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Looks like it could be it. Suddenly I got a weird effect: Both MK20 on 2 different boards assembled by 2 different people get suddenly
hot whenever powered is applied. There are no shorts on the...

After following all advice on board design for a custom Teensy board and using exactly the same parts
used on the teensy, I have trouble getting my Custom Board running.

If I press the PROG...

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Here is an image of mine, btw :)
I will beta-test on the weekend.

I just received my Teensy-LC and I'm wondering which version of Teensyduino supports it.
Any start tips, Paul

Sounds good to me. I would also like to see a mixer, which can be controlled by separate inputs instead of setting gain (VCA-alike).

I received my Tracking Code from Robin yesterday. I will let you know when it arrives and then I will give it a testimonial :)

Thanks Paul for including me on the list! I always have time for some beta testing.
I live in Europe, Germany. Let me know how we can make it happen. Maybe the Teensy-LC
would be also interesting...

Things verified so far:
- VDD/AVDD is stable and at 3V3 (checked with oscilloscope)
- All components are correctly soldered
- No bridges on pins are present
- Target answers now (SWD), but...

What I only see for now as a difference: I don't have any connection to VBAT.
Is the connection to VBAT from VDD really required?

Hello,

I have made a custom board based on the MK20DX256, as an alternative to the teensy for one of my projects.
Instead of the MINI54TAN, I am using the SWD-Interface of the MK20 to program it....

I still have trouble getting it work with other PWM pins. I am changing to the corresponding timer and
mux, but I get only garbage.

If I see correctly, if I want to relocate it to pins A8 A9 from 3&4, i need to relocate the FTM to another FTM and change:
CORE_PIN3_CONFIG = PORT_PCR_MUX(3) | PORT_PCR_DSE | PORT_PCR_SRE;
...

Ok, can you provide a little snippet on how to write to multiple PWM outputs with DMA?
I will take care of writing the code for the Object then.

I am trying to make a multi-output (let's say 6 outputs) object for the Audio Library to allow output
of PWM control signals for analog components like Filters etc. (with filtering the PWM of...

Try "hovering" over your launcher bar in the bottom corner while it tries to connect.
I have the same issue and hovering multiple times over the bar helps. Probably some RPC issue.

If you will have some time, you might want to look into http://nmedit.sourceforge.net/ :)

Paul, is it planned or possible to Re-Connect and Re-Route the AudioConnections? This would be a great advantage for experimentation.

Hi Tectu,

Can you give me some example so I can dig a bit deeper into it?

I stumbled upon this post while looking for an RTOS for the Teensy:
http://forum.pjrc.com/threads/26377-ChibiOS-RT-2-6-5-RTOS-for-Teensy

As there is great progress going on for the ILI9341 TFT...

Did you select USB Midi as Mode from:
Tools -> USB Type -> MIDI?

Is it possible to program multiple Teensies, where every single is connected to a USB hub, with the same hex file
or different hex files from the console, or would I need to modify the stand-alone...

16 Teensies as slaves. Its on a 19" chassis backplane (solid pcb). Total length is around 30-35cm.

Hello,

For my project I have a long bus of I2C Slaves (Teensies) attached to a Teensy 3.1 as I2C-Master. What is the maximum speed for the Teensy I2C and how
is it changeable? As far as I...

OP: Please delete. It seems like Serial Communication breaks (USB Serial) instead of I2C.

Paul, I am happy to see that you liked my idea and made it into something, what I also wanted to achieve!

Is the 2nd SPI Interface also accessible with the Teensy SPI Library when using the 1st
SPI Interface?

Also: Is it possible to use the UART in SPI Mode (asynchronous mode) as in the atmega168/328...

@Paul: By the way - the SD Card of the Audio Board uses Pin7 (MOSI), Pin10 (CS), Pin12(MISO), Pin14(Clk).
Whats the best way of making the SD-Card work together with the ILI9341? As the ILI9341 uses...

But this will need modification of the MINI54TAN firmware?
Update: Apparently not..

Thank you! The new version is no longer based on rare components and sounds also good! I'll keep
you updated

Hi,

As some of you might know, I am working on a hybrid analog / digital synthesizer. Unfortunately there
are a few little bugs which make the Synth crash somewhere (it hangs) and serial...

Paraphonic and Multitrack.

Click here for a sonic demo (with a lot of soft & super hard sounds)
http://tech.datanoise.net/files/diysynth/diysynth_demo.ogg
All unprocessed. All directly from the...

Here is a current pure demo: http://tech.datanoise.net/files/diysynth/final_demo_delay_newvcf.ogg

I am using standard ALPS Potentiometers (between 1K and 10K values) linear for around $.50€ per piece.

Hi,

I have a few spares of the MK20DX256 and wondering if there is an alternative teensy-compatible
boot loader which uses for example an tiny avr / at90usb to upload code to the MK20DX256?

Here is by the way a part of the control surface. It has 40 potentiometers
and uses only 8 teensy pins for that!

2496

Yes, I totally agree. Although I would suggest implementing Grayscale Fonts (instead of just pixel on / off binary notation).
I just optimized my font generator to squeeze the font down to 11x15...

By the way: We can probably use this algorithm for smooth anti-aliased fonts
http://en.wikipedia.org/wiki/Xiaolin_Wu's_line_algorithm

You might also want to look into...

I think I will have to take over this part. Let me see if I can find a little time and brain power (currently I have still a bit
of a brianlag because of work + work on my synth).

By the way: Do...

Actually there is a daily efficient compression algorithm for micro controllers for
exactly this purpose. Its called "Heatshrink" - no joke.
But I must say that I find your idea with the rectangle...

Done it:

https://github.com/DatanoiseTV/BitmapFnts/blob/master/chartable.h
20x32 Font.

is my python converter code. you can access the pixel data by image.getpixel((x,y)).
I think you should be able to use this data in a good way :)

I made a "TrueType" font to Bitmap converter in Python. Are you planing to support Bitmap/Sprite-Fonts?
https://cdn.mediacru.sh/UkOMOUzWNh6N.png (example for fixed width 20x32 font)

Each Letter...

Hi Paul,
I just got an ILI9341 Display (2.2" without Touch Interface) pretty cheap and I will be able
now to help you with debugging etc.

Hey, quick update! My self made SSM2044 boards that arrive today have just been soldered and fired up!
All works! No PWM noise at all! All perfect! You cannot imagine how fat this thing sounds now....

Thank you! That are the old demos. There has been done a lot of improvement since I recorded those samples.
It sounds much much much better now. Today my new filter boards arrived. I think I will...

Adding -DTEENSYDUINO to my build flags on my build system fixed the problem. Works all fine now!
At least it compiled. I can tell you if my hardware still works later.

Ah, thats the issue. Where do I find the Release Candidate?

-- Nevermind.. Found it..

Just for the record: which Teensyduino version should I use for this? I should just place the Libraries in the Library folder instead of replacing them, right?

I have just replaced the SPI library by your latest version in my project, added ILI9341 driver and
it seems like it broke the SD support (which is the latest from your git)



or is this the...

Wow Paul, this is great news. I just decided a week ago to use this
display for my synth. Is this also compatible with the 2.2" display with ILI9340?
http://www.adafruit.com/products/1480