Latest activity

  • R
    I have a project with two Teensy 4.1 talking to each other over RS485. One is the main controller for the project the other is mainly a RS485 to USB relay with some additional logging on the SD card and a few other things. I program these two...
  • UHF
    Yes, ammonium hydroxide (plus the non-pure water it's dissolved in) will conduct. Use isopropanol and a toothbrush to clean off flux.
  • P
    Excellent suggestion. I only need a minute or so resolution so writing once a minute would be quite fine for me!
  • P
    You could try periodically writing the time to EEPROM. Then when you power up, read the time. That will be the last time the Teensy was alive.
  • BriComp
    You could try periodically writing the time to EEPROM. Then when you power up, read the time. That will be the last time the Teensy was alive.
  • P
    Here is a curved ball question: On my old projects, I use an MCP79410 RTC chip. One of the nice things it has is two registers to capture the time of power failure and restore. (Provided you have the VBAT active) I was just wondering, is there...
  • mjs513
    Looks like, maybe some of the pins, actually do have INPUT select, which did not show up when I searched for them back then. Not sure if the Rev3 manual updated some of this? Or I just missed them. Try changing the table in HardwareSerial.cpp...
  • KurtE
    Looks like, maybe some of the pins, actually do have INPUT select, which did not show up when I searched for them back then. Not sure if the Rev3 manual updated some of this? Or I just missed them. Try changing the table in HardwareSerial.cpp...
  • KurtE
    Just as a side note for testing purposes ported over my old Buddabrot example:
  • A
    Yes. But the propagation delay is up to 66ns. If your clock goes through the buffer and then the data comes back through the buffer then that gives you a worst case of 132ns between the clock edge and the data being ready. Assuming an instant...
  • T
    I do finally have this working! The solution was to put in a delay between usb.begin() and serial.begin() I'm guessing it was just happening too quickly and so the BAUD was not being correctly set to 9600 as needed by the device. Here's the...
  • mjs513
    Just as a side note for testing purposes ported over my old Buddabrot example:
    • IMG_1277.jpg
  • mjs513
    mjs513 reacted to jmarsh's post in the thread New USB Host library for Teensy 4.x with Like Like.
    I've written a new USB Host support library for Teensy 4.x boards: https://github.com/A-Dunstan/teensy4_usbhost Key features: - dynamic driver instantiation, e.g. can support any number of hubs or other devices since driver objects can be...
  • mjs513
    mjs513 reacted to wwatson's post in the thread New USB Host library for Teensy 4.x with Like Like.
    Exellent work:D Tried the USBHost storage "basic.ino" on a FAT32 formatted USB stick through a HUB. Result: Found a FAT32 partition. Checking free space... Done. Bytes free: 30812176384 of 30927306752 (99%) --- FILE LISTING BEGIN --- DIRECTORY: /...
  • mjs513
    mjs513 reacted to KurtE's post in the thread New USB Host library for Teensy 4.x with Like Like.
    Looks like fun. Who knows, maybe it can replace the USBHost_t36... I always wanted to use something like threads, but... Note: If I try to clone it using Windows github desktop it gives me a real strange error message. Maybe the submodule...
  • T
    No, I made all tests on Saturday!. I just tried the new committed files and now works perfectly the I2S output alongside the USB
  • H
    So, All 4 ADCs need SCLK, I assume they are coupled? are they using one isolater each or one for all pins. Could it be a "load" matter? I did only a brief scan of the datasheets. But I can not see the exact diagram how yuo coupled the SCLK to...
  • B
    We are trying to build a custom teensy board. Currently we are experiencing the double blinking error, indicating JTAG not responding or improper power startup sequence. We have tried 3 PCBs, and the issue is same (perhaps the issue is with our...
    • schematics.png
  • L
    Hi, I have a setup with multiple Teensy 4.1's connected together using various serial busses, including the use of CTS + RTS pins on every connection. All of the CTS pins are using XBAR pins, and I am using low/high inverters on the RTS->CTS...
  • S
    KurtE , joepasquariello , jmarsh Thanks so much for your findings and solutions , THis helped me me fixed EEPROM issue.
  • R
    Another quick update: @mjs513 and myself have been doing some testing with this and as the library now builds for both Micromod and Teensy 4.1 We (he) renamed the library up on github. The current Project and branch is up at...
  • J
    Something you might want to look at is the jpg_server example, for the camera stuff you were working on - it uses QNEthernet to set up a basic webserver to stream continuous jpeg images. You could reuse the EthernetClient related functions to...
  • wwatson
    wwatson reacted to jmarsh's post in the thread New USB Host library for Teensy 4.x with Like Like.
    The CD stuff is a bit of fun... when I get around to it I want to write an ISO9660 filesystem library, so the files can actually be accessed. But in the meantime there's an example that can use CD drives to play audio, and if they have an SPDIF...
  • J
    The CD stuff is a bit of fun... when I get around to it I want to write an ISO9660 filesystem library, so the files can actually be accessed. But in the meantime there's an example that can use CD drives to play audio, and if they have an SPDIF...
  • M
    MichaelMC reacted to jmarsh's post in the thread New USB Host library for Teensy 4.x with Like Like.
    I've written a new USB Host support library for Teensy 4.x boards: https://github.com/A-Dunstan/teensy4_usbhost Key features: - dynamic driver instantiation, e.g. can support any number of hubs or other devices since driver objects can be...
  • KurtE
    Another quick update: @mjs513 and myself have been doing some testing with this and as the library now builds for both Micromod and Teensy 4.1 We (he) renamed the library up on github. The current Project and branch is up at...
