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Document Type: Example Program
NI Supported: Yes
Publish Date: Mar 15, 2007

Handling DMA Input Overflows and Underflows using LabVIEW FPGA to Guarantee Lossless Data Transfers

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Filename: dma_input_overflow.zip
Requirements: View

This example shows how to correctly implement a DMA transfer mechanism containing the possibility of overflow (too much data for the buffer to handle) or underflow (not enough data is being sent). The implementation makes sure the buffer is never full on the FPGA side for overflow and never times out waiting for data on the host side for underflow. In order to guarantee lossless data transfer between an FPGA and Host overflow and underflow conditions must not occur.

Requirements


Filename: dma_input_overflow.zip

Software Requirements


Application Software: LabVIEW Professional Development System 8.2
Toolkits and Add-Ons: LabVIEW FPGA Module 8.2

Hardware Requirements


Hardware Group: Reconfigurable I/O (RIO)
Driver: NI-RIO 2.1

 
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This example program (this "program") was developed by a National Instruments ("NI") Applications Engineer. Although technical support of this program may be made available by National Instruments, this program may not be completely tested and verified, and NI does not guarantee its quality in any way or that NI will continue to support this program with each new revision of related products and drivers. THIS EXAMPLE PROGRAM IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND AND SUBJECT TO CERTAIN RESTRICTIONS AS MORE SPECIFICALLY SET FORTH IN NI.COM'S TERMS OF USE (http://ni.com/legal/termsofuse/unitedstates/us/).