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Thread: Web site could use a few updates :)

  1. #151
    Senior Member+ KurtE's Avatar
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    @Paul - as mentioned in a different thread: https://forum.pjrc.com/threads/49358...l=1#post278928

    Actually for all of the Serial ports for a CTS pin you can use any pin that is an XBAR pin
    The attachCts method knows about this and sets up the XBar plus the Hardware Serial.
    This is also true for RX pin for serial ports. However on any Serial port you can only use an XBar for either CTS or RX but not both...
    Yeah, I think I knew that, but I didn't recall it. It looks like pins 0-5, 7-8, and 30-33 are the Xbar pins. It would be helpful if the Serial library page mentioned this.
    Which pins that have XBar capabilities is different for T4, T4.1 and soon (I think) MMOD Teensy...

    T4 I believe is: Top: 0-5, 7,8 Bottom: 30-33 SDIO: 34-39
    T4.1 Top: 0-5, 7, 8, 30-33, 36, 37 SDIO: 42-47
    I think MMOD is same as T4 here.

  2. #152
    Senior Member+ defragster's Avatar
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    On this page: pjrc.com/store/ic_mkl02_t4.html

    A link to this startup post info : pjrc.com/threads/64468-Teensy40-only-3-3V-power-supply

    Might help like it did here : Teensy-4-1-I2C-Start-up-Issue

  3. #153
    Senior Member+ defragster's Avatar
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    On pjrc.com/teensy/loader.html it hasn't been updated for T_4.x:
    Step #2: The Teensy Loader Application
    The Teensy Loader program communicates with your Teensy board when the HalfKay bootloader is running, so you can download new programs and run them.
    Update: Teensy LC & 3.x are supported by Teensyduino.
    Similar but only up to 3.0 on: pjrc.com/teensy/loader_mac.html
    Using The Teensy Loader on Mac OS X
    Update: Teensy 3.0 is supported by Teensyduino.
    ...
    updated for Teensy 3.0. Please install Teensyduino to use Teensy 3.0.
    This page hasn't been updated past Teensy 2.0: pjrc.com/teensy/teensyduino.html
    ...
    How Does Teensy 2.0 Compare With Arduino?
    On May 19, 2012, Arduino Leonardo was released, using the same ATMEGA32U4 chip as Teensy 2.0. Currently no Arduino board offers hardware similar to Teensy++ 2.0.

  4. #154
    Senior Member+ defragster's Avatar
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    Paul - is there a new supported Flash yet supported on T_4.x bootloader chip - courtesy of Teensy MMOD? for this page :: pjrc.com/store/ic_mkl02_t4.html

  5. #155
    Senior Member PaulStoffregen's Avatar
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    Quote Originally Posted by defragster View Post
    is there a new supported Flash yet supported on T_4.x bootloader chip
    Officially, no, not yet. Only the 2 flash chips from Teensy 4.0 & Teensy 4.1 are supported.

    Unofficially, the larger chip from MicroMod might work on a DIY board, but hasn't been tested. I only soldered the programmed chips to Teensy 4.0 and 4.1 boards. I didn't (and still don't) have any virgin MM boards. PJRC will not officially say another flash chip works until I have personally tested it.

    As you know, I've been pouring a lot of work lately into support for encrypted flash. The encryption and many supporting parts are working, but I'm currently stalled on erasing in locked mode. When all the encryption stuff is done, I will update and fully test all 4 chips (T4.0, T4.1, MM, DIY PCB). I'm also going to fix the bug where no USB connection in bootloader mode fails to slowly blink the red LED. I'm still considering a long-requested feature to have a bootloader timeout, where it reboots the board to run your program if no PC communication has occurred for some length of time.

  6. #156
    Senior Member+ defragster's Avatar
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    Very good - was on my list to ask after this post last month:
    Quote Originally Posted by PaulStoffregen View Post
    Teensy 4.x only supports 3 specific Winbond flash chips: W25Q16JV*IM, W25Q64JV*IM, W25Q128JV*IM. Even the similar Winbond parts which end in "IQ" are not supported and known to not work.
    ...
    With a lot of bootloader work in progress between MMod and encryption makes sense to see it all fully tested.

    The last encryption post was eye opening - extending unlocked with encryption to standard Teensy as well as the locked fuse set option ... Rocky Ground to cover ... good luck.

    And a way to restart after accidental Button press sounds welcome without having to repower or other way to restart. Sometimes the Button is hit on purpose to stop execution, so would the restart take another 'Button Sequence' like two long presses or something?

    Good you got larger code space with new bootloader MCU's - hopefully it isn't getting cramped in there.

  7. #157
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    I recently ran into a problem where I was trying to change the default ADC reference on a Teensy-LC with the function "setReference(REF_EXT)" and kept getting the error " 'setReference' was not declared in this scope" even when I included <ADC.h>. It turns out "analogReference(EXTERNAL)" works even though all of the documentation here says otherwise.

  8. #158
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    @RJF:

    As recommended to you in the other thread, your report needs a *specific* reference (URL, link, etc.) to where you see the incorrect information. Just trying to use " . . . even though all of the documentation here . . . " does not give any clues on where to look to find the incorrect info.

    Thanks,

    Mark J Culross
    KD5RXT

  9. #159
    Senior Member+ KurtE's Avatar
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    Maybe mentioned elsewhere...
    On the page: https://www.pjrc.com/store/display_ili9341_touch.html
    There are now two part numbers. For the 2.8 and for I believe a newer 3.2" one.

    You might want to mention, the 3.2 is a newer addition and maybe add in dimension information for new one.

  10. #160
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    In my opinion, the example is poor, encouraging code that results in unnecessary interrupt latency. Better to show an example using std::atomic.

    https://www.pjrc.com/teensy/td_timin...rvalTimer.html
    Last edited by jonr; 07-05-2021 at 12:08 AM.

  11. #161
    Senior Member+ Frank B's Avatar
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    - On a quick google search, Google points to an older version of the Audio GUI in https://www.pjrc.com/tmp/gui/


    https://www.pjrc.com/teensy/td_libs_...sorUsage.html:
    AudioProcessorUsage(); Returns an estimate of the total CPU time used during the most recent audio library update. The number is an integer from 0 to 100, representing an estimate of the percentage of the total CPU time consumed.

    AudioProcessorUsageMax(); Return an estimate of the maximum percentage of CPU time any audio update has ever used. This function is the most useful for assuring the audio processing is operating within acceptable limits. The number is an integer from 0 to 100, representing an estimate of the percentage of the total CPU time consumed.
    The number is a float.

  12. #162
    Senior Member PaulStoffregen's Avatar
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    Quote Originally Posted by Frank B View Post
    Google points to an older version of the Audio GUI
    Wow, that's a very early copy! Deleted.

  13. #163
    Senior Member+ defragster's Avatar
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    This page: pjrc.com/teensy/td_pulse.html

    Has this text that doesn't include T_4.x (T_MM):
    Code:
    Teensy LC & 3.x support the analogWriteFrequency(pin, frequency) function to easily configure the PWM.

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