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    T4 interupt priorities

    I read the t4 can use all its pins as interrupts,

    Great , as it means I can select post building which 4 pins to use.

    I assume the interrupts have a priority ?

    I use...
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    programming the fader position

    On desks I see, when you touch the fader, the motor stops driving,

    does this do that ?
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    I have memory, bad as it is, that the actual...

    I have memory, bad as it is, that the actual clock of the arm can be moved using a setting in the chip,
    not a lot, but sufficient to account for differences in the resonators, for just this...
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    I2C libs, selecting multiple

    I have a procedure, that uses the I2C on the teensey 3.6

    I use all four of the available I2C's on the board,

    At the moment, I have three procedures,
    one for each of the I2C, which are...
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    thank you MM

    thank you MM
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    thanks yep got the unit_8 thing , still...

    thanks

    yep got the unit_8 thing ,
    still amazes me that the system does not chuck that sort of thing out as an error,
    I come from the world of ADA etc, where that sort of stupid...
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    For info, found my code / board bug, But...

    For info, found my code / board bug,

    But would still like to know about volatile , and why we don't need it in arduino world.
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    Volatile. A little knowledge is dangerous

    Have some code on teensy 3.2, duino 1.81

    From what I am seeing with a scope
    the first time I call this it works,
    the second time, it seems to be totally ignoring the pin,

    probably...
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    agree thats what I'm going to use, despite the...

    agree

    thats what I'm going to use, despite the fact the web page says use a newer / faster on ,
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    Thank you They both seem to work just fine on...

    Thank you

    They both seem to work just fine on the 3.2 teensy

    Was just porting to 3.6, and noticed the age, wondered what to use .

    Ill go with the one built into teensyduino...
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    Which SPI library to use ?

    On this page

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

    It says there is a faster SPI library for the teensy 3.0

    the link on the git hub is 2015.

    should one use the git library or the...
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    Thank you thats great information. I won't...

    Thank you

    thats great information.

    I won't make that mistake again,,,,

    Have good weekend
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    reading MISO

    Have a ADC AD7193 chip, which is SPI , ish.

    In particular the adc , uses its MISO pin , to indicate its ready.

    in effect one does the spi transfer,
    and then waits, with chip select still...
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    KurtE , many thanks thats just what I'm...

    KurtE ,

    many thanks

    thats just what I'm after


    have a good one
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    bit banding

    anyone got any hands on stuff on bit banding

    http://infocenter.arm.com/help/index.jsp?topic=/com.arm.doc.dai0179b/CHDJHIDF.html
  16. Thank you guys So global replace about to...

    Thank you guys

    So global replace about to happen digitalWrite => digitalWriteFast
  17. digitalwritefast v digital write on teensy 3.2 , 3.6

    Looking at updating / tidying up some code I have.

    Only use the teensy 3.2 or 3.6 now days.

    whats the advantage of using the digitalWrite against gigitalWriteFast ?

    Looks to me as if I...
  18. UPS states side seem to have dumped the packages...

    UPS states side seem to have dumped the packages onto US postal service,
    who snail mailed them the the UK, and dumped them into the UK postal system,

    UK postal system seems to have then...
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    Thanks KurtE Thats what I was hoping, ...

    Thanks KurtE

    Thats what I was hoping,
    could not work out easily which was the new style or the old style !

    usb_configured seemed 'tighter' to me , but !Serial as you say is the way forward....
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    Why ? its a bit of code, I say its a cut down...

    Why ?

    its a bit of code, I say its a cut down of , and I'm wondering what the procedure does,
    why does its provenience matter to you ?
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    Its some one elses code I got handed, I was the...

    Its some one elses code I got handed, I was the last one to duck !
    This is just a demo of the code, the real thing is hundreds of lines long.

    I had not heard of usb_configured, but on search of...
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    usb_configured on teensy 3.2

    I'm having problems with usb_configured on a new teensy 3.2 project.


    Have boiled it down to a simple test code,
    the usb_serial_avaialble() does not cause an error , but the usb_configured...
  23. Mine arrived in the UK last week whilst I was...

    Mine arrived in the UK last week whilst I was away.

    Paid import duties, but then had to pay the same again for the postal service to handle the import duties as UPS do not cover that.
    Added...
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    When do I start worrying that mine has not...

    When do I start worrying that mine has not arrived to the UK ?

    Received UPS saying it was on way , then nothing.
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    Fantastic, and great news. Breath is held ....

    Fantastic, and great news.

    Breath is held ....
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    SUB speed on the K66 variant

    USB on the K66,

    I see the data sheet says K66 can do High Speed ( 480 Mb/s ) USB 2.
    which I think is the first Arduino that can, certainly the first Teensey,

    Is the Teensey K66 going to be...
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    STM32 F7 , 5v tol IO M7 Arm

    Don't suppose anyone is looking at the STM 32 F7 range

    http://www.st.com/content/st_com/en/products/microcontrollers/stm32-32-bit-arm-cortex-mcus/stm32f7-series/stm32f7x9/stm32f779ni.html

    Arm...
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    I'll put this to bed a little. Well had a fun...

