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  1. I now have both no-CS (generic display) and CS10...

    I now have both no-CS (generic display) and CS10 (Adafruit display) working. But the box around the sclera if the pupil is small or zero is annoying.

    Now to re-solder pin 27 tomorrow.
  2. Off hand, assuming you want to use an analogRead...

    Off hand, assuming you want to use an analogRead to read the piezos for velocity, and assuming you do not have advanced soldering skills, I would say either the Teensy 3.5 or 3.6.

    Both the 3.5 and...
  3. No problem. Have fun with the dogs...

    No problem. Have fun with the dogs...
  4. I do have Adafruit 240x240 displays with a CS...

    I do have Adafruit 240x240 displays with a CS pin, I can try that tonight after work. Thanks.
  5. Well it compiles, but it doesn't run. I was...

    Well it compiles, but it doesn't run. I was testing with a single eye, as I need to re-solder pin 27 once again (sigh). I used one of the cheap no CS displays. I've run the graphics test with the...
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    I would tend to prefer the bottom pins extending...

    I would tend to prefer the bottom pins extending before and after the main pins (the USB and SD card should go before, and the 10 pins at the back + reset + on/off). That way you can easily use it...
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    I don't know. Human reaction time is so much...

    I don't know. Human reaction time is so much slower than microprocessor time, but i2c speeds are somewhat slow. With the i2c digital boards, there is one or two extra wires that can be used as an...
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    There are lots of options. One option is to use...

    There are lots of options. One option is to use the I2C or SPI buses to provide digital input/outputs or analog inputs. On I2C, you can connect multiple devices, each with a different address. On...
  9. Thanks. I replied to the post, but I forgot to...

    Thanks. I replied to the post, but I forgot to download the file, and when I looked on my system, I had only the earlier 128x128 versions.


    Thanks.
  10. I recall people looked at the new version of...

    I recall people looked at the new version of uncanny eyes for the Monster M4SK (that supports the 240x240 displays). Do we have a Teensy version now that supports 2 eyes? Preferably both 3.5/3.6...
  11. IIRC, the SGTL5000 codec is controlled via I2C...

    IIRC, the SGTL5000 codec is controlled via I2C (pins 18 and 19) and I2S (pins 7, 8, 23, 21, and 20 on the Teensy and 9, 11, 13, 22, and 23 on the Audio adapter). I thought SPI (pins 11-13 + the 6/10...
  12. Note, if you are not using either the SD card...

    Note, if you are not using either the SD card (pin 10 is the CS) nor the flash memory (pin 6 is the CS), the audio board does not use SPI. If that is the case don't connect pin 10 to the audio...
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    With the picture you posted, it uses 5v from an...

    With the picture you posted, it uses 5v from an Arduino UNO type board. The Teensy 4.0/3.x/LC all run at 3.3v. Many displays can run at either 5v or 3.3v, but you need to check what the display...
  14. Well only Paul can answer about the tradeoffs,...

    Well only Paul can answer about the tradeoffs, but others can speculate on the answers (bear in mind, my answers are just idle speculation).

    I would imagine the main issue is cost. Larger boards...
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    Done, 2 Teensy 4.0s, plus the 3x breakout pcb's. ...

    Done, 2 Teensy 4.0s, plus the 3x breakout pcb's. I wonder how many of today's layout are of this board (and adding on Teensy 4.0's).
  16. Somebody with more depth in the sound processing...

    Somebody with more depth in the sound processing area will have to answer most of these questions. I believe (but I certainly do not know) that everything wtihin the Teensy is handled in a digital...
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    Yes, I was about to put in an order for a Teensy...

    Yes, I was about to put in an order for a Teensy 4 + boards (I've sort of wrecked some of the pads underneath one Teensy). Let us know when it is uploaded (or, I can just manually connect the pins...
  18. The Teensy 4.0 does not have an onboard DAC,...

    The Teensy 4.0 does not have an onboard DAC, though if you aren't using a SPI device, you can use the MQSL and MQSR pins (pins 10 and 12).

    Instead of a DAC, it is probably best to use I2S output...
  19. The design tool doesn't worry about pins and...

    The design tool doesn't worry about pins and such. Instead it defines how the sound flows and is processed. I.e. the pins are used when the sound part is created or initialized.
  20. The Teensy 4 does work with the audio breakout...

    The Teensy 4 does work with the audio breakout board assuming you reroute the pins. Paul has said there will be a new version of the Audio Shield that is made to plug into the Teensy 4 shortly.

    I...
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    Yes I know, but I suspect that the T4 is better,...

    Yes I know, but I suspect that the T4 is better, because Paul has a lot more room for doing wear leveling. But I really don't know.
  22. This is one of those areas, were there are many...

    This is one of those areas, were there are many different answers, depending on your needs. I have gone all over the map.

    Here is a recent post where I listed a lot of the different headers,...
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    Thanks for the heads up. Yes, I was probably...

    Thanks for the heads up. Yes, I was probably thinking of Adafruit, which at least in the past usually put in unsoldered male headers for the 3.2.
  24. Yes, in looking at pins 20/21, I see they are...

    Yes, in looking at pins 20/21, I see they are used as alternate pins for SPI1 (pin 0 being the main MOSI1 pin, pin 32 being the main SCK1 pin, and pin 31 being the main CS pin), not SPI0. Given SPI1...
  25. Note, if you want the display to be fast as...

    Note, if you want the display to be fast as possible, you need both CS and DC to be on the SPI fast pins:

    Pin 2 or Pin 10 (you can't use both 2 & 10 for SPI at the same time);
    Pin 6 or Pin 9...
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    Use the EEPROM 'put' function instead of 'write'....

