FIFO Functions
Owning Palette: Synchronization Functions
Installed With: FPGA Module. This topic might not match its corresponding palette in LabVIEW depending on your operating system, licensed product(s), and target.
Use the FIFO Read and FIFO Write functions to transfer data from one loop to another using FIFOs in an FPGA VI, such as among single-cycle Timed Loops. You also can use the FIFO Write function to transfer data to host VIs using a DMA FIFO.
 | Note This palette is specific to FPGA targets and contains a subset of the VIs and functions that are on this palette when you edit a Windows or RT target VI. |
The VIs and functions on this palette can return general LabVIEW error codes, specific FPGA Module error codes, or error codes specific to the FPGA target.
| Palette Object | Description |
|---|---|
| FIFO Clear | Clears a target-scoped or VI-scoped FIFO on the FPGA. You cannot use the FIFO Clear function with DMA FIFOs. To clear DMA FIFOs from the host VI, use the Stop method on the Invoke Method function. |
| FIFO Read | Reads the oldest element in an FPGA FIFO and removes the element from the FIFO. |
| FIFO Write | Writes an element to an FPGA FIFO. |
| VI-Scoped FIFO Configuration | Represents a VI-scoped FIFO. Right-click the node and select Properties from the shortcut menu to display the FPGA FIFO Properties dialog box. Use the FPGA FIFO Properties dialog box to configure the VI-scoped FIFO. |