M
M. Kincheloe
We are using a USB controller called a 'miniLab' and a Dell PC to run a
machine. Here's a link to the device's home page.
http://www.measurementcomputing.com/cbicatalog/cbiproduct_new.asp?dept_id=349&pf_id=1522
The miniLab comes with modules you can use in VB and others, which we
used to make a simple VB application to control the machine. It works
very well except one problem. When the machine is left on over night
(just idling, not activly doing anything) an error is displayed 'Cannot
install interrupt handler. IRQ already in use.' According to the
user's manual 'The miniLab relies upon the Microsoft Human Interface
Device (HID) class drives. The HID class drivers ship with every copy
of Windows that is designed to work with USB ports.' One speculative
cause of the problem was that this communication channel gets reset or
times out after a certain length of inactivity. Does anyone have any
information about this inner workings of the HID class? Or any
experience with a simular problem? Or suggestions on alternate places
to post me question?
Thanks in advance,
Matthew Kincheloe
machine. Here's a link to the device's home page.
http://www.measurementcomputing.com/cbicatalog/cbiproduct_new.asp?dept_id=349&pf_id=1522
The miniLab comes with modules you can use in VB and others, which we
used to make a simple VB application to control the machine. It works
very well except one problem. When the machine is left on over night
(just idling, not activly doing anything) an error is displayed 'Cannot
install interrupt handler. IRQ already in use.' According to the
user's manual 'The miniLab relies upon the Microsoft Human Interface
Device (HID) class drives. The HID class drivers ship with every copy
of Windows that is designed to work with USB ports.' One speculative
cause of the problem was that this communication channel gets reset or
times out after a certain length of inactivity. Does anyone have any
information about this inner workings of the HID class? Or any
experience with a simular problem? Or suggestions on alternate places
to post me question?
Thanks in advance,
Matthew Kincheloe
