That little circuit board looks like a 4 port USB hub.
I would recommend first testing your code with a regular consumer USB hub plugged into Teensy 4.1's USB host port using the regular USB host cable, and the 4...
Please reply with this as a complete program I can copy into Arduino and upload to Teensy 4.1 to reproduce the problem. Even if the rest of the program is "trivial", please eliminate the guesswork needed to reproduce...
EXTMEM String only causes the String pointer to be placed into PSRAM. The actual character data still goes into RAM2.
Maybe we should add code in future versions which check for this at runtime (adding slight...
Yes, MAX9722A looks like it should work. Use 5V to power it.
You'll probably want to use a dual pot with audio taper as a volume knob for one of the resistors on each channel. Probably set the max gain to about 1.0...
Sadly, using 2 audio shields is more difficult because we lost the ability to configure the I2C address with Rev D2. Fortunately chip shortages are getting better and Rev D will return in a couple months.
You can...
I'm not sure why this code isn't working. But I can at least answer this:
No, the ethernet PHY chip isn't configured at boot. It doesn't get any configuration at all unless you run one of the libraries which...
For the sake of testing, I would eliminate the uncertainty of external power and use a short USB cable connected directly to a PC or powered hub (which should be able to output 500mA) and connect the display's +5V power...
I'm trying to follow your wiring in the photo and match it up to this Adafruit info
https://learn.adafruit.com/adafruit-led-backpack?view=all#1-2-inch-7-segment-backpack
Looks like you might have an external 5V...
I need to update the web page, yet again. In early 2021 all TLV75733P disappeared from the market. Robin bought a large amount just before they vanished, but the shortages lasted longer. In late 2021 we were forced...
Glad it's working.
Can you give any info about who sells this SD adaptor? I see it has marking HW-125, but no other info seem to be visible in the photo. Any info (as searchable text) about the make, model,...
You might need to use slower SPI clock. I don't know much about that specific SD adapter board, but I see it has a buffer chip and resistors. Often these boards with buffer chips work on regular Arduino board which...
Line in, line out, and headphone out all work simultaneously on the audio shield. The headphone output and line output get the same stereo audio. Internally, the audio shield as a stereo ADC and stereo DAC. The...
Glad it's working for you.
@ckahlo - Any feedback on the program from msg #9? Does it meet your needs?
Teensy Loader does not have the ability to create .ehex files. Only teensy_secure can.
Teensy...
Usually measuring such low resistance means the short is metal. Usually when a chip fails, the semiconductor gives a strange reading which depends quite a lot on the test current and range of your multimeter, but...
You don't really need teensy_post_compile. It's simply the command line utility which Arduino IDE runs to inform (GUI version) of Teensy Loader the filename and directory where it compiled your program. You'll be...
Yes, this is normal. "TTL level" serial signals are "active low". When idle, the pin is supposed to be logic high. The start bit is always low, the data bits are either high or low, and then the stop bit is always...
Indeed 1.18 is from before I started really using github. At that time, Teensy 3.1 was the latest hardware. Latest Arduino IDE was version 1.0.5.
I found a copy of the 1.18 source in my old files archive. Attached...
That is very strange. I don't know what's causing this behavior. Could be you've found a subtle bug in the USB Serial code. Could be a subtle issue with the Audio library, or something in your program. Sometimes...
With all power off, can you try an ohms measurement from VHOST to GND? Then try again with Teensy 4.1 running a program which doesn't use USB host?
On a good board, the power off measurement should show a gradually...
Looks like the AudioSynthWaveformModulated documentation (right side documentation panel) wasn't updated. It does indeed have the same bandlimited options as regular AudioSynthWaveform, even though they're not...
Oh, I see now you're using FreeBSD. Only Linux, MacOS and Windows are supported. Almost nothing is published for FreeBSD. Building up a minimal system is theoretically possible, but as a practical matter requires...
I know you said no Arduino, but the simplest way to get the toolchain is to install Arduino 1.8.19 (the old version) and then run the Teensyduino installer which adds all the Teensy stuff to it. If you're absolutely...
That breakout board is wired for Rev B or Rev C. At the time it was made (mid 2019), Rev B was the latest version.
