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  • J
    Until now you haven't said what you are trying to accomplish. I mentioned that you can calculate speed because that is often what one does with a relative encoder. What are you doing with the encoder, and how fast is it going to turn (revs/sec or...
  • mjs513
    @wwatson - @KurtE Started playing with your new library for the RA8876 using 8080 8bit mode on a T4.1. Running into a couple of issues Anyways started running through the example sketches and mixed results using a T4.1 by the way. Running the...
  • J
    I'm trying to write a new driver and running into a few issues. It's a USB based device (actually not one specific device but any RNDIS class interface) so may not be present when the EthernetClass object is initialized. This causes several...
  • mjs513
    mjs513 reacted to jmarsh's post in the thread New USB Host library for Teensy 4.x with Like Like.
    When I added the submodule I used the ssh (git@) URL instead of the web (HTTPS: ) URL. Changing it to https has let github desktop check out the repo without any issues.
  • mjs513
    mjs513 reacted to jmarsh's post in the thread New USB Host library for Teensy 4.x with Like Like.
    I tested cloning with github desktop just now and I didn't get any error message, it just stalled indefinitely at the submodule. So I filed an issue. You can clone the TeensyAtomThreads library by itself...
  • PaulS
    PaulS replied to the thread AUDIO BOARD.
    You may want to have close look at this page where all the information about the audio adapter is available [schematic, wiring, mounting, reference to the Audio library, etc]. The audio adapter can be used for both the Teensy 4.0 and the Teensy...
  • J
    When I added the submodule I used the ssh (git@) URL instead of the web (HTTPS: ) URL. Changing it to https has let github desktop check out the repo without any issues.
  • PaulS
    PaulS replied to the thread Teensy 4.1FreqMeasureMulti Library.
    You don't need to use a levelshifter since the output stage of the encoder you referenced above has "NPN open collector output circuit". See this thread for more info. So just power it by 5V. But do I correctly understand that you want to drive a...
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  • T
    TRGD replied to the thread Teensy 4.1FreqMeasureMulti Library.
    So what you're suggesting is basically to get a slice of time and getting the speed with delta x / delta t? My question would this result in any steps being missed? And to then translate this to replicate the movement on the stepper would I just...
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  • M
    There were reports several years ago that the Wire library did not play well with other devices that generate lots of interrupts. Two ADCs interrupting 3000 times per second may be enough to mess with Wire transmissions. Getting the Crash...
  • T
    TRGD replied to the thread Teensy 4.1FreqMeasureMulti Library.
    Yes, I do have them with INPUT_PULLUP. Unfortunately the encoder I have is locked down with another project but I believe it is that same one you have there so I expect I would get a similar output. I've uploaded a picture of the encoder and it...
    • IMG_5957.jpg
  • S
    sRGB565 reacted to defragster's post in the thread Game Console with iMXRT1062 with Like Like.
    :) If there is a 'best' common feature set, then getting that working in one batch would be a good start for proof of concept. The Star interconnect should 'simply' work - but look how long sliced bread took :) Getting it wired and then...
  • S
    sRGB565 reacted to theboot900's post in the thread Game Console with iMXRT1062 with Like Like.
    This is a super cool idea!! I'm curious on the link between the cpu and the gpu. Graphicly what does the cpu handle? Does it send vertex data etc every frame? Or is that all loaded initially on the gpu and the gpu will handle all screen...
  • J
    Hello @jmarsh, Thank you for helping me with this. I think I found the file and referenced it specifically. However, it didn't appear to produce anything of value: C:\Users\jeffs\AppData\Local\Temp\arduino_build_571724>"C:\Program Files...
  • J
    Hello @kd5rxt-mark, Thank you for helping me with this. I turned this setting on, but it didn't produce anything obvious to me. Here is the new feedback at Serial Monitor: CrashReport: A problem occurred at (system time) 8:48:27 Code was...
  • mjs513
    Exactly unless we do it for the exercise. But as you said not sure its worth it but then knowing us...
