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Thanks for the tip! It seems it's not necessary to connect the extra GND ans 3v3. The noise and other problems I had (working for a few seconds and then dying) were because of my inexperience on soldering something this...

Thanks for sharing your expertise GremlinWrangler. It's nice to have peace of mind. I had considered it but I'm only doing the predictable rainbow effect there, leds are only roygbiv colors, 25 on each. The rgb's are...

Ok, so after reading your last post several times, i think I understood about 50%. LOL. So basically, this is where I'm at currently. (just to clarify so everyone is on same page) I have 1 finished display. It is...

Hi Crees, When using these settings: int unsigned UNIVERSE_COUNT = 23; //How Many Universes 8, 8, 8, 4, 8, 8 int unsigned UNIVERSE_LAST = 22; // List the last universe typically its sequencially from start but...

Hi Tim, your PCB looks great! the software and hardware is in a preliminary stage at this moment. We (FrankB and Frank DD4WH) are busy with other projects at the moment (T4 and ultrasound recording), so this...

Hi Kevin, nice to hear that you are working on your Teensy Convolution SDR! No, unfortunately, we have not yet produced a PCB design for such a motherboard. But you may consider Bob Larkins´ very nice approach: ...

Pull request completed for a micros() based on CycleCounter extension of millis() systick_isr :: github.com/PaulStoffregen/cores/pull/330 Looks to be about 30 added lines if anyone cares to check my work :) ...

Hi Crees, many thanks for helping out! Did not have lot of time to investigate last days. The only thing I was caning was indeed this 23 universes. int unsigned UNIVERSE_COUNT = 23; //How Many Universes 8, 8, 8, 4,...

There are a bunch of potential issues as you note having LEDs doing PWM on the same system as audio. One useful element here is that both Teensies are actually running at 3.3V from internal regulators, so as long as the...

as teensy is very fast, put a delay(100) after wire.begin to let I2C settle before reading/writing. maybe this helps.

Each integer is 4 bytes. But you're writing them every 1 byte in the EEPROM, so 3 bytes overlap with others you're writing.

Nope but but perhaps you may want to consider other ways of doing it. Serial is great but maybe not the best for what your trying to do. You will find some limitations especially if you want to run high FPS. Not...

So I take it that was a dumb question...?

Default settings used for all PDOF(6) except for the column marked PDOF(2) was curious what kind of performance improvement we would see if it was changed.

OK, got Ethernet (wiznet 5500) to work on Teensy 4. To eliminate vtable error had to copy teensy3/IPAddress.cpp to teensy4/. Here are my results from beta7 with Kurt's SPI FIFO lib. Speed of wiznet Ethernet will be...

What is the clock setting in your table for first T4 column? I thought default was PODF(6)??

I dug into the data sheet and the ADC has a differential input mode which is perfect for this application. I have no idea if the library code supports this hardware capability. If not, you will have to figure out the...

I got it working, but was still having some tonal quality issues and then had to put it down for a while. In the meantime, the Audio lib has been updated with a pitch shifter that works pretty well. It does have...

So, theoretically speaking, if we run Teensy 3.6 at 240 MHz, we can compute that a single tick would be 4.1667 ns. If we used the newest overclocking scheme, which can get us to 256 MHz, that drops to 3.9 ns per tick. ...

If I was to offer some advice; Making the sounds is easy. Sequencing and pattern sequencing to a high resolution is full of challenges. Can I suggest for Phase 1 - you make the device send midi events out over...

Thanks. I really appreciate it and understand the overload that happens. Yup, I know about "in hardware" (my area) but software "NOP" tuning can work in tight loops so I don't see it as a no-fly zone. Once had to...

Sorry, correction to the above post, it’s a 5v tracopower regulator.

Man, that would be so awesome! Any guidance as to where to look for the details would be appreciated. Of course, the ISR would have to be fast enough, and as it stands, with my clunky bit-banging to get around...

Hope he feels better soon - just got over a something that kick my you know what - tell him get lots of rest and drink lots of fluids. And feel better soon.

Paul's been a bit under the weather the last day or two, so development progress has slowed down while he tries to rest up and not get any worse.

