KS0108ReadData()

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hi, ks0108readdata() 1 of functions of display controller software interface created original owner (fabian thiele) , later modified arduino team (michael margolis). read display data function call twice function ks0108doreaddata(). highly appreciated if 1 familiar software can explain logic behind callling function twice. thanks.

from datasheet:

"to read contents of display data ram, twice access of read instruction needed. in first access, data in display data ram
is latched output register. in second access, mpu can read data latched. is, read data in display data
ram, needs dummy read. status read not needed dummy read."


Arduino Forum > Forum 2005-2010 (read only) > Software > Development > KS0108ReadData()


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