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Use Prop to communicate with this TFT display? — Parallax Forums

Use Prop to communicate with this TFT display?

eagletalontimeagletalontim Posts: 1,399
edited 2015-04-29 19:02 in Propeller 1
https://www.indiegogo.com/projects/nextion-a-cost-effective-high-performance-tft-hmi/x/10630987

I could not pass it up and had to buy 1 of each size of these displays. Not sure if I can even use them, but I would like to try to make these work with the Prop. Seems like it is a UART interface which I am sure is simple. I am not familiar with UART, but I see code in the obex for UART interfaces. Are there any other components I would need to purchase to communicate with this setup?

Comments

  • jmgjmg Posts: 15,173
    edited 2015-04-27 19:27
    Pixel counts are rather on the low side, and they fail to spec the Baud rate, or protocols, which would make me wary.
    Also not defined is if they really mean RS232 or a 5V TTL UART ? - my guess is 5V-232, as they have no RS232 chip shown.
    You may need a shipload of string space to command this, so make sure you prop system has plenty of memory (serial flash ?)

    These look similar to the EVE display-list processor from FTDI, which has added a higher pixel version.
  • eagletalontimeagletalontim Posts: 1,399
    edited 2015-04-27 19:53
    I am actually just looking to make a digital dash for my car. Something simple but informative. The other screens can be used for other projects down the road. The screen will display RPM, Speed, fuel level, Gear, and engine temp.
  • redheadedrodredheadedrod Posts: 78
    edited 2015-04-29 19:02
    I have atleast one on order too so I will be interested to see if a Prop can control it...

    I want to build a vehicle interface and would be cool if a prop can do it...

    Rodney
  • redheadedrodredheadedrod Posts: 78
    edited 2015-07-14 08:03
    I got mine today.... Trying to figure out how to hook it up without torching it. For $30 it wasn't a bad deal.

    I have the 4.3" version. If It works out I will likely get the 7" version to put in my car.

    The connector on it shows "gnd, tx, rx, 5v" So I am assuming it is a 5 volt ttl setup.

    Is this as simple as being an RS232 connection?

    I am guessing it would be a bad idea to gram my fdti serial to USB and hook it up directly to it because isn't standard rs232 based on 12 volts which would likely torch this? I see some TTL to USB convertors online and was thinking the USB connector for a prop is similar? The Prop Plug?

    The only issue with using a prop plug that I see is that the screen cable has sockets on the end of it too so I would likely need to grab some 4 pin headers to connect the two together.

    I will start there and see how it goes.

    But I also think the main idea is to load the graphics into the onboard 16meg of memory and just send data back and forth so it should simplify a display. It shows it working with an arduino.

    Might make a nice interface for a smart home setup or somethign similar.

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