I've sent you a Mail.. could have posted it here too, it was less than expected :) Yes, you need DMAMEM - or just use malloc. The heap is in OCRAM now - like DMAMEM. Good night.

Hi Frank, It would be great to take a look at your code... I have some stuff started, but not yet tested. My library can (or at least used to, but I have not tested it out for awhile), do autorefresh... That...

Paul, any news RE:Audio ? Or are you working on something ? I'd try audio, then...

ADAFTUIT MOTOR SHIELD V2 LIBRARY Ok. I picked up another Adafruit v2 motorshield that I modified for 3.3v and hooked up a stepper motor. The shield is unique in that it uses I2C for the control of the motors so I...

Kurt, you have mail.

hardware dma is pretty easy.. i have 32bit dma now. can send you some code, then you can use it in your lib.. better when all is in one place :) is it possible to use the "autorefresh" with your library? (and if it...

This has been a huge help thank you, I was having issues with adjusting an audio delay due to the jotter in the pot, this smoothed it out perfectly.

oh i'd like to help, but I'm busy with T4 :) a hardware-timer is for sure better than micros() or millis() or counting cycles.. this can all run "in hardware". never use software for exact timing.

At exactly what point does MIDI.read flip from true to false. I tried monitoring the value Midi.Read() at various places in my code but its always 0. even at teh start of my callback (void HandleSystemExclusive) ...

So I think my problem is resolved for now. One key piece of information that I was missing was that the orientation of the Pushbutton matters!! I did not realize that a 90 degree rotation of the 4-pin Pushbutton...

You should be able to get the timer working - IIRC, using the Teensy 3.6 clock and counting cycles will get you 4 ns precision at 240 MHz. I've thought about creating a nanos() library, similar in functionality to...

Oops, of course. I knew I was missing something obvious. Time to take a walk. Thank you for your time.

I want to have a separate teensy with three usb connectors one for regular usb and onther twos for i2c to connect it to other modules, they wont be far a way from each other. And I want on the teensy some kind of...

Thank you for your response! The pins could be contiguous - avoiding those that are "blocked" by legacy Arduino stuff the audience out there would need. I have used pins all in a row in my previous "how fast can it...

With the modulated waveform, pulse width is controlled by the input signal. That's why there's no function to control it. You could always do something like connect a DC synth object to the modulated waveform's...

@mjs513 - Glad you got it working! I should have done like the last posting and put in links to each of the github projects/forks... Hopefully @Paul will pick up the SPI PR as well as the CORES PR for SPI soon... ...

So, it’s been awhile, but I finally got a chance to try out the technique referenced in Post #2. The Audio System connections look like this: The blocks labeled “modulatedDelay1” and “modulatedDelay2” perform...

I have not really taken this much further as I have had other things to do first. Basically the circuit is super easy. The teensy is powered from a 3.3v tracopower 1A switching voltage regulator to the VIN and GND pins....

@KurtE Ok that got it - used wrong branch the ding bat that i am. Anyway now it works like a charm. Just for comparisons at this point i updated the benchmark table that i generated earlier, post #827. Big...

Ok, consider my SPI problem as solved/not existent.. All the time I was testing (+ LA on clk) with a SD-Benchmark. Was too lazy to write my own short test. I wrote a minimal example now, that uses SPI.transfer with...

Which SPI fork did you sync up to? It should be: https://github.com/KurtE/SPI/tree/T4-SerialFlash-fix And if anyone else wishes to try it out: https://github.com/KurtE/SPIN/tree/T4_WIP and...

I forgot to say that the version are: for arduino is 1.8.8 for Adafruit_RA8875 is 1.0.4 for Adafruit_GFX is 1.3.6 teensy is version 3.6

@KurtE Ok just downloaded latest updates to SPIN and ILI9341 WIP libraries as well as redownloading your SPI fork just in case. I am still getting that pin 10 is not a valid CS pin and I changed to your pin...

@manitou Nope. You are right the Quadrature encoder in the SDK uses the XBAR pins so the I pins have to be redefined, XBAR is an alternate pin configure. That's why I was asking about reconfiguring the pins.

