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Type: Posts; User: bigpilot

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    Would be nice to have a C download with a sample...

    Would be nice to have a C download with a sample makefile to get people started. Also, some code samples on how to manipulate ports, timers and UART / SPI would be nice.

    I'm planning to make an...
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    Hilarious movie and great piece of work!

    Hilarious movie and great piece of work!
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    What CAE program did you use for the PCB design?

    What CAE program did you use for the PCB design?
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    I'm a great fan of RISC-V but I agree with...

    I'm a great fan of RISC-V but I agree with previous posters that if the design isn't fully open-source there's little benefit. OTOH commercial companies may benefit from a closed design which enables...
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    Using thermal noise from a diode shouldn't be too...

    Using thermal noise from a diode shouldn't be too difficult and I don't believe an adversary would be able to manipulate it through external interference. I saw that the Teensy 3.2 uses dual ring...
  6. Yes, but the IV is not sensitive info, it can be...

    Yes, but the IV is not sensitive info, it can be transmitted in the clear. Point is never to use it more than once.
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    Teensy Loader icon

    Small suggestion: add a program icon to Teensy Loader. I find it a little annoying that when I use alt-tab to switch between processes it only shows a generic system icon. Also it makes visually ...
  8. Thanks, that worked.

    Thanks, that worked.
  9. Is there a way to prevent this?

    Is there a way to prevent this?
  10. I'm using a Teensy 2.0 (Atmel AVR Mega32U4). ...

    I'm using a Teensy 2.0 (Atmel AVR Mega32U4).

    My .eep file looks like this:


    :080000000000000000000000F8
    :00000001FF


    In code I have this:
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    A hardware RNG (based on a noise diode) would be...

    A hardware RNG (based on a noise diode) would be my first priority, and maybe a hardware AES-256 implementation. In addition, a hardware RSA-2048 implementation would be a real boon. Let's face it,...
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    I've implemented XTEA-128-CBC and use an...

    I've implemented XTEA-128-CBC and use an incremental IV and a static key. I use it for transmission between to Teensy controllers via an APC220 wireless serial modem.
  13. How do I prevent EEPROM from being overwritten bij Teensy Loader?

    Is there a way to prevent the Teensy Loader from overwriting EEPROM memory when burning in a new program?

    I'm storing an IV (initialization vector) in EEPROM and when I burn in a new program the...
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    A bootloader is started when the microcontroller...

    A bootloader is started when the microcontroller starts. It contains a small program to which you can connect (through a serial connection over USB in the case of Teensy) and which contains code to...
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    It has started working again, for some...

    It has started working again, for some unfathomable reason. The cable's is good, I've used it for years.

    I do have a Linux PC, but I never use it for Teensy development. I'll give it a try.
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    USB Device Not Recognized

    I sometimes have the problem that Windows does not recognize my Teensy and I therefore am unable to see the debug output from HID Listen.

    I ussually reboot my computer and that often works, but...
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    Threading isn't the problem, it's...

    Threading isn't the problem, it's synchronization. I mean in terms of programming complexity.

    If one only has a single background task, it might be easier to use a timer callback and a volatile...
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    Have you tried setting the start and stop bits...

    Have you tried setting the start and stop bits and parity?

    Below is some of my code I once wrote:


    m_SerialPort = new SerialPort(strSerialPort, BAUD_RATE, Parity.Even, 8, StopBits.One);
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    But the firmware (bootloader) isn't, AFAIK.

    But the firmware (bootloader) isn't, AFAIK.
  20. Replies
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    Automotive grade Teensy

    I was wondering if an Automotive Grade Teensy will ever be released for more demanding environments.

    We are thinking about using a Teensy for a small satellite and we need a greater temperature...
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    A Teensy t-shirt should have some humor, not just...

    A Teensy t-shirt should have some humor, not just be a dry advertisement or logo. Anyone have a suggestion?
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    I also pledged $50 for a 3.5 / 3.6 combo....

    I also pledged $50 for a 3.5 / 3.6 combo. However, it would have been so much nicer if a Teensy T-shirt was included in the deal.
  23. Thanks for checking with your Teensy. I tried...

    Thanks for checking with your Teensy. I tried something similar and I noticed that when I connect a write between the D0 pin to VCC the interrupts stop, when I connect the same wire to GND the...
  24. I have measured the voltages at the INT0 pin and...

    I have measured the voltages at the INT0 pin and when the button is not pressed the voltage reads 4.5V. When I press the button and keep it down it reads -0.003V.

    It seems to be responding in...
  25. Cannot get button to work with external interrupt

    Hi,

    I'm trying to get a button to work on a Teensy 2.0 with C + Makefile but to no avail.

