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    You can get the Adafruit ones from Mouser without...

    You can get the Adafruit ones from Mouser without the EAR restriction: 485-4622
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    Good to know that works, and very simple. I'll...

    Good to know that works, and very simple. I'll look at that approach, as I'm probably over-thinking it.
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    Thanks for the responses everyone. I'm respinning...

    Thanks for the responses everyone. I'm respinning a custom board to replace T4.1 with MM.

    I have 50W 48VDC stepping down to 12VDC (quarter brick), then I typically make 5V/1A for T4.1, but...
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    So is there a best practice recommendation for...

    So is there a best practice recommendation for Micromod with external power and having USB plugged in at the same time, and can run on one or the other, but not both.

    I typically cut the...
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    Great news. Any guess on a rough release...

    Great news. Any guess on a rough release timeframe for these new Teensys?
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    Im not familiar with tdm, whats the baud rate? Is...

    Im not familiar with tdm, whats the baud rate? Is it point to point or multidrop? Do you need full duplex?

    Consider this chip MAX3490AEGSA+
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    I'm getting same issue with latest versions in...

    I'm getting same issue with latest versions in Github. The 1.54 Teensyduino release libs are good.

    warning:

    lib/FNET/src/stack//fnet_tcp.c: In function '_fnet_tcp_initial_seq_number_update':...
  8. Solved

    I confirmed that v 1.0.1.0 (couldn't find v1.1.1) fixes the issue. Thank you very much!
  9. @luni, I'm seeing this issue again (had forgotten...

    @luni, I'm seeing this issue again (had forgotten about it, and mentioned it in the Teensyduino 1.54 Released thread). All I have to do is update FNET from 4.6.3 to 4.7.0 (or 4.7.1) to see errors, ...
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    Thanks luni, it looks to be a VisualTeensy or...

    Thanks luni, it looks to be a VisualTeensy or library issue on my end, I'll start a new thread.
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    I upgraded to 1.54 (clean- uninstalled Arduino,...

    I upgraded to 1.54 (clean- uninstalled Arduino, then reinstalled), along with VisualTeensy 1.0.0

    I can compile, but get these multiple definition errors with FNET. I'm using the one in...
  12. OK, you ready for some fun? First thing you...

    OK, you ready for some fun?

    First thing you can try - use your voltmeter, checking ground differentials.

    Connect black lead of your Fluke (I hope you have a decent meter with DC mV readout)...
  13. Do you have a schematic? You have power and...

    Do you have a schematic?

    You have power and ground in loops? I would think a single point, star configuration would be better. Loops have always caused me grief.
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    There have been some updates to NativeEthernet,...

    There have been some updates to NativeEthernet, will these get rolled into the next beta or release?
  15. If you map the pins on a t4.1, you will see it...

    If you map the pins on a t4.1, you will see it can handle 4 motors using hardware quadrature decoding, 11khz is no problem. Use interrupts for tight loop timing.
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    Same chip, so same speed

    Same chip, so same speed
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    Yes, grab yourself a CAN to USB or CAN to SD data...

    Yes, grab yourself a CAN to USB or CAN to SD data logger (tindie might have some) and look at the packets while you turn knobs and stuff.

    For setup, you need to know bit rate (you said close to...
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    Mike, Many Teensy devices have CANBUS support...

    Mike,

    Many Teensy devices have CANBUS support built into the chip, but you still need to add the transceiver. Typically a one of these

    A Teensy 4 and this board would provide the hardware:...
  19. So taking the 2 equations for this TVS:...

    So taking the 2 equations for this TVS: https://www.ti.com/product/ESDS312

    Eq1 Vclamp=5V@1A & Vw = 3.3V, Rs = 1.7ohms

    Eq2 Vmax=57V Rp> 12.98ohms, so a 13ohm is suggested here. This feels better...
  20. As the 4.1 PHY is a TI part, these might be...

    As the 4.1 PHY is a TI part, these might be better than the microchip docs?

    https://www.ti.com/lit/ug/tidues1a/tidues1a.pdf

    Here is an older doc:...
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    I'm certainly interested. Ethernet is a huge win...

    I'm certainly interested. Ethernet is a huge win on the T4.1 The chip actually supports 2 PHYs, would love to see a dual 10/100 teensy 4.2, but NativeEthernet needs some fixes.
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    I donít think USB would work, as it talks to boot...

    I donít think USB would work, as it talks to boot loader. Simplist is connect UART TX board 1 to UART RX of the other and vice versa.
  23. Teensy 4.1 Rework vs pull recommendations

    I have a blown DP83825 (shorted ground to one of the TX/RX pins). That pesky ground pin is hard to get at and takes a ton of heat.

    I have 2 options, replace the chip or replace the T4.1. The T4.1...
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    The Teensy core is already handling the reception...

    The Teensy core is already handling the reception of serial via interrupt and loading into a buffer for you.

    If you wish to do something more than that in the interrupt, you should be able to...
  25. Is it possible to update the secure RTC via NTP...