Rev D won't work (unless wires are used to route the signals where needed).
This error means your variables + code are too large for RAM1.
Try adding DMAMEM to one of the large arrays, like this:
DMAMEM float fftinL;
float fftinR;
When ORD is 32768, each array takes 256K.
Before you pour a lot more time into custom python code with DIY udev rules, only for the sake of troubleshooting I'd recommend testing with Arduino IDE serial monitor using the PJRC published udev rules. Make sure...
The pathname looks as if trying to use the files meant for Arduino 1.8.19, but you have Arduino 2.1.0. The Teensy package is slightly different for Arduino 2.1.x than it was for Arduino 1.8.x. Even though the code is...
Use of "ATTRS{serial}" restricts this udev rule to 1 specific Teensy board. If you plug in a different Teensy, even if it's the same Teensy model, it will have a different serial number which causes this overly...
Indeed, the original design goal was for all instances to be static. The main issue with deleting instances is the input queue can "own" audio blocks at the end of an update, which then get used on the next update. ...
Quick look at the MCP4822 datasheet says it has an internal 2.048V reference, and you can select either unity gain or 2X gain output. So the output range ought to be 0 to 2.048V or 0 to 4.096V. Does not seem to be any...
While something is clearly wrong, perhaps good news is this looks different than the usual destroyed Teensy (typically from touching 5V or higher power to 3.3V which destroys the main U1 chip). A normal destroyed...
Here is a teensy_secure build for Windows. So far this is untested. Please let me know if it works for you?
Usage: teensy_secure encrypthex <board> <file.hex>
teensy_secure encrypthex_unlocksnvs <board>...
Which operating system are you using? Or in other words, if I were to compile a test copy of teensy_secure, which platform should it be for easiest testing?
Your program is using the MIDI library, which receives ordinary serial MIDI (5 pin DIN connector).
To receive USB MIDI from your computer over the USB cable, use "usbMIDI". Documentation here:
...
In Arduino, click File > Examples > Teensy > Serial > EchoBoth. Change the baud rate from 38400 to 31250 and upload.
Optional, add the Hello World stuff, so you can be sure it is really running.
Does it print...
When you see it print Hello World, the next step is to add something like this:
void OnControlChange(unsigned char channel, unsigned char control, unsigned char value)
{
Serial.println("received CC message");
...
Add this at the end of setup(). Or anywhere in setup()...
Serial.begin(9600);
while (!Serial) ; // wait for Arduino Serial Monitor
Serial.println("Hello World");
This won't fix anything, but it will at...
As a first troubleshooting step, I'd recommend printing to the Arduino Serial Monitor so you can see the actual number before your code tries to send it to the MCP4822.
Something like this:
// Map the CC value...
Opps, yes, indeed I meant configure the I2C address.
Rev D (with configurable I2C address) will return within the next couple months. Robin & I have been putting a lot of work into the supply chain side, so...
This should be possible if you use both I2S ports.
The first I2S port has 5 data pins, so it can do up to 10 channels. 3 of those data pins can be either input or output.
The second I2S port has 2 data pins, so...
First step would be checking if it responds to I2C with the expected address. The main gotcha is it won't answer unless MCLK has a clock signal. So you can't just run the Wire library Scanner example.
With Teensy...
Looking at the ADS8168 datasheet (admittedly only a quick glance), I see 2 pins for data output, but only 1 pin for data input which is indeed separate from the output pins. My impression from Figure 42 on page 31 is...
Please be more specific. At the very least, show a screenshot similar to msg #3. If your screenshot doesn't have footer, please say which page number and the version of the document (ideally use 3.3.1).
My best guess is you're asking for teensy_secure to give an optional command line parameter which generate CSF data with the same output as NXP's Code-Signing Tool would if given the "" command with "Engine = SNVS" and...
Can you be more specific? At the very least, can you give a link to the Analog Devices web page or datasheet (so we don't have to guess the last digit). Links to eval or breakout boards would also be good, for anyone...
As a general rule of thumb, higher resistance pots consume less power but give a weaker signal which results in noisy data. So you would normally want to use lower resistance for better results, but not too low that...
