Now a day’s message display boards are used at different places like railway stations, public places, universities, colleges, hospitals, general stores etc for giving information. Scrolling message means sliding text vertically or horizontally. Scrolling doesn’t change the layout of the text but moves the users view across what is apparently a large message that is not wholly seen. They can be used to attract the attention of viewers also. Suppose if a message written horizontally longer than will fit on the screen, it can’t be display completely on the screen. By using scrolling message display units the viewers can see the message. In our project, we will use the vertical scrolling.
In this project, we will learn How to scroll characters in a 16X2 alphanumeric LCD with AVR ATmega16 microcontroller. Here, we will scroll the display from bottom to top. There is command for vertical scrolling like command for horizontal scrolling. The vertical scrolling can be implemented by developing logic in the program. First, we will display “ABLab Solutions” in 1st row and “Bhubaneswar” in 2nd row of 16X2 alphanumeric LCD. After 500 milli second, we will display “Bhubaneswar” in 1st row and “www.ablab.in” in 2nd row of 16X2 alphanumeric LCD. Again after 500 milli second, we will display “www.ablab.in” in 1st row and “info@ablab.in” in 2nd row of 16X2 alphanumeric LCD. Again after 500 millisecond we will display “info@ablab.in” in 1st row and “ABLab Solutions” in 2nd row of 16X2 alphanumeric LCD. And the above process continues forever. In this way, we can implement the vertical scrolling in a 16×2 alphanumeric LCD.
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