- In general, the alphanumeric LCD displays have 8 data lines and 3 control pins, if you have to connect these displays to your microcontroller project we required min 6 pins ( 4-bit mode + rs and enable)
- For reduce the pins required to interface LCD, Here we use a one extra microcontroller ATMEGA32 (Arduino Uno), ATMEGA16, ATMEGA8 can be used
- This extra microcontroller has connected to LCD with 4-bit data mode interface and interface with other microcontroller using TTL/serial interface, means this microcontroller acts like more mediate between the LCD and other Microcontroller for reducing interface pins
- The code is written using Arduino IDE
- This code provided a very basic frame format and fewer features
- Futures will be added later
-
The serial frame format to display the required string on display is
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[LCD-CORDINATES(coloumrow)] [WHITESPACE] [DATA] -
LCD cordinates means if its 16x2 lcd then the row and coloum number starts from 1
-
EXAMPLE
- To display hello world on 16x2 LCD from the second row from 3rd color onward
- we have to send
32 hello worldto serial (first column number next without space row number) - Presently they ae many bugs and lacks of features in this code will update the futures later