Activity Stream

Can you give me a small self-contained program (using only libs Teensyduino installs) which I can copy into Arduino (not PlatformIO) to reproduce the problem? To specifically answer your question: ...

Windows doesn't allow programs to write to the folders where the APP software are stored, even if run with admin privilege. As Defragster explained, Teensyduino needs to install patches to the Java code. With...

Audio to the Audio Shield goes vie I2S, not I2C, I2C is just used to control the Codec, so need to worry your Display interferes with Audio Data.

The 'download' link in p#5 notes which versions of the IDE are supported. For supported versions the installer maintains the needed java files to complete a working install on those known versions. Current TD 1.53...

Easier than BASIC? Should i have a look at it? It just because i feel my Code looks like BASIC code in a C++ Wrapper ;-)

I dont use 3.5/6 or 4.1s :-) Honestly whats easier? Copy a file (where is my card ????) to a SD (where is my card reader????) and plug it into a board (dont forget to make the SD Slot easily acessible - my Teensys...

A question do your teensyduino install contain all versions of the arduino pde.jar and arduino-core.jar for all supported versions of arduino ide?

Yes, but you need to use these longer pins and these sockets (2 of each): https://www.pjrc.com/store/header_14x1_d.html https://www.pjrc.com/store/socket_14x1.html These allow the longer board to mount higher...

Got my MIMXRT1170-EVK ordered from Mouser. Hopefully i'll get one :-) My wishes for a future Teensy board: - i.MX RT 117X - In principle something like Olimex did with their STM32 boards:...

@jonr: no audio glitches here while changing CPU freq while audio is playing. I am using I2S audio with ADC PCM1808 and DAC PCM5102 with the Convolution SDR code.

Usually this error happens on Linux when attempting to install into a distro-provided copy of Arduino. Only the original Arduino IDE from Arduino.cc website is supported. The many modified copies from Linux distros...

Hi JayShoe ! excellent, just what I need ! I tried to participate in Kickstarter, but it did not work out, maybe because of problems with overseas credit cards / payment . . . it seems Kickstarter is not well...

Is this on Windows or other? See this page for OS specific details in any case : pjrc.com/teensy/td_download.html If Windows was it a ZIP or Installer from the Arduino site? Windows Store version does not work...

Thanks a lot for your clear explanation. I was aware that multiple I2C devices can share a bus, but I was wondering if the audio wouldn't be affected since it requires very high speeds. Not sure how the protocol works...

Right now we only use one core. MicroPython does allow both through the thread api I think. I’m thinking about treating the second core more like a pio state machine. Plenty to do before we use the second core.

The content should look like this (plain and simple but with your version instead) https://raw.githubusercontent.com/technologiescollege/arduino/master/lib/version.txt

It looks like the version.txt is missing in the arduino installation, you can create one yourself what version of arduino do you have installed?

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

are you on the latest github version? if not try that out

Does anyone have a working example of adapting flasher4 to load .hex firmware from an SD card? I've spent a fair number hours reading through this thread, the code, and the instructions, and can't quite figure out how...

Looks like this should be fairly straightforward. I've learned the hard way (many more times than I'd like to admit) about putting too much work into supporting a new platform or new tech before it really offers...

Hi Paul, Thanks for the quick reply. It's 400 pixels total. Can the Teensy 4.1 fit on the Octows2811 adapter? It seems longer with 24 pins as compared to 14 pins on the Octows2811. Please advise. Thanks, Regards,...

... crossposted as I was unzipping and confirming for post #13. TeensyDuino only works when and because it modifies the JAVA code installed with the indicated installs - that excludes the Windows App as it installs...

Thank you Paul! Cheers.

Not sure if this relates or helps? Just did a fresh UNZIP to :: Directory of T:\arduino_1.8.13_td154Port\ Created :: Directory of T:\arduino_1.8.13_td154Port\portable Opened the IDE and The Portable gets these...

I almost have this figured out. The conflict is the physical connection on pin 5 between the Teensy 4.1 and the OctoWW2811 Adapter. Still digging...

No, I was responding to the post. The issue is the only reason I need to use the downloaded installer vs the "APP" is because of TEENSY. No other boards have an issue with the APP from the APP store so this is why...

Ok, updated the code with the *dop data: GPS pdop=1.8, hdop=1.5, vdop=0.9

I would guess that there would be a lot of value in teensy wrapper libraries that are compatible with the pico libraries. Ie, an easy migration path for users who start on the low cost pico and want to upgrade to the...

Is CircuitPython supporting use of both M0 processors? How is (or will) concurrency and synchronization managed?

Did you create a "portable" Arduino IDE and try installing Teensyduino into that copy? That ought to be the simplest way to get Teensy working. To fix this problem affecting all Arduino copies with any board, you'll...

Wow! Well thought out reply! You make a very strong case against. All practical and honest reasons. Using an RPi or equivalent is much more logical indeed. But you busted my widdle bubble. :) :) I get these...

Linux on Teensy would be somewhere between "not worth the incredible effort" to "pretty much impossible". There is no MMU, so you're immediately resigned to not-so-useful ucLinux. The best case (but unlikely)...

This reason why I showed this is because I can not compile anything. Due, Uno, Teensy, nothing. When I select Teensy 3.1/3.2 and try to compile I get the exact same message.

@MarkT : Are you suggesting to integrate the analog output of the APD and sample it at a slower rate, like maybe once every 200 ns (5 MHz rate)? I suppose that could work but the internal A/D has a 1 MHz sample rate...

Visual Source Code doesn't work for you?

A clue: my DAC sees an interruption in toslink output. Perhaps the audio PLLs get reset?

