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OK let's see if Paul happens to stumble in that thread then. I suppose it would need a reboot of the Teensy, but that should not be an issue here. I did not get what you meant in your edit, sorry... :confused:

Regarding the cpu usage: It depends on the configuration (constructor arguments) of the class. The class has the same arguments as the AsyncAudioInputSPDIF3. I just made some test to determine the typical range of of...

Thanks for the suggestion, but in this case I only have on e USB port and don't want to add a hub into the design. The data is packeted, so I can implement a mux/demux to combine the data into one USB stream. Thanks.

Thanks Paul. Since it's clear my initial plan won't work, I can look at alternatives. Combining the 4 serial port data streams on the USB host and using one SerialUSB on the teensy and demuxing them is an option. ...

Thanks a lot Paul. I can access this forum without VPN now.

Here is the new full-model filter, which for now I've called AudioFilterLadder2. It's based on Huovilainen's full model, presented at DAFX 2004. Below are the filter_ladder2.cpp and .h files if you would like to try it...

Thanks for the suggestions. I've managed to get a 2x over-sampled version of the new model (which I'll describe in the next post) sounding as good as a 4x over-sampled version for all intents and purposes, so I don't...

Hi Blakaddr,, sorry, I was only trying to get people to think, apparently I missed some parts looking over the schematic. The IRU LDO specifies an output capacitor with a minimum of 10uF, the text suggest to use...

I haven't used interrupts much as I wanted to go as fast as possible. I am sampling at a specific rate, so I poll on ARM_DWT_CYCCNT, which increments every CPU clock cycle. It takes about 4 or 5 clock cycles to sample...

button chatter, debounce needed. anyways, better to set state to the gpio result (HIGH (1) or LOW(0)) then set digitalwrite the state, that should solve that problem state = digitalReadFast(interruptPin);

Could I get a little more of a hint please? I am getting 0.5 microsecond interrupts, but shorter than that doesn’t work. Using the TeensyTimerTool. Thank you. Terry

So change of plan. I changed the encoder library from encoder.h to Rotary.h and added debounced the button inputs. This is what I have so far. Havent loaded it yet, Probably wont get a chance to do that until...

Well that certainly seems to work. But now I'm curious as to why toggling state has issues. :D

Instead of toggling the state, you could actually read the state of the input pin -- then your state would never be out of synch with the switch/

It's those little details that get me to. You know, the obvious ones that are so obvious you never notice them until they bite you:) Anyway tonight I will download your latest and hopefully this weekend I can play with...

Okay, I think we've made progress. I changed the library file so that it points to FXOS8700_I2C_ADDR3 instead of FXOS8700_I2C_ADDR0 and that bit works. I also did the same for the FXAS21002 and neither throw errors....

Wait nevermind it works, but it actually seems to be slower than before... I was clocking at about 500Hz for uploading, and now I'm only reaching ~330Hz. Delaying the flushes doesn't seem to work either, as it just...

Digital isolators, not opto-isolators. They are 1Mbps and up and logic inputs/outputs. They are becoming affordable and available in a mix of directions per chip. For instance:...

The T4 configures the GPT and PIT to clock at 24mhz, if you configure for 150mhz it will break the interval timer (PIT). here is example of GPT running at 150mhz...

I've updated the Teensy 3.2 page, under Power > VIN Pin, with a link to this thread. Hopefully if anyone else cuts the trace and needs to repair, it will help them find this info.

Perfect, now I'm having issues locating the SD card though. It keeps saying the card can't be located, but also BUILTIN_SDCARD isn't recognized. Is there a new variable that's used?

It found a chip with address 0x1F. From within the library: #define FXOS8700_I2C_ADDR0 0x1E // SA1 = Gnd, SA0 = Gnd #define FXOS8700_I2C_ADDR1 0x1D // SA1 = Gnd, SA0 = Vcc #define...

Yes. Or just run the Arduino installer again. It will automatically uninstall before installing the new copy.

Oh ok help says 1.54 beta 4 is installed, I notice you have a note about installing on a fresh arduino if I had this version previously. Should I uninstall and reinstall arduino then?

