I would guess that LabViews "OutPort" function writes to either
memory-mapped or IO-mapped addresses using the host system's CPU.
USB devices are not memory mapped, so that function is not likely to
be useful for communicating with a USB device.
I think you will need more information from LabView (are special
drivers needed to communicate with USB devices). What is the
protocol/interfce that these drivers support? How are they accessed
from a LabView program?
Perhaps someone with direct LabView/USB experience can point you in
the right direction.
David Ferguson
USB Software Team
Apple
On Mar 19, 2007, at 5:11 AM, David Gaskell wrote:
Hi,
I'm developing a program in LabView to communicate with a USB
device (Delcom-Cypress USB microcontroller). Has anyone here any
experience using LabView with USB devices?
I've found a function in LabView called OutPort the description
given is "This is used to copy data values to the system's physical
memory within the port I/O range beginning at the address
specified." The fuction takes a 16 bit address as an input and up
to 32 bits of data to transfer.
When I run the 'USB Prober' utility the USB device is recognised
successfully with the description 'Low Speed Device @6
(0x18210000) Composite Device......USB I/O Controller'. Is the hex
number here the port address? If that is the case then it's a 32bit
address which is too long to be used as the input of the OutPort
function?
Any advice would be much appreciated.
Thanks,
Dave.
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