Digital pot 257 steps - confused!

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  1. - 9th September 2010, 01:47 #2
    HankMcSpank's Avatar
    HankMcSpank
    HankMcSpank is offline Senior Member
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    ok, i'M burning the midnight oil - and after spending ages on this problem, almost the minute after I posted here i sorted it.

    Here was the offender (on my PIC)..

    Code:
    SSPSTAT.6 = 0
    it should be SSPSTAT.6 = 1 ....... I reckon that due to that setting (clock edge to tx data on) my digipot was therefore missing a data bit ...which essentially offset the data I was sending it. (which didn't cause a knockon effect to the command byte, because the digipot SPI control bits are i the middle of the first byte sent & were all zeros)
    Last edited by HankMcSpank; - 9th September 2010 at 01:50.
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