National Instruments NI 783xR Manuel D’Utilisation

You can create your own custom measurements using the fixed I/O 
resources. For example, one application might require an event counter that 
increments when a rising edge appears on any of three digital input lines. 
Another application might require a digital line to be asserted after an 
analog input exceeds a programmable threshold.

You can implement LabVIEW logic and processing in the FPGA of the 
R Series device. Typical logic functions include Boolean operations, 
comparisons, and basic mathematical operations. You can implement 
multiple functions efficiently in the same design, operating sequentially or 
in parallel. You also can implement more complex algorithms such as 
control loops. You are limited only by the size of the FPGA.

Figure 1-1 shows an FPGA connected to fixed I/O resources and a bus 
interface. The fixed I/O resources include A/D converters (ADCs), D/A 
converters (DACs), and digital I/O lines.

Figure 1-1.  High-Level FPGA Functional Overview

Software accesses the R Series device through the bus interface, and the 
FPGA connects the bus interface and the fixed I/O to make possible timing, 
triggering, processing, and custom I/O measurements using the LabVIEW 
FPGA Module.

FPGA

Bus Interface

Fixed I/O Resource

Fixed I/O Resource

Fixed I/O Resource

Fixed I/O Resource