This presentation is exhibitting how to does a LCD works and how to use such LCD in you embedded system or robotic project using AVR microcontroller Series. The complete procedure of using 16X2 Character LCD is given in this presentation. Please share your views and queries with us, we are found at- website: http://roboindia.com mail- info@roboindia.com

1. • LCD - Liquid Crystal Display
• Mostly used for Display of Message
• Highly user interactive
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2. • We are using 16x2 character LCD
• 16x2 LCD means max 16 characters per
line can be displayed and there are 2
lines
• Single character is displayed in 5x7 pixel
matrix

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5. • RS – To any pin of your choice
• RW – To any pin of your choice
• E – To any pin of your choice
• D0….D3 – Not Connected
• D4….D7 – PINX,0 …. PINX,3
• D4 must be connected to PIN0 of X PORT
:
• D7 must be connected to PIN3 of X PORT
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6. • RS – To any pin of your choice
• RW – To any pin of your choice
• E – To any pin of your choice
• D0….D3 – Not Connected
• D4….D7 – PINX,0 …. PINX,3
• D4 must be connected to PIN0 of X PORT
:
• D7 must be connected to PIN3 of X PORT
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7. • RS – Reset
• RW – Rewrite
• E – Enable
• D3 …. D7 – Data Line
• Anode - +5V
• Cathode - GND
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17. • #define LCD_DATA C //Port PC0-PC3 are connected to D4-D7
• #define LCD_E C //Enable signal
• #define LCD_E_POS PC5 //Position of enable in above port
• #define LCD_RS C
• #define LCD_RS_POS PC7
• #define LCD_RW C
• #define LCD_RW_POS PC6
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18. INITIALIZING LCD
InitLCD(LS_BLINK); //initialize LCD
• Above command will initialize the LCD
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19. CLEAR LCD
LCDClear(); // To clear the display
• Above command will CLEAR the LCD
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20. DISPLAY TEXT ON LCD
LCDWriteStringXY(X,Y,“Message");
• Above command Write the text on LCD
• X,Y are coordinates
• X = 0 …. 15
• Y = 0 and 1
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21. DISPLAY VARIABLE ON LCD
LCDWriteInt(X,Y,variable,field length);
• Above command Write the variable on LCD
• X,Y define position of coordinates
• X = 0 …. 15
• Y = 0 and 1
• Variable = variable which we print
• Field length = Num of Decimal places
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22. DISPLAY VARIABLE ON LCD
LCDWriteInt(X,Y,variable,field length);
• Above command Write the variable on LCD
• X,Y define position of coordinates
• X = 0 …. 15
• Y = 0 and 1
• Variable = variable which we print
• Field length = Num of Decimal places
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23. In case of queries please write us-
info@roboindia.com
www.roboindia.com
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