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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. Imphi está turboestresado‏ @Imphinium 21 Feb 2018
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      Replying to @yawin123

      ¿Y Android no tirará de kernel personalizado? Porque hasta donde yo sé el 7.0 añadió compatibilidad con tabletas gráficas wacom, y eso huele a driver

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    2. Mikel Iruretagoyena (anteriormente, Miguel Albors)‏ @yawin123 21 Feb 2018
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      Replying to @Imphinium

      Linux tb tiene esa compatubilidad. No sé, de kernel se poco o incluso menos

      1 reply 0 retweets 1 like
    3. Imphi está turboestresado‏ @Imphinium 21 Feb 2018
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      Replying to @yawin123

      Bueno, y si no va con Raspbian, le enchufo android que en principio iría fijo

      1 reply 0 retweets 0 likes
    4. Hector Martin‏ @marcan42 22 Feb 2018
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      Replying to @Imphinium @yawin123

      Android tira de mil forks chungos del kernel según el dispositivo. Que funcione en Android no significa que funcione en un Linux normal. Pero de que dispositivo hablas? Lo normal, al margen de cosas raras como Wacom, es que sean dispositivos USB estandar que funcionen en todo.

      2 replies 0 retweets 0 likes
    5. Imphi está turboestresado‏ @Imphinium 22 Feb 2018
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      Replying to @marcan42 @yawin123

      No es USB, es un lápiz que se conecta por BT, y envía la presión ejercida. Así, entre eso y la pantalla capacitiva se podría hacer una pantalla híbrida, entre táctil y stylus

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    6. Hector Martin‏ @marcan42 22 Feb 2018
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      Replying to @Imphinium @yawin123

      Que yo sepa no existe ese concepto en Linux. Por lo tanto necesitas dos partes: un driver para el lápiz y un programa que lo combine con la pantalla capacitiva y emule un dispositivo tablet virtual que es lo que las apps soportan. Alguien lo ha hecho:http://gerev.github.io/laptop-cintiq/ 

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    7. Hector Martin‏ @marcan42 22 Feb 2018
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      Replying to @marcan42 @Imphinium @yawin123

      Al ser Bluetooth y con la API uinput todo esto se puede hacer en espacio de usuario sin tocar el kernel.

      1 reply 0 retweets 1 like
    8. Imphi está turboestresado‏ @Imphinium 22 Feb 2018
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      Replying to @marcan42 @yawin123

      ¿Entonces, se hace bajo la API uinput? Si no existiera controlador para el dispositivo, ¿Sería muy difícil leer lo que envíe el lápiz, y pasarlo por la API?

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    9. Hector Martin‏ @marcan42 22 Feb 2018
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      Replying to @Imphinium @yawin123

      Si el dispositivo es un dispositivo de entrada estándar Bluetooth (HID) entonces la entrada es vía la interfaz evdev. Si es otra cosa entonces tienes que usar la API BlueZ para hablar a nivel Bluetooth y averiguar cómo funciona. uinput es para la salida, emular una tablet.

      1 reply 0 retweets 1 like
    10. Hector Martin‏ @marcan42 22 Feb 2018
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      Replying to @marcan42 @Imphinium @yawin123

      La pantalla táctil también la leerías por evdev. evdev es la interfaz estándar de dispositivos de entrada en Linux y uinput crea un evdev virtual. evdev pantalla + evdev lápiz -> uinput (= evdev por el otro lado). Si el lápiz no es HID no será evdev y hay que bajar a nivel BlueZ.

      1 reply 0 retweets 1 like
      Hector Martin‏ @marcan42 22 Feb 2018
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      Replying to @marcan42 @Imphinium @yawin123

      evdev permite tomar el control de dispositivos de forma exclusiva que es lo que debes usar, para "robar" los dispositivos originales y que lo que el resto de aplicaciones vean sea sólo los eventos de tu salida uinput combinada (si no verían duplicados)

      4:59 AM - 22 Feb 2018
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        1. Imphi está turboestresado‏ @Imphinium 22 Feb 2018
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          Replying to @marcan42 @yawin123

          Mil gracias <3 <3 <3 Creo que ya tengo claro el funcionamiento, ahora solo necesito aprender cómo trabajar con evdev y uinput, y hecho. Ya tengo proyecto para el primer mes de verano :P El link que has encontrado parece muy factible

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        1. Imphi está turboestresado‏ @Imphinium 22 Feb 2018
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          Replying to @marcan42 @yawin123

          Aprovechando algo más de tu conocimiento, sabes algo del firmware de la Raspberry y símiles? Son libres? Y en caso negativo, como de difícil sería utilizar un firmware libre?

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        2. Hector Martin‏ @marcan42 22 Feb 2018
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          Replying to @Imphinium @yawin123

          Que yo sepa no existe un stack para rPi que sea 100% libre. El sistema siempre arranca desde un bootloader binario.

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