I just put this hack into both libraries and I think things are working pretty well now... I also enabled some of the Frame buffer code in this library, where you can turn on frame buffer, do all writes to it and then...

The FIX: copy teensy3/IPAddress.cpp to teensy4/

The EVKB SDK had an encoder example (which I believe you tested on the EVKB) that used the XBAR to map GPIO pins to the Encoder A, B, and Index inputs. In fact, i don't think the T4 encoder peripheral has any defined...

Good Morning Mike, Yep - it is still a bit flaky... I think it still has to do with my CS pin handling. What I saw the hardware CS pin used for DC looked pretty solid. I think I am going to try another hack for...

Jumping in this thread because I was having a similar issue and figured I shouldn't create a separate post. Just a couple of days ago I was trying to get MIDI-in working with the 6n138 and schematic posted below (Teensy...

Since we are talking about the daisy register one of the perfect uses is when sharing the SPI interface. Let’s say the MISO pin of one device cannot tristate (damn them!), you can share the SCK and MOSI pins, have...

Morning Kurt Tried that pin configuration as well - will put it back just as a double check. Funny thing is when I used the adafruit version the follow construct would work: Adafruit_ILI9341 tft =...

not familiar with the j1939 protocol itself, but theres 2 libraries available for teensy 3.6 FlexCAN_Library and IFCT. You might want to search github for “J1939 arduino” or “J1939 teensy” to show what shows up. If you...

If it can be useful, I can provide a little Arduino sketch showing how to receive MIDI from usbMIDI, checking for the CC of your choice and using the CC value for whatever you want. Once you have that integrated in...

HI Frank might help to see what you are doing? Do you have some example code showing what you are doing? Are you trying to do standard polled input and output or are you trying to do use DMA? Again I am still...

yeah the daisy register is a mux that the peripheral talks through, and that mux has the path to one of the X pins of the actual pin the hardware is attached to. when changing pins for peripherals its a good idea to...

@mjs513 - On my test code - I have CS=9, DC=10, reset=8 and then the normal 11-13 for other SPI stuff... Currently It is on wireless breadboard as the breakout board does not have all of the signals... As...

it is safer and stabler as they work on different voltage by datasheet. If you don't shift the level, you have to take your own risk that they don't work as intended By far I didn't meet any level-related error by...

Question No takers on this question or did it get lost with all the other messages :)

OK， thanks a lot. It's really knowledge of 7th grade. It's calculated as below: cycles = 30ms / frequency 0.03 / (1/697) = 21 0.03 / (1/770) = 23 ........ 0.03 / (1/1477)=44

Thanks for all the help so far. I think I have a better understanding now. One oither thing. Is it possible to extract the FULL/WHOLE midi buffer in 1 go? I think all we've discussed so far allows reading of a...

@KurtE Downloaded the lastest (as of tues 07:30 EST) and ran problems. But first - to get the rest of the tests delete you wait for input code then the rest of the code works. Ok. Nothing gets displayed but looks...

sorry I know my answer is a little late but I think there is a new version VisualStudio 2019

You probably need to go into more detail of exactly how you will interconnect things, with pictures showing the teensy and the other devices (and list what those devices are). In general, it is simplest if all of the...

hopefully you managed to get the colours in the right order now. Regarding the text element, there is code around for displaying text on led arrays. This uses an array to hold char values. are you talking about this...

In the meantime a re-tested the serial MIDI IN to serial MIDI OUT, connecting the OUT to a real MIDI monitor and not only to my musical expander and it proved to send out any sort of garbage too. So I can assert that...

Good to know - I did that in the end when I thought I was ready to merge and saw the pull change. My refined and well tested though not very big change for micros() that was working to have the old and new micros...

ok, so how exactly should I record? should I ground the inputs? or just mute them/ set to minimum input gain?

hehe! nice

Hi Paul, thank you very much for your deep analysis and suggestions! Yes, I start thinking that is an hardware issue... especially now that I ha read your posts :rolleyes: Mmmm, I built the MIDI interface...