PC8574 I2C Interface with LCD

Projects Programming
1

Hi all,

Recently I wanted to learn about PC8574 and also interface this IC with LCD and program the LCD only using 2 pins. However, what I found mostly online is they direct using the library instead of manual programming.

I would like to know how actually the IC PC8574 been programmed to display text on LCD.

Anyone got any ideas ?

Thanks and appreciated.

2

Anyone got any ideas ?

Look at the library?

3

the 8574 does not put text on the display,
it is effectively a register that can set 8 output lines at a time.

these 8 data lines are connected to the 8 input lines of a standard LCD

for a library check - Arduino Playground - PCF8574Class - might work