    Use the EEPROM 'put' function instead of 'write'. The 'write' function only writes a single byte, while the 'put' function uses a C++ template and it writes an entire data structure (or scalar...
  27. The Teensy 4 processor does not support touch...

    The Teensy 4 processor does not support touch pins at all, so you can't use the touchRead library. As others have posted, options include using the Capacitive Sensor sensor library or using an...
  28. The main thread where various displays are...

    The main thread where various displays are discussed, including ones you mentioned is at (I tried to jump to a page where they were discussing the 240x240 display (2nd one in your list):

    ...
  29. Gamedunio 1.2.1 now runs on Teensy 4

    I just got mail from James Bowman who created the Gamedunio 2/3/3X smart displays, and the new release (1.2.1) now runs on the Teensy 4.0:

    https://excamera.com/sphinx/gameduino2/code.html
    ...
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    Yep, I figured you would. But I what I meant,...

    Yep, I figured you would. But I what I meant, the Teensy 3.2 without soldered pins provided loose pins in the bag, but later Teensys don't.
  31. I haven't used any of these things, but a google...

    I haven't used any of these things, but a google search yielded:


    https://hackaday.com/2017/02/08/taking-the-leap-off-board-an-introduction-to-i2c-over-long-wires/
    ...
  32. As has been talked about, I'm sure there are...

    As has been talked about, I'm sure there are several solder challenged folk that would prefer a Teensy 4.0 follow on that is in a Teensy 3.5/3.6 form factor and includes the micro SD drive. I'm sure...
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    Well the T4.0 I got from Adafruit did not have...

    Well the T4.0 I got from Adafruit did not have pins. The PJRC version listed in their store no longer mentions providing pins, and I believe the purpose 3.2 I got from OSH park a year or two ago did...
  34. The latest status was posted in my purplse OSH...

    The latest status was posted in my purplse OSH teensy 4.0 thread:

    https://forum.pjrc.com/threads/57544-OSH-park-purple-Teensy-4-0?p=215183&viewfull=1#post215183
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    I haven't ordered from OSH park in over a year. ...

    I haven't ordered from OSH park in over a year. In the past, when I ordered PCBs, the shipping was free. Perhaps when a Teensy is added, or you don't order a PCB, they add the charge. Or perhaps...
  36. Yes, if you don't need audio output via the DAC,...

    Yes, if you don't need audio output via the DAC, you can leave the pins in the back of the prop shield unconnected (the prop shield only uses the DAC pin on the back row if memory serves). Note, the...
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    OSH park purple Teensy 4.0

    I was over at OSH park, and I noticed that the purple Teensy 3.2 (previously 3.1) was no longer for sale. But they now have the Teensy 4.0 for sale:


    ...
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    You can use Wire.h. An i2c bus is a shared...

    You can use Wire.h.

    An i2c bus is a shared bus. Each device has an address, sort of like a phone number. When the i2c master is talking to an i2c slave, it uses the address of the slave to send...
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    It sounds like you might have some accidental...

    It sounds like you might have some accidental solder bridges. Those can be hard to track down, particularly if they are bridges that are temporary depending on the pressure of the board.

    Just to...
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    I recall there was a Teensy based guitar shield...

    I recall there was a Teensy based guitar shield on tindie.com and looked it up:


    https://www.tindie.com/products/Blackaddr/arduino-teensy-guitar-audio-shield/?pt=ac_prod_search


    Even if you...
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    Well the display threads tends to have a lot of...

    Well the display threads tends to have a lot of talk about SPI in general and using both SPI0 and SPI1 to control two separate displays (most notably two of the cheap displays that don't have a CS...
  42. If you need optimized SPI with DMA, such as...

    If you need optimized SPI with DMA, such as running two displays, the posts I see from KurtE, mjs513, and defragster indicate that you should put each display on a separate SPI bus:


    SPI0: SCLK...
  43. On the Audio Shield it expects: Ground pin...

    On the Audio Shield it expects:

    Ground pin on left side
    Pin 6 on the audio shield (SPI Flash memory chip select), Pin 6 on the Teensy 4.0
    Pin 7 on the audio shield (SPI MOSI), Pin 11 on...
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    I believe so, though I have not done it...

    I believe so, though I have not done it personally. I believe the inner pins for USB host are in the same order as a USB adapter within computers.

    ...
  45. Yeah, my soldering iron doesn't have a thin tip. ...

    Yeah, my soldering iron doesn't have a thin tip. But yeah, the main problem I have is my computer/reading bi-focals the difference between the two lenses is about where I would want to use for...
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    As Blackaddr says, there are various ways to do...

    As Blackaddr says, there are various ways to do analog input.

    However, if your inputs are digital you can use the I2S pins. Unfortunately, the Teensy 3.x pinouts did not list the I2S pins. Note,...
  47. In order to optimize the displays on Teensy 3.x...

    In order to optimize the displays on Teensy 3.x systems, you will need to make sure both the CS pin and the D/C use the SPI0 fast pins. From the picture it looks like you are using pin 10 and pin 9...
  48. I was going to ask for suggestions of how to...

    I was going to ask for suggestions of how to better solder those pads. For the 3.2 I like the FrankB castellated board which is fairly easy to solder (and the Bob Larkin board for 3.5/3.6 in the...
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    FWIW, as I posted in another thread, I rendered...

    FWIW, as I posted in another thread, I rendered one of my T4's inoperable when I was trying to attach wires to the underneath pads. I'm pretty sure the problem was I extended pad #31 a little too...
  50. FrankB developed a MP3 library a few years ago,...

    FrankB developed a MP3 library a few years ago, and added a AAC player as well. However, it was developed in the Teensy 3.2 time frame, and only plays one MP3 file at a time.

    I see he made a few...
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