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  • Rezo's Avatar
    Today, 08:35 AM
    Making some progress with my test sketch but have very odd behavior. For some reason one of the transfer steps happens twice (I have no idea why) and portions of the data are incorrect in some cases. Attached is my...
    44 replies | 8663 view(s)
  • Rezo's Avatar
    Yesterday, 06:23 PM
    So I plan to use one 480*320 16 bit frame buffer that LVGL writes to and PXP reads from. Then I will have two smaller 48*320 16 bit output buffers that I will switch between so that I can rotate one while the other...
    44 replies | 8663 view(s)
  • Rezo's Avatar
    Yesterday, 10:55 AM
    I felt like I was missing something, so I have done more reading in the reference manual and modified my sketch to work as follows: PS buffer is 480*320 OUT buffer is 320*48 IF I offset the PS buffer source, I can...
    44 replies | 8663 view(s)
  • Rezo's Avatar
    01-29-2023, 03:03 PM
    Yep, unfortunately you can't do rotations from and into the same buffer, but also, the PS/AS buffer can't be bigger than the output buffer (page 1907): So my whole idea of rotating portions of the PS buffer into...
    44 replies | 8663 view(s)
  • Rezo's Avatar
    01-27-2023, 03:41 AM
    I tried this approach using the for loop, and while for some fairly light graphics it works, when lvgl animations are triggered, this is where you can really see the for loops hanging the CPU. IF dma could do the...
    44 replies | 8663 view(s)
  • Rezo's Avatar
    01-26-2023, 07:59 PM
    Attached is my sample rotation app that works well so far FlexIO actually has 4 buffers, so that would be 8 pixels per shift command until the buffers are empty. (Data sheet says 8, but many people here have had no...
    44 replies | 8663 view(s)
  • Rezo's Avatar
    01-26-2023, 06:40 PM
    So I actually used some of your sample code in the beginning of the post and got the rotation to work! Source buffer is in RAM1 and destination is in RAM2. Takes about 3ms to rotate 90/270 degrees and 13ms to transfer...
    44 replies | 8663 view(s)
  • Rezo's Avatar
    01-26-2023, 09:48 AM
    So after much testing I decided to pass through the image without rotating to see what comes out. The image is passed though fine, but with noise in the first 20-30 lines. Also, trying to rotate does nothing, as I...
    44 replies | 8663 view(s)
  • Rezo's Avatar
    01-25-2023, 07:24 PM
    Ive moved the callback execution to (PXP_STAT & PXP_STAT_IRQ) != 0 and that seems to fix the multiple calls. But, the rotation is still not 100% and it looks the same as before. I can confirm the PXP is not rotating...
    44 replies | 8663 view(s)
  • Rezo's Avatar
    01-25-2023, 09:40 AM
    Got around to wiring up my ILI9486 breakout display to my custom board Teensy MM with PSRAM :cool: Tested the sketch, but I am running into some issues: 1. The image is being rotated by 90 degrees but it looks...
    44 replies | 8663 view(s)
  • Rezo's Avatar
    01-24-2023, 08:12 AM
    @mborgerson thanks for the breakdown and code example. I'm generating an image (480*320px @16 bit color) using LVGL and feeding that into a buffer placed in DMAMEM, which is also the source buffer for PXP. PXP then...
    44 replies | 8663 view(s)
  • Rezo's Avatar
    01-23-2023, 08:47 AM
    Perfect, thanks for confirming!
    44 replies | 8663 view(s)
  • Rezo's Avatar
    01-23-2023, 08:18 AM
    @vjmuzik circling back to this as I have my custom T4.1/MM board with all the FlexIO2 pins/eLCDIF pins exposed, as well as the external PSRAM, so now is the time to start playing with this wonderful library :) 1. What...
    44 replies | 8663 view(s)
  • Rezo's Avatar
    01-20-2023, 06:36 PM
    Just a side note - I use GPT to help with the Teensy coding as well as Python/SQL. But the current model (GPT3.5) is only trained with data up to 2021 (when it was "released"). Any info or code examples that came after...
    19 replies | 1011 view(s)
  • Rezo's Avatar
    01-12-2023, 08:49 AM
    Okay, so I was doing some reading and now stuff you guys are saying is making sense; timestamp in the RTC when flashing, which explains why my time stamps looked spot on when connected to the computer over USB. Now,...
    11 replies | 234 view(s)
  • Rezo's Avatar
    01-11-2023, 04:25 AM
    Well, it works somehow :D when powered by USB via my Mac - I have no idea how or why. All I am trying to figure out it how I can set the timestamp on the files from the Time lib - still no lead there. I will note...
    11 replies | 234 view(s)
  • Rezo's Avatar
    01-10-2023, 07:36 PM
    I'll clarify and provide some more context. The device is a data logger that connect to a car. When the unit is powered up, it requests the date/time over CAN from the car, and feeds it to the time lib. This works...
    11 replies | 234 view(s)
  • Rezo's Avatar
    01-10-2023, 03:03 PM
    Im not sure about your first question? I didn’t see a set date/Time function in the SD wrapper class. If you mean it should automatically set the date/time itself using its own callback - it’s not working. Do I need...
    11 replies | 234 view(s)
  • Rezo's Avatar
    01-10-2023, 09:07 AM
    Using a Teensy Micromod with SDIO interface to log data. Each time the data log option is enabled, a new file is created. I am able to write the timestamp into the file itself (a CSV) but I am having a hard time...
    11 replies | 234 view(s)
  • Rezo's Avatar
    12-07-2022, 01:42 PM
    true, there is not enough DMAMEM for two full screen sized buffers. What I can do is have one full screen sized buffer for the display itself, and a partial buffer from LVGL that draws the page in several chunks. While...
    44 replies | 8663 view(s)
  • Rezo's Avatar
    12-05-2022, 01:41 PM
    @vjmuzik I would love to test the PXP library with LVGL and my custom display driver. A bit of background - I use an ILI9488 (480*320) in landscape mode and data is transferred via an 8 bit parallel bus (8080). Im...
    44 replies | 8663 view(s)
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