Register Offset - HP E1328A User Manual

Register Offset

Computer
HP E1300/01 IBASIC
(Absolute Addressing) READIO (-9826, Base_addr + offset)
WRITEIO -9826, Base_addr + offset; data
(positive select code = byte read or write
negative select code = word read or write)
(select code 8)
READIO (8, Base_addr + reg number)
WRITEIO 8, Base_addr + reg number; data
VXI:READ? logical_address, offset
External Computer
VXI:WRITE logical_address, offset, data
(over HP-IB to
HP E1300/E1301
Mainframe or
HP E1405/E1406 DIAG:PEEK? Base_addr + offset, width
Command Module) DIAG:POKE Base_addr + offset, width, data
V/382 Embedded READIO (-16, Base_addr + offset)
Computer WRITEIO -16, Base_addr + offset; data
(C-Size system)
(positive select code = byte read or write
negative select code = word read or write)
HP RADI-EPC7 iwpeek((unsigned short *)
Embedded Computer (base_addr + offset))
with SICL
iwpoke((unsigned short *)
(base_addr + offset),data)
LADDR: HP E1328A logical address = 72
(LADDR * 64) : Multiply quantity then convert to a hexadecimal number (e.g. (72 * 64)
16
When using DIAG:PEEK? and DIAG:POKE, the width (number of bits) is either 8 or 16.
58 HP E1328A Register-Based Programming
The register offset is the register's location in the block of 64 address bytes
that belong to the module. For example, the module's Status/Control
Register has an offset of 04
the offset is added to the base address to form the register address:
D200 + 04
16 16
53,760 + 4 = 53,764
Table B-1 shows the general programming method for accessing the
HP E1328A registers using different computers.
Table B-1. Accessing the HP E1328A Registers
Programming Method
. When you write a command to this register,
16
= D204 1FD200 + 04
16 16
or
2,085,376 + 4 = 2,085,380
Base_addr = 1FC000
or
= 2,080,768 + (LADDR * 64)
offset = register offset (Figure B-2)
Base_addr = LADDR * 256
reg number = register offset (Figure B-2)/2
Module logical address setting (LADDR)
offset = register offset (Figure B-2)
Base_addr = 1FC000
or
= 2,080,768 + (LADDR * 64)
offset = register offset (Figure B-2)
Base_addr = C000
or
= 49,152 + (LADDR * 64)
offset = register offset (Figure B-1)
INST device_name;
device_name = iopen
("vxi, logical address");
base_addr = imap
(device_name, I_MAP_VXIDEV,0,1,NULL);
16
= 1FD204
16 16
Base Address
+ (LADDR * 64)
16 16
+ (LADDR * 64)
16 16
+ (LADDR * 64)
16 16
= 1200 )
16
Appendix B