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FIFO Partial Flag does not work?
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FIFO Partial Flag does not work?

byeyear posted on 30 Jan 2012 7:58 PM PST
Top Contributor
29 Forum Posts

Hello,

    I want to use FIFO partial flag in my project, and I use example "SlavefifoSync" as start.

    I modified flagb as Current_Thread_DMA_WaterMark in GPIF Designer, and generated a new .h file.

    Then, I inserted following line into function CyFxSlFifoApplnStart(...):

    apiStatus = CyU3PGpifSocketConfigure(3, CY_FX_CONSUMER_PPORT_SOCKET, 2, CyFalse, 0);

    The flaga works well, but the flagb does not work. It keeps logic high.

    Can someone help me.

Best, regards.




Re: FIFO Partial Flag does not work?

byeyear posted on 30 Jan 2012 09:57 PM PST
Top Contributor
29 Forum Posts

Ok, I have known the reason.

It seems that the partial flag will only be valid after FIFO data counter "crossing" the watermark.

It will not be valid if FIFO data counter keep higher than watermark.






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