The USB power goes to a 3.3V regulator on the board, so 5V power from USB doesn't kill the board. At least not unless you do something like touch a wire between VIN and 3.3V.
Technically, it's supposed to be possible. But this is one of hundreds of things I've not yet actually tried.
If you look at figure 30-1 on page 1477, you'll see the diagram showing the flash arbitrator which is...
Maybe. I believe the way the ESP folks do this involves a partition setting, where a portion of the chip is set aside for filesystem and can't be used for code.
I'm going to consider this sort of thing much later,...
Definitely not using Hyperflash. The chips are physically too large to fit and they're far too expensive. Performance wise, they only help if you have a huge program where you need a lot of code that executes directly...
Regarding the new hardware, there's a consistent theme of "it's complicated"....
Yes, the flash memory is 4 bit QPI DDR clocked at 60 MHz. So the raw data rate, minus command overhead, is 60 MByte/sec. When...
Yes and no.
Yes, an upgrade will happen eventually.
But no, not "anytime soon". Definitely not before Teensy 4.0 is released.
An update to the arm_math.h library (aka CMSIS-DSP) will probably happen before the...
Have you tried that problematic board on other computers? Ideally you might trying Linux or a Mac, if you have access to any such machines. That might help you to know whether the problem is on the Teensy side or the...
More likely explanation would be clicking the "skip" button in the installer on the driver step, or when Windows asks you to confirm you want to install the driver, clicking the cancel button. Either of those would...
Every brand new Teensy comes running HID protocol, not serial. It only becomes serial once you upload a program. The Arduino upload is able to find the HID device and automatically upload to it (using the Windows HID...
Pretty sure this would happen on Mac and Linux too, if you force quit or "kill -9" the java process.
I rewrote teensy_ports for 1.44, using stdout rather than a localhost socket. It's no long able to detect when the...
I'd bet Per knows the answer. Too bad he's not on this forum. If you post on Arduino's forum he'll almost certainly see your question.
If you post over there, maybe put a link to this thread in your question, so...
Classic buffer overflow bug. The array is only 7 items. When you write to the 8th location, you're overwriting whatever other info happens to be in the memory after the array. Not good.
When you ask a question about a particular library or example, please be specific with a link to the exact code, or a copy of the code if it's not readily available on a website.
I have published hundreds of...
If you're looking for this to run optimized, might be a good idea to change sqrt() to sqrtf() and log() to logf().
Normal sqrt() & log() without the extra "f" use 64 bit double, which is much slower than 32 bit float.
The short answer is no, nothing is really finalized. In some sense, it won't be truly "final" until we're shipping the actual products.
I'm a bit reluctant to share too much at this stage. Months ago, I really was...
I have a bookshelf filled with ready-to-go hardware for most of the commonly used Arduino libraries, so a test just running the examples is quick & easy!
This really should be able to work with that length wire, as...
I found 1 of the green clones. Plugged it in and ran WebClient again. Works fine.
Looking at the clone, I had never noticed it has a LED on the bottom side of the board. Let's see if I can get a quick photo...
Ran the Webclient example just now on a Teensy 3.6 with a genuine WIZ850io using Arduino 1.8.7 and Teensyduino 1.44. Works fine. Here's a screenshot.
Here's the hardware on my desk.
Nothing special here,...
I've put this on my list of stuff to look at for 1.45.
Please understand I am currently only working on very serious bugs at this time. All other dev cycles are going to the new hardware for early 2019.
The...
Maybe you mean MAX232?
The genuine (expensive) MAX232 from Maxim and a workalike from ST that we used long ago on the 8051 dev board (before Teensy) would put out about -9V to -10V when powered by 5V.
You could...
I'm going to guess you'll probably see -5V to -12V on pin 2, maybe around 0.25 volts on pin 3, and of course pin 5 should be very close to 0 since it's GND.
When working properly, both pins 2 and 3 should have -5V to...
