SteveSFX
Senior Member

Thought I should update on this thread. Been working a lot of hours, so only got back to it this morning. DEAD. Teensy 4.0 appears to be zapped and I have no idea why. Barely anything on the breadboard. So, I...

I am completely re-breadboarding the whole project, and drawing the circuit diagram as I go to post here. I decided maybe the better option was to utilise the SPI1 and SPI2 ports on the Teensy 4, but now not so sure...

OK. I thought I was explaining my issue well enough, but I will endeavour to draw out the circuit later tonight and put that up. To be fair, this thread is the whole project and not just this issue! I will return

It would appear that this flash IC is not behaving at all. All connected with a 10k pullup on the CS pin. All OK. Connect the SCK and the bus freezes. I'll grab some more 10k's tomorrow and look at that thread,...

OK. I will grab some resistors in the morning and have a go. It must be the flash acting up, as the SD and screen play together fine (well.. that's my logic) Thanks

My concern is that it causes issues with any one of the SPI pins connected. Surely that would not be the case?

eh? Me thick. Not sure what is occuring. I have an SD module and the screen connected to the SPI pins. Each have their own CS. Added the flash IC and literally any of the flash SPI connections throws the...

Display working fine..... but Add in my W25Q128JV flash memory IC and the screen corrupts. Seems to be when I connect any of the SPI pins Just for sanity: W25Q128JV 1 = CS (has it's own chip select pin) 2 =...

OK. SD card and filenames all sorted. Binned it all, found another system I have used before and we are all working. Gave up on the new screen library. The one I have works, so I will stick with that.

Well I have a library called 'ILI9341_fonts-master' and it contains font_Arial.h. Yet... duplicate libraries and no compiling. Think my IDE is broken / a mess. Time to play Minecraft instead Multiple...

This is what I had ... char PNG_FILENAME = "/TG2.png"; This is what I get In file included from C:\Program Files (x86)\Arduino\hardware\teensy\avr\cores\teensy4/Print.h:38:0, from...

Thanks. I think I sounded ungrateful there! I am not.... thank you for all your time and attention. It's user error 99.9% of the time!

OK. I did Google. I believe my method using char was correct, it just doesn't work with the png image display routine. Been fun, but progress is slow so time to park this for a while I think. Post 32.... New...

Err... stupid here again In my post #16 There is a line: #define PNG_FILENAME "/TG2.png" // Temp PNG file to load How the heck do I change that to a variable I can...

OK. A bit of fiddling, and declaring the includes in a different order has resulted in success so far. I have managed to get it to compile with the code in post #15 with littleFS.h and MTP_teensy.h. New flash...

Deleted the repeated SD.h folder, so I assume it's using the correct one now. But, throws this up? AudioStreams? Eh? Build options changed, rebuilding all C:\Program Files...

Oh.... should have known I hadn't actually got it working. I will break it later then!

Quite possibly it is using the wrong sd library, but does that matter? I hate changing things when it's working! As for all that faff trying to use other versions of the IDE..... life's too short! lol

Arduino 1.8.9 Teensy 1.57 Beta1 (As required by the #include <MTP_Teensy.h> suggested above) Loathed to update my Arduino IDE because it breaks so many things. Above this version breaks quite a lot of my...

As soon as I try to #include <MTP_Teensy.h> (I have upgraded to the latest Teensy loader) .... I get this faceful In file included from C:\Program Files...

Thanks for that. I will look into that further. After an afternoon of bashing through library after library with different issues with each one, I managed to cobble something together that works... Ignore all the...

Well I was tinkering with the Adafruit image loader that didn't complile. After Googling away, it turns out it also needs this library to work: https://github.com/adafruit/Adafruit_EPD Would be really helpful if...

I didn't want to repeat what is being discussed on another thread.... but OK: This is the screen: GC9A01 https://www.amazon.co.uk/gp/product/B08V5538C6/ref=sw_img_1?smid=A3U321I9X7C9XA&th=1 This is my...

Does anyone know what this commented code is for in the example? /*************************************** Start of Canvas (framebuffer) WHAT THE...

Don't know! Lol I have an odd round display that is lovely, but being a pain to work with. I don't really know enough about flash comms to do this properly, so I am stabbing around in the dark a bit. The main...

Sorry... had the flu. Totally knocked for six it's 240x240. Just going to sit here now and see if I can make any headway

Can anyone point out what is wrong here (clearly alot).... #include <Arduino_GFX_Library.h> #include "flashloader.h" #include <SD.h> File root; #if defined(__IMXRT1052__) || defined(__IMXRT1062__) // PJRC...

I sent a whole evening on the LVGL stuff and got nowhere. I could not get anything to work (or even compile correctly). Trouble is, people have a go and then it's not kept up to date (at least that is what I find). ...

Sorry... I was fishing... Direct connection to the SPI pins didn't work and stopped the Oled working (which is still playing up). I didn't want to use the direct SD card connections under the 4.0, as they are pain...

I give up. Made an SD board using just an SD card slot. It is a blank pcb meant to have a level shifting ic on it. All running at 3.3v Tested all pins and all fine. Connected to my NEW 4.0 with Oled display and...

Thanks. I have a separate 1A 3.3v regulator on the breadboard already, so I will use that. Thank you

Well just downloaded a whole pile of LVGL libraries and examples. None of them compile. Not in the mood for sitting for hours working out why. Job for another day

Rezo... very interesting and a nice job! I will look into the LVGL. Did not know about that option. I will have to research all this a lot further. How did you determine the scales etc for you data and work out...

OK then, new 4.0... LCD screen purring along nicely. Images. I want to display 240x240 images on the screen. There is a demo in the GFX library showing a .c files being displayed. My question. How do I create...

OK. Just so that I don't end up stabbing pins around again... The display requires Din. Din = Miso correct? So, the Teensy 4.0 has default Mosi on 11 and Miso on 12. Does my Din connection on the screen go on...

Yea.... think I will give up trying to get this working with a 3.2 WARNING: Category 'Utility' in library FlexIO_t4 is not valid. Setting to 'Uncategorized' WARNING: Category 'display' in library DFRobot_ST7687S is...

Thanks for the reply Paul. Pretty sure the processor is the cause, but I may investigate a little further. I was breadboard on my dining room table and suddenly just died, so I don't see how a metal short would have...

Yes, I know the 4.0 is 3.3v. This screen is apparently 3.3v and 5v tolerant. Well the 4.0 is dead. Took the regulator off and the 3.3v output pin from the regulator is a dead short. So I can only assume the main...

My Teensy 4 just entirely died for no obvious apparent reason. I don't see anything connected incorrectly, and it's only powered from the USB lead. Tried an UNO and the USB lead is fine, so that is the 4.0 dead I...

Just changed those definitions as recommended above and it's spluttering! No display yet, but occasional flashes of light are a start Something is still not quite right...

I have found several resources (youtube video etc) regarding this display, but they all use an UNO. Pretty sure this library doesn't support a Teensy 4.0 in any form. I thought I would be able to simply add in my...

I would appreciate some assistance in connecting this screen to my Teensy 4.0. I don't seem to be able to work out how to declare the pins (I can literally use any pins). ...