LCD-Integrated Bascom and AVR

The project was designed for Bascom program to handle two main types of liquid crystal display including alphanumeric and graphic.

The most common alphanumeric type of LCD can display characters, number, and special characters. It uses a Hitachi HD44780 as display controller where the chip designation is written on the back. The most common LCD contains 2 line and 16 characters per line. There are eight data lines in the HD44780 LCD type which can be controlled in a more economical way by using four upper lines. Four I/O pins will be saved on the controller.

In the default 4-bit bus mode, the sending of data will take two writes for each 8-bit to send which tends to be slow. The 8-bit bus should be chosen if the LCD needs to be as fast as possible.

The default pin is the data mode where the individual pins can be selected for each LCD pin which will provide the most flexibility in choosing the I/O configuration of the controller. The standard alphanumeric LCD has 14 pins where Pin 1 is Ground, Pin 2 is Vcc, Pin 3 for LCD contrast, and Pin 5 is R/W.

Read more and avr/using an lcd/index.html