Void initialization ()

{

LC den = 0；

write _ com(0x 38)； Delay (50); //Delay should be added.

write _ com(0x0e)； Delay (50);

write _ com(0x 06)； Delay (50);

}

Give it a try.

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In addition, it is too complicated to display only three digits in the end, and the calculation process is too complicated.

Theoretically:

What results should be displayed when ad = 255?

What results should be displayed when ad = 0?