Maybe you're using an old version of Teensyduino or the audio library? Or maybe you're using the quad I2S? Or maybe something else is wrong and you're assuming this is the problem?
Long ago the stereo I2S input was...
I just wrapped up the 1.44 release.
Will put this on the list to investigate for 1.45. Any info about steps to reproduce this would really help. I don't actually use Windows much, so I'm really depending on...
Yes, but only as 2 small pads for D+ & D-. There isn't room for a 5 pin header as on Teensy 3.6, and we're not putting the host current limit switch & capacitor on the board (because there also isn't room, and to keep...
Even Teensy LC would be able to do this at about the same speed. If this is all you need to do, there's no need to spend extra for a 3.2 or 3.6.
For Teensy's part in this system, you can expect an average of about 1...
Looked at the datasheet just now. It doesn't give specs for Vih (minimum voltage for logic high) and doesn't say whether the inputs are CMOS or TTL levels. So whether it can reliably received 3.3V signals when running...
I see many links on that page, but none appear to be for a download of any library. If I click "rosserial_arduino" I get another page without any download, but there's a link to...
Whether you need extra buffering really depends on the type of input.
The ADC and I2S in master mode don't need extra buffering, because their input is controlled by Teensy's clock.
If you're receiving packets by...
Please give us a link to the code that doesn't work with newer versions. I want to try it here, so please help me with specific info about exactly which example or program I should open in Arduino and click Verify to...
As nearly as I can see, the answer to all your question is that *you* need to craft more code to solve your problems.
To keep 2 different parameters, you would need to add code to create 2 variables and manipulate...
Maybe you could be more specific about "really fast"?
Unless you write very inefficient code, both are capable of moving USB serial at ~1.1 Mbyte/sec (the limit imposed by the USB port at 12 Mbit/sec). Both are...
Why are you unwilling to test with the latest software?
On Windows, you can have more than 1 copy installed if you use the ZIP file (not the EXE installer). Just extract the ZIP file, and remember the location. ...
Confirmed, Ethernet 2.0.0 auto-detects the chip. No changes are supposed to be made.
Regarding this:
If you use the old library published by Wiznet (definitely not Ethernet 2.0.0 - their's says 1.0.0 even...
Please use 1.43 or 1.44-beta.
The Ports menu was redesigned in 1.42 to better show Teensy when it is operating in non-serial modes.
It's also possible something has gone wrong with your Teensy board. But before...
Eventually the flash memory will wear out, but that should be after at least 50,000 uploads.
Teensy Loader actually has a safety feature built in, where it will disable Auto mode if another upload is attempted too...
Please only send me that code if it is MIT license, which is used for the Audio and USBHost_t36 libraries.
A lot of example code published by silicon vendors has a license that only allows use on their chips. The...
Last year a group of students (who I advised) did a project to add this sort of sample-based (or "wavetable") synthesis.
https://github.com/TeensyAudio/Wavetable-Synthesis
Recently I've been merging this into the...
To connect a USB MIDI controller directly to your Teensy 3.6 (no need to route data through your PC), you'd use this cable and the USBHost_t36 library.
https://www.pjrc.com/store/cable_usb_host_t36.html
This cable...
Could be. Or it could be something else not "playing nice with others" on either side, maybe something as simple as the clock signal being driven as output instead of open collector? I agree the fact that the I2C bus...
Have you tried asking on Adafruit's forum? TinyWireM is their library.
I looked briefly at the ATtiny85 datasheet. I don't see any mention of multi-master arbitration in the USI chapter. But it does at least...
Yes. Those types are physically very slow. Nothing you can do in software will change that hardware.
The size isn't the same, but you might consider a color TFT is about the same price and requires fewer...
Another option would be to use this circuit with the FreqCount library. But this will give you half the count, since only rising edges are captured. Pulses very close together could be handled well, so maybe half the...
If the time between pulses is more than about 200 ns, you could add a flip-flop circuit to help Teensy run an interrupt. For example, this chip might work.
...
Pretty sure consumers listening to recorded music and musicians performing & recording are considered very different markets.
Nostalgia can be tricky. Only a few decades ago consumers were satisfied by vinyl records...
You'll get exactly the same compiled result, since digitalReadFast() is optimized by the compiler when the inputs are constants. But if you *really* want to hard-code registers into your program, here's a tutorial to...
Going to guess this is one of the normal character displays that works with the LiquidCrystal library?
LiquidCrystal has 4 different constructors. The 6 pin one is safe to use with Teensy 3.6, because it never tries...
Every brand new Teensy should blink when it gets power, even if there's no USB communication.
As a quick test, can you use a voltmeter to measure if there's power at the VIN pin, and 3.3V pin?
You need to add this in your setup() function.
if (!(SD.begin(SDCARD_CS_PIN))) {
// stop here, but print a message repetitively
while (1) {
Serial.println("Unable to access the SD card");
...
64 bit double should have plenty of numerical precision for this filter.
If you're using an AVR chip, double is actually only 32 bits, with 23 used for the mantissa part. That might not be enough for the...
USB is filled with lots of lingo having very specific meaning, sometimes not so obvious from the choice of English words. For USB audio, please refer to page 19. Here's a direct link to the "USB Device Class...
Probably won't work.
For interrupts, the minimum pulse width is 50 ns. See page 18 in the datasheet, "General Swithing Specifications"
https://www.nxp.com/docs/en/data-sheet/K66P144M180SF5V2.pdf
The timers run...
When/if an audio driver gets written, in some glorious future where we have EHCI isochronous pipes, there's also the question of which of the 3 isochronous rate feedback mechanisms to support. If we only support...
