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Type: Posts; User: kdharbert

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  1. Teensy 4.1 as HID pass-through for one-handed keyboard?

    I want to be able to type efficiently with one hand. I have a left-handed gaming keyboard with extra buttons accessible to the pinky and thumb that can easily be used as SHIFT\ALT\CTRL modifier keys....
  2. Yes the Teensy needs to do other things while the...

    Yes the Teensy needs to do other things while the SPI is taking place. I was not aware of the approach above using eventresponder. This is really all I think I need. However, can you confirm...
  3. It was a typo mentioning QSPI...I meant PSRAM...

    It was a typo mentioning QSPI...I meant PSRAM chips for memory...QSPI was a different message that day:(

    Regarding memory, I have the external memory stuff working via the EXTMEM command. As you...
  4. Blocking behavior of NativeEthernet on Teensy 4.1?

    I have a use case where I need to receive camera data via SPI and re-transmit it via UDP over ethernet. I'm hitting performance issues and need to use more advanced features to improve throughput...
  5. Need good example showing DMA+SPI imnplementation for large transfers

    I have a Teensy 4.1 application where a known number of SPI reads take place sequentially. I want to ferry the data from the SPI reads to a RAM buffer implemented with the auxiliary PSRAM chips. It...
  6. I messed up library versions and usage. The...

    I messed up library versions and usage. The NativeEthernet library works for DHCP, the LED illuminates and the Teensy returns pings.
  7. Wow thanks! Great news that there may not be...

    Wow thanks! Great news that there may not be anything wrong with the boards.
    I'll take another lap though the libraries and retry.
    Does Teensy make any electrical checks on the port when...
  8. Teensy 4.1 ethernet header and library issues

    I got a T41 breakout PCB made that has an RJ-45 header and needed capacitor configured. I'm having several issues:

    1. Without the Teensy attached, I am observing T+, T-, R+ and R- all shorted...
  9. Four data lines, one SPI port. 1xSKC, 1xMOSI,...

    Four data lines, one SPI port. 1xSKC, 1xMOSI, 1xCS, 4xMISO and 4x slave devices.
  10. UART I\O IS an option. What's available? Both...

    UART I\O IS an option. What's available?
    Both the units you listed require I2C. The ADCL343 clearly shows I2C. The BNO080 requires it to setup the SPI:)

    I had the idea of setting up an interrupt...
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    voltage range: 0-3.3v Speed\res: Low end: 16bit...

    voltage range: 0-3.3v
    Speed\res: Low end: 16bit 44.1khz high end: 16bit 500khz
  12. Need SPI ADC part advice, and 4xSPI questions

    I'm working on a design that requires each communication pin to be either input or output. This means I2C is not an option since SDA is bidirectional. All the accelerometers I've been working with...
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    I'm not sure how many ADCs are on the NXT chip,...

    I'm not sure how many ADCs are on the NXT chip, but if it's more than just the two that the T41 uses, it would be sweet if more were available. Specifically, I'm working on multi-channel optical...
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    3.3V backup regulator advice

    I have a project design that literally uses every single pin on the Teensy 4.1. Literally all of them: bottom side pads, ethernet, USB host and all the exposed pins. I've added external buffers...
  15. Interfacing DMA with SPI to save camera frames to RAM buffer

    I need to process camera frames arriving from an Arducam OV5642 via SPI. If I add both QSPI chips I can get a 16MB buffer which is large enough for to store a RAW format or a JPEG format which can...
  16. Speed isn't the main concern, it's convenient...

    Speed isn't the main concern, it's convenient live uptake. I'm just looking for something I can use to easily to pass live camera data to a PC.

    To get back to the original question: Is there a...
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    Need good part for WPA access + BLE5

    I'm presently using Teensy+NRF24L01. I need to add network access, so I need to change parts. I've ordered some ESP8266 units, but these are a bit old. I know there are ESP32 parts, but those are...
  18. Best way to use native ethernet to transfer files from SD card and stream video

    I have an Arducam and I want it to constantly take pictures, save them to the SD card and have a PC connected to the Teensy ethernet port poll a file server for new pictures as they are saved. I...
  19. List of notable projects with Teensy as USB host?

    What devices have people been able to interface with Teensy via the USB host port? I'm having a board made and I can have it expose the USB host pins without much trouble. This theoretically lets...
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    Thanks! I've also been hamstrung by trying to...

    Thanks! I've also been hamstrung by trying to match available parts on JLCPCB and what I can get schematic and footprints for on SnapEDA. I lucked out on HR911105A above. Double thanks!
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    Thanks. I guess, I'm fuzzy on what a MagJack...

    Thanks. I guess, I'm fuzzy on what a MagJack is\does as opposed to other ports. I have a footprint and schematic part for that MagJack part...JLCPCB doesn't stock it though darn:) Thanks for the...
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    Thanks. I wanted documentation rather than risk...

    Thanks. I wanted documentation rather than risk messing it up when I eyeball it.
    I'm still not sure how to configure the rest of the pins...and can't confirm if the footprint of the jack is the...
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    Need RJ-45 pinout help

    I'm a fairly new at PCB design and I'm building a board for a Teensy 4.1 and am going to add an RJ-45 port on board. I'm looking to use the below part. I need to match the Teensy pins to the...
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    Noisy buttons with Teensy 3.6

    I've only used buttons with Teensy 4.1 so far. I'm using a button with a Teensy 3.6 and behavior is strange. I'm running the simple push-button-play-wave-from-SD-Card sketch that is in the audio...
  25. I need the constant clock signal present to...

