Nucleo, Discovery, and ST's other loss-leader products are precisely the reason why you're not going to see independent hardware vendors who actually invest in independent software development support ST's chips.
Your schematic shows C4 at 4.7 uF.
But the equation on page 4 in the CS4334 datasheet seems to say that capacitor ought to be in the 4 to 6 nF range. Probably also wants to be a NP0 ceramic or good quality plastic...
Yes.
As the readme says, there isn't much documentation. But if you look at the code, you'll see bootloader.cpp is a driver for Teensy's HID bootloader, and ihex.cpp reads the HEX file from the SD card to program it...
Take a look at lines 1312 to 1315 within the font rendering code.
https://github.com/PaulStoffregen/ILI9341_t3/blob/master/ILI9341_t3.cpp#L1312
You can see "height" is initialized on line 1271, by simply reading...
Some minor details...
1: which of the 5 fields are treated as unsigned vs signed numbers
2: how to do the bit packing (LSB first vs MSB first)
3: where the character is rendered relative to the cursor X,Y...
Here's a quick explanation to get you started. But I want to emphasize you'll probably need to look at the code and do some experimenting to fill in the details. Hopefully you'll have time to post followups here on...
Before we get into the finer details, maybe info from these prior threads can help?
https://forum.pjrc.com/threads/39804-ILI9341-font-builder
https://forum.pjrc.com/threads/39113-Tft-T3-Fonts
...
Here's a demo which can give you an idea of the maximum realistic number of interrupts per second, and some techniques to maximize performance.
This is the original thread which prompted making that video.
...
Ok then, this thread will go on the list of stuff to investigate more at a later date.
I've tried to catch up on the forum and missed emails over the last couple days, while waiting for a T4 board rev (which allows...
Please test with another PC. I'm pretty sure this problem is happening entirely on your PC, since you're getting correct waveforms recorded from Teensy when viewed in Audacity, and I can't reproduce it here when...
This doesn't make any sense.
That USB audio adaptor is a USB device. USB devices can only be plugged into USB hosts or hubs, where the hubs plug into a USB host. You can't plug a USB device into another USB device....
Sorry, I can't do *anything* with Mac or Windows until at least next week. Remind me after Tuesday, Nov 20th.
Usually I can do quick tests with Linux and only small hardware, because my desktop runs Linux. To do...
Well Theremingenieur, I believe you know how I do things and how this forum generally works.
Especially with a thread like this involves (maybe) different issues that manifest with similar problems, there's always a...
Here's the image what should have been attachment 15150. Dunno why the forum sometimes gets attachments missing.
In these 2 quick tests, I run the code you provided in msg #44 on a Teensy 3.6 and used Audacity...
In File > Preferences, try turning on verbose output while compiling.
Arduino will print lots of info. Near the end is a summary of exactly which pathnames it's using for each library. Perhaps you have an old copy...
I ran one more quick listening test, using this cheap USB audio adaptor and good quality Bose AE2 headphones.
Again, Audacity played back the sine wave without any strange clicking noises, except a slight pop at...
I tried it just now, but could not reproduce the problem.
I ran it with Ubuntu 18.04.1, Linux kernel 4.15.0-38-generic.
To test, I uploaded the code from msg #44 to a Teensy 3.6. I set Tools > USB Type to Audio. ...
First, make sure you're using the latest software. In Arduino, click Help > About to check. If it have less than Teensyduino 1.44, upgrade before doing more trials.
If Windows has messed up, maybe try selecting...
I ran it here too on a Teensy 3.6 using Arduino 1.8.7 with Teensyduino 1.44. Touched a wire between pin 0 & GND dozens of times. Always the same correct result.
I can tell you the PJRC bootloader does not modify your HEX file. But there is special handling of the FOPT & FSEC bytes.
Earlier versions on Teensy 3.0 & 3.1 (using the MINI54 chip) would disregard whatever your...
I can tell you the bootloader will NOT work with the MK66FN2M0 chip.
Regarding porting all the code we publish to this chip, most of it should work but "the devil is in the details". We don't support the MK66FN2M0...
When you say "have same problem", does that mean you're running the *exact* code from msg #1, using those 2 WAV files, and you're observing the exact same wrong waveforms on your oscilloscope?
If *anything* is...
It depends on what you've selected in the Tools > Ports menu.
The Tools > USB Type menu also comes into play if you select a non-Serial type like MIDI. In those cases, HID protocol is used to emulate serial and no...
I'm pretty sure it will work perfectly fine, if you power that IR module from Teensy LC's 3.3V pin and connect its output directly to a digital pin.