  • mjs513
    Note: We probably could make something that works, Not sure if it is worth it, but, suppose: We define: #define BUS_WIDTH 10 Note in the library currently defined as: #define BUS_WIDTH 9 and define: #define DISPLAY_D0 19 // FlexIO3: 0/ 19...
  • D
    DOY38 replied to the thread AUDIO BOARD.
    Hello, For the Teensy 4.0 how should I do the wiring with the audio card ? Do you have an existing diagram ? Do I need other things to communicate with the Audio card ? I have this picture : I think it connects directly to the top of the audio...
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    • 1719240966604.png
  • T
    Can it be that the modifications changed something on the MIDI SysEx messages? Before implementing this files the sysex were working fine, now I'm receiving different messages that are sent. Place a print on the sysex callback and send a message...
  • A
    The datasheet for the isolator implies the propagation delay is symmetrical high to low and low to high but doesn't explicitly state it. If it was very slightly asymmetrical then that combined with the apparently low slew rate on the outputs...
  • R
    I was going to bitshift into the shifter buffer on the T4.0, that way at least have polling support. interrupt would work as well, but you are limited to around half the capacity of the shifter buffers as you need 16 bits length per 8 bit...
  • KurtE
    Note: We probably could make something that works, Not sure if it is worth it, but, suppose: We define: #define BUS_WIDTH 10 Note in the library currently defined as: #define BUS_WIDTH 9 and define: #define DISPLAY_D0 19 // FlexIO3: 0/ 19...
  • C
    Hello, first post and sorry if this has been asked before. Are there any plans for future teensy board with usb-c connection? Pins are of course there, and adaptors exist. And turning a new rev has cost. Just curious. 4.0 and 4.1 are great...
  • J
    I think you might not have the right build of addr2line. You should be using the one that gets installed with Teensyduino. It's buried somewhere under tools/teensy-compile... should be named arm-none-eabi-addr2line.exe.
  • K
    @Jeff_805: Don't know for certain that this will make any difference, but try building with the "Tools / Optimize" setting in the Arduino IDE set to "Debug". Hope that helps . . . Mark J Culross KD5RXT
  • mjs513
    mjs513 reacted to defragster's post in the thread Please stop this spammer with Like Like.
    Always a bummer when good folks suffer for the actions of the spammers having big blocks Blocked :( Found the REPORT on the USER account and used that. Not sure if that can have a setting put an account on 'timeout'? If so, perhaps selectable...
  • mjs513
    mjs513 reacted to PaulStoffregen's post in the thread Please stop this spammer with Like Like.
    The forum's logging shows the new rules that block new user registrations from ASN 45609 are being triggered, one of them only 12 minutes ago and the other a few hours ago. Impossible to know if it's blocking legitimate new users or the same...
  • defragster
    defragster reacted to PaulStoffregen's post in the thread Please stop this spammer with Like Like.
    The forum's logging shows the new rules that block new user registrations from ASN 45609 are being triggered, one of them only 12 minutes ago and the other a few hours ago. Impossible to know if it's blocking legitimate new users or the same...
  • PaulStoffregen
    PaulStoffregen replied to the thread Please stop this spammer.
    The forum's logging shows the new rules that block new user registrations from ASN 45609 are being triggered, one of them only 12 minutes ago and the other a few hours ago. Impossible to know if it's blocking legitimate new users or the same...
  • defragster
    defragster replied to the thread Please stop this spammer.
    Either way - Lots of activity on threads or posts for a first time sign up - not sure of the granularity the BBS offers for startup control. Some BBS's allowed required EMAIL confirm before posts and IIRC Paul didn't want to require such. The...
  • mjs513
    Thanks. @KurtE mentioned that you need 8 consecutive Flexio pins. Looks at the T4 - not possible to get there from here. The T4 does not have 8 consecutive pins. The pins you have: #define DISPLAY_D0 19 // FlexIO3: 0/ 19 #define DISPLAY_D1...