This is the serial output of the script. I assume the unknown chip is the IMU. Scanning... Device found at address 0x1F (unknown chip) Device found at address 0x21 (MCP23017,MCP23008,PCF8574) done

After downloading, you do need to actually run the installer. Quit Arduino before you run it. If using Windows with Arduino installed the default way (the EXE installer, not the Windows store app) just click Next in...

Haha that's actually the link I used, I'm on windows so I just clicked the windows link there at the top and followed the download procedure. Did I have to uninstall my old teensyduino before or something? Sorry if...

Get 1.54-beta7 here: https://forum.pjrc.com/threads/66357-Teensyduino-1-54-Beta-7

As I understand it, any of the TMC drivers that can run on 3.3V or 5V are affected by it. PFET is not a bad idea at all. I've been through a lot of TMC driver datasheets (2208, 2209, 2130, 5160) and did not see...

I've been trying to update to 1.54 beta but I can't seem to find it in the list of installable versions on the arduino IDE. I tried searching online too and downloaded teensyduino 1.54 beta but it still says version...

I'm a little confused by your message. Are you saying that bluetooth data does stream into a USB controller, and that whether or not it uses up bandwidth that's shared with a given USB device depends on whether that USB...

Hi Edwin, thanks for the feedback. I've tried to answer all your questions comments below. "In the schematic I see failrly low values of capacitors on the outputs of the voltage regulators, specially the LDO's...

You need to call Teensy3Clock.set() somewhere to update the RTC

First run File > Examples > Wire > Scanner to check which I2C devices are really connected and what addresses they are actually using.

First, upgrade to 1.54-beta7, if you haven't already. The old slow SD lib is gone, now just a wrapper for fast SdFat. You may need to use IntervalTimer to run your code that collects incoming data, so it can...

It depends. A typical modern PC might have 14 USB ports (including internal ones on motherboard headers), but only 3 USB controllers. Generally speaking, all the physical ports from the same controller share USB...

I did notice somewhere in the LiquidCrystalFast code something like: digitalWrite (pin, HIGH) ; // pulse for at least 450ns digitalWrite (pin, LOW) ; which will obviously break on the T4 which can do those...

You are flushing every sample to SD card, flushing may involve several segment writes, segments are 512 bytes each. Better to flush regularly in time, such as every second, than every sample.

This sounds like a job for digital-isolators, galvanic isolation for motor drivers is good to have anyway.

MicroMod adapter boards for all teensy models would be a nice thing. (as long I don't need to solder the connector ;-)

So it still needs some work but this is what I have now: #include*<Encoder.h> Encoder knobLeft(8, 9); // Declare pins we will use for encoders Encoder knobRight(11, 12); void setup() { pinMode(0,...

Ah. Good to know. I don't foresee using a speaker on this as it is steering wheel for controlling an online racing Simulator called iRacing.

Well one off the wall thought is to add a UART to USB converter and use one of the hardware serial ports. In theory, something like: ...

Does anybody know if these issues also effect the TMC2209? I've integrated a few of them onto a PCB with all the rest of my needed circuits. I can see how to add circuits to deal with the issues. If possible I don't...

I don't know. I haven't tested these ancient LCDs in quite some time. I wrote LiquidCrystalFast over 10 years ago, when we only had slow 8 bit boards. It was designed to get the best performance on that hardware. ...

Thank you for your answer. What a coincidence: I am using the GL.iNet GL-MT300N-V2 as well. :-) My problem was that I did not know that I had to install the appropriate driver in order to be able to talk to the...

Resampling for inputs is a good thing. Have measured how long it takes? (cpu usage) How much memory does it need? Would it work if I set the sampling rate of the library to 48k (or perhaps 96k) ? Could the code...

Hello Edwin. Thanks for the good tips. I will check it. Greetings. Rolf

It looks like you have a nice project going on there, nice video's on youtube.... In the schematic I see failrly low values of capacitors on the outputs of the voltage regulators, specially the LDO's usually require...

I installed Wireshark. Thanks again. Did not know that it can monitor USB traffic, too. Oh my... that allows to look at other devices, too...

Kurt is right. The Teensy 4.x hardware simply does not support enough endpoints to add a 4th CDC serial. But it could be done on Teensy 3.x. Each CDC serial needs 2 endpoints (1 bidirectional data, 1 unidirectional...

