03-07-2016
Everything that Don asked plus:
Do you know what USB standard the ARM 7 hardware and the USB stick is? USB 1, 2 or 3?
From what you describe CPU at 1% utilisation, it sounds like it could be waiting I/O. If either is USB 1 then that could be the problem.
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LEARN ABOUT DEBIAN
uplcom
UPLCOM(4) BSD Kernel Interfaces Manual UPLCOM(4)
NAME
uplcom -- USB support for Prolific PL-2303/2303X/2303HX serial adapters driver
SYNOPSIS
To compile this driver into the kernel, place the following lines in your kernel configuration file:
device uplcom
device ucom
Alternatively, to load the driver as a module at boot time, place the following line in loader.conf(5):
uplcom_load="YES"
DESCRIPTION
The uplcom driver provides support for various serial adapters based on the Prolific PL-2303, PL-2303X and PL-2303HX USB-to-RS232 Bridge
chips.
The device is accessed through the ucom(4) driver which makes it behave like a tty(4).
HARDWARE
The uplcom driver supports the following adapters:
o ATEN UC-232A
o BAFO BF-800
o BAFO BF-810
o Belkin F5U257
o ELECOM UC-SGT
o HAL Corporation Crossam2+USB IR commander
o Hama USB RS-232 Serial Adapter
o Hamlet exagerate XURS232
o IOGEAR UC-232A
o I/O DATA USB-RSAQ
o I/O DATA USB-RSAQ2
o I/O DATA USB-RSAQ3
o Mobile Action MA-620 Infrared Adapter
o PLANEX USB-RS232 URS-03
o RATOC REX-USB60
o Radio Shack USB Serial Cable
o Sandberg USB to Serial Link (model number 133-08)
o SOURCENEXT KeikaiDenwa 8 (with and without charger)
o Sony Ericsson USB Cable (Susteen USB Data Cable)
o Willcom W-SIM DD PHS terminal.(WS002IN)
SEE ALSO
tty(4), ucom(4), usb(4)
HISTORY
The uplcom driver appeared in NetBSD 1.6. This manual page was adopted from NetBSD by Tom Rhodes <trhodes@FreeBSD.org> in April 2002.
BSD
November 22, 2006 BSD