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Type: Posts; User: dave

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  1. Replies
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    Ok sorry, the real intention was to find that...

    Ok sorry,
    the real intention was to find that article you wrote somewhere. Because I need it as a basis to understand what's going up with the porting of software.

    So I think I wrote in the wrong...
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    That's the problem! It compiles without any...

    That's the problem! It compiles without any error.

    So the problem is:

    a declared int in Arduino is 16 bit
    a declared int in ARM is 32 bit wide.

    What happen if I tried to copy and shift...
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    Hi Rob, thanks for your answer!! Paul...

    Hi Rob,
    thanks for your answer!!
    Paul Stoffregen knows very well about that discussion. But I think it was an article posted on internet, somewhere, and Paul did post here in this forum just the...
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    Looking for a discussion about porting from 8 bit to ARM

    Hi guys,
    I m looking everywhere for a discussion opened by Paul (the brain behind Teensy) some years ago.
    In this article/discussion Paul is going to explain that the most code used for Arduino...
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    Hi Steve, ok...thank you very much. I took a...

    Hi Steve,
    ok...thank you very much. I took a look at the whole website and have read lot of thing.
    Very helpful for me was this link and this here. They explain basically how it works and what it...
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    Hello, in my new project I need to transfer...

    Hello,
    in my new project I need to transfer datas from the sensor to the PC. So I need to connect the Xbee adaptor to the Teensy 3.0 and receive them into my PC. Which module should I buy? How can I...
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    Ok, sorry I thought nobody wanted to look into ma...

    Ok, sorry I thought nobody wanted to look into ma huge code to find out the problem. And I wanted to keep "private" my code until it is published under a license.
    Anyway I realize that the problem...
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    How to connect an external Clock source??

    Hi everybody,
    Since I m experiencing problems by drivings servos with my T3 I checked the PWM output from the board with an oscilloscope and understood that the signal is not enough stable to drive...
  9. Thread: I2C Communication

    by dave
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    I take opportunity to continue on this post for a...

    I take opportunity to continue on this post for a short question realted to IMU and I2C bus.
    In the datasheet of an IMU board, I cannot understand this connections:
    1040.
    The board should work...
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    According to my experience for simple debugging...

    According to my experience for simple debugging and programming porpouses doesn t happen anything. But please use at least an USB Hub like this one for example.


    Of course

    I think you need not...
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    How about a simple voltage regulator...

    How about a simple voltage regulator to deliver 3.3V?
    I suppose you want to read datas from a IMU (with 9 or 10 DOF) and since you are not using the USB, you use (I suppose) a battery which supplies...
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    Teensy 3.0: 3.3V pins, maximal Current

    Hi!
    Just a small question.
    According to this diagramm are 3.3 V pins connected toghether.
    But on the small "Datasheet" shipped with my board is one pin* marked with (100 mA max), the other 2 not....
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    Ah! Of course 4,7kOhm resistor and command were...

    Ah! Of course 4,7kOhm resistor and command were during the tests implemented.
  14. Replies
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    Ok I found it out. It is true that the problem...

    Ok
    I found it out.
    It is true that the problem is the Wire.h library but because it tries to interrogate a sensor that is not there (physically) [at least in my experiments].
    I did many tests and...
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    But I m using only Linux!!! Anyway...tomorrow I...

    But I m using only Linux!!!
    Anyway...tomorrow I m going to take a long break and try different configuration (with library, with/without resistors, ...) and I will post your my result.
    Could you...
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    Paul, try to disconnect and connect your board...

    Paul,
    try to disconnect and connect your board before starting the serial monitor!
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    no yes, but I left it commented (it was not...

    no

    yes, but I left it commented (it was not compiled)

    Ok, tomorrow I will try connecting pull up resistors and compiling the library
    Anyway the Teensy works now.
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    Do you mean, that you can compile the sketch on...

    Do you mean, that you can compile the sketch on the PC but not upload?
    I have the same version of Arduino and I found I had trouble with the I2C bus.
    Please take a look here
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    [SOLVED]Teensy 3.0: USB interface dead?

    Ok
    I think I found a bug.
    I just must admit, I was writing a program using the protocol I2C but I didn't connect any sensor to the bus, because it is still on the way (I ordered while writing the...
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    [SOLVED]Teensy 3.0: USB interface dead?

    Hi to everybody.
    Since I cut the USB power from the battery power (as explained in this post) I have a really big issue with my Teensy 3.0.
    It simply doesn t work.
    Putting both power I can see the...
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    Perfekt! Thks

    Perfekt!
    Thks
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    Unable to change my profil (avatar)

    Hi. As stated above I cannot change the picture in my avatar. Clicking on the picture in my page redirect me to the same page, without the possibility to chnage upload an image.
    I use Iceweasel last...
  23. Thanks Paul, I didn t know that link. I thought...

    Thanks Paul, I didn t know that link.
    I thought that reading from an Interrupt routine should not be a problem, since register for writing and reading different are.

    Here my code:



    //...
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    For my understanding, according to this link:...

    For my understanding, according to this link: http://www.pjrc.com/teensy/pinout.html is it possible to feed 5V directly through Vin even if the two pads are not cut.
    Or should one cut the both pads...
  25. Teensy 3.0: which variable-declaration for registers?

    Hi
    Maybe it sound like a noob question but I really need some help to solve this problem.
    Let s say I need to copy in a variable the following Register:

    register_var = GPIOC_PDIR;
    to perform...
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    Hi Nobody can tell me how to convert the timer...

    Hi
    Nobody can tell me how to convert the timer into millseconds?
  27. Thrust me. That because you never needed an...

    Thrust me. That because you never needed an application which must be really RTOS, where time constrains and priorities between different tasks are the most important thing,
    I asked me thosund time...
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    Hi To be honest I had already started with AVR...

    Hi
    To be honest I had already started with AVR similar projects, to read PWM signals from a RX receiver. Since I switched to Teensy 3 (because I need the more powerful processor) I rearranged my old...
  29. Hi Bill I m trying using FreeRTOS (last version)...

    Hi Bill
    I m trying using FreeRTOS (last version) and works very good
    But when I try to use Flex Timer 0 the processor and tasks stuck.
    Is there any compatibility issue? Or should I use another...
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    Thanks digitalmisery! I m really happy to know...

    Thanks digitalmisery!
    I m really happy to know how you wirte that code. That is waht I m looking for.
    One question. In the documentation I cannot find which pins on the board could be used for...
  31. Hi, Again congratulation about the board (Teensy...

    Hi,
    Again congratulation about the board (Teensy 3.0). I use it since 2 days and I confess it is really perfect and very impressive. I will buy more of them in the next.
    Just one question. Since I...
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    Hi Compiling my code cannot recognise the...

    Hi
    Compiling my code cannot recognise the compiler the labels: PIN0, PIN1, PIN2....

    How are mapped those GPIO in Teensy 3.0 ? Which labels are usable?

    Regards
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    Hi I m new here. I receive today my first Teensy...

    Hi
    I m new here. I receive today my first Teensy 3.0, the first time I use an ARM.In the past I had very good experience with Arduino, MicroChip and other 8-bit Microcontrtoller, but for the ARM...
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