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Type: Posts; User: Ishkabbible

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    Thanks Paul. That is the purpose of U4 - the...

    Thanks Paul. That is the purpose of U4 - the PROG_INPUT# line goes back to a GPIO on the main flight computer so it can virtually "push the PROG button" in case our Teensy code gets corrupted by a...
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    Thanks Paul - you answered my question while I...

    Thanks Paul - you answered my question while I was typing.
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    Mysteriously working now

    I decided to see what the waveforms looked like when I pressed the PROG button. While I was pushing the button and adjusting the trigger program in the logic analyzer to capture the JTAG activity, on...
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    VBAT is powered through a PMEG40T10ERX schottky...

    VBAT is powered through a PMEG40T10ERX schottky diode from the main 3.3V. Verified that the VBAT voltage is 3.28V
    16778
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    Custom Teensy 3.6 - K66 not booting

    I am sending a couple of Teensys to the edge of space. Unfortunately, after thermal cycling a PJRC Teensy 3.6 I found cracks in some of the solder balls, so I have to go with a custom design using...
  6. Heading up to Denver next week to install it in...

    Heading up to Denver next week to install it in the Software Test Lab at Lockheed, where it will be connected to an exact copy of the spacecraft computer.
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  7. Fit check - fits. 11819 Tomorrow, the smoke...

    Fit check - fits.
    11819

    Tomorrow, the smoke test.....
  8. PCBs from Advanced Circuits - tried out their $33...

    PCBs from Advanced Circuits - tried out their $33 for any size 2-layer board offer, very happy with the quality.
    11818
  9. Breadboarded and software verified. Had some...

    Breadboarded and software verified.
    Had some debugging fun - the optoisolators have a slight assymetry between the turn on and turn off time, and the Teensy is actually fast enough to capture it...
  10. Absolutely. Ordered the quick-turn PCBs...

    Absolutely. Ordered the quick-turn PCBs yesterday, Teensys and other parts should arrive tomorrow. Software is already ported from the PIC environment and tested on my simple breadboard. I hope to...
  11. The Teensy is simulating the mechanical portion...

    The Teensy is simulating the mechanical portion of the cameras. Poly has a much more complicated mechanical system than map and sam. THe board is designed to simulate both map and sam, or just poly,...
  12. I am an EE at the University of Arizona Lunar and...

    I am an EE at the University of Arizona Lunar and Planetary Lab - We have a long history of providing instruments for NASA missions, going back to Apollo. We have more recently moved into doing...
  13. This is running a simulator that will stay...

    This is running a simulator that will stay planted firmly on the ground. I think the odds of this processor surviving more than a week in space are vanishingly small :)
  14. [queued] Teensy has joined the space program

    Teensy 3.2 is replacing a grossly under-powered PIC processor in the camera simulator used to validate the commands we plan on sending to the cameras on the OSIRIS-REx spacecraft.
    Pictured is a...
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    Advice on porting code from ++2.0 to 3.2

    My project has outgrown the Teensy++ 2.0, so I want to migrate to the 3.2. I think I can squeeze myself into the lower pin count, but I have a few thousand lines of C code written in the Arduino...
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