Hi everyone! I'm trying to use Arduino Due for my little project and was expecting the communication bandwidth to be at least ~15MB/s for my use. I saw that the Native port supports up to 480MB/s throughput while Arduino due runs at ~80MHz, so I assumed it would definitely satisfy my request. Howe…

[image] glock_k: the speed is roughly only 520KB/s While the Due theoretically supports high-speed USB, I doubt whether the Due Serial driver, or the CDC Driver in most host implementations, will implement that sort of speed on a COM port.

For speed testing, I suggest doing writes in big chunks. Reading/writing 4 bytes at a time is very inefficient for USB. When using 480 Mbits/sec USB the fundamental packet size is 512 bytes. Try writes in 512, 1024, 2048, or 4096 chunks. Whatever you use on the PC should also read in multiples o…

[image] Icebuster: st doing writes in big chunks. Reading/writing 4 bytes at a time is very inefficient for USB. When using 480 Mbits/sec USB the fundamental packet size is 512 bytes. Try writes in 512, 1024, 2048, or 4096 chunks. Thanks for your suggestion Icebuster! However, I think ardu…

That's indeed what I'm worried about...

The Teensy 3.2 would probably be a better choice. Paul Stoffregen spent a lot of time optimizing the native USB serial data transfer.

[image] dependence of DUE Native USB port transfer speed on data length Arduino Due I'm working on writing a reusable Arduino <-> Python communications library for scientific instruments, and as part of that I would like to transfer data at high speed to Python running on …

Native USB port speed not as expected?

Official Hardware Mega Due

Icebuster October 28, 2021, 10:40pm 7

Topic		Replies	Views
dependence of DUE Native USB port transfer speed on data length Due	2	12168	March 15, 2013
Arduino Due - Serial speed? Due	29	61504	December 14, 2012
Due native USB stops responding after ~17 min with Arduino IDE 2 open ("No device found on COMx", Serial Monitor can't connect): cause and workaround Due	2	132	October 16, 2026
ARDUINO DUE Native Port Baudrate Can't Go Up. Due	4	2716	May 29, 2019
USB Serial Baud Rates? ... or other faster USB communication methods? Due	9	79585	April 16, 2015

Native USB port speed not as expected?

Related topics