LCD Theory and Working Principles
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The document provides technical information about using a 16x2 liquid crystal display (LCD) with specific connections and commands for displaying text and variables. It details pin connections for control signals and data lines, along with example commands for initializing, clearing, and writing to the LCD. Additional resources and contact information for queries are also included.
LCD Theory and Working Principles
- 1. • LCD - Liquid Crystal Display • Mostly used for Display of Message • Highly user interactive Robo India http://roboindia.com
- 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 Click here to visit -ROBO INDIA
- 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 Click here to visit -ROBO INDIA
- 7. • RS – Reset • RW – Rewrite • E – Enable • D3 …. D7 – Data Line • Anode - +5V • Cathode - GND Click here to visit -ROBO INDIA
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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 Click here to visit -ROBO INDIA
- 18. INITIALIZING LCD InitLCD(LS_BLINK); //initialize LCD • Above command will initialize the LCD Click here to visit -ROBO INDIA
- 19. CLEAR LCD LCDClear(); // To clear the display • Above command will CLEAR the LCD Click here to visit -ROBO INDIA
- 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 Click here to visit -ROBO INDIA
- 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 Click here to visit -ROBO INDIA
- 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 Click here to visit -ROBO INDIA
- 23. In case of queries please write us- [email protected] www.roboindia.com Click here to visit -ROBO INDIA