  • mjs513
    Quick udpate: I merged it into the main branch. Created a backup branch. Not sure when it will be picked up in a Teensy beta and release. No idea when those might happen.
  • KurtE
    Nice, Now I don't feel so bad about my clean desks😀
  • KurtE
    Quick udpate: I merged it into the main branch. Created a backup branch. Not sure when it will be picked up in a Teensy beta and release. No idea when those might happen.
  • M
    Very good. Just so happens I decided to do exactly that a few hours ago. Thorough rubbing alcohol clean with qtips. Then dry it. It appears to be working fine now:) Before, it would be working or not depending how long I had it powered it seemed...
  • defragster
    defragster reacted to jmarsh's post in the thread New USB Host library for Teensy 4.x with Like Like.
    I've written a new USB Host support library for Teensy 4.x boards: https://github.com/A-Dunstan/teensy4_usbhost Key features: - dynamic driver instantiation, e.g. can support any number of hubs or other devices since driver objects can be...
  • defragster
    defragster reacted to KurtE's post in the thread New USB Host library for Teensy 4.x with Like Like.
    Looks like fun. Who knows, maybe it can replace the USBHost_t36... I always wanted to use something like threads, but... Note: If I try to clone it using Windows github desktop it gives me a real strange error message. Maybe the submodule...
  • J
    jremington replied to the thread Small bandwith FFT analysis.
    The Goertzel algorithm is essentially a single point FT, and is used for fast tone detection. May need fine tuning, though. https://en.wikipedia.org/wiki/Goertzel_algorithm You can find code examples in just about any language. One here, with...
  • KurtE
    KurtE reacted to wwatson's post in the thread New USB Host library for Teensy 4.x with Like Like.
    Exellent work:D Tried the USBHost storage "basic.ino" on a FAT32 formatted USB stick through a HUB. Result: Found a FAT32 partition. Checking free space... Done. Bytes free: 30812176384 of 30927306752 (99%) --- FILE LISTING BEGIN --- DIRECTORY: /...
  • KurtE
    Looks like fun. Who knows, maybe it can replace the USBHost_t36... I always wanted to use something like threads, but... Note: If I try to clone it using Windows github desktop it gives me a real strange error message. Maybe the submodule...
  • C
    Beer likely has conductive elements in it and that could be shorting out places on the board. I'd wash it thoroughly then let it dry. Contrary to popular belief, most circuit boards handle water just fine, so long as they aren't on. In fact...
  • R
    you could look at some of the standalone "Mixx" devices people made with rasberry pie
  • defragster
    defragster reacted to markkimball's post in the thread Teensy 4.0 with odd boot problem with Like Like.
    I found the problem. It is due to a programming issue of my own making. I was having some different problems so I decided to make a pared-down program that just represented the problematic portion, and failed to copy two very important...
  • C
    Hi all, I'm currently using the standard audio library, which requires wav files 44100hz and 16-bit. No other formats work. Are there any solutions that would allow me to accept and play back other file types/settings? Basically, I'd like someone...
  • R
    Thank you so much!!!!
  • R
    Rezo reacted to jmarsh's post in the thread New USB Host library for Teensy 4.x with Like Like.
    I've written a new USB Host support library for Teensy 4.x boards: https://github.com/A-Dunstan/teensy4_usbhost Key features: - dynamic driver instantiation, e.g. can support any number of hubs or other devices since driver objects can be...
  • wwatson
    Exellent work:D Tried the USBHost storage "basic.ino" on a FAT32 formatted USB stick through a HUB. Result: Found a FAT32 partition. Checking free space... Done. Bytes free: 30812176384 of 30927306752 (99%) --- FILE LISTING BEGIN --- DIRECTORY: /...
  • PaulStoffregen
    Use FASTRUN on your erase function, so it's allocated in RAM. Hopefully that can prevent the inevitable crash long enough to allow accomplishing all the memory erase you want. After erasing, remember the CPU caches will still hold some info...
  • J
    Just a note, I ran the SdFat library SdFormatter example sketch on my 32GB Sandisk Extreme, and I noticed that after the erase, it says "All data set to 0x00".
  • A
    On Sunday I committed some changes. Did you already use this code? Can you post a short example that I can use to reproduce the problem?
  • S
    skylight replied to the thread sketch self-delete in runtime.
    I'll see what I can do. Thanks a lot!
  • L
    Well... now it works. After sitting on the bench for 5 hours, I plugged it in and it works. The only explanation I can think of is this... 1. I soldered the pins to the board as usual... 2. I soaked the board in household ammonia to...
  • PaulStoffregen
    I've written a new USB Host support library for Teensy 4.x boards: https://github.com/A-Dunstan/teensy4_usbhost Key features: - dynamic driver instantiation, e.g. can support any number of hubs or other devices since driver objects can be...
  • KurtE
    KurtE reacted to jmarsh's post in the thread New USB Host library for Teensy 4.x with Like Like.
    I've written a new USB Host support library for Teensy 4.x boards: https://github.com/A-Dunstan/teensy4_usbhost Key features: - dynamic driver instantiation, e.g. can support any number of hubs or other devices since driver objects can be...
  • wwatson
    wwatson reacted to jmarsh's post in the thread New USB Host library for Teensy 4.x with Like Like.
    I've written a new USB Host support library for Teensy 4.x boards: https://github.com/A-Dunstan/teensy4_usbhost Key features: - dynamic driver instantiation, e.g. can support any number of hubs or other devices since driver objects can be...
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