Nominal Animal

Thanks! This backs up my claim and understanding, because the only difference between the two (25+ MB/s vs. under 5 MB/s) is how Serial.write() is called in the Teensy sketch. Based on this, we can recommend Teensy developers use a buffer (buf)...

I've now gathered a more complete set of results from my local USB serial benchmark testing for analysis/comparison. Teensy hardware setup #1 (block writes): Teensy 4.0 running sketch given in post #7 above (as posted, unmodified i.e. using...

And for completeness, works absolutely fine on Linux as well.

If you want, you could change the Teensy sketch (replacing #if 0 with #if 1), with no changes to the Linux program. You should see the transfer rate drop down to 4-5 MB/s. (To repeat, the only difference is that the #if 1 version uses...

[ Please see post #11 below for a more complete report, including results for both block writes & single writes ] OK, I've gathered my local USB serial benchmark testing results for analysis/comparison. Teensy hardware setup: Teensy 4.0...

@Nominal Animal : I'll give this a try later today. I have one fairly powerful laptop (modern gaming machine . . . I don't game much, but before retirement, I did lots of linux software development, & typically tested with anywhere from three to...

Here is the sketch I use for Teensy USB Serial benchmarking: // SPDX-License-Identifier: CC0-1.0 // Size of outgoing buffer constexpr size_t packet_size = 32; constexpr size_t packet_words = packet_size / 4; uint32_t...

It's not that. The 4 to 5 MB/s limit occurs when you use Serial.write() for each byte to be sent, instead of filling a buffer (of up to Serial.availableForWrite() bytes) and send the filled buffer using Serial.write(buffer, bytes). If you use a...

I like using TI TXU0n0m unidirectional voltage level shifters. In this case, a TXU0101 would work well. It works at up to 200 Mbit/s rates, with the 5.0V-to-3.3V (or vice versa) propagation delay being 11ns maximum. TI recommends using a 0.1nF...

The DNS update reached me too, and everything seems to work fine. I did have to set my avatar image, but I'm not sure I had one set before. Other than that, everything seems to have transferred over correctly. (y)