shawn

Pro tip: format your code using the "</>" button. Personally, if the code is more than a few lines and not formatted, I generally don't read it.

Server has a new SSD installed. No software, just a clean Linux install. So far the only service I've restored is DNS, so browsers can resolve forum.pjrc.com to an IP number to access this forum. I'm uploading the backup files now, about 75GB...

Here the latest version of the code running on LEDs. At minute 19:58 the diffusor is removed. And this is a simulation of a 128x128 matrix:

I'm not following. I seem to be missing context.

https://www.pjrc.com/store/header_socket_3x2.html "Pins & Socket for Teesny 4.1 Ethernet, 6 pins, 2 mm spacing"

All my Decept (hardware crypto library for Teensy 4) and QNEthernet library tests pass with this 1.61-beta1.

This post shows how to add Teensyduino 1.61-beta1 to PlatformIO: https://forum.pjrc.com/index.php?threads/how-to-add-a-teensyduino-beta-release-to-platformio.71730/post-367802 All you need to do is copy three lines into your platformio.ini file.

All the files are up for the Teensyduino 1.61-beta1 release. All the platforms are listed below; just copy & paste the appropriate line trio into your platformio.ini file. I like to put it just underneath the platform = teensy setting...

I'm not sure if it's a relevant point or not, but 0x63 is 99, which is the hundredth number starting from zero.

Pro tip: you can format code with the "</>" button. It's much harder to read, otherwise.

I put the (so far untested) script on github, with a readme for the exact parameters I've trying. https://github.com/PaulStoffregen/ARM_Toolchain_2025q4_Source If you give this a try, plan on it keeping your Mac busy for several hours and...

I'm using ARM's build-baremetal-toolchain.sh script, with a few minor edits to work around issues. I also added custom cflags with "-mmacosx-version-min=10.13", to hopefully allow it work on older versions. I was originally aiming for 10.10...

I'm curious, which instructions are you following?

@wwatson you've inspired me to add a note to the SNTPClient example with alternative hosts.

It's often the case that local routers have a time server. Some do not. This might be the reason.

I'm enjoying them.

Hi guys, I’m not sure whether you enjoy these updates or find them a bit too frequent. But I’m sharing them because feedback from potential users — and even silent lurkers — genuinely helps shape the project. It tells me what to improve, which...

Also on my mind is multi-interface support, but that's later. (No promises and no target dates.)

I am going to leave everything alone for now until you are finished with refactoring. That will minimize any confusion that might happen...

There's some stuff I need to refactor, design-wise, so that Wi-Fi fits in better. I intend to start with a new "WiFi" class (or similar) for Wi-Fi-only things. I'm currently in the process of working on converting everything to C++ plus...

@defragster - The ReadMe is @shawns ReadMe. I just added info at the top on how to use the WIFI portion and the warnings. He did all the work on the ReadMe

Sorry for above question, I think I may have changed disksize to 64k which may make the above problem. The example has no problem.

@h4yn0nnym0u5e you are exactly right. Of course, availability wouldn't even be an issue had you not put in the effort to create the software to allow them to work in the first place!

For serial monitoring, I've been using Serial2 from https://decisivetactics.com for a number of years now. I really like it.

Please show us the answer... 😄 You can hook up an oscilloscope in trigger mode and make a video of your laptop burning...😄

I wonder what the transient would look like... :) (It'll either overshoot or undershoot... my money's on the overshoot.)

I use a SOD-523 / SC-79 package style which is pretty small, but fits nicely on the pads. I normally still mount it at an angle to ensure good clearance for the pins. If you are connecting both VIN and USB power without the mod, you are...

Today I build something more complex - I'm simulating a coupled system of flow, heat, and smoke. The flow moves heat and smoke the heat creates flow cooling heat creates smoke and the renderer maps those fields into a flame appearance.

Great questions. I'll comment more about that when I have time.

@StefanPetrick great work, as always! I'm curious, did you use a paper to help guide you or did you come up with the solver on your own?

Here a few more videos from all the advection mechanics I tested before considering to actually simulate the advection. And here my previous work based on my AnimARTrix engine.

I thought I'd share a video of my own implementation (not an MCU, but I've been meaning to port to a Teensy 4):

The first tests are pretty promising. On an ESP32 it runs (without any optimisation yet) already with >30 fps on a 48x32 WS2812 matrix. So on a Teensy 4 + high res LED matrix this will fly. I guess we'll end up with a float-FPU version for Teensy...

On a typical arduino board (e.g. atmega 328p) the following code will initialize I2C then disable the internal pullup resistors: Wire.begin(); digitalWrite(SDA, LOW); digitalWrite(SCL, LOW); But on a T4.x, this doesn't work because using...

That’s good. I’ll try to remember to come back to this and explore which combinations of pins and library modifications do and don’t work, and see if further fixes are possible.

Hi, I started recently to port an Arduino Due based bulk USB interface to TeensyDuino for Teensy 4.1 The main difference seems that Arduino supported the PluggableUSB class that allows to extend the USB device with interfaces and endpoints and...

Version 14.2.1 is supported on Intel Macs. It's what I use, sometimes even with C++20. 14.3.1 is where they (ARM) stopped building them for Intel Macs. Ref: https://developer.arm.com/downloads/-/arm-gnu-toolchain-downloads

Saw this yesterday. https://mastodon.social/@tindie@hackaday.social/116459159040874878

For your reference: this is the code I use in my local tree so I don't have to worry if the target board is a regular Teensy or one of the SDRAM boards, it checks the OTP to set the voltage based on the chip variant. Not suggesting it should be...

Could you try summarizing what you're trying to do into a one-sentence question? What I'm hearing is "is it possible," and generally the answer is "yes," but I have a feeling you're trying to ask more, and I'm having trouble figuring out what...

Thanks I changed that! Let me know if you see anything else. I have integrated the OPC into a larger Data acquisition program and am getting good results so it looks like this can be done on a teensy!

When I build a project, I make an effort to "make it robust and correct" instead of "just get it to work". (I don't mean for this to sound like a criticism; it isn't.) The disadvantage of using a self-selected MAC address (other than a "locally...

I think it's fine here, it's still DMA related since that's how the FIFOs get filled (and DMA being preoccupied is why the watermark should be higher).

May I offer a slightly more general statement: transformers won't pass the DC component of a signal. (For readers that respond with the fact that the bit rate of the data signal is 800kHz.) There's likely a DC component of about 2.5V, because...

@RNoble do you feel like drawing a schematic of how everything is currently connected? I'd love to see it and it would help my mental model, and I'm sure that would also assist diagnostics here.

Yes, those are standard dupont-style female headers(*). Just make sure the plating matches, tin for tin, gold for gold. Mixing tin and gold is bad news over time. (*) Hundreds of manufacturers make them

FWIW, I looked again and sure enough, Arduino API issue #51 is still open. I must have been feeling a bit snarky nearly 5 years ago when I wrote that final comment with the horse graphic.

I didn't look too closely at the code, but I did notice that you're specifying a MAC address. You don't need to do that with the QNEthernet library; it reads the internal one for you.

Are you using the "small" compile option? That might also help.

Oh, I wasn't asking you to share code. :) I guess I'm just curious if you're doing all your own patterns, and what kind of mathematics you're using. For example, do you use regular/periodic patterns or add some noise? Do you use 2-D or 3-D...