STM32 for Beginners | Writing 4-Bit Library for HD44780 Character LCD

HD44780 character LCD is mostly used in 4 bits instead of 8 bits mode to conserve the microcontroller IO lines. This demonstration is extension of our previous series of tutorials in which we had written and discussed in detail the 8 bits library. We have ported the existing 8 bits library, written in previous section to the new 4-bits LCD library. This will complement your personal collection of LCD libraries as well as learn something new.