1602-I2C

Standalone USI driver for 1602 LCD display with I²C bus (HD44780 + PCF8574).

Driver for popular LCD display with 16x2, 16x4, 20x4 resolution and I²C interface provided by additional PCF8574 shift register. Applicable for any AVR ATtiny chip with USI interface support: 24/44/84, 25/45/85, 261/461/861, 87/167, 2313/4313, 1634.

• 100% plain C
• Do not require any external Arduino libraries
• Minimal application about 750 bytes

Included sample test application for ATtiny25 and simulated circuit for Proteus.