Hi! Thank you for your answer.

1. Why do you do a second enable after reading the Busy Flag ?

The first enable is for busy testing, the second is because HD44780 outputs 3th bit of address counter

Have you set the ddram address to a valid value before ?

Yes. Remember that it is working in 8-bit mode. I can send you complete code if you want.

I asked my friend to do the same. He has wrote his own code. And his result of lcd reading was the same. What we are doing wrong?

Regards,
Jacek