National Instruments NI-488.2 ユーザーズマニュアル

Make sure there is a GPIB interface in your computer that is properly 
configured both in hardware and software using a valid base I/O address by 
running the NI-488.2 Troubleshooting Wizard, as follows:

1.

Select Start»Programs»National Instruments NI-488.2»Explore 
GPIB.

2.

Select Help»Troubleshooting»NI-488.2 Troubleshooting Wizard.

The Troubleshooting Wizard tests your GPIB interface and displays 
the results.

EDMA occurs if a system DMA error is encountered when the NI-488.2 
software attempts to transfer data over the GPIB using DMA.

Possible solutions for this error are as follows:

•

You can correct the EDMA problem in the hardware by using the 
NI-488.2 Configuration utility to reconfigure the hardware to not use a 
DMA resource.

•

You can correct the EDMA problem in the software by using 

ibdma

 to 

disable DMA.

EOIP occurs when an asynchronous I/O operation has not finished before 
some other call is made. During asynchronous I/O, you can only use 

ibstop

, 

ibnotify

, 

ibwait

, and 

ibonl

 or perform other non-GPIB 

operations. If any other call is attempted, EOIP is returned. 

Resynchronize the driver and the application before making any further 
NI-488.2 calls. Resynchronization is accomplished by using one of the 
following functions: 

ibnotify

If the 

ibsta

 value passed to the 

ibnotify

 callback 

contains CMPL, the driver and application are 
resynchronized.