Oh bugger. Looks like I need to come up with another plan. Lets see what Paul can add. Thanks.

Sorry, this is probably a question that maybe only Paul can answer, But my gut tells me that you may not be able to do this. That is the IMXRT1060RM section 42.2.1 mentions: Up to 8 bidirectional endpoints per each...

Yes its basically a striped down version of the PRO IDE. which uses ardunio-cli

Note pin 26 (A12) is also a dedicated analog pin. From a coding point of view, it doesn't matter which pin you use. Note, you might want to use A10/A11, and reserve pin A12 if you ever wanted to add sound effects. ...

Thanks, I used a level shifter for all the pins to be safe, but it is good to know that only 1 level shifter is essential for the RW pin. Am I correct in my assumption that there are some compatibility issues with...

I'd also really like to see a MicroMod version. There would probably be enough real estate to include at least one of the memory pads from the 4.1.

Perhaps the Pi doesn't have the needed USB serial driver installed. There should be a device like /dev/ttyACM0. You might also need to mess with stty to configure it or use a terminal emulator like screen, picoterm,...

Thank you for the responses!

First a word of caution. These displays usually run with 5V power. Of the 32 bit Teensy models, only 3.2 and 3.5 are 5V tolerant. The 6 signal mode is safe, because all 6 signals are always in the Teensy-to-LCD...

Not all of the chip's pins can come to the outside pins on Teensy. Some are connected to the ethernet and flash chips on the PCB. Some aren't connected to anything at all, only because it's not physically feasible to...

I just switched between using LiquidCrystalFast and LiquidCrystal for the 2 types of pin configurations below: #include <LiquidCrystalFast.h> // initialize the library with the numbers of the interface pins...

Thanks, Michael. I believe those pins are unpopulated as well. Is it simpler to use a dedicated analog input pin? I was planning on using pin 26(A12) because it is right next to the power and gnd pins and that...

See code below for the I2C/SPI setup. It is currently set for I2C, you can see the SPI pins used below the I2C comments. There isn't much to it, all the work is happening in the library: /* Demonstration sketch...

Aargh and :D Sometimes it is the simple things! Like the right number of msc objects! I pushed up a change in my temporary branch... Sorry in this push, that I removed compiler stuff for MSC examples and...

Because the pins are needed for other things. Usually I2C chips support different adresses, so for most applications three busses are enough. Other things are important, too.

If your board hasn't used them, there are also pins 24/25 which are analog input only pins (A10, A11) that are on the inside row of pins (pin 25 is next to pin 21, and pin 24 is next to pin 22). You would need to...

I2C is a rather slow bus. You might be able to boost the speed of the bus by setting the I2C speed from its default setting of 100Khz by using the Wire.setClock function, but it depends on whether the device can go at...

Recently, I was able to build and run teensy_loader_cli for OpenWrt 19.07.7 running on an GL-iNet Mango GL-MT300N-V2 Mini Router. As I mentioned in another thread, I'm able to reprogram the Teensy over the air, but...

You haven't posted your code so we can't see where the problem is. You also need to show the connections you are using as there's more than one way to connect and some are inherently slower. The particular module is...

I've done something like this with plain serial. It's a little wonky if the serial port also has all the console messages. You can disable the console messages, but then debugging the system gets harder. What I do...

So I downloaded Teensyduino and Teensy Loader and got them installed but......Oh, no. It turns out the source code cannot be read once loaded onto the Teensy. I did not know that. So change of plans....I guess I will...

If speed is not paramount you could consider a PCF8574 I2C 8 bit expansion chip. The current per pin is 25ma with a total of 100ma for the package. There are also 16bit versions viz MCP23017. This latter chip being...

Thanks Mark. Given that I have a dozen of these and the duty cycle could be high, I will plan on using something in-between the T4 and the Opto to be safe. I could use a simple NPN transistor, but I am considering a...

I just got mail that the Gamedunio 3X Dazzler with a Teensy specific shield for Teensy 4.0/4.1 is now available: https://excamera.com/sphinx/store.html#gameduino-3x-dazzler-for-arduino-39 Here is the Gamedunio...

After taking the advice to upgrade to the beta7 version the code compiles as fine as powder. Big thanks @@mjs513 @KurtE for the extremely fast reply and the advice, you guys are awesome.