[En-Nut-Discussion] LCD_DELAY in avr/dev/hd44780.c

Uwe Bonnes bon at elektron.ikp.physik.tu-darmstadt.de
Thu Sep 7 12:09:51 CEST 2006

>>>>> "Ole" == Ole Reinhardt <ole.reinhardt at kernelconcepts.de> writes:

    Ole> Hi,
    >> Anyone else got the time to add it to the repository? If not, please
    >> post a reminder if it doesn't appear in the CVS within the next days.

    Ole> Yes, I'll do it later on this day. But I'll first take a look on it
    Ole> to understand what's changed in detail.

The data sheet tells:

Enable cycle time               t cycE 1000 ns Figure 25
Enable pulse width (high level) PWEH    450  ns

LcdReadNibble() should try to fullfill that timing in itself, calling
functions shouldn't need add delays after calling that function.

Hope this helps

Uwe Bonnes                bon at elektron.ikp.physik.tu-darmstadt.de

Institut fuer Kernphysik  Schlossgartenstrasse 9  64289 Darmstadt
--------- Tel. 06151 162516 -------- Fax. 06151 164321 ----------

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