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Great you are making progress and having some fun! For your granddaughter ;)

As a kid back in similar time frame had my brother and I had a train set, not sure whatever happened to it. My wife...

@mjs513 - It did not build at when I just downloaded your branch. I was able to get it to build was to copy the conifig_example.h to config.h

That does not show up as a updated file in github as...

Quick update:

I still have not finished the above of a hybrid version, will work on that more tomorrow.

I did push up my WIP stuff up in the MEM_send_object_large branch, with a few random...

Probably best to avoid it ;) :D

For lack of better stuff, I would probably start off with things like adding digitalWriteFast or digitalToggleFast at different places in the code to see if you...

Good morning all,

As I think I mentioned, I screwed up my order and forgot to hit the final place the order at Sparkfun after the paypal stuff... So it will be awhile before I can order any.
...

I don't see any reason pins 20 and 21 should not work. However without seeing the program it may be hard to tell. Example if you still have the PulsePosition library configured and it is using...

Sorry, I have not had enough coffee yet so I may not be following this yet.

But I have having a hard time trying to understand your setup (sorry it still is early here)
Do you have an RC...

There are lots of different things you can do to speed things up.

a) The use of Opaque text drawing versus transparent. Again your code does not show enough info to know what you are doing. But...

I have found in lots of cases the connections with many breadboards and with many jumper cables, does not always work that great. It usually works find for most things I end up doing.

After all...

Sorry I am not sure what you are saying or asking here.

There are lots of options that you can choose to build for the Teensy, which many of us do.

Yes I do use the Arduino IDE for lots of...

@mjs513 @defragster @WMXZ @PaulStoffregen ...

Mike I think you are right we may never get a 100% in all cases.

The question is can we get closer.

As I mentioned, I am thinking of a Hybrid...

@luni - Thanks,

I sort of remembered having issues if two files included eeprom.h...

Example sketch:

#include <EEPROM.h>
extern void donothing();

int i=0;

Sorry, I may not be too much help when using those new fangled c++ things like templates ;) I am still more used to using stones and chisels :D

it is complaining by the different times the...

Slight update to the previous post:
Yes the using larger buffers for SD does appear to have a good speedup for the transfer of files to SD Cards. I have not tried yet to see if there are...

It often helps to have additional information, like: Arduino version, Teensyduino version, what SD library are you using? Are you using the SD on the T4.1?

My assumption is you are using SD...

Sorry not really sure what would work for you here. Hopefully others have better ideas. But if it were me, some things I might look at include:
a) an array of Time Of Flight (TOF) sensors,...

@WMXZ (and others) - I hacked up a bool like I mentioned, which I have not pushed up yet in my WIP branch. I May push it also into the branch that I have an OpenPR on.

Still playing some with...

Again not fully knowing your setup.

You can setup a host USB connector to the T3.6.

The simplest way to try it out is using the USB Host cable:...

Glad you got it working.

Was going to mention that you did not have a Serial1.begin...

Take this with a grain of salt, as I never use Eagle and the version I have is really old (6.6.0) and may not have read everything properly

But when I looked at your T4.1 board, it almost looks...

It is showing you where the matching brace is to the brace next to text curser

Note: you have to order them in groups of 480

I was wondering if we should build that capability into the mtp object?


That is do like we do in the USB Host cases or the !Serial type cases...

That is maybe add a member to MTPD:

Sort of...

Sorry not enough info to guess. What os?What version of arduino was installed. What version of teensyduino did you try to install?

I also ordered a couple of them from Sparkfun... Out of curiosity.

But I will probably not comment much here as if I do start playing with them at all, will probably look at the Pico pages up on...

Works on the T4.1 I just tried... Pin 3 and 9 are fine.

I believe the that library supports changing which SPI on the begin method...

That is if you do something like:

XPT2046_Touchscreen ts(CS_PIN, TIRQ_PIN); // Param 2 - Touch IRQ Pin - interrupt...

Yes, the T4 and T4.1 actually have a few SPI buses.

23368

They are shown on the released card as well as my excel document and photo made from it:
SPI1 has a few alternate pins for some of...

Sounds like you are making great progress!

May depend on which library you use.

But I think your commented code is wrong above: TFT_MOSI should be TFT_MISO

Note: Most of the libraries will do something like SPI.begin() and while doing...

The interesting thing is I tried the simple version that crashed after 3 plus seconds to Flash to go instead to SDIO. Again 512 bytes at a time.

CMD: 100c(SEND_OBJECT_INFO)l: 20 T:299 : 1...

XBAR - for me it was reading the manual a few times.. (sometimes more than a few)... Note: So far when playing with DMA, I have mainly needed to have some understanding of XBAR for GPIO and for...

Totally understand.... Pretty frustrating.

This morning I decided to waste some time and see if going at this completely wrong. So tried a KISS version of the code...

bool...

In many cases like this, it is often easiest to look at code that ships with the Teensyduino release, at least to get ideas, even if you may be the type who who wants to write everything from...

Nice write up - Puts a lot of the details into one place which is great.

Note: another gotcha you may run into with DMA is with caching.

That is with the example above you are using the...

Are you using the library: https://github.com/robopeak/rplidar_arduino

It looks like your code is pretty close to their example: simple_connect?

If I am looking at their documents correctly:...

Morning - Right now playing in the branch: MEM_send_object_large

@Paul - sounds great

@mjs513 - Did you have enough memory PSRAM available to be able to allocated that large of a file? Right now I try to allocate the whole thing with extmem_alloc. So if that...

I know ... talking to myself ;)

Just pushed up a WIP version of the MTP send object code, that in addition of trying to allocate a full size buffer for the file. Once the whole file has been...

Note: the Teensy boards will not show up as a USB Serial device, unless you program them to do so.

What I typically do with a new teensy, is to load up a simple sketch like the example blink,...

Hopefully someone one will be able to help you here. I personally have not tried any of the RA8875/76 custom font stuff, nor any of their ROM chips.

What we have done when we were playing with...

@mjs513 Sounds like you have been busy!

What about Teensy 2? ;) (Just kidding)

Yes it would be great if there was some tutorial or web page, that discuss DMA for the different Teensy boards. There have been several threads talking about DMA with GPIO on T4.x, that you can get...

Another quick update:

I have been playing around with my USBHost MTP code and communicating with Kindle Fire. Note: The connection with Kindle Fire (Android) is a bit touchy. Sometimes works...

Sorry I really don't know the RA887x that well to know how all of the different fonts work or not. I believe this is NOT a system font so we are simply drawing the bits.
Again I also mostly just...

The same ways as you would with a Teensy 4.

There are many ways to do so.
The Dynamixel is a half duplex serial protocol, which specification says the TTL signal is 5v, although I have never...

As for best way to uininstall a version.

First I reboot to make sure I don't have any Arduino things opened up and running.

I will often just delete the arduino (actually I rename it to some...

Internet has been up and down... Can not complain too much as it looks like lots are still without power.

I pushed up a WIP branch MEM_send_object_large which is based off of the branch I still...

Afternoon - Internet back, we are lucky, looking at the power outage map, it looks like a lot of areas are without power.
Wind was really strong overnight. It moved and flipped a trailer we pull...

Sorry internet down, so by cell...

I noticed this morning that a case statement missing

About line 844 mtp.cpp above sendobjectinfo should be case: ox100c:

Not sure if that is what you are...