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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. Cybergibbons‏ @cybergibbons 19 Mar 2020
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      |----------------| | STOP | | USING | | MICROCHIP | | PICS | | IN | | INTERNET | | CONNECTED | | DEVICES | | | | OK | |----------------| (\__/) || (•ㅅ•) || / 　 づ

      29 replies 31 retweets 263 likes
    2. SwiftOnSecurity‏ @SwiftOnSecurity 19 Mar 2020
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      Replying to @cybergibbons

      ELI5

      1 reply 0 retweets 10 likes
    3. Paul M Gerhardt‏Verified account @pmg 19 Mar 2020
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      Replying to @SwiftOnSecurity @cybergibbons

      A generation of electrical engineers (over 40 under 60) design everything using a microcontroller called a “PIC” (peripheral interface controller). They are *very* cheap. They perform no security validation.

      5 replies 0 retweets 26 likes
    4. Mx. Lottie (Charlotte)  💜 🦊‏ @Foxsan48 20 Mar 2020
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      Replying to @pmg @SwiftOnSecurity @cybergibbons

      heck... I'm 25 and I would have used a PIC[AXE] as we learned on those in school.

      1 reply 0 retweets 4 likes
    5. kuza‏ @kuzetsa 20 Mar 2020
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      Replying to @Foxsan48 @pmg and

      yeah, my first experience with microcontrollers was PIC too. these days AVR is starting to become more popular, fortunately.

      1 reply 0 retweets 4 likes
    6. Hector Martin‏ @marcan42 20 Mar 2020
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      Replying to @kuzetsa @Foxsan48 and

      I learned microcontrollers with the venerable PIC16F84 and descendants, way before Arduino was a thing. It took me over 15 years years to finally jump ship to AVRs for random small projects. Please don't use PICs. For anything. There is literally no metric where they are ideal.

      4 replies 6 retweets 31 likes
    7. thinkcomputers.slc‏ @ThinkcomputersS 20 Mar 2020
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      Replying to @marcan42 @kuzetsa and

      I have a question based on a lack of experience. I started with PIC's & we found for low frequency audio, the PIC could generate a pretty decent waveform for what we needed (sorry forgot the hz) When we tried this with the arduino's, It didn't go so well. Has this changed?

      1 reply 0 retweets 0 likes
    8. thinkcomputers.slc‏ @ThinkcomputersS 20 Mar 2020
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      Replying to @ThinkcomputersS @marcan42 and

      When I say it didn't go well, I mean it was a horrible approximation of a sine wave from the arduino, and the PIC did it fairly adequately.

      1 reply 0 retweets 0 likes
    9. Hector Martin‏ @marcan42 20 Mar 2020
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      Replying to @ThinkcomputersS @kuzetsa and

      Without more details about what exactly you were trying to do it's hard to say, but assuming you were using PWM, both micros have hardware PWM peripherals that should be more than adequate for this with a simple analog filter.

      1 reply 0 retweets 2 likes
    10. thinkcomputers.slc‏ @ThinkcomputersS 20 Mar 2020
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      Replying to @marcan42 @kuzetsa and

      You know, I just don't remember. Sorry for lack of details. We were trying to get it done without peripherals for fun using the D/A Analog out on the PIC and it worked ok. Boy now I need to go back and check my work. Its been a few years. To be fair, that was the only drawback

      3 replies 0 retweets 0 likes
      Hector Martin‏ @marcan42 20 Mar 2020
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      Replying to @ThinkcomputersS @kuzetsa and

      I've never used PICs with built-in DACs. But for low frequency (how low?) using PWM would significantly broaden the selection of micros you can use and should give adequate performance.

      7:27 AM - 20 Mar 2020
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      • Cybergibbons
      0 replies 0 retweets 1 like

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