    Is it possible to update the secure RTC via NTP or download, to today's date and then recall that in future boot ups without a battery connected so all my data logging dates are not Jan 1, 2019?
    ...
  26. Hey, you're welcome. I don't have any examples...

    Hey, you're welcome. I don't have any examples I've tested, but found this, might be a good place for you to start: https://linuxhint.com/send_receive_udp_python/

    I think once you have it working...
  27. Your error is likely because your UDP_IP is...

    Your error is likely because your UDP_IP is wrong, this needs to be the eth0 IP of the Raspberry Pi. Do a ifconfig on pi terminal to get the IP address of the eth0. Post here if you are unsure.
    ...
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    From here, looks like you need a CR (0x0D or /r):...

    From here, looks like you need a CR (0x0D or /r): http://www.film-tech.com/ubb/f16/t003312.html

    Try these, one should work.

    CP750.print("help\r");
    CP750.print("help\n");
    ...
  29. The Python code I had was printing binary...

    The Python code I had was printing binary packets.

    If you are sending ASCII strings, you can use this, found over here: https://www.raspberrypi.org/forums/viewtopic.php?t=184241


    import socket...
  30. Ports are usually blocked by computer firewalls,...

    Ports are usually blocked by computer firewalls, by default. At least, they should be. This is to protect the computer from bad actors trying to send data into ports.

    On Raspbian terminal, type...
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    See...

    See https://forum.pjrc.com/threads/62932-Teensy-4-1-MAC-Address?p=252049&viewfull=1#post252049
  32. NativeEthernet was created to take advantage of...

    NativeEthernet was created to take advantage of the ethernet controller built inside the iMXRT chip. This should be more efficient and faster than an external controller, which is what the WIZNET is....
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    Dropping UDP packets after bootup?

    When I boot up, I'm noticing that sent UDP packets are dropped for initial ~30 seconds after bootup. Is that normal?

    If I use DHCP, no dropped packets, but there is a 60 sec DHCP time.

    Static...
  34. Valid points, that's why I said you have to do...

    Valid points, that's why I said you have to do the engineering for the application, which may not be indoor use. It may be intended for a Christmas display, could be outdoors, exposed to rain and...
  35. So 1 T4.1 to drive 13 DC servo motors with...

    So 1 T4.1 to drive 13 DC servo motors with ethernet?

    Figure 42 pins available, not including ethernet.

    For a brushed DC servo, 2 wires to drive is minimum, like PWM/DIR or PWM-FOR/PWM-REV....
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    VisualTeensy is what you need.

    VisualTeensy is what you need.
  37. HardwareSerialX.cpp, in the Teensy Core X = 1...

    HardwareSerialX.cpp, in the Teensy Core

    X = 1 thru 8, pick the one(s) you are using

    Edit this line (#38) which is 64 by default, here I've changed it to 256for my application.


    #define...
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    What exact pins are CanTX & CanRX & CanRS tied...

    What exact pins are CanTX & CanRX & CanRS tied to?

    Tie Rs to ground thru a 10K. No need to bring it to the Teensy.

    I left Vref as NC.
  39. Try increasing your serial buffer in hwserial

    Try increasing your serial buffer in hwserial
  40. Are you using VisualTeensy? From my...

    Are you using VisualTeensy?

    From my understanding, VisualTeensy will setup a copy of your libraries (pulls from Arduino, Teensyduino or your shared folder) inside your VSC project. If you have...
  41. As with just about anything, operate the device...

    As with just about anything, operate the device beyond the rated capabilities and you risk damage. I've smoked a few $800 DC servo motors in my career, possibly the highest quality you can buy, made...
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    xoxu, I'd like to see your fork, can you point me...

    xoxu, I'd like to see your fork, can you point me in that direction?
  43. Sounds like a neat project. What do you mean...

    Sounds like a neat project.

    What do you mean by "low power"? How fast do you want the 20g mass to move up? What's your budget?

    If you have the power budget, off the shelf stepper drivers can...
  44. T4 SSD1322 OLED taking 24mS to refresh, serial data gets stale, add interrupt?

    Teensy 4.1 driving a Newhaven SSD1322 256x64x4bit OLED takes about 24mS to update using U8G2 on SPI 4 wire. I maxed out the SPI rate to 10Mhz (max rate on SSD1322 spec, Tcycle = 100nSec).

    OLED...
  45. I used output compares back in the early 90's on...

    I used output compares back in the early 90's on old Motorola (NXP used to be Freescale and before that, Motorola) HC11s, creating one shot and PWM outputs, but they can be configured for pretty much...
  46. Look at output compare

    Look at output compare
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    Correction, led is controlled by ethernet PHY.

    Correction, led is controlled by ethernet PHY.
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    It should be controlled by the library, but make...

    It should be controlled by the library, but make sure you are on the network. Confirm by pinging the teensy's IP.
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    Questions regarding code security T4

    To level set, I'm aware of the T4 thread on security, but rather than hijack that deep discussion, had a few questions regarding a low-volume (in the dozens), limited run, closed source application...
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    Yes, that works. I should have had 0x10, not 10. ...

    Yes, that works. I should have had 0x10, not 10. Thank you.
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