Each of the 8 PWM slices have two channels for output. They share a divisor so they'll share frequency but have separate compare registers. So, 16 is fair I think. I've had a couple RP2040s for a month or so and...

Yet another update - programmed 3 chips today and soldered them to virgin boards. The bootloader comes up and works with Teensy Loader, but still some issues remain with booting up in certain cases. Still more work to...

Sounds reasonable. The bus clock changes.

Don't see set_arm_clock() disabling interrupts - but clock and voltage changes might cause chip interruption/stall to DMA or other timing/processing?

No, thank YOU for posting it.

Thanks for taking care of that. Good solution.

How many LEDs is this? Is this a huge project with 400 long LED strips? Or just 400 LEDs total?

I think so, too. https://github.com/PaulStoffregen/Audio/pull/378/commits/dc9b15b5d8625d3b08327b744c185ae968f969ef

I don't think it is necessary to change any source code. It would be nice to include it in errata documentation somewhere if an errata exists. I just reversed things in my project code. I pointed it out so it might...

Audio uses its own PLL.. hm. interesting... wonder what the reason for the glitches is.

Unfortunately, it creates audio glitches if one switches back and forth.

Thank you tonton81, I am so stupid, I could not see the whole codes but stuck around CAN setting. must correct basic logic coding part first before asking question.....

Look at the upgrade_firmware() routine and add code to open the file and read characters from it instead of the serial port. Others can say more about how to use the SD card.

Maybe you don't need to overclock it all the time? You can adjust the speed at runtime. Sorry, wrong thread here.

Yes, I have been running it at 750MHz super stable, but decreased longevity https://www.nxp.com/docs/en/nxp/application-notes/AN12253.pdf worries me a bit.

@ bvernham your Screenshot shows you are compiling for a Arduino Due? That's *NOT* a Teensy.

You can try to overclock the T4 - with a good cooling, it can do more than 600MHZ - but at some point it will become unstable.

Thanks! I couldn't quite figure out if that was possible or not with the Flasher4 library. Would you happen to have a quick summary on how to do that via the SD card? I've been messing with the example file and reading...

extern "C" uint32_t set_arm_clock(uint32_t frequency); void setup() { set_arm_clock( 912000000 ); } ...you will notice, it shuts down due to "Temperature panic" after a some time.

What was the conclusion on this? Is there an easy way to jump to 912 Mhz for a brief period?

And it is 5 times as useful :-) Seriously. I am making project that requires LOT of horse power and will probably use 5 or more Teensy 4s. And I need bare metal, so Linux based things like Raspberry Pi are not an...

Teensy 4.0 better be better, since our retail price is 5 times as much!

You can easily write code to load a teensy .hex firmware file from an SD card (or modbus) if you use the Flasher4 library.

+1. and 600MHz T4 is even better :D There is detailed chart on page 180 of reference manual for F401. FIFO has four 32-bit words that can act as 16 bytes or 8 half-words (16-bit).

A claimed reason for the pico is that linux (used on their other models) isn't good at real-time I/O. But all they had to do to fix that was change the OS to leave one core completely untouched by linux and so...

Follow these instructions: https://www.arduino.cc/en/Guide/PortableIDE The very first step says "a compressed version of the Arduino IDE according to your OS", which for Windows means you download the ZIP version...

I believe the real lesson was learned by that guy who tried to launch the $9 "C.H.I.P." board.

With all delays equal and the time always monotonically increasing its a simple queue, I would use a circular buffer with the reference (pointer) to the head which is the next element to remove, and another reference to...

Interesting. How large are these buffers, and how many?

It does. Page 166 and page 180 of STM32F401 Reference manual: "Four-word depth 32 first-in, first-out memory buffers (FIFOs) per stream." FIFO in STM32F401 is universal that handles not only I2S but ALL streams....

It sounds like the Pi foundation learned their lesson from the Pi Zero.

Note, I2C is a shared bus. Each I2C device has an address. This means as long as your OLED display does not use the addresses used by the audio shield (0x0a, 0x1a), you can hook the display on to the same bus. There...

PS I can't compare any boards on the non APP version but I only need the non App version for Teensy boards.

SFE will sell you 100 at $4/each

How do you create a "portable folder"? Don't put it in "program files"?

The latest one of the web site.

Though given the price, I wonder if we are going to have the same problem that we have with the Pi Zero? Namely, you can only order them in limited quantities, and the sellers had times when they had no stock to sell....

Maybe not. the multiple satellites are from different constellations, i think the gps solution probably uses no more than 12 satellites, though it's able to choose from a larger collection of strong signals.

Wow, you have a very strong signal there. It should be easy to pull HDOP out of GSA, it's already parsing that message.

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 the RPI forums:...

As noted it is 'code' and indicated by FrankB - from raspberrypi.org/documentation/pico/getting-started/

Nice. Here is graphic data from T4.1 connected to sparkfun GNSS NEO-M9N with external antenna mounted on windowsill. M9N can use up to 4 constellations (GPS, GLONASS, Galileo, BEIDOU). PPS To GPS: 134 ms...

(Also interested in this)

Got it work with 10microsecond delay @ 150 MHz :) Thank you! I see now, that i have choosen the wrong approach. Should really use higher speed displays.

Like everyone else I have been wasting the morning grubbing though the Pico docs and ordering (and pre-ordering) various bits and pieces. Early impressions: Dual M0s - meh. Real Documentation! It's kind of a "Green...

General Purpose Input/Output (GPIO) is used by the Programmable I/O (PIO) It don't mention any FIFO for the I2S module @ STM32F401 and it also send data in 16bit frames Reference manual:...

Any word on power draw? It's ussually very hard to beat an AVR at low clock frequencies.