So far, USBHost_t36 only supports 3 of the 4 USB transfer types. Someday I'll add isochronous, but it's a *lot* of work since the transfer descriptors are totally different from the other 3.
Without isochronous pipe...
Seeing something like /dev/bus/usb/001/023 is the correct behavior when the Linux kernel doesn't have the cdc_acm driver, either built in or as a loadable module, but the kernel does have the usbfs driver.
Since...
Maybe this can help?
https://www.jetsonhacks.com/2017/11/19/install-ttyacm-module-nvidia-jetson-tx-development-kits/
The command to type may be "./installCDCACM.sh", rather than "./installCDCACMModule.sh" as the...
Encoder is more reliable when both pins are interrupts.
Do you have a Teensy board? On Teensy 3.x all the digital pins have interrupts, and on Teensy LC most of them do.
Windows Update finished. Now I'm at 285.
Ran Arduino 1.8.7 with Teensyduino 1.44-beta2. Uploaded the WAV player example to a Teensy 3.6. Everything seems to be working fine. Here's a screenshot.
Something...
These are very old. Teensyduino 1.42 brought huge improvements with how Teensy boards are detected and shown in Arduino's Tools > Ports menu. 1.44-beta1 made even more improvement, but only improved speed and...
Which version do you have?
In Windows, click Settings > System > About and scroll down. My Windows 10 machine says version 1803 and OS build 17134.254.
In Arduino, click Help > About. The Arduino and Teensyduino...
I have put this on my list of bugs to investigate & fix.
Sadly, there won't be time to get a fix into 1.44. Will probably get this into 1.45 in December.
First, fix this:
static int pinA = A12; // Our first hardware interrupt pin is digital pin 2
static int pinB = A13; // Our second hardware interrupt pin is digital pin 3
Pins A12 & A13 are analog only pins on...
Which version of Teensyduino are you using? Click Help > About to check.
Version 1.42 and higher do a much better job of showing you all connected Teensy devices, even if they're not running USB serial.
Yes, that's correct.
The mosfet source and the NPN collector are both connected to 12V. There is literally no way to connect to one without also making a connection to the other, since both go to 12V. But the...
No, not like that. Connect to the collectors of *both* transistors. As drawn, it's connected to the collector of the NPN 2N2222, but connected to the emitter of the PNP 2N2907. That won't work. It must be connected...
Yes, the decoupling capacitor is between +12V and GND.
But really, think of the capacitor as connected to the collectors of those 2 transistors and the mosfet source pin. During the fraction of a microsecond where...
Try this. I made it up just now... but pretty sure it'll help. :)
If you don't have 2N2222 and 2N2907 transistors, substituting 2N3904 & 2N3906 might work but with reduced drive to the mosfet gate.
The 10...
I've replaced the TeensyduinoInstall.linuxaarch64 file. The copy uploaded earlier today was uncompressed, over 200 megs, with MD5 hash
e5a581533a397f42c67650be529eb3d4
The new compressed file is ~78 megs, with...
Which version of Processing and MacOS do you have?
My testing Mac has 10.13.6.
I recently updated movie2serial.pde for Processing 3.4. Please make sure you have the latest version.
If that doesn't do it,...
You could use 3 filters and a mixer, like this.
3 biquad filters are probably the most flexible way. The biquad filter as a convenient functions to set high and low shelf responses. (right side panel - scroll...
You definitely need a driver chip between the Teensy and that mosfet's gate.
The difficult part is you have a P-channel mosfet. Pretty much all the gate driver chips are designed for N-channel mosfets.
If you are using Macintosh and already downloaded Arduino 1.8.7, please be aware a wrong Mac download appeared on Arduino's website for a few hours. It's been replaced with the proper file now.
The correct MD5 hash...
Pretty sure these are bots. cherry1810 is from an IP at BraveWay LLC in the Netherlands, GloryNash is from an IP at LogicWeb Inc in Chicago. Both companies appear to be server hosting only, not end user ISPs.
If...
Yup, this sort of thing happens when 1 LED fails and no longer transmits data to the rest of the downstream LEDs on the same strip.
Often it's not the actual LED, but a loose or broken connection between the LED and...
Whew, lots of questions.... let's see if I can get them all quickly....
This is very likely a problem with the code. No matter how fast the hardware updates, you need good animation code to actually achieve...
Yes, this is correct.
Arduino doesn't give you Mouse.moveTo(), do they?!
Teensy's mouse supports both relative movement and absolute position. Being able to move to an exact absolute position on the screen,...
For 500 LEDs, a single strip with 1 pin using any of the libraries should work.
Most modern WS2812B strips can work with a 3.3V signal. It's not ideal. But then neither is the LXM0108 chip, which is very sensitive...
With Teensy 3.6, no need to fiddle with the timer registers. All you need is this:
void setup() {
analogWriteFrequency(3, 10000000);
analogWrite(3, 128);
}
void loop() {
}
Are you using LM324 or LMV324 (as in the schematic)? They've very similar, but LMV324 can't use power higher than 5.5V. If LMV324s were powered from 9V, replace them with fresh chips!
The first half of your circuit...
I tracked the remaining Mac menu slowness to this function in Editor.java.
public void menuSelected(MenuEvent e) {
List<Component> components = Arrays.asList(fileMenu.getMenuComponents());
if...
If you've never used Arduino, the very first step which you can do before buying anything, is install Arduino and Teensyduino.
Then run Arduino, and click File > Examples > Teensy > USB_Keyboard > Buttons. That will...
Testing now with 4 windows open on a Macbook Air, I'm seeing the Tools menu seems to be respond rapidly. So do all the others, except File. The first time I bring a window to focus, I get a Mac beachball for about 1-2...
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