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Setting Buffer Size for the NI-CAN Read and Write Functions

Primary Software: Driver Software>>NI-CAN
Primary Software Version: 2.3
Primary Software Fixed Version: N/A
Secondary Software: N/A
Hardware: Industrial Communications>>CAN

Problem:
Can I set a buffer size for my CAN reads and writes using NI-CAN?

Solution:
If you are using the Channel API, you can't set the buffer size for CAN reads because all memory management for the Channel API is done by the system RAM. However, if you are using the Frame API, you can configure the queue length using the ncConfigCANObj.vi or equivalent C function ncConfig.  Below are the vi and the cluster on the front diagram for CAN Object Config, where the Read Queue Length and Write Queue Length are the buffer sizes.

Related Links:
KnowledgeBase 1YD93QRM: How Large Can I Make the Read and Write Queues For NI-CAN?
Product Manuals: NI-CAN Hardware and Software Manual and Specifications

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Report Date: 04/27/2006
Last Updated: 03/27/2009
Document ID: 3WQLCN5N

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