Question

A very important way to communicate information to users -- a true step up from 7-segmenet LEDs:

What are the advantages and disadvantages associated with using an alphanumeric LCD in an embedded system? What types of cursor control are commonly available on alphanumeric LCDs? After programming with PC1602F this week, how does the mbed BusOut object help to simplify interfacing an alphanumeric display?

Answer 1

A 16*2 alphanumeric LCD is installed in embedded trainer board.The LCD help to perform all its operation by using 4 data bits from each microcontroller.

Advantages of alphanumeric LCD:

Reduced size

Moderate cost

Convinence of mounting the LCD in circuit board.

Cursor control

• Cursor home
• Cursor on/off
• Cursor shift
• Display character blink

In the mbed,the four on the LED s helps in forming the BusOut interfacing.It is used to prevent the creation of extra wired connection.

BusOut is used to write number of Digitalout pins that can written as numeric value.