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    Well, I know it is a niche, but I'd really like...

    Well, I know it is a niche, but I'd really like to get all 16 QUAD timers on 16 pins ...
  2. Thread: uNav INS

    by u_cap
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    Sent you a PM re: dissertation. Did you...

    Sent you a PM re: dissertation. Did you successfully convert it? Thanks!
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    For (my own) future reference, also found this...

    For (my own) future reference, also found this thread w/ @KurtE

    https://forum.pjrc.com/threads/57894-Teensyduino-1-48-Beta-3?p=220131&viewfull=1#post220131
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    Related: the Future 1170 thread is also closed...

    Related: the Future 1170 thread is also closed for the duration "until after Teensy 4.1 ships"

    https://forum.pjrc.com/threads/57842-Future-Teensy-features-amp-pinout?p=233257&viewfull=1#post233257...
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    clarification on Teensy 4.x qtimer

    Thread's closed, but I must be misreading this post:

    "These are all the unconnected pins on Teensy 4.0 which could become available:
    [..]
    B0_06 A8 QTIMER3_TIMER0
    B0_07 A9 ...
  6. What if you want three connections, placing the...

    What if you want three connections, placing the Teensy 3.6 in the middle between a USB device and a USB Host, with a 3rd connection to a PC. Is there enough onboard USB on the 3.6 to address all...
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    Would it be possible to do PulsePosition input...

    Would it be possible to do PulsePosition input capture on eFlexPWM as well?



    You mean the NXP reference manual (non-login version) ?
    ...
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    The card does not list QTM, is Beta2 identical to...

    The card does not list QTM, is Beta2 identical to final T4?



    10 B0_00 2.0 4:CS0 QT1_0 MQS_RIGHT 2:0
    11 B0_02 2.2 ...
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    Maybe I don't know how to read it, but it does...

    Maybe I don't know how to read it, but it does not appear to list/track the FlexTimer Module pins?

    https://www.pjrc.com/teensy/td_libs_PulsePosition.html

    I am trying to figure out what the...
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    Only pinout overview I found calling out Quad...

    Only pinout overview I found calling out Quad Timers:

    https://forum.pjrc.com/attachment.php?attachmentid=15040&d=1540676635

    Implies 9 concurrent inputs.
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    From the various beta threads: *...

    From the various beta threads:

    * https://github.com/PaulStoffregen/FreqCount T4 updates
    * https://github.com/manitou48/teensy4 qtmr_ experiment sketches

    I lost track on pinout...
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    QTIMER (output) tests:...

    QTIMER (output) tests: https://forum.pjrc.com/threads/54711-Teensy-4-0-First-Beta-Test/page151

    output 150MHz at pin 19 ...
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    T4 version of Flex Timer Module called QTIMER ...

    T4 version of Flex Timer Module called QTIMER

    From:
    https://forum.pjrc.com/threads/52761-Teensy-4-0-(hypothetical)-pin-assignments?highlight=QTIMER
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    I'll add what I find (eventually find out) here....

    I'll add what I find (eventually find out) here. One way to phrase my question:

    What's the expected/hoped for spec for Pulse Position (QTimer equivalernt) on Teensy 4?
    How many pins, which, what...
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    Teensy 4 FTM input capature capabilities

    Teensy 4 FlexTimer Module (FTM) / Quad Timer (QTIMER) Input Capture capabilities

    Just in case somebody has already dug out relevant specs:

    I am using Teensy 3.x for FTM input capture, targeting...
  16. OK, maybe I2C to a PIC32 then? Something like ...

    OK, maybe I2C to a PIC32 then? Something like

    https://dorkbotpdx.org/blog/wbowers9000/multi_board_madness

    but with 3.x and more details?
  17. Charge Time Measurement Unit or equivalent for Teensy 3.x?

    Is there an equivalent for the PIC CTMU on the Teensy?

    I am not looking to capacitive touch, but a timer for distance measurement.
    See page 5 figure 5 here:
    ...
  18. Thanks - if you don't expect to to have 24-pin...

    Thanks - if you don't expect to to have 24-pin versions anytime soon, the suggestion to cut 14-pin down to 10-pin is a sensible one.
  19. Double Insulator Pins 0.1 inch 2.54 mm spacing,

    This page

    https://www.pjrc.com/store/header_14x1_d.html

    confuses me. Title says 5 pins, order button legend says 5 pins, image shows 14 pins, which also makes sense.

    These would work for...
  20. PC-connected Teensy(s) for 30+ feet - connection, power, signal ?

    I am trying to find a good solution to connect several - possibly a dozen - Teensy nodes to a PC host.
    The simplest approach would be to just connect them wired, to a USB hub, and run both power and...
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    Thanks Michael, those are really useful links for...

