On Paper: How To Communication to and Control the LCD
To communication to the LCD we need to make sure that the LCD is not busy. When the LCD is ready, the Enable must be triggered and the read/write should be off and the RS should be on if a character is sent, or off if a command is sent.
The sending of the data must be on the data bus for at least 500 ns. nop is used to create this waiting time.
The enable must be off to inform the LCD that the data is sent.
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