How to Interface the 8051 MCU with an LCD Display

In this tutorial, we’ll interface the 8051 microcontroller with an LCD (Liquid Crystal Display) and display a blinking “Hello World” message.

Table of contents

· Table of contents
· Introduction
· Hardware setup
∘ Components
· Understanding the LCD
∘ LCD pins
∘ LCD registers
∘ LCD memory
∘ Other
· Using the control pins
∘ Timing of the write cycle
∘ Putting it all together
· Assembly refresher
∘ For loops
∘ Infinite loops
∘ Subroutines
· Code breakdown
∘ Assigning symbolic names
∘ Define data and commands
∘ Define delay subroutine
∘ Define subroutines to send data and commands to LCD
∘ Define byte-looping subroutine
∘ Define main program
∘ Full code
· About the author
· Sources cited and further reading