    Thanks Michael, those are really useful links for mock-ups and prototypes - I can ignore extra width for now, or maybe even cut it off once or twice.
    Sort of like this, though cutting might be...
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    The Tindie part is just the chip, so I am looking...

    The Tindie part is just the chip, so I am looking at these in earnest:

    https://www.ebay.com/itm/LSM303C-3-Axis-6DOF-Accelerometer-Magnetometer-Sensor-Module-for-Arduino-H1Z7/273132674862
    ...
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    Thanks - I might not even need feature creep,...

    Thanks - I might not even need feature creep, because the LC might be running all out if I actually use the max of 6 sensors (42mA) it can serve. Each sensor needs at least one FlexTimer Module...
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    There's the LSM303, for which breakout boards...

    There's the LSM303, for which breakout boards exist, but they aren't any cheaper. I was hoping for $5-$10, not $15+.

    Edit: eBay provides. I needed to start looking for eCompass etc., not 6DoF.
    ...
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    Did, but not closely enough. It's 9 DoF. I...

    Did, but not closely enough. It's 9 DoF. I thought it was an IMU, but the gyro is separate.

    So the FXOS8700CQ would be an option
    https://www.pjrc.com/store/fxos8700cq.pdf

    and I already...
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    Simplest accelerometer+magnetometer breakout?

    I want to determine orientation at rest, using an accelerometer with high resolution and small range.
    Need only +/- 1G.
    But I also want to measure the magnetic field vector.

    Do I have to go for...
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    How much current on LC and 3.6 for 3V3 ?

    I want to power 1-8 sensors from the Teensy 3V3.

    The 3.5 and 3.6 "welcome" cards say 250mA for 3V3 max. I don't have a card for the LC - is it the same?

    Is that regardless of how hard the...
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    generic Teensy "perfshield" ?

    Is there a perfboard that has the same width as a Teensy and fits on it?
    Anybody know of e.g. an OSH perfboard-style "shield" made for Teensy I could mod or use as-is?
  29. Teensy project outline, need BOM recommendations/references for modules/shields

    In broad strokes, I am looking to prototype a Teensy-based solution for 48/60 MHz data acquisition from 1-6/8 infrared sensors using FTM, using Teensy LC and/or Teensy 3.6.

    Something using a...
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    I think I found the solution - it occured to me...

    I think I found the solution - it occured to me that the FTM calls are currently made in this order:



    *portConfigRegister(pin) = PORT_PCR_MUX(4);
    CSC_CHANGE(ftm, cscEdge);


    If ALT4 does...
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    I can post source of the exact sequence of Teensy...

    I can post source of the exact sequence of Teensy API calls for GPIO and InputCapture, but w/o the hardware it's not much of a repro.

    I can phrase my question like this: what I observe is that:
    ...
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    I also tried INPUT_PULLUP at the end of the final...

    I also tried INPUT_PULLUP at the end of the final GPIO read verifying the state transition, same issue.

    If I read this right, the internal pullups ensure that disconnected pins are guaranteed...
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    Somebody kindly suggested I should consider the...

    Somebody kindly suggested I should consider the built-in pull-up resistor to ensure that my E pin, configured as input, does not get drawn to LOW - assuming that's what happens when setting ALT4.
    ...
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    Thanks a bunch for the references, Paul. I think...

    Thanks a bunch for the references, Paul. I think I understand the InputCapture setup, but I am not sure this covers the problem I am observing.

    First, I have to generate a bunch of once-off pulse...
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    Preamble: I understand this will take a while...

    Preamble:

    I understand this will take a while for me to sort out.

    At this point the guidance I could really use is somebody who understands the Teensy/FTM hardware constraints to tell me "this...
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    I had hoped to use PPM as-is, and I am not...

    I had hoped to use PPM as-is, and I am not through doing due diligence on it, but I started a thread here:
    https://forum.pjrc.com/threads/51727-Question-about-PulsePosition-for-same-pin-I-O

    I...
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    This: //#define I2C_F_DIV28 ((uint8_t)0x08)...

    This:

    //#define I2C_F_DIV28 ((uint8_t)0x08)
    ...
    //#define I2C_F_DIV1536 ((uint8_t)0x39)
    https://github.com/PaulStoffregen/cores/blob/master/teensy3/kinetis.h

    The usual caveats - as in...
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    I would much appreciate a clarification on this -...

    I would much appreciate a clarification on this - is 48MHz the best this can do (including more recent e.g. Teensy 3.6)? Is it possible to run at 96MHz and sample PP at 48MHz?

    How did you get this...
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    Question about PulsePosition for same pin I/O

    Sanity check needed regarding a possible PulsePosition modification.

    I am trying to capture data at 48MHz, similar to what was done here:

    https://trmm.net/Lighthouse...
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