Hi everybody,
I am writing an application for ascension technologies minibird 3D
tracker. (www.ascension-tech.com).
from the documentation:
configured as DCE (i have for sure the correct type of cable)
RTS - if high device is switched to standby mode, if low it works
DTR - used for flow control, but internally pulled high -(so no flow
control is needed, because its ignored)
CTS and DSR are high when device is on.
I made small test application, which sends one byte on device in it 's
test mode.....the device should echo every character sent to it.
this application works great on standard serial port, on standard PC
compatible computer (/dev/ttyS0)
simplified test application:
open port, O_RDWR
1. set RTS OFF (ioctl TIOCMSET)
2. set CS8, CREAD, CLOCAL, B115200, VMIN 0, VTIME 20 (tcsettatr
TCSANOW), other flags = 0
3. send any one character (write)
4. read from port (read)
close port
but heres the problem, when connecting through usbserial (vendor ST lab
/dev/ttyUSB0), it just doesnt work without a sleep in between steps 1
and 2. on my notebook (hp nx7000) sleep(1) is enough. When I try between
steps 1 and 2 ioctl TCIOMGET it says RTS is OFF, but I think in real it
isnt and I have to sleep to get it working. I tried replace sleep with
various flush, drain etc...
am I doing something wrong or is there need of any special commit or
something like it for usbserial ?
thanks for your answer.
tomas.
linux configuration:
------------------------------
distro: Mandrake cooker
kernel: Linux version 2.6.0-1mdk ([EMAIL PROTECTED])
on desktop computer and notebook used same distro and version of linux.
modinfo usbserial
author: Greg Kroah-Hartman, [EMAIL PROTECTED],
http://www.kroah.com/linux/
description: USB Serial Driver core
license: GPL
parm: debug:Debug enabled or not
parm: vendor:User specified USB idVendor
parm: product:User specified USB idProduct
vermagic: 2.6.0-1mdk 586 gcc-3.3
modinfo pl2303
description: Prolific PL2303 USB to serial adaptor driver
license: GPL
parm: debug:Debug enabled or not
vermagic: 2.6.0-1mdk 586 gcc-3.3
depends: usbcore,usbserial
alias: usb:v067Bp2303dl*dh*dc*dsc*dp*ic*isc*ip*
alias: usb:v067Bp04BBdl*dh*dc*dsc*dp*ic*isc*ip*
alias: usb:v04BBp0A03dl*dh*dc*dsc*dp*ic*isc*ip*
alias: usb:v0557p2008dl*dh*dc*dsc*dp*ic*isc*ip*
alias: usb:v056Ep5003dl*dh*dc*dsc*dp*ic*isc*ip*
alias: usb:v0EBAp1080dl*dh*dc*dsc*dp*ic*isc*ip*
alias: usb:v0DF7p0620dl*dh*dc*dsc*dp*ic*isc*ip*
alias: usb:v0584pB000dl*dh*dc*dsc*dp*ic*isc*ip*
alias: usb:v2478p2008dl*dh*dc*dsc*dp*ic*isc*ip*
alias: usb:v1453p4026dl*dh*dc*dsc*dp*ic*isc*ip*
alias: usb:v0731p0528dl*dh*dc*dsc*dp*ic*isc*ip*
MUDr. Tomáš Hosszú
Dpt. of Neurosurgery
Faculty Hospital
Hradec Králové
Czech Republic
mobile: +420 604284131
e-mail: [EMAIL PROTECTED]
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