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Re: Linux embedded plus small TFT: ready-to-use solution

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Il 08/09/2016 01:54, edward.ming.lee@gmail.com ha scritto:
 > On Wednesday, September 7, 2016 at 4:16:16 PM UTC-7, pozz wrote:
 >> I need to develop a product based on Linux embedded (because I need to
 >> communicate with a 4G modem through USB and I have the drivers for 
Linux)..
 >>
 >> So I'm searching an almost ready-to-use solution for this product (I
 >> should minimize design cost even if this increases the price of a single
 >> product... I will produce only 10-20 pieces at the moment).
 >>
 >> The system should have only a USB host port (for 4G modem) and a small
 >> (2.8-4.3") display TFT with resistive touch panel.
 >> The display should be mounted on a panel.
 >>
 >> The best would be to have a SOM solution, so I can design my simple and
 >> custom carrier board where to mount the SOM, the 4G modem, power supply
 >> and so on.
 >> However I could use a complete (with connector) board (I'll interface it
 >> with a my custom board).
 >>
 >> The most important thing: I don't want to waste too much time to make
 >> Linux and display running. I'd like to write only the final application.
 >> Linux and display should run from the beginning.
 >>
 >> The GUI will be very simple: only about 10 different screens with some
 >> settigs and status info.  No more.
 >>
 >> Any suggestion?
 >
 > Raspberry Pi 3.  We are using hdmi display,

I think it's very difficult to find a small display with HDMI connection.

 > but there is a display port on-board.

Do you mean the DSI (Display Serial Interface)?  Even in this case, I 
think it's very difficult to find a small TFT display with DSI port that 
can be purchased as a standard product.
If you have any suggestions where to find, please tell me.

I think the best method to interface a small (2.8-4.3") TFT display is 
using a display module with an integrated display controller (such as, 
ILI9341).  The display controller can be connected to the SPI link.

As here [https://www.adafruit.com/product/1601].



 > I am sure you can find an LCD screen for it.  We are using T-mobile USB
 > 4G modem, works fine with the network and modem manager.  The only
 > problem is that the USB modem would time-out when not in use for a
 > while, and only reboot can bring it back on line.  We might end up
 > using a network keep-alive connection to keep it up.

Sincerely, I only need to send some AT commands and receive answers.  I 
don't need to make a real IP connection.  So I only need a serial port 
to open.

Telit (the manufacturer of the 4G modem I'll use) says the USB of modem 
is a standard CDC ACM and the Linux driver should be already included 
(cdc_acm).
Do you know if cdc_acm is included in Raspberry Pi Linux kernel?
Have you tried to send AT commands to your modem?


 > We only need one USB host for normal op, but a second port is handy for
 > keyboard when we messed up the 4G or Wifi connections.
 > RPI has 4 USB ports.

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Linux embedded plus small TFT: ready-to-use solution pozz <pozzugno@gmail.com> - 2016-09-08 01:16 +0200
  Re: Linux embedded plus small TFT: ready-to-use solution edward.ming.lee@gmail.com - 2016-09-07 16:54 -0700
    Re: Linux embedded plus small TFT: ready-to-use solution Jack <jack4747@gmail.com> - 2016-09-08 02:24 -0700
      Re: Linux embedded plus small TFT: ready-to-use solution Jack <jack4747@gmail.com> - 2016-09-08 02:25 -0700
        Re: Linux embedded plus small TFT: ready-to-use solution edward.ming.lee@gmail.com - 2016-09-08 09:06 -0700
          Re: Linux embedded plus small TFT: ready-to-use solution edward.ming.lee@gmail.com - 2016-09-08 09:15 -0700
    Re: Linux embedded plus small TFT: ready-to-use solution pozz <pozzugno@gmail.com> - 2016-09-09 00:24 +0200
      Re: Linux embedded plus small TFT: ready-to-use solution Paul Rubin <no.email@nospam.invalid> - 2016-09-08 16:32 -0700
        Re: Linux embedded plus small TFT: ready-to-use solution edward.ming.lee@gmail.com - 2016-09-08 17:15 -0700
          Re: Linux embedded plus small TFT: ready-to-use solution lasselangwadtchristensen@gmail.com - 2016-09-08 17:24 -0700
          Re: Linux embedded plus small TFT: ready-to-use solution Paul Rubin <no.email@nospam.invalid> - 2016-09-08 18:22 -0700
            Re: Linux embedded plus small TFT: ready-to-use solution edward.ming.lee@gmail.com - 2016-09-08 18:39 -0700
              Re: Linux embedded plus small TFT: ready-to-use solution Paul Rubin <no.email@nospam.invalid> - 2016-09-08 19:03 -0700
                Re: Linux embedded plus small TFT: ready-to-use solution edward.ming.lee@gmail.com - 2016-09-08 20:10 -0700
        Re: Linux embedded plus small TFT: ready-to-use solution pozz <pozzugno@gmail.com> - 2016-09-10 23:18 +0200
          Re: Linux embedded plus small TFT: ready-to-use solution Paul Rubin <no.email@nospam.invalid> - 2016-09-10 15:43 -0700

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