Yes, it is possible. But the ready-made configurations you can select from the Tools > USB Type menu have 4 or 16 virtual cables. To get exactly 5, you'd need to edit the USB code. Probably best to use 16 and leave...
I know you said you've tried different USB cables and hubs, but the behavior you're describing sounds pretty similar to what many others have seen with low quality USB cables.
Usually the cable is believed to be...
@ted - Could I talk you into running this little program on both of those chips and share the results here?
void setup() {
Serial.begin(9600);
while (!Serial) ; // wait for Arduino Serial Monitor
...
Thanks for confirming your experience with these chips. Several people have asked about these wide temperature chips over the last couple years. Testing them has been on my low priority to-do list, but the higher...
Many LEDs with different controller chips have sold as "WS2812B", since they first appeared on the market around 2011-2012. Most of the ones from 2014-2016 really did require nearly 4 volts to receive as logic high. ...
Try cleaning the area around the crystals with 99% isopropyl alcohol. Cleaning the whole board might also be a good idea, if the solder paste you used left a thin layer of conductive residue (many solder pastes have...
Yes, for Teensy 4.1, 4.0, 3.6, LC. If you have a serial signal that transmits 5 volts, it needs to be shifted down to 3.3V before connecting to the receive pin because those Teensy models are not 5 volt tolerant.
If you're using "breadboard wires" which have little pins crimped onto the ends, you might spend a moment with an ohm meter to check if they really do conduct. Those products tend to be very cheaply made. The...
Another interrupt can occur after the 2 second delay but before you call millis(). It can also occur in what should have been the final moment of the delay, causing the CPU to run your interrupt and only later return...
Depends on which Teensy model you're using and what CPU speed (as set in the Tools > CPU Speed menu before uploading). On some boards, also may depend on the pin, as some pins use different timers with slightly...
This thread is 8 years old, back when Teensy 3.2 was the most powerful model.
If the info and code on this old thread didn't help, you're probably better off to start a new conversation specific to the problem...
Yeah, a lot of the USB info is difficult to understand, partly because the USB specification is intentionally somewhat vague in many places to allow implementations a wide degree of freedom for design choices.
Common...
The PWM hardware runs from the peripheral clock. The hardware is only capable of adjusting the pulse width by integer number of steps of the peripheral clock.
At those ideal frequencies the PWM period is exactly 2^N...
The screenshot is very odd to me too. I've never seen the IDE do anything like that.
Maybe if you fully delete the IDE and setting and then reinstall, it might magically work?
I see in msg #1 you're using...
The "I2" part of I2S and I2C stands for Intra-Integrated circuit.
I2S isn't really meant to be used over any sort of cable. It's meant to connect between chips on the same printed circuit board, or perhaps an...
To use this ALPS EC12E encoder with Teensy 4.1, I would recommend connecting terminal C (the center pin) to GND. Then connect each of the other 2 pins to a 6.8K resistor connected to 3.3V. Or if 6.8K is not easily...
Luni is correct. This type of encoder is simply mechanical switches. By itself, it doesn't output a particular voltage at all. It simply connects or does not connect either or both of the signals pins to GND.
The...
Removing and replacing the main U1 chip on Teensy 4.1, even with the same part number, will not work. The fuses are initialized during product testing at PJRC. A different chip won't have its fuses set properly.
...
Glad you found the problem.
Yes, that seems to work. Easy to see the full 64 bits really are compared, and nice to see the compiler makes use of the IT (If Then) instruction for efficient usage of the CPU's...
I can take a quick look. But only quickly.
Please give me a link to your github repository? If it has more than 1 branch, tell me exactly which code I need to check out.
Please also be specific with exactly...
Code in msg #19 is not a valid test. The compiler is able to notice variable b was assigned from variable a, so it knows they will always be equal.
Looking at the generated assembly, loop() has only 1 conditional...
The ethernet hardware on Teensy 4.1 uses a ring buffer and bus master DMA, similar to traditional ethernet on PCs. So in theory you can have any number of sockets. But as a practical matter you'll be working with the...
Hmm... maybe we have a bug in the CardInfo stuff? It's supposed to detect the hardware regardless of whether the card has a proper partition table. But maybe we've lost that with the change from old SD to SdFat...
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