It's great that you're reading the datasheet and asking questions...
I have this thread on my list of stuff to investigate.
T4 is consuming almost all my dev time right now. Might be a few weeks or more until I look at this.
Bidirectional level shifters, especially the ones with 1 mosfet transistor and 2 resistors, are horrible for WS2812. They have different speed for rising vs falling edge which distorts the signal which is terrible for...
DMX kinda sorta already has started to move to Ethernet, as E1.31 or Artnet protocol.
The 100 meter length and galvanic isolation of Ethernet transforms makes a lot of sense for lighting, especially compared to the...
Maybe in some distant future stage lighting gear will all migrate to CAN bus. But the reality of today's market is DMX, which is 8N2 serial at 250 kbps.
Yeah, it does appear as if the UART is doing so sort of internal initialization that takes approx 1 byte time. Or maybe it's related to the idle detection time? I really do not know. To be honest, this is an aspect...
I believe the problem is ultimately due to a limitation in the UART hardware. After initializing the hardware, it seems to spend 1 character time doing some sort of internal initialization before anything you're tried...
You should *not* connect those class-D amplifier outputs to anything other than a regular speaker. They output waveforms similar to PWM. The idea is the speaker is basically a big inductor, since it's a coil of wire...
In theory you should be able to just turn the volume almost all the way down with the pots connected to the inputs. But that amp has so much voltage gain that only the first few degrees of the pot's rotation might be...
Yes, I let it play for several minutes. After a couple hundred plays, I really had to turn the speaker off.
I tested by connecting the DAC pin directly to the cord which runs to Aux input on the front of this...
Yup, all the pre-3.0 boards had really different pinouts. The consistent feedback we heard was a desire for the boards to be pin compatible. Starting with Teensy 3.0, we tried to standardize the pinout for all Teensy...
I'm running it here on a Teensy 3.2. It makes a 90s-era business phone ringing sound every 2 seconds. It rings every time. Hasn't stopped even one over the last several minutes.
I edited "TeensyAudio.h" back to...
In C & C++, a union means you can access data as more than 1 type. It's still the same binary data. Usually it's used the way you have it, to access the raw bytes.
union {
float fData;
uint8_t bData;
}...
I'm deeply skeptical of this. 150 us is pretty much forever in the context of this sort of code!
But the cold reality is I'm going to ignore this unless you post a complete program I can run here on a Teensy to...
Indeed this chip has a lot of tough challenges. With the Kinetis parts, even when the chip is held in reset, the MDM is accessible by SWD protocol. The ARM core and stuff on the PPB are also accessible, but all access...
Teensy has a feature called elapsedMillis, which is meant to make this sort of code simpler.
https://www.pjrc.com/teensy/td_timing_elaspedMillis.html
Of course you can use the Arduino millis() function, but as...
I'm not sure yet either!
But I do know we'll begin beta testing with the 1052 chip, probably next month. We already have a couple hundred 1052 chips for betas sitting here in a box. Before we do much with betas, I...
Every peripheral has a clock gate control. If the clock is turned off, any access will fault, even just trying to read the registers. Normally all this is handled by the HardwareSerial classses. But if you access the...
Please install a newer version of Teensyduino. You have 1.41. The latest is 1.44.
Windows will usually assign a new COM port number to each Teensy. So if you have selected COM9 and it works with your first Teensy,...
Is this problem happening on Mac, Linux or Windows? Which version? And which version of Arduino & Teensyduino are in use? (to check, click Help > About, or if using Mac, Arduino > About) And what's selected in the...
Sure. The easiest way is to just run the Teensyduino installer, then help yourself to the code in Arduino's hardware/teensy folder.
If using a Mac, control-click Arduino and "Show Package Contents", then look for...
I have a test machine here with Windows 10, but I'm not really a Windows user. I most use Linux. I have no idea exactly what to do for this:
Maybe you could give some screenshots or photos of exactly what to...
Was some other power source connected to the LEDs?
If the LEDs had 5V power and you accidentally touched Teensy's 3.3V power to the 5V power from LED, that 5V power applied to the 3.3V pin would instantly destroy the...
It really should not give negative numbers.
Maybe there's something about your code? Just a blind guess, since I can't see it.
If the program isn't a proprietary secret, maybe post it here? Or if it a a...
Showing the complete code that reproduces the problem (eg, the "Forum Rule") would be the thing missing here.
But I say that setup() function looks fine. Problem is probably somewhere else only you can see.
