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  1. I'm going to take another shot at the gsl1680 ......

    I'm going to take another shot at the gsl1680 ... and try the code you have posted ... I was able to get touch to work but only half the screen was responding.. Thankyou for posting up ..

    Where...
  2. I did manage to get the touch panel to work .....

    I did manage to get the touch panel to work .. but the problem being only 800 X 200 pixels of the panel were supporting touch .. half of the screen would not respond . I could get the panel to work...
  3. I had tried spi clock from 40 MHz fown to 20 MHz...

    I had tried spi clock from 40 MHz fown to 20 MHz then finally down to 6 MHz .. and the screen is the same ..I pulled it apart tonight , but the screen is very dim.. I'll put it back together and...
  4. WOW ... I am at a loss ...LOL .. thanks for the...

    WOW ... I am at a loss ...LOL .. thanks for the reply ..
  5. Blackketter.. are you configured for 3 wire spi...

    Blackketter.. are you configured for 3 wire spi or 4 wire spi .. I'm configured for 4 wire spi
  6. Thankyou for the reply .. I'm struggling with the...

    Thankyou for the reply .. I'm struggling with the Ra8876 display which is 7.84" 1280 X 400 pixels and requires SPI for 2 chips on the board SSD2828 is the bridge chip from SDI to MIPI and needs to be...
  7. Multiple devices on SPI buss RA8875 Tri-Sate issue

    I know there is an issue with Tri-stating on the SPI buss with RA8875 displays ..

    the question I have is if you have 2 devices on the SPI buss that have their own CS lines ...
    Is the tri-state...
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    I am still struggling getting this display to...

    I am still struggling getting this display to work .. I'm trying to integrate it with the teensy 4.1 ..
    I have tried the fork for the 7.84" display under wwatson4506 (RA8876liteTeensy) .. I can get...
  9. I'm running on the t4.0 , the code appears to be...

    I'm running on the t4.0 , the code appears to be running , display is trying to work , lines across the display , I'm currently using this pinout configuration with the T4.0
    // Pin connection...
  10. IS there no command to define the screen pixel...

    IS there no command to define the screen pixel size? or is it strictly calculated ..?
  11. Okay update .. I switched from the t4.1 to the...

    Okay update .. I switched from the t4.1 to the t4.0 .. I re-did the configuration jumpers a second time ... I have torn graphics on the screen ..colored lines and they appear to be changing...
  12. blackketter .... I'm at the point I had best take...

    blackketter .... I'm at the point I had best take your wiring trace ... I was hoping I would not have to ask you this but , Something is not right ..

    Thanks
    K
  13. Well tried both displays .. Not pulling my hair...

    Well tried both displays .. Not pulling my hair out yet .. but no luck yet .. This should be running ...but I'm missing something and just have not figured it out yet... LOL

    will keep trying .....
  14. No happyness, Built the new supply .. voltage and...

    No happyness, Built the new supply .. voltage and current are good under load ... Ran an RA8875 off the supply with a teensy 4.1 to test .. all good .... no issues ..

    reconnected the ra8876...
  15. Hi Derek, thanks for updating your SDR library...

    Hi Derek, thanks for updating your SDR library ..There are members on my Facebook Group (Keiths_SDR) that are using it for their receiver builds ..Im also running the 2.8" touch panel as well as the...
  16. Thanks for your reply .. Im building up a new...

    Thanks for your reply .. Im building up a new supply for my project and will make sure I have sufficient current ...but I did drive it off a supply that could provide 1.5amps .....but I did check the...
  17. I have a scope I'll check the SPI out .... I've...

    I have a scope I'll check the SPI out .... I've just not been able to get to it yet .. I'll post an update...
  18. Okay, glad you saw that first hand ...I could not...

    Okay, glad you saw that first hand ...I could not identify where the message was coming from ..Still no change , can't write anything to display on the screen ....Hopefully someone will chime in.
  19. well for grins and just to make sure I wasn't...

    well for grins and just to make sure I wasn't losing my marbles .. I pulled the Dupont connectors off the display and routed them to an RA8875 display on the bench .. loaded code and up it came...
  20. Look fine by me, but I have to admit this one is...

    Look fine by me, but I have to admit this one is a challenge and it shouldn't be .. it's straight up wiring and pin configuration validation ..
    So I must be missing something but I can't figure out...
  21. I'm on arduino 1.8.13 and teensyduino 1.53...

    I'm on arduino 1.8.13 and teensyduino 1.53 ....just for the notes
  22. Yes I ran your example ... no luck .. backlight...

    Yes I ran your example ... no luck .. backlight but no display activity
  23. Just tested with your pin mapping (no luck) .. is...

    Just tested with your pin mapping (no luck) .. is your display board the rev1.0 version ?
  24. Okay .. validated the configuration for the...

    Okay ..
    validated the configuration for the second board all is good ...
    validated connections from display to teensy ...everything is where it should be according to your pinout list
    deleted my...
  25. Not only is it misconfigured , but c25 on the...

    Not only is it misconfigured , but c25 on the board is not properly mounted ..
  26. c26 on my board after looking at it is not even...

    c26 on my board after looking at it is not even bridged across its 2 pads its offset by a pad ..!!

    I'm going to check my other board out..
  27. for the SPI 4 wire configuration all pins that...

    for the SPI 4 wire configuration all pins that should be shorted are fine ...
    but there are pins that are suppose to be "open" which are shorted.

    light touch with my iron and I'll test again
  28. Good call ... its misconfigured ...!!! I'll work...

