Podcast
Questions and Answers
What is the primary function of an LCD display?
What is the primary function of an LCD display?
What is the maximum number of characters that can be displayed in a single line on an LCD display?
What is the maximum number of characters that can be displayed in a single line on an LCD display?
What is the purpose of the potentiometer in an LCD display?
What is the purpose of the potentiometer in an LCD display?
What is the minimum number of rows that can be displayed on an LCD display?
What is the minimum number of rows that can be displayed on an LCD display?
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What is the purpose of the _LCD_CLEAR command?
What is the purpose of the _LCD_CLEAR command?
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What is the purpose of the _LCD_SHIFT_LEFT command?
What is the purpose of the _LCD_SHIFT_LEFT command?
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What is the purpose of the Conversions Library?
What is the purpose of the Conversions Library?
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What is the timing requirement for sending data to the LCD?
What is the timing requirement for sending data to the LCD?
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What is the purpose of the FloatToStr function?
What is the purpose of the FloatToStr function?
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How many characters does the output string of the ByteToStr function have?
How many characters does the output string of the ByteToStr function have?
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What is the output string justification of the WordToStr function?
What is the output string justification of the WordToStr function?
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What is the minimum required length of the destination string for the FloatToStr function?
What is the minimum required length of the destination string for the FloatToStr function?
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What is the purpose of the Dec2Bcd function?
What is the purpose of the Dec2Bcd function?
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How many characters does the output string of the LongToStr function have?
How many characters does the output string of the LongToStr function have?
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What is the purpose of the IntToStr function?
What is the purpose of the IntToStr function?
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What is the output string justification of the FloatToStr function?
What is the output string justification of the FloatToStr function?
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Study Notes
LCD Display Features
- Can display messages in one, two, or four lines with 16 characters each
- Displays all letters of the alphabet, Greek letters, punctuation marks, mathematical symbols, and user-defined symbols
- Features include automatic message shift (left and right), cursor appearance, and LED backlight
- Display contrast depends on varying voltage (0-Vdd) applied to the VEE pin using a 5 kΩ potentiometer
Commands for LCD Display
- _LCD_FIRST_ROW: Move cursor to 1st row
- _LCD_SECOND_ROW: Move cursor to 2nd row
- _LCD_THIRD_ROW: Move cursor to 3rd row
- _LCD_FOURTH_ROW: Move cursor to 4th row
- _LCD_CLEAR: Clear display
- _LCD_RETURN_HOME: Return cursor to home position, returns a shifted display to original position
- _LCD_CURSOR_OFF: Turn off cursor
- _LCD_UNDERLINE_ON: Underline cursor on
- _LCD_BLINK_CURSOR_ON: Blink cursor on
- _LCD_MOVE_CURSOR_LEFT: Move cursor left without changing display data RAM
- _LCD_MOVE_CURSOR_RIGHT: Move cursor right without changing display data RAM
- _LCD_TURN_ON: Turn LCD display on
- _LCD_TURN_OFF: Turn LCD display off
- _LCD_SHIFT_LEFT: Shift display left without changing display data RAM
- _LCD_SHIFT_RIGHT: Shift display right without changing display data RAM
Conversions Library Routines
- Provides routines for numerals to strings and BCD/decimal conversions
- Functions include:
- ByteToStr: Converts input byte to a string
- ShortToStr: Converts input signed short number to a string
- WordToStr: Converts input word to a string
- IntToStr: Converts input signed integer number to a string
- LongToStr: Converts input signed long integer number to a string
- LongWordToStr: Converts input unsigned long integer number to a string
- FloatToStr: Converts input floating-point number to a string
- rtrim: Trims string
- Dec2Bcd: Converts decimal value to BCD
- Bcd2Dec16: Converts BCD to decimal
- Dec2Bcd16: Converts decimal value to 16-bit BCD
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Description
This quiz covers the characteristics and functions of a miniature LCD display, including its display capabilities, features, and technical aspects.