  • mjs513
    mjs513 reacted to BriComp's post in the thread Please stop this spammer with Like Like.
    But yesterday they were making multiple posts on the same thread.
  • BriComp
    BriComp replied to the thread Please stop this spammer.
    But yesterday they were making multiple posts on the same thread.
  • R
    Thanks I will try adding the 0.1uF capacitors! The existing decoupling 10uF caps are approx. 2.5mm from the pin. PCB traces on the isolated gnd side are 10mils / 0.254mm wide, would that qualify as skinny? In my understanding this should be ok...
  • R
    A few things to try... Replace the 10uF capacitors with the recommended 0.1uF capacitors. 10uF has too high an ESR rating to be useful. Or, place a 0.1uF capacitor in parallel with the 10uF. Did you place the isolator Vcc decoupling capacitors...
  • J
    So, I did some digging to figure out how to run "addr2line -e mysketch.ino.elf 0x57B2" as I didn't know a .elf file existed for my application. However, I eventually brought Teensyduino to the foreground, click on "File" and "Open HEX File" which...
  • defragster
    defragster reacted to jmarsh's post in the thread Please stop this spammer with Like Like.
    Is it possible to cap the number of new threads a user can make in 24 hours? I can't really imagine any situation here where anyone would need to create >3 threads in one day.
  • J
    jmarsh replied to the thread Please stop this spammer.
    Is it possible to cap the number of new threads a user can make in 24 hours? I can't really imagine any situation here where anyone would need to create >3 threads in one day.
  • defragster
    defragster replied to the thread Please stop this spammer.
    Always a bummer when good folks suffer for the actions of the spammers having big blocks Blocked :( Found the REPORT on the USER account and used that. Not sure if that can have a setting put an account on 'timeout'? If so, perhaps selectable...
    • 1719198522097.png
  • J
    Wow! Didn't know you could do that. Here is what it reported: CrashReport: A problem occurred at (system time) 19:1:28 Code was executing from address 0x57B2 CFSR: 82 (DACCVIOL) Data Access Violation (MMARVALID) Accessed Address...
  • KurtE
    Try adding CrashReport and see if it shows anything… after Serial.begin… add line if(CrashReport) Serial.print(CrashReport); and see if it prints anything
  • T
    thebigg reacted to PaulStoffregen's post in the thread Please stop this spammer with Like Like.
    Sorry for the delay. I was at the Teardown conference all day. Looking at this just now... Sadly, it seems the spammers from India that plagued the old vbulletin server have returned. I had really hoped we would not need to block huge...
  • R
    I didn't think about propagation delay from the isolator, thank you for your input! I will consider this in the next iteration of the design, and try bypassing the isolator for now. Propagation delay however would just affect the timing of my SPI...
  • R
    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...
  • R
    Thank you. One output line from the ISO7340 is carrying the isolated "manual" SCLK from the Teensy and going directly to the SCLK input of all four ADCs. I considered it might be a load matter but total capacitance should be around 40pF so...
  • R
    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
    Yes, that's exactly what I'd like to do, but there's no warning from the Arduino IDE. One could manually shut down your software, say through the serial terminal, but leaving the Teensy power on, every time you punch for a new build while...
  • J
    Hey All, Individually, these example programs work as expected on a Teensy 4.1 (analog readings are taken and reported to serial monitor / OLED goes through its demonstration). When I combine these two example programs into one (I stripped down...
  • TomChiron
    TomChiron reacted to Northstrix's post in the thread Teensy 4.1 Tetris with Like Like.
    The game of Tetris for Teensy 4.1 Based on the work of Brian Lough Adapted for Teensy 4.1 by Maxim Bortnikov SourceForge page: https://sourceforge.net/projects/teensy-4-1-tetris/ Additionally, it comes with 5 start screens.
  • J
    Could you add some state logic to your application to "shut down" before update? Maybe I misunderstand, but it sounds like you are doing build/update while your system is operating.
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