I just can't understand how that's even possible. The 1.44 installer has 2 copies of Print.h. One is for Teensy 3.x & LC and gets installed in the "teensy3" folder, the other is for Teensy 2.0 & ++2.0 and gets...
If you delete just that 1 file, then run the installer again, does it manage to write the 2017 copy? Or do you get the old one again? Or no Print.h file at all?
And question 2: did you ever have an old copy of...
This is the most bizarre problem I've heard in quite some time.
Any chance you could make a ZIP file of everything in C:\Program Files (x86)\Arduino from the affected Win 10 machine and upload the ZIP file to some...
The audio library has code for controlling and using a CS4272. Maybe that part is similar enough to "just work", or maybe work with only minor edits?
https://www.pjrc.com/teensy/gui/?info=AudioControlCS4272
The 2 DACs built into Teensy 3.6 are the easiest. You can use them with analogWrite() or the audio library. They're only 12 bits, but very easy because you get an analog signal right at the pin without any extra...
Maybe you've discovered a previously unknown bug in the library. Or maybe something's simply wrong in your code?
Either way, to get help you need to show a complete program which reproduces the problem (the "Forum...
This is an issue common to all native USB boards. If something goes wrong with the code on the board, such that the USB isn't working, then your PC can't see it.
Every Teensy has a pushbutton for exactly this...
Wow, that's strange. My only guess is somehow your installation has been corrupted in some we that's hard to imagine.
Which version of Arduino and Teensyduino are you using. In Arduino, click Help > About to check....
Your AudioEffectDummy.cpp neglects to check whether inBlock is NULL. You *must* check this. You will sometimes get NULL, especially at startup. You will memory fault the CPU if you use a NULL pointer with transmit()....
Block processing also gives us great compatibility with other libraries and code using interrupts. Details vary depending on which inputs & outputs you choose and how much of the total CPU time your processing uses,...
Good question. The flash looks like about 20K remaining, so it's going to be close when you bring in the SD library and Audio library.
The WavFilePlayer examples compiles to about 31K. So the question is how much...
Sure. Use the audio library. Almost all the examples are for I2S, but it's easy to change them to use the DAC.
Using the design tool, you'd import the audio stuff, replace the I2S output with a DAC output, and...
Do those sockets really work?
I mean, when you try to pull the chip, those machine pin sockets usually hold a pin very tightly. I suppose if you insert a tool between the chip and socket and pry gently and grip the...
Some time ago, I added lines into Teensyduino's platform.txt file to automatically generate .sym and .lst files while compiling. The .sym file will give you the addresses of all functions and all global and static...
Yup, that's how it works.
The audio library has *lots* of optimized code with these sorts of tricks to process or copy 2 samples at once, or sometimes 4, 8 or even 16 samples within 1 iteration of a loop, using 2, 4...
Every Teensy 3.x board has a unique serial number. The udev rules are very flexible with many features, including ways to assign different names or to automatically create symbolic links based on properties like the...
First, double check you have installed Teensy's udev rule file. Earlier I assumed you had done this, because ttyACM0 was giving you permission to use it. But maybe something else is causing that?
This is the udev...
Maybe it's showing the 2 different reports from the HID descriptor as 2 devices?
I'm afraid that will be more work, might not even be possible. I'm not sure. But to work on this you'll need to dig into the HID...
Yup, this review looks encouraging.
https://www.amazon.com/review/R12F7RYUKPCQX7/
Sadly, hub manufacturers almost never label their products about which protocol their hub uses. Usually the only sure way to tell...
On Linux, you can check your hub type with "lsusb -v". It prints way too much info, so first run it without "-v" to find the vid:pid. Then run it with "-d" to look at only that device.
For example, on my PC there...
Any chance you're using a Single-TT hub, or plugging them in directly?
12 Mbit/sec devices will usually only share 480 Mbit/sec bandwidth properly if you use a Multi-TT hub.
Here's a blind guess... maybe you're writing code to talk to the port, rather than using the Arduino Serial Monitor?
A common problem people encounter is the "line discipline" setting. You need to turn this off,...
I'm pretty sure they added the 12x12 size because they heard from customers (much larger than PJRC) that the 10x10 requires a more expensive PCB process. Early on I mentioned this to their marketing manager. He was...
Just to be clear, those /dev/ttyAMA ports are Raspberry Pi's hardware. They're the serial pins on the 40 pin header. If you're programming Teensy to communicate on Serial1, Serial2 or Serial3 and you've connected...
You could also try running your program with sudo, so it has root permission. Not great security practice... but if it works you can at least get through the demo tomorrow.
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