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48 VXI Programming Using the IEEE 1394 Serial Bus Chapter 3
Locating Shared Memory Using HP VISA
For HP VISA programs, the E8491A shared memory starting address is
obtained using the function:
viGetAttribute
and the VXI interface attribute:
VI_ATTR_MEM_BASE
The HP VISA version of the example “Storing Readings in Shared
Memory” demonstrates the use of this function and attribute.
Locating Shared Memory Using SICL
For SICL programs, the E8491A shared memory starting address is found
using the function:
ivxirminfo
This function fills the structure struct vxiinfo. The item within the structure
containing the starting address is memstart. The SICL version of the
example program showing the use of shared memory demonstrates the use
of this function and structure.
Locating Shared Memory by Viewing the Resource Manager
Output
The third method of determining the E8491A’s shared memory starting
address is to view the resource manager output. “Viewing the Resource
Manager Output” in Chapter 2 describes how this is done using the ‘I_O
Config’ utility. Figure 3-3 shows the section of the output that indicates A24
address mapping.
Another way to view the output is using the SICL ivxisc utility contained in
the <drive:>\siclnt\bin or sicl95\bin directory. This utility is an executable
that is used with the SICL logical unit number (see “Editing the HP E8491A
Configuration” in Chapter 2) to return the configuration output of the
resource manager. Again, Figure 3-3 shows a partial listing of the output.
Note Refer to Appendix B for additional information on using ivxisc and for an
example of the complete configuration output.