Forum Rule: Always post complete source code & details to reproduce any issue!
Tab Content
  • brtaylor's Avatar
    08-03-2022, 05:33 PM
    I tried that and it didn't help any. At least from my perspective, everyone that booted worked perfectly except for having to re-seat a few in the connector. I'm not sure what's happening with the two that aren't...
    33 replies | 860 view(s)
  • brtaylor's Avatar
    08-03-2022, 03:07 PM
    I tested 19 boards. Most passed the test. Out of the 19, I had a couple that I needed to re-seat in the MMOD connector and then they worked. I have two that won't boot at all (i.e. I can't even get the raw hid to show...
    33 replies | 860 view(s)
  • brtaylor's Avatar
    08-03-2022, 01:51 PM
    So far, your program is just reporting Pin 22 and Pin 28 as high. Looking at this image, I can't find those on the ATP board: https://forum.pjrc.com/attachment.php?attachmentid=25533&d=1628355409
    33 replies | 860 view(s)
  • brtaylor's Avatar
    08-03-2022, 01:30 PM
    I have a ton of Teensy micromods sitting around, and the ATP board, so I can help do this test. Is there an easy chart showing the pin number relation to the MMOD ATP board location? i.e. the program is reporting Pin 22...
    33 replies | 860 view(s)
  • brtaylor's Avatar
    07-19-2022, 03:19 PM
    No. Of course this is library specific, but most SPI libraries should be setting the CS pin to digital output, setting the pin to low when selecting the device and returning the CS pin high when de-selecting the device....
    3 replies | 95 view(s)
  • brtaylor's Avatar
    07-19-2022, 02:45 PM
    Yes, because in the code, you're pulling each CS pin high before you start using any of the SPI devices. In hardware, you are using resistors to pullup the CS pin high before using any of the SPI devices. In both cases...
    3 replies | 95 view(s)
  • brtaylor's Avatar
    07-15-2022, 04:59 PM
    That's a good board to start with. All of the packages have leads, which makes visual inspection and re-work possible. I recommend using a stencil with solder paste and a toaster oven to assemble a board like that. OSH...
    9 replies | 1569 view(s)
  • brtaylor's Avatar
    07-06-2022, 05:36 PM
    Hey Don, I wrote some software many years ago that wraps around a Linux UART to give a HardwareSerial interface so that I could run the same code on both a Teensy and a BeagleBone Black. It's attached, below. It's...
    6 replies | 206 view(s)
  • brtaylor's Avatar
    06-29-2022, 08:09 PM
    brtaylor replied to a thread uNav INS in General Discussion
    Agree completely with everything you mention. It is very application dependent and you need to pick the sensors and the time update / measurement update scheme to match dynamics. I'll try to remember to post some data...
    780 replies | 219750 view(s)
  • brtaylor's Avatar
    06-29-2022, 07:34 PM
    brtaylor replied to a thread uNav INS in General Discussion
    That is a possibility, I recall that there is a cutoff where older GPS receivers don't work with the newer library (the biggest offender IIRC is that uBlox changed the size of the UBX-NAV-PVT packet), but I don't recall...
    780 replies | 219750 view(s)
  • brtaylor's Avatar
    06-29-2022, 06:41 PM
    brtaylor replied to a thread uNav INS in General Discussion
    I've had plenty of luck estimating attitude, inertial velocity, and inertial position of manned and unmanned aircraft with MEMS sensors and GNSS aiding. To be clear, the EKF is only using the GNSS data as the...
    780 replies | 219750 view(s)
  • brtaylor's Avatar
    06-29-2022, 02:58 PM
    brtaylor replied to a thread uNav INS in General Discussion
    A lot of your errors are build-system related. The error below is indicating that you don't have C++14 or newer available with the compiler. C:\...\libraries\units-main\src/constants.h:44:20: warning: variable...
    780 replies | 219750 view(s)
  • brtaylor's Avatar
    06-29-2022, 02:06 PM
    brtaylor replied to a thread uNav INS in General Discussion
    Are you using Arduino with Teensyduino for compilation? I've lost track of the uNavINS code on this forum, but the EKF was rolled into here: https://github.com/bolderflight/navigation ekf_15_state.h is the 15...
    780 replies | 219750 view(s)
  • brtaylor's Avatar
    06-28-2022, 04:21 PM
    Interesting, that's news to me that PJRC has started manufacturing both versions. I just checked the SparkFun 16771 stock that I have and it has the ethernet.
    7 replies | 467 view(s)
  • brtaylor's Avatar
    06-28-2022, 04:08 PM
    If you read the item description, it's the same as the SparkFun Mfg # 16771, which is here: https://www.sparkfun.com/products/16771 Having recently bought a ton of these from SparkFun, it is a Teensy 4.1 without...
    7 replies | 467 view(s)
No More Results
About brtaylor

Basic Information

About brtaylor
Location:
Santa Fe, NM
Interests:
Drones, State-Estimation, Programming
Occupation:
CEO, Bolder Flight Systems Inc.

Statistics


Total Posts
Total Posts
779
Posts Per Day
0.33
Last Post
New Teensy MicroMods defective 08-03-2022 05:33 PM
General Information
Last Activity
Today 02:29 PM
Join Date
03-21-2016