Do you have a DC voltmeter? Can you measure the voltages on pins 2, 3 and 5 of the RS232 connector, with the meter's negative wire connected to Teensy's GND pin?
An update for Teensy LC and 3.2 to add the 15 second button press and a couple other minor features is definitely on my todo list.
But he says he's got a Teensy 3.1. PJRC discontinued 3.1 years ago, and 3.0 was...
I've committed the fix on github. The fix will be in Teensyduino 1.45 later this year.
https://github.com/PaulStoffregen/cores/commit/c425ecbd0a529b14bc05664bf96d5c0e9413825e
You might need a 3.3V to 5V level shifter between Teensy and the LED strip. Some strips can accept 3.3V signals. Others are more picky and only work with 5V signals. Some of those strips will work with 3.3V if you...
Ok, here's a fix. Copy this to hardware/teensy/avr/cores/teensy3.
Indeed the problem is Serial1.end() isn't clearing error status bits that can result from additional bytes (or garbage - like bytes at the wrong baud...
After much fiddling, I believe I've managed to make this highly reproducible.
Defragster, Microderm, can you run this code on your boards and check it reliably gives this result?
It should always stop with...
I'm working with this again today. Running a trimmed down version of the code from msg #23.
After watching this waveform over and over, the problem appears to happen when the enable signal goes low during a time...
Agree, you should use *real* serial ports.
SoftwareSerial is full of hidden problems and unpleasant surprises when you try to use multiple serial ports. SoftwareSerial appears to work flawlessly when you test with...
I believe they were on this thread.
https://forum.pjrc.com/threads/50537-preparing-audio-with-wav2sketch-getting-error-message-in-terminal?p=172945&viewfull=1#post172945
I don't fully understand the context of this question, but I can try to answer "who does that".
Normally if you'll use the pin for digital I/O, you would use the pinMode() function to first configure the pin. The...
https://www.pjrc.com/teensy/schematic.html
PJRC doesn't sell the MK64FX512 chip. You buy that from a distributor like Digikey, Mouser, Arrow, etc.
The two 144 pin packages (GBA & LPQF) have been tested. Look...
To make your own PCB that's fully compatible with Teensy 3.5 and works with Teensyduino, you need this bootloader chip.
https://www.pjrc.com/store/ic_mkl02.html
While this message isn't "legal advice", the other...
Wow, lots of questions. Let's see if I can get them quickly...
The plan (where "plan" is a rather strong word....) is what I call "low priority". That really means it may be years until it happens, but a more...
The answer to your last question depends on the signal type.
The signals at Teensy's pins are called called "TTL level" serial. The signal is high when idle.
RS232 signal levels, commonly used on 9 pin D-sub...
First, you *must* cut the VUSB-VIN pads apart on the bottom side of the board, if you will ever plug the USB cable in while the battery is connected. Even if you believe you would never do this, I recommend cutting...
Maybe a HCPL-263L or two HCPL-260L could meet your needs?
https://www.mouser.com/ProductDetail/Broadcom-Avago/HCPL-263L-300E?qs=s%252bgfxR24RQ5Mzfnn5S6rIw%3D%3D
...
I added the enable wire and I'm running the code from msg #23.
It seems to be reproducing the problem, but I'm out of time for this today. Will look at it in detail early tomorrow.
For Teensy 3.x analog inputs, usually 5K or 10K pots are best.
Normally pots have 3 pins.
Maybe you could be more specific, like links to datasheets or product pages for these ones for a 4th pin? Maybe others...
There are 2 issues.
1: The most serious is if you program FSEC to disable access to the memory and to also disable mass erase. When you press the Program button, the MKL02 chip (not MINI54, which was used on the...
Orange and yellow wires are wrong/swapped at the WIZ850io in the 1st photo, but correct in the 3rd photo.
RST isn't connected. I've used the genuine WIZ850io without it, but this board looks like a clone. Maybe you...
