCI programming (and optionally also including the UART of the USB/serial interfaces) the NVM with some blinky example using `blengine`?
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MathWorks' Simulink also seems to have a nice Logic Analyzer. Best case an existing tool is FLOSS...
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Hallo zusammen. Ich würde gerne ganz legal zwei #Fotos von #Shutterstock kaufen, habe aber keinen Account und kein Abo — und möchte das für zwei Fotos auch nicht. Hat von euch wer und würde mir gegen Geld zwei Fotos von deren Kontinent abdrücken können? Nicht für Print sondern Web benötigt bzw. auch eine öffentliche Präsentation mit Aufzeichnung.
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The MOSI_or_MISO and MISO_or_MOSI labelling of the channels is obsolete btw. It's perfectly clear which one is which. 🤓
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@stacksmashing@infosec.exchange do you have an idea why there is an additional external flash even though there's alway 1 MByte of flash in the uC itself... which may be harder to access than dumping an external flash?
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Looks like I will try my best with Perfetto, its Protobuf format and the Python library. I was able to play around with it and it seems to prove at least the basics that I need. And it feels very convenient so far.
8/
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Saleae Logic is another great tool — to display digital (binary; high/low) and "analog" waveforms. And markers... which comes closer to what I need for events but basically for single channels only. It has a nice UI where it can blend in decoded data. I guess I want things from various worlds.
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For the state timeline.. as mentioned before: I don't want to visualise tasks that can be ready/blocked, waiting, sleeping, idle, ... — I need completely arbitrary state enums per state variable. PlantUML offers a lot of flexibility, but I'd need to break down the time scale to many snippets and stitch them together. But what to use for the waveform? And Perfetto UI trace viewer seems to be made for processes, too. I've also got some VHDL testbench viewer in mind, but can't recall any name.
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Oh, I remember that I have seen this one before: WaveDrom (https://wavedrom.com/tutorial.html) But I'd say this is for short digital signal snippets only. And seems to require synchronous data and not something timestamp-based.
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Finally found am example for the static state diagram thingie. My states would have names instead of numbers. But the core idea is represented.
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For the static view as in classical UML state diagram. But the transitions more like from a "Sankey diagram" to get a feeling how likely one state is followed by another. And I need this for all states of my system.
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@blinry also been there last summer. A great place, indeed!
https://chaos.social/@maehw/115010881143545672
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@adafruit@fosstodon.org nice work! What tools did you use for your analysis? I am looking forward to your further work, i.e. "What We Didn’t Capture". Especially smart tag contents and the brick-to-brick protocol.
#LEGO #SmartPlay #SmartBrick #ReverseEngineering #HardwareHacking
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@stacksmashing@infosec.exchange @tavisco@bolha.us kind of funny that 16 byte width seems to be the expected default (yes, it makes sense address-wise; but could also be 32 bytes, etc.).
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@ibigfoot@chaos.social @lisa@social.telemetrydeck.com @stadtaugsburg@mastodon.social gibt's den Podcast auch frei als Link für den Podcatcher?
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@whitequark You'll probably also try to power it with a DC power supply instead of the battery, right?
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@RueNahcMohr@infosec.exchange @infosecdj@infosec.exchange might be as the brick does have a microphone and a loudspeaker both connected to the ASIC as it seems.
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»(...) none of this is permanent: The power boost from training only lasts until the Smart Brick is removed from that pokémon (or its battery dies), so you can’t train up a squad over time.« — So technically, this reads like training experience must be stored in the brick"s RAM. However, there'd be potential to store it in the brick's external SPI flash.
"Lego’s Smart Play Pokémon can train and battle, but don’t do the one thing I wish they could" —
https://mastodon.social/@verge/116680792649219507
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@fluepke Hatte die Idee auch schon. Und auch angefangen mit der Umsetzung. Inspiriert von https://github.com/Staacks/gbinterceptor — liegt vielleicht sogar noch lokal auf einem Rechner. Weil scheinbar nichts veröffentlicht. Kann mich aber an den Stand nicht mehr erinnern. Vermutlich eines von vielen unfertigen Projekten.
Anyone in Europe got a spare Tag Connect TC2050-IDC-NL they'd sell to me? When new, they seem to cost a fortune. Ali* also does not seem that cheap.
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@whitequark yeah, I'd love to see that being done. What's your plan of how to do it? I think you'd need to un-power or desolder the Bluetooth SoC as this one connects the the CS signals and hence should be the bus master. Or desolder the flash? It's so teeny tiny... I can't do it. You could have it from my second PCB.
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@whitequark the big one is the custom ASIC and the other one should be the external flash. Do you know about https://github.com/nanash1/smart_brick ? I think they did a great job and this way I didn't have to beep out the PCB myself. Expect for the missing CS line maybe. BTW, when I read the SoC's datasheet, I wondered why they had external flash at all if it already has half a Megabyte internally. Firmware got too big? Guess we'll see soon.
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@whitequark someone had identified it as a Winbond SPI flash (to be confirmed, I guess).
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@Matrix11@chaos.social @FabLabMuc@muenchen.social nice. How did you cut the foam? With a laser or a hot wire or something else?