    Good call ... its misconfigured ...!!! I'll work through it this evening
  29. Good Idea .. I had not thought of that...

    Good Idea .. I had not thought of that ...getting complacent.. I've got a number of other displays from them and they came without a hitch ... I have a second 7.84" I could try to rule out a bad...
  30. No problem on the silence, I'm running it off my...

    No problem on the silence, I'm running it off my USB port on my HP workstation.I'll cut it over to my 5v supply... I've run my ra8875s ..4,3" 5" and 7" off usb with the t4.0/T4.1 so more then likely...
  31. Okay, The backlight is coming on for the ra8876...

    Okay, The backlight is coming on for the ra8876 7.84" display. But still can't seem to get text or a screen fill with color ....
    I'm running this on a t4.1
    is pin 36 on the 7.84" display (2828DC)...
  32. okay .. I feel silly I just realized I dropped...

    okay .. I feel silly I just realized I dropped the ssd2828.h and .cpp files ..
  33. no luck , thinned it out

    #include "Arduino.h"
    #include "_font_ComicSansMS.h"
    #include "ER-TFT0784_t3.h"

    // Pin connection mapping
    ER_TFT0784_t3 tft = ER_TFT0784_t3(
    // Teensy pin // Display pin
    10, ...
  34. Blackketter .. Well gave the code a shot .....

    Blackketter .. Well gave the code a shot .. compiles and loads the demo .. but screen does not respond (Black no activity)... Validated my wiring and matched 1 for 1 for the t4.1 and what you have...
  35. oh wow !!! thanks ... Last time I had looked, the...

    oh wow !!! thanks ... Last time I had looked, the 7.84 was not moving forward ..

    I got the display a while back but am somewhere above a "beginner" and certainly below an "intermediate"...
  36. A big thank-you to Greased Lightning ..Ive been...

    A big thank-you to Greased Lightning ..Ive been struggling with the gsl1680 touch code , and he managed to get me up and running...Ive been on another project and only found today to give it a good...
  37. buydisplay 1280 X 400 TFT ra8876 AND SSD2828 SPI connectivity

    I have 2 of these buydisplay7.84 "candy bar" 1280 X 400 displays ..

    They require SPI for the RA8876

    and SPI for the ssd2828 chip .. which needs to initialize communications to the RA8876
    (its...
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    Thanks for the reply Paul, greatly appreciated...

    Thanks for the reply Paul, greatly appreciated ..Ill keep the 3.3v and 5 v sorted first ..thanks for the heads up..
    K
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    Pcm1808 teensy 4. integration ..

    I'm okay on the pinout, wiring ..no issues. But in the pjrc audio design tool do we just use the standard I2S input ?
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    Thankyou so much for the link ..I was running...

    Thankyou so much for the link ..I was running through threads back mid 2020 and couldn't get a grasp where things were ..Im cutting over to the t4.1 ..I understand I need 2 spi ports to get this up...
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    Ra8876 7.84" display library

    ive been trying to read up on the status of this library and get caught up ..Im currently running an ra8875 4.3" 800x480 display and t4 and purchased the 7.84" ra8876 1280 x 400 display last...
  42. Thanks KurtE.. yes 5206 .. I just couldn't figure...

    Thanks KurtE.. yes 5206 .. I just couldn't figure out how to redirect to the alternate wire1..and I was goigling and checking out sumotoy 5206 but couldn't find a reference to switching to an...
  43. T4.0 ra8875 display and i2c touch screen ..

    I have the above working fine , no issues , but could use some schooling on an aspect of i2c .. Im currently using the wire library default and my i2c is running on pins 18/19 on the t4 for the touch...
  44. That's what I thought as well .. and there is a...

    That's what I thought as well .. and there is a history of that with this display ..

    BUT I can't figure out why the one that doesn't tri-state correctly on pin 8 can function properly when I move...
  45. ILI9488 and teensy 4 and touch 2046 and ILI9488_T3

    Okay .. this is just an observation of which I'm totally puzzled . I purchased 2 X ili9488 from the same vendor ... both displays work fine . I did have to drop the MISO line off the display portion...
  46. Good Idea on the SMD sample kit I was not...

    Good Idea on the SMD sample kit I was not thinking of that .. I'm good on what has to be done .. I have other buy display screens that are SPI now so familiar with 4 wire setup on my teensy 4.0 and...
  47. Yes ..thats the panel , sorry I should have...

    Yes ..thats the panel , sorry I should have posted up the model I ..I need 3 x 10k for r1/r2/r3 on the top left of the board ..I just don't know the component size 1206/0805 ?
  48. Buydisplay 7" RA8875 ft5206 800 x 480 display jumper re-configuration

    I received the above display in the title ..but missed the proper configuration ..though it came configured for spi ,but jumpers are set up for 8080....I can re-do the jumpers , but there is a...
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    Disregard my post .. I had a conventional FFT...

    Disregard my post .. I had a conventional FFT running off a mixer and the second taking I/2 from a different source ... I thought about what you said .. walked away from it and fixed it .. thanks for...
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    Analyze_FFT256IQ

    Just a quick question ..

    I'm running a teensy 4.0 and rev "d" audio shield .. no issues
    I can generate the I/Q requirements and the the FFT Display works fine ... But I can only drive it via the...
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