Looked at the code just now. Should work fine on Teensy 3.2. It only uses pinMode, analogRead, Bounce, Joystick which all work on 3.2 exactly the same as on LC. I don't see anything that would "need to be corrected...
Try running "tail -f /var/log/syslog" in a terminal. This will let you see the Linux kernel's log messages. Every USB connect & disconnect should show something. If you get nothing, plug and unplug other USB cables...
Try the recovery process, where you hold the button while plugging in the cable.
https://www.pjrc.com/teensy/troubleshoot.html
As a last resort, especially if using Windows, reboot your computer and do this from a...
Sadly, it seems I didn't get the 2X oversampling quite right inside the state variable filter. It has stability issues when run at those extreme settings (high corner frequency and low Q/resonance). This is on my low...
Yes, to use Wire3 on Teensy 3.6 you would need to edit this in WireKinetis.h to uncomment the WIRE_IMPLEMENT_WIRE3 define.
// Teensy 3.6
#elif defined(__MK66FX1M0__)
#define WIRE_IMPLEMENT_WIRE
#define...
Teensy 3.6 is currently the only model which supports USB host.
You'll also need this cable and 5 pins of a header to connect it to your 3.6.
https://www.pjrc.com/store/cable_usb_host_t36.html
This cable is...
By "double start", maybe you mean "repeated start"?
With the Arduino Wire library, you accomplish a repeated start using Wire.endTransmission(false).
https://www.arduino.cc/en/Reference/WireEndTransmission
Of...
I can't really diagnose this Mac performance problem, but I can tell you from quite a lot of experience working with receiving the USB serial data on both platforms, at least that part uses relatively little CPU time on...
Please be careful.
If you both erase and write the sector with the flash config bytes, and you choose the wrong number you can permanently brick your Teensy.
The default security byte is programmed so you have to...
Generally ceramic capacitors are best. But not all are created equal. They have 3 digit codes which technically are a temperature spec but can be thought of as an indication of the capacitor's quality. NP0 & C0G mean...
Yes, Serial1 & Serial2 have FIFOs for lower interrupt overhead, and more efficient block write to the transmit buffer. For megabit speeds, these make a huge difference.
They'll also help at lower speeds, especially...
Either way, for transmit-only communication the consequence of not keeping up will be small idle times and not managing to fully utilize all of the 31250 baud bandwidth. You won't lose anything, as can happen when you...
Usually you can use either GND or AGND. Sometimes AGND will be better, so best to use AGND unless you have some reason to use GND.
Often there's no difference, so if you have some need for GND, using it is fine.
...
Yup, that's definitely a problem.
But it's not as terrible as directly connecting 2 logic outputs together, because the Octo board has 100 ohm resistors with its outputs. Without those resistors, there's a pretty...
I do have 2 macs with bootcamp and images of various installs of Windows, which I restore to the bootcamp partition with Winclone so I can test stuff with specific versions of Windows.
The point of these questions is...
Is this the correct program?
https://www.thesycon.de/eng/usb_descriptordumper.shtml
It appears to be for Windows only. Is there a Macintosh version you're running?
(can you see how you're making me try to...
Periodic list size is a false path. Larger list size is needed for very slow polling, not faster.
If you want to investigate further, I'd recommend enabling the debug printing in USBHost_t36.h. Then uncomment this...
Usually these sorts of problems happen when GUI-based software tries to redraw a window or do some other heavy GUI operation for each individual message. Often the best solution is to freeze the GUI and process all...
Linux names the port /dev/ttyACM0.
/dev/ttyS0 is almost certainly a (non-USB) serial port built into your PC's motherboard.
With all Linux systems, the first thing to double check is you've installed the udev...
If you want, I will make one more test run and post another screenshot.
But I'm only going to do 1 more if it doesn't show any issue, so make this one count. Please provide a complete program here for me to copy...
Each installer only recognizes a few versions of Arduino. The supported versions are shown on the first page (which nobody reads) and the website right below the download links (also a place people don't usually read)....
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