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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. Diego Elio Pettenò‏ @flameeyes 15 Apr 2020
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      So, some months ago I bought a set of fake candles to put into a candle holder. They just ran out of batteries, and I decided to see what's inside (non destructively). And the answer is "not much". I guess the small 8SOIC is the micro.pic.twitter.com/7vdI09Foll

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    2. Diego Elio Pettenò‏ @flameeyes 15 Apr 2020
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      SOIC 8 micro, what looks like a crystal, the LED itself, and an IR receiver/decoder. And a single SMD capacitor. The LED cathode is connected to pin 6, the IR receiver at pin 4. The xtal between 2 and 3. It matches the pinout of a PIC12F510.

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    3. Diego Elio Pettenò‏ @flameeyes 15 Apr 2020
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      So, uh, if I wanted to figure out if I can dump this as a PIC — what's the tool I need? Buspirate? An UART? An SPI? An AdaFruit Feather M4?

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    4. Diego Elio Pettenò‏ @flameeyes 15 Apr 2020
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      Poking @marcan42 who probably knows, or point me in the general direction of someone with more clue than me (which is easy.)

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    5. Diego Elio Pettenò‏ @flameeyes 15 Apr 2020
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      I guess https://github.com/WallaceIT/picberry … says it would work on a BeagleBoard. Which I have somewhere in a drawer, maybe it's time to take it out and make good use of it.

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      Hector Martin‏ @marcan42 15 Apr 2020
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      Replying to @flameeyes

      If there's no marking on the IC and it hasn't been obviously scratched off, I think you're being too optimistic assuming it's a PIC. Many micros in that package have the same pinout. More likely it's some Chinese thing.

      6:49 PM - 15 Apr 2020
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        2. Diego Elio Pettenò‏ @flameeyes 15 Apr 2020
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          Replying to @marcan42

          Yeah but there's still a chance it uses the same cloned ISP protocol, no? Worth a try at least.

          2 replies 0 retweets 0 likes
        3. Diego Elio Pettenò‏ @flameeyes 15 Apr 2020
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          Replying to @flameeyes @marcan42

          I'm counting on whoever prepared the clone to have been lazy and not wanted to invent something new. It's not STC (that frankly seemed to get a better idea for ISP than I've seen in the AT89 series), or they'd have marked it.

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        4. End of conversation

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