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Type: Posts; User: sandalhat

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  1. I think it would be really interesting to explore...

    I think it would be really interesting to explore this idea but I don't know enough about the low level mechanics to know if it's feasible. I think though if you had two framebuffers both dedicated...
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    I learned about the Teensy after the 3.2 was...

    I learned about the Teensy after the 3.2 was released and I loved the hardware, platform, and community. So when the 3.5/3.6 Kickstarter happened I jumped on it and I was thrilled with how PJRC...
  3. I'm not sure I remember enough to ask an...

    I'm not sure I remember enough to ask an intelligent question, but here goes. I am trying to dig up an old project of mine that used the ILI9341_t3DMA library that was really a proof of concept at...
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    I'm no expert in this area, but I see this used a...

    I'm no expert in this area, but I see this used a lot for sharing 3D models in the 3D printing communities:

    https://creativecommons.org/licenses/by-nc/3.0/
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    I really wouldn't expect to notice a difference...

    I really wouldn't expect to notice a difference between 22Mhz and 18Mhz with this display. From poking through the library and documentation, it seems some (many?) of the calls are limited to 10Mhz,...
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    I think you should try connecting it. It seemed...

    I think you should try connecting it. It seemed to be required in practice on my hardware.

    Also, a note for later on - I had to lower the SPI_MAX_SPEED (can't check the actual define name right...
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    BuDisplay is only talking about powering the...

    BuDisplay is only talking about powering the board when they differentiate between 5V and 3.3V. Get whichever is more convenient to power. The signal levels are 3.3V for all. There is an issue on...
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    That would be awesome. I'm still hoping someone...

    That would be awesome. I'm still hoping someone will create something along these lines for the pi zero (something like an open source and highly capable version of what companies like Nextion or 4G...
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    I don't believe that's possible yet. If/when it...

    I don't believe that's possible yet. If/when it is I'd jump on it too because it would make things easier on my current project.
  10. Thanks for the suggestion. I suspected that too...

    Thanks for the suggestion. I suspected that too and there was actually an issue where all the conditions should have been met to enable RF24_SPI_TRANSACTIONS but it wasn't enabled. I fixed that and...
  11. I finally found a breadcrumb to an issue that's...

    I finally found a breadcrumb to an issue that's been annoying me for days, but I don't understand it at all. Radio data on the SPI bus is corrupted if I ever call tft.refresh() or tft.refreshOnce()...
  12. I don't think it's a hardware issue because I'm...

    I don't think it's a hardware issue because I'm using the base _t3 library, your variant, and frank's variant all on the same hardware for different testing. But yeah, I think I'll just have to track...
  13. Kurt, thanks for updating the function to draw...

    Kurt, thanks for updating the function to draw fonts using the frame buffer! It's so cool to play around with, but I just can't get it working in my program. I really wish I could narrow it down but...
  14. I've tried to start this a few times but I can't...

    I've tried to start this a few times but I can't seem to figure it out. Do you have any suggestions on how to accomplish a similar rotation(3) simulating hack that would use Frank's converted fonts...
  15. I discarded the test, but it was basically this,...

    I discarded the test, but it was basically this, which uses a font file from here:



    #include <SPIN.h>
    #include "SPI.h"
    #include "ILI9341_t3n.h"
    #include <font_Inconsolata-Regular.h> //from...
  16. I'm following the thread at least, so you're not...

    I'm following the thread at least, so you're not talking to yourself! I haven't had enough time to really be productive in the conversation unfortunately. I tested the font again and still no luck...
  17. Yeah, I noticed that on the graphic test. I think...

    Yeah, I noticed that on the graphic test. I think I got it set up right though because before I tested the font it worked fine. I'm using the same font file with the regular _t3 library, and it...
  18. Thanks for the response. I tried it last night,...

    Thanks for the response. I tried it last night, but just with the graphictest as a quick test. The imported font rendered some garbage on the screen and almost seemed to ignore setCursor. I'll play...
  19. I'll definitely give it try as soon as get a...

    I'll definitely give it try as soon as get a chance. Out of curiousity, does this handle the additional high res fonts that can be used with the ili9341_t3?
  20. Looks like I was too late!

    Looks like I was too late!
  21. I could never get refreshOnce() to work fully. It...

    I could never get refreshOnce() to work fully. It wouldn't cause my program to hang but it somehow caused color and position corruption of the frame buffer's data. However, note my unusual usage in...
  22. I would love to contribute but so far I haven't...

    I would love to contribute but so far I haven't been able to figure out anything helpful, hah. I'm nearly a beginner - one of the quintessential MIDI controller builders. I probably shouldn't have...
  23. I'm assuming based on your comments about...

    I'm assuming based on your comments about alpha-blending and antialiased fonts that this is planned to support the higher res fonts that Paul added a while back for the ili9341_t3 library, or even...
  24. Thanks for sharing this awesome work! I've been...

