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Flow Control Mode - HELP!
Posted: Wed Feb 21, 2007 10:00 pm
by Curtiss
Does anyone have a more informative description of actually how to use flow control mode? I am using a GLK12232-25 and have a lot of fields on the screen that need to be updated.
The datasheet seems to hint that drawing white rectangles to block out the old characters uses a lot of overheads? But doesn't suggest a suitable work-around?
Thanks,
Curtis
Posted: Wed Feb 28, 2007 11:50 am
by Raquel
Hello Curtiss,
Thank you for your post.
Flow control is implemented when command 254 / 58 / Almost Full value / Almost Empty value / is sent to the GLK12232-25-SM. You can find more details about this on page 16 of the
manual
The implementation of rectangles in the GLK12232-25-SM PCB 1.4 does take a lot of overhead because it draws the rectangle pixel by pixel. Unfortunately, there isn't really a work around this; it is suggested that flow control is used to be able to find out if the module is busy processing so as not to overrun the buffer with commands / data.
If I can get your email address, I would like to tell you more about a new GLK12232-25-SM PCB 2.0 that we are currently working on. We strongly recommend that new designs be based on this new PCB.
Best Regards,