[lkml]   [2006]   [Oct]   [12]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
Messages in this thread
    SubjectRe: [PATCH 2.6.19-rc1 update 2] drivers: add LCD support
    Excuse me, also:

    On 10/12/06, Paulo Marques <> wrote:
    > Also, what do these "nop"'s do? Isn't there a way to read the "busy"
    > status from the controller and just write as fast as possible?

    I found another bug that "changes" randomly the "startline" value. I
    spent a _lot_ of time checking what would be the smallest way to have
    the work done without any problem.

    If you remove 1 of the 2 nops (after _address()), you will get some
    flickering on one of the controllers, about 15 times per minute. If
    you remove both, the "evil" controller do worse things.

    Really, I have been trying a lot of ways to improve it and find the
    explanation of that weird changes, and the best algorithm I found it
    the one I have sent. Dirty, but it works safely. I also tried with
    different timings and delays, but they didn't work. The only way I
    found is to make the LCD do such "nop" operations.
    To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
    the body of a message to
    More majordomo info at
    Please read the FAQ at

     \ /
      Last update: 2006-10-12 18:09    [W:0.021 / U:0.492 seconds]
    ©2003-2016 Jasper Spaans. hosted at Digital OceanAdvertise on this site