    I'll put this to bed a little.

    Well had a fun time with this, got the clients bits working, debugged intermittent broken cables , dry joints on pull up resistor, et all... but client now happy....
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    to give you a quick heads up you include the...

    to give you a quick heads up

    you include the T3mac library ,

    you call read_mac

    read_mac returns a variable called mac , which is an array of 6 bytes ( 0 to 5 ) of the mac address,

    the...
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    OK. step back a bit. this might help. not...

    OK.

    step back a bit.

    this might help. not certain where / when I got it but it works as an example

    #include "T3Mac.h"


    void setup()
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    As per this thread ...

    As per this thread

    https://forum.pjrc.com/threads/91-teensy-3-MAC-address


    the variable mac in this thread has the mac address from each teensy
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    Thanks Headroom, I'd missed that app note, but...

    Thanks Headroom,

    I'd missed that app note, but its now on my usb stick of "good stuff" , just in case.

    All good points about the cable length, pull ups, etc, were looking into all those, and...
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    Thanks Headroom, yes an I2C buffer is one of...

    Thanks Headroom,

    yes an I2C buffer is one of the routes we've looked at,

    its just that the signal does not look too bad, certainly within I2C specification for rise time ( just ) and I have...
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    Thanks Paul thats what I thought, I have run...

    Thanks Paul

    thats what I thought, I have run the teensy over long cable I2C before, just this client has to wire using VERY thin cable,
    which is high capacitance,

    It could be 1001 things,...
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    Thank, Oh yes I know about the I2C hardware,...

    Thank,
    Oh yes I know about the I2C hardware, I'm an ASIC engineer by background,

    Just because something is hard , does not mean it can't be programmed ....
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    Teensy 3.2 , and I2C

    I'm fishing here ....

    Have a few teensys here, running,
    using them to interface to I2C chips / things.

    So I know about capacitance, rise / fall times, signal integrity, I2C speed,

    But...
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    Paul can you post link to the doc on the new...

    Paul
    can you post link to the doc on the new pins please,
    in particular, how to specify which pins are rts and cts
    thanks
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    thanks Paul did see that, and inquired, ...

    thanks Paul

    did see that, and inquired,

    but that would put the s/w side of the companies nose out, "if hardware can build a new board, we can do better sw than THIS "..


    not worth the...
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    thank you macaba its up to the clients if they...

    thank you macaba

    its up to the clients if they go for it or not,
    but I can but recommend it as it saves them the layout time,
    but you know that 'not invented here thing !! ' is what...
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    Fantastic Thats the one HWguy I was...

    Fantastic

    Thats the one HWguy

    I was beginning to think I was hallucinating ...
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    thanks Paul Seen them on your site, ...

    thanks Paul

    Seen them on your site,
    great things, but not for this customer,
    If I remember the box mount connector above is wider than the Teensy 3.2, which only just fits in...
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    Thanks those are for micro and mini B...

    Thanks

    those are for micro and mini B connectors, or the A connector

    What I have seen here and lost, is the big B connector

    a board that these are on
    ...
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    Teensy 3.2 , USB B connector

    want to put some Teensys into a small box,

    but must have a USB B connector , not a mini , or micro but that big strong square thing.

    The standard adapter cable is WAY too big.

    I have seen...
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    Welcome back Paul I'm tied up trying to get...

    Welcome back Paul
    I'm tied up trying to get HID to work, but should find time next week to test CTS / RTS
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    and I apologize, i missed #308. well found.

    and I apologize, i missed #308.

    well found.
  46. try 1.6.5 Arduino, seems much more stable ,

    try 1.6.5 Arduino,
    seems much more stable ,
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    rfresh737, You need to get your voltage levels...

    rfresh737,

    You need to get your voltage levels correct.
    Quick background. Most logic used to be 5v , its now mainly 3v3 , and its dropping to 1v8.
    you can 'sometimes' plug 5v into 3v3...
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    Re the beta tried spi and eeprom , 1.65...

    Re the beta

    tried spi and eeprom , 1.65 Arduino.
    all good,

    Re Arduino 1.66, nothing but problems , and thats not the beta , its Arduino. I've droiped to 1.65 which seems good and...
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    did not know about ctrl G , thanks will try...

    did not know about ctrl G ,
    thanks will try to remember that,
    to many decades using F3,
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    Could be your scope calibration, but the...

    Could be your scope calibration,

    but the blue scl line never reaches zero.
    looks like it only makes about 0.3 volts.

    if thats the case, something is seriously wrong with the wiring...
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