Calibre UK PICA93LV Benutzerhandbuch
CALIBRE
Issue 1.3
Page 30
22/07/99
THE MOST COMMONLY ASKED I2C QUESTIONS
6.1.
General Questions
Question
Will my adapter run I2C clock speeds greater than 90KHz?
Answer
At the moment your adapter is limited by the Bus Controller chip fitted, to a maximum
of 90KHz as a master and 100KHz as a slave.
of 90KHz as a master and 100KHz as a slave.
Question
Will my adapter work under Windows NT4* or Windows 95*?
Answer
The adapter will work under both these systems without problems. If you need to
access the Windows NT and Windows 95 DLLs please contact our sales team for
further information.
access the Windows NT and Windows 95 DLLs please contact our sales team for
further information.
* All trade marks acknowledged
Question
I get corrupted transfers why is this?
Answer
The most likely reason for corrupted transfers is either incorrect bus termination or
excessive capacitance - see the manual for details.
excessive capacitance - see the manual for details.
Question
Do you have software to talk to my........?
Answer
Unfortunately there are too many I2C devices for us to be able to offer complete
solutions - although we can supply a windows based application called WINI2C which
is designed for those just starting I2C or wishing to perform simple I2C tasks, please
contact our sales team or look on our web site,
solutions - although we can supply a windows based application called WINI2C which
is designed for those just starting I2C or wishing to perform simple I2C tasks, please
contact our sales team or look on our web site,
for further
information.
Question
I am trying to read from a device, the first time my software works fine but when
I try again I can't get anything what's wrong?
I try again I can't get anything what's wrong?
Answer
Please check that you are changing the value of Setnack in accordance with the
manual, it is likely that you have not made Setnack 1 for the last AND last but one
bytes being read.
manual, it is likely that you have not made Setnack 1 for the last AND last but one
bytes being read.
6.2.
DOS Software Questions
Question
My I2C adapter locks up with a constant status - why?
Answer
If you are using either the 'C' or Basic library functions supplied with the adapter on a
fast PC it is possible that the PC is polling the status register too quickly, the simplest
way to prevent this is to add a small delay prior to reading the status in the getstatus
routine. Alternatively use the windows DLL supplied as these automatically allow for
speed of the PC at run-time.
fast PC it is possible that the PC is polling the status register too quickly, the simplest
way to prevent this is to add a small delay prior to reading the status in the getstatus
routine. Alternatively use the windows DLL supplied as these automatically allow for
speed of the PC at run-time.
6.3.
WINDOWS 95 and NT Questions
Question
My software cannot find the adapter. Your Windows software reports that it
cannot configure the adapter. Why is this?
cannot configure the adapter. Why is this?
Answer
Have you registered the device driver as detailed in the software manual? If so check
that the address links (see adapter manual for details) are correct for the location at
which you registered the driver.
that the address links (see adapter manual for details) are correct for the location at
which you registered the driver.
Question
I think I have registered the driver how can I find out if I have?
Answer
You need to inspect the registry as follows