    I need the constant clock signal present to verify signal quality while also utilizing normal SPI, so simply using the PWM features doesn't work. I'm turning the corner regarding the below post for...
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    Sorry if this is uneducated (or already possible)...

    Sorry if this is uneducated (or already possible) but could the Teesny hardware SPI be configured to clock in\out multiple data lines at a time? Teensy 4.x is good about exposing entire ports...does...
  27. I forgot to say that yes, there is likely to be...

    I forgot to say that yes, there is likely to be only one device.
    I don't know what SPI_MST is. I thought 'Teensy as SPI Slave' was not supported.
  28. Can I2C\SPI be used with a constant clock signal?

    I believe hardware I2C and SPI only activate the CLK train when a call is made. Two questions:
    1. Does it adversely effect the SPI\I2C protocol if the CLK pulse never stops?
    2. Can the Teensy SPI...
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    If there's any way to integrate an FPGA that...

    If there's any way to integrate an FPGA that would be neat. Other Arduino units like the MKR Vidor 4000 do this.
    Another cool thing about the Vidor 4000 is it has a PCI-E edge connector, so you...
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    I2C\SPI over free space optical link?

    I need to collect data from a remote sensor. I need to cut costs on sensors, so I'm looking for ways to remove the Teensy units from my remote sensors. I believe I can implement a three or four...
  31. Need easy way to get many low current outputs

    I have an application where I need to run many (20+) 3.3v outputs that have low current requirements...specifically 20ma LEDs and 3.3v micro stepper motors. Due to the low current requirements,...
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    Current capacity of GND pins

    I'm making a nano-drone PCB and I need to keep the design tight. As such, its easier if I make good use of all three ground pins on the Teensy4.0. How much current can they sink safely?
  33. Rapid changes in I2C pins to support multiple units?

    I need to build a prototype that integrates multiple USFSMAX units. I'm working through several issues. One of which is that it it operates over I2C but does not support an address change jumper, so...
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    @Kurte Thanks as always. I see now that the T41...

    @Kurte
    Thanks as always. I see now that the T41 pinout card is not the same as the website;) I2C1 pins in the SD slot is very good news! ...as is the info on the extra pads!

    I need more...
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    I'm catching up on this thread. I'm not sure if...

    I'm catching up on this thread. I'm not sure if the below items have been covered before, but here's what I have:

    1. What are the limitations on to the number of hardware I\O channels that can...
  36. I need a Teensy-based quadcopter. Looking for active projects

    I need to find a drone project with a Teensy4.x-based flight controller. I need something as ready-to-go as possible. What projects are active?

    My goal is close-in drone automation, so I'm...
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    Best practices upgrading from i2c_t3

    I want to use the this product with a Teensy4.x:
    https://www.tindie.com/products/onehorse/usfsmax-module-and-carrier/

    The library is built for Teensy3.x and I need to upgrade it. It seems pretty...
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    Good Philips Hue library for Teensy?

    I need to upgrade a project using Teensy 4.1 to support Hue lighting. It seems many people have done this with other Arduino. I'm looking for pointers on good libraries and projects that use Teensy...
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    5.8ghz units that are not FPV

    I'm investigating replacing my nRF24L01 link with a 5.8ghz unit so that I can use circular polarized antennas. All the units I can find are for audio\video. Are there units that work similarly to the...
  40. ...source folder...

    Attached..
    23781
  41. No luck so far. Here are my steps: 1. Added this...

    No luck so far. Here are my steps:
    1. Added this line to RF24.h:
    SPIClass *_pspi= &SPI;

    2. Global replace in RF24.cpp:
    _SPI. to _pspi->

    3. Changed constructor in RF24.cpp:...
  42. NRF24 addressing using Teensy branch of Radiohead library

    I am switching from using the RF24 library to using the nRF24 portion of the Radiohead library that Paul configured for Teensy. I did this in order to be able to use SPI1 and SPI2. However, in this...
  43. That does help. Thanks!

    That does help. Thanks!
  44. Best practices for adjusting libraries for non-default SPI channels

    I need to adjust a set of libraries that use default SPI such that I can specify SPI1 or SPI2. I've seen a thread relating to best practices for this doing this but I can't find it now. Is there a...
  45. Thanks! Yes. This is a Teensy-as-programmer use...

    Thanks!
    Yes. This is a Teensy-as-programmer use case.
    Thanks for the info regarding manufacturer, I had thus far neglected that.

    Another candidate was the BNO085. A quick check didn't reveal...
  46. Using Teensy to program Cortex M0-based periferal units?

    I'm researching programming an IMU board that is run by an ARM Cortex M0. I'm trying to search for examples of a Teensy being used as the programming unit, but the results all get hijacked to other...
  47. Need help with bluetooth datapath to MATLAB

    I need to get data from a Teensy 4.1 into MATLAB on a Windows PC via wireless. I have this ironed out on a wired connection, but our prototype requires a wireless connection to PC such that the OS...
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    ...looks like I goofed a reply. Resend... The...

    ...looks like I goofed a reply. Resend...
    The speed test shows between 420000 and 450000 using a Windows 10 desktop. The math indicates I have enough headroom for the use case if MATLAB cooperates....
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    Perhaps that's good news. I'm operating off the...

    Perhaps that's good news. I'm operating off the understanding that the USB serial connection to the PC maxes at 115200. So that's just the serial monitor's speed?
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    I need less than 1Mbit. If I use ethernet, I'll...

    I need less than 1Mbit.
    If I use ethernet, I'll need some way to get the data through the OS to MATLAB. That has a number of other moving parts that I'd need to figure out. I'm not sure if anyone...
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