issues with display #18
Replies: 6 comments 33 replies
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Hi, great that (almost) everything seems to work. Could you try to lower the SPI frequency from 80 to 40 MHz? Its barely noticeable in terms of frame rate but some displays might not be able to handle the full speed. |
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Works as expected now! |
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Assembled and ready to test! I was beginning to doubt my soldering skills when I saw the screen.
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@phant0mias Honestly not sure. I already stuck it to my PCB and don't want to peel it back off. |
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Same, I don't want to peel it off. I ordered mine off of adafruit though. |
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The old displays and boards from Adafruit (until ca. January 2023) are type DT280QV10-CT. One of these was used for my working prototype. The new displays and boards should have the label CH280QV10, meaning they are made by ChengHao Optoelectronic. I ordered three of these new displays directly from the manufacturer earlier this year. They all had problems with the touch sensitivity (random ghost touches). I contacted them but was not able to resolve the issue yet. |
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@ramonflores08 It would be very interesting to find out what type your display is. The silkscreen on the flex cable is slightly different. The left one is an older Adafruit board (most likely DT280QV10) and the right display is a Chenghao type.
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I shall take one for the team and disassemble it lol. Give me a few mins. |
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This is the back of my screen. It is the newer one you mentioned from ChengHao Optoelectronic. It has worked with no issues ever since I changed the SPI frequency from 80 to 40 MHz as per the previous comments.
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so it is the Chenghao type. It works with no problems? |
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Well, I did have to lower the frequency, but yeah no problems. It feels snappy, and I have not noticed any issues. |
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@ramonflores08 Thank you for the sacrifice! 😄 |
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Could be. Sorry about the bad luck. I honestly thought I had a bad screen as well when I saw the image. I have had not noticed any ghost inputs. I think I have narrowed down my charger status to component U1. It keeps outputting approximately 1V even when it's disconnected from the USB. I am going to get a new one and replace it. |
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The STAT pin should be high while battery powered and low while charging. For the USB icon to appear, the STAT pin must be either low (charging) or it must be high while the supply voltage is above 4.3V (charge completed but plugged in). Are you using the original MCP73831? |
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I belive i got the correct one. below is the link to the one I ordered. |
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Yep, that's the correct part. |
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I am going to replace the U1 IC since I do hear a high pitch wine when plugging in the USB. By removing it the board acts normally with the VBUS going back up to the expected 4.3V. I may have just gotten the luck of the draw and received a faulty chip, or I damaged it who knows? |
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I also have the new adafruit display and my touch functionality is not working. |
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Funny you say that, I'm actually just about to. I'll let you know how it goes |
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So I ran the scan and no devices found. I'm like 99% sure that everything is soldered correctly |
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Just resoldered the esp32 and the accelerometer and I'm now finding the devices |
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Just resoldered the esp32 and the accelerometer and I'm now finding the devices |
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Fully working, must have been a short on one for the chips |
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I uploaded the code and it seems that the screen is not displaying properly. Im not sure if its a hardware issue or software. Below is an image of what i see. The screen seems to be working and the touch works fine. If i press buttons on the screen the image of the button i pressed gets fixed. Let me know what you think.
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