Programming
Chapter 5
SCXI-1100 User Manual
5-10
© National Instruments Corporation
For example, you want to scan 13 modules. Twelve modules are in one chassis, and the 13th is
in the second chassis and is to be scanned through a 14th module that is cabled to the data
acquisition board but is not involved in the scan. Program the 12 modules in the first chassis
according to the steps listed in the previous Multiple-Module Multiplexed Scanning section, and
program the 13th and 14th modules according to the Channel Scanning from the SCXI-1100 via
Another Module section earlier in this chapter.
3. Programming the Slot 0 Hardscan Circuitry
The following section describes how to program the Slot 0 circuitry for scanning operations. For
a more detailed description of the Slot 0 scanning circuitry, consult the SCXI-1000/1001 User
Manual. Descriptions of the Slot 0 registers are given in the Slot 0 Register Descriptions section
in Chapter 4, Register Descriptions.
To program the hardscan circuitry, perform the following steps:
1. Write binary
0000 0000
to the HSCR.
2. Write binary
0000 1000
to the HSCR.
3. Write the Slot 0 scan list to the FIFO.
4. Write binary
0010 1100
to the HSCR.
5. Write binary
101S 1100
to the HSCR.
6. Write binary
101S 1110
to the HSCR.
7. Write binary
101S 1111
to the HSCR.
To program the hardscan circuitry to use the current scan list, perform the following steps:
1. Write binary
0000 1000
to the HSCR.
2. Write binary
0100 1000
to the HSCR.
3. Write binary
0000 1000
to the HSCR.
4. Write binary
0010 1100
to the HSCR.
5. Write binary
101S 1100
to the HSCR.
6. Write binary
101S 1110
to the HSCR.
7. Write binary
101S 1111
to the HSCR,
In the preceding steps:
S
=
0
if you want the scanning to repeat when the end of the list is reached.
S
=
1
if you want the circuitry to shut down after a single scan.