    Thanks for sharing this awesome work! I've been watching it but I just now got the opportunity to try it out. I have very long wire lengths so I was not really planning on trying it, but I couldn't...
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    Ah, sorry! I've only used 4 wire SPI devices so...

    Ah, sorry! I've only used 4 wire SPI devices so I won't be any help. Was hoping for an easy solution!
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    It looks like you don't have MISO connected on...

    It looks like you don't have MISO connected on pin 12? Or at all? I haven't used this library or that exact display to my knowledge, but I'm assuming that's required?
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    Thanks Paul! I may still try a version with the...

    Thanks Paul! I may still try a version with the slower 74HC while I wait on the 74LCX chips to come in. I'm not sure how to handle the MISO with something of comparable speed. This is the critical...
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    Multiplex SPI?

    I had a question earlier this year about how to use more SPI devices than we have chip select pins on the Teensy. I got several different great answers that helped me along. I have found the first...
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    The MIDI DIN you are asking about is done with...

    The MIDI DIN you are asking about is done with this library: https://www.pjrc.com/teensy/td_libs_MIDI.html

    It is very easy to use and can work alongside the usb MIDI.

    As far as the LC vs the...
  30. These are worth a look. ...

    These are worth a look.

    http://www.takachi-enclosure.com/data/p_01plastic.html

    I haven't tried any of these in the link, but I recently bought a large aluminum enclosure from them for my...
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    Or "Teensy" in large print with an actual-size...

    Or "Teensy" in large print with an actual-size graphic of one of the boards.
  32. I think it depends on the screen size you want,...

    I think it depends on the screen size you want, but if you're looking for 5 to 7 inch I think those are your best options along with sumotoy's excellent library.

    Last I looked the 5" and 7" use...
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    I'm new to this, but I think what you're wanting...

    I'm new to this, but I think what you're wanting to do is store those values to eeprom or some kind of external nonvolatile storage like FRAM. I'm using FRAM on my project because I need more than...
  34. I assume so. The segment display looks like it...

    I assume so. The segment display looks like it just directly controls the segments. The rotary encoder page you linked looks to be the same one that Paul links to on the bottom of his encoder library...
  35. Very nice, and cool to meet a fellow SSO member...

    Very nice, and cool to meet a fellow SSO member here. I actually try to stay off the Luthiery section when I'm not able to build a guitar because it always makes me want to build so I missed your...
  36. Being new to this myself I'm not going to be able...

    Being new to this myself I'm not going to be able to give you as much insight as many, but just going through your list it all seems within the capability of the Teensy. I'm thinking in terms of the...
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    Thanks for the new responses. Thank you Paul for...

    Thanks for the new responses. Thank you Paul for posting on my question. Also thank you for making this all possible, what you are doing is incredible and I appreciate all your work!

    I'll play...
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    Thanks, yeah I have been. All the libraries I'm...

    Thanks, yeah I have been. All the libraries I'm using have implemented SPI transactions. I'm going to be getting one if each device type on a bus soon (3 types) to see if I can get them all working...
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    Thanks all for the information, I appreciate it!...

    Thanks all for the information, I appreciate it! I did a test last night with 2 RA8875 displays sharing CS through the analog multiplexer and it worked really well. I like the idea of the I2C I/O...
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    16 SPI devices? Is it possible?

    Hello all,

    I have been doing some digging on this topic with mixed results. I hope to have 16 SPI devices controlled by one Teensy 3.2. Initially I planned to use a 16 channel analog mux/demux to...
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    I had been using 0.70b11 previously but tonight I...

    I had been using 0.70b11 previously but tonight I installed 0.79b11 and saw the same slowdown you experienced. I removed ADAFRUIT_PHASE_FIXUP like you mentioned and the speed went back for me also....
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    I had my own issue with the eastrising displays...

    I had my own issue with the eastrising displays that I posted about here: https://forum.pjrc.com/threads/34425-Image-Noise-issue-with-RA8875-library During troubleshooting I thought for a long time...
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    Manu, When using my eastrising boards without...

    Manu,

    When using my eastrising boards without the 74hc125, I didn't have to desolder the pull-ups on the display. However I did have to avoid pin 13 since it already has a resistor for the led....
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    Success! I was on the right track before but I...

    Success! I was on the right track before but I didn't realize 2 of the registers are stored elsewhere (the only ones that needed to change - values at position 0 and 1). BuyDisplay/EastRising must...
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    I'm not sure if this will help since it sounds...

    I'm not sure if this will help since it sounds like you are not using different hardware for your two library tests, but I observed that same low speed as in your video when I powered the 74HC125...
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    Image Noise issue with RA8875 library

    Hello all,

    I'm pretty new to this area of interest but I'm having a lot of fun so far! I am trying to get my EastRising/BuyDisplay ER-TFTM050-3 display up and running but I'm having some trouble....
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    First post here and on my phone so I won't be...

    First post here and on my phone so I won't be able to write example code. I think you're asking how to only write to an LCD when something changes? If so, you could have an if statement before...
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