    Here's the code:


    #include <avr/io.h>
    #include <avr/interrupt.h>
    #include <util/delay.h> ...
  26. The biggest drawback IMHO is that's not battery...

    The biggest drawback IMHO is that's not battery powered and needs a cord to an external power supply.
  27. Replies
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    I think a have found the culprit. I have a...

    I think a have found the culprit. I have a transceiver connected to the Teensy (1.0) and it seems the transmitter is messing up the USB connection. I've now removed power and it seems to download OK.
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    Why won't downloading code work?

    I'm currently unable to load code into my Teensy. I read somewhere that it might have to do with the user code previously programmed into the device.

    My question is: how can this be? When I press...
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    Isn't it much easier to add a MicroSD adapter? ...

    Isn't it much easier to add a MicroSD adapter?

    Like this one, for example. It includes logic level converters so you can just run your Teensy at 5V and still use it (MicroSD uses 3.3V by default).
  30. Replies
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    Ok thx, it probably doesn't make that much...

    Ok thx, it probably doesn't make that much difference for my application, I gather.
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    An INF is just a configuration text file, isn't...

    An INF is just a configuration text file, isn't it?
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    Teensy 3.1 UART

    Looking at the specs it seems the Teensy 3.1 and 3.0 both have 3 UARTS but the Teensy 3.1 has 2 UARTS with FIFO's whereas the Teensy 3.0 only has 1.

    What would be the advantage of having a FIFO?...
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    Excellent work

    Excellent work
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    Bulding your own CAD symbols and footprints is...

    Bulding your own CAD symbols and footprints is mandatory for almost everyone who designs PCB's for the reasons stated before: you can't trust anyone's footprints and there will often be parts which...
  35. How much processing power is being used by the...

    How much processing power is being used by the Power Meter? I'm wondering if the Teensy is still able to perform other tasks in an amplifier, for example.
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    What software did you use for designing the PCB?

    What software did you use for designing the PCB?
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    Two second reset

    When you currently press the button on the Teensy it jumps into the bootloader. Can't the bootloader code be modified to reset the Teensy when the button is held down for, say, two seconds? That...
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    Cheaper Teensy

    Any chance of a cheaper Teensy based on the LogicGreen LGT8F88A? The AVR Teensy's aren't terribly expensive, but for a small production run it would be nice to have rock-bottom priced version. If...
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    I ordered (and received) the Teensy3 Audo board....

    I ordered (and received) the Teensy3 Audo board. Are the outputs sufficient to drive an amplifier line-in or do I need to add OPAMP amplification?
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    Thanks Paul. That would work, but I'm preferably...

    Thanks Paul. That would work, but I'm preferably looking for a really high quality audiophile DAC, such as Burr-Brown, Woolfson or ESS.
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    Anyone know a good audio DAC breakout board?

    I've been trying to purchase this DAC for a couple of months now but the company seems to be derelict and the website hasn't been updated in months.

    Anyone know a comparable good audio DAC...
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    I use Windows XP as my main operating system...

    I use Windows XP as my main operating system every day. I've developed and am still developing my Teensy projects under XP. So backwards compatibility would be nice.

    About 1/3rd of all PC users...
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    Nice. But you can already use it if you know how...

    Nice. But you can already use it if you know how to program in C. The only thing needed is a breakout board and MicroElektronica has one, supposedly.
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    Please read this...

    Please read this Paul
  45. Replies
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    I've used a power measuring wall wart to test the...

    I've used a power measuring wall wart to test the power consumption and it uses 4W continuously. That's probably because I'm not using interrupts for the keys or sleep mode.

    I'm keeping the power...
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    Why not run everything (including the LED display...

    Why not run everything (including the LED display and keyboard) on the Raspberry Pi?

    You could use a Sparkfun serial LED display, to cut down on the I/O's.
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    The short answer would be: 'yes' since the board...

    The short answer would be: 'yes' since the board uses SPI and Teensy3 certainly supports that bus type.

    However, you will have to program the library to access the VSxxxx MP3 chip all by yourself...
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    You should be able to use LibTomCrypt...

    You should be able to use LibTomCrypt, which is written in ANSI C. It supports many ciphers, including AES and RSA.

    Don't forget to use a chaining mode (I recommend CBC mode) and an IV (e.g. all...
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    My advice would be to switch to the Raspberry Pi...

    My advice would be to switch to the Raspberry Pi since the Teensy 3++ is bound to be very close to its price tag. The RP Model A is a full-fledged Linux computer which you can hook up to a monitor...
  50. I've also noted some span in the threads....

    I've also noted some span in the threads. Someone's account got hacked and spam sent through it or they themselves are spammers.
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