VEX2 Functions Display

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Revision as of 11:27, 13 April 2012

Main → CORTEX → Functions and Variables → Display


For information about ROBOTC string, please see the article: Strings.

Some display functions offer a precision parameter, which pads the displayed number with either zeros or spaces, until the number of digits is equal to the precision value:

Precision value Description Example Output
-4 Pads the displayed number with zeros until the number of digits equals 4. 000#
00##
0###
####
0 No padding. ##
4 Pads the displayed number with spaces until the number of digits equals 4. _ _ _#
_ _##
_###
####

Note: Underscore ( _ ) character denotes a space.


Contents
Color Key
Function:
Variable:


clearLCDLine

void clearLCDLine(const int nLine)
(void) Clears the indicated line of the VEX LCD to blanks.
Parameter Explanation Data Type
nLine The line to clear. 0 is the top, 1 is the bottom. int 
clearLCDLine(1);  //Clears the second line of the LCD Screen (0 would be the first line)


displayLCDCenteredString

void displayLCDCenteredString(const int nLine, string sString)
(void) Clears the indicated line of the VEX LCD to blanks.
Parameter Explanation Data Type
nLine The line to display on. 0 is the top, 1 is the bottom. int
sString The string to display. string 
displayLCDCenteredString(0,"ROBOT123");  //Displays the string "ROBOTC123" to the center of line 0


displayLCDChar

void displayLCDChar(const int nLine, const int nPos, const int cChar)
(void) Clears the indicated line of the VEX LCD to blanks.
Parameter Explanation Data Type
nLine The line to display on. 0 is the top, 1 is the bottom. int
nPos The position on 'nLine' to display from. int
cChar The char to display. Can be an int or char. int 
displayLCDChar(0,0,'C');  //Displays the character 'C' at the first position on the first line.


displayLCDNumber

void displayLCDNumber(const int nLine, const int nPos, const int nValue, const int nPrecision = -1)
(void) Displays a number nValue on line nLine at position nPos.
Parameter Explanation Data Type
nLine The line to display on. 0 is the top, 1 is the bottom. int
nPos The position on 'nLine' to display from. int
nValue The number to display. int
nPrecision The precision of the number. -1 by default. int 
displayLCDNumber(0,0,331);  // displays the number 331 at the first position on the first line


displayLCDPos

void displayLCDPos(const int nLine, const int nPos)
(void) Sets the next display position on the VEX LCD.
Parameter Explanation Data Type
nLine The line to display on. 0 is the top, 1 is the bottom. int
nPos The position on 'nLine' to display from. int 
displayLCDPos(0,0);  // sets the next character position to the first character on line 1


displayLCDString

void displayLCDString(const int nLine, const int nPos, string sString)
(void) Displays a string sString on line nLine at position nPos.
Parameter Explanation Data Type
nLine The line to display on. 0 is the top, 1 is the bottom. int
nPos The position on 'nLine' to display from. int
sString The string to display. string 
displayLCDString(0,0,"ROBOTC");  // displays the string "ROBOTC" starting from the first position 
                                 // on the first line


displayNextLCDChar

void displayNextLCDChar(const int cChar)
(void) Displays a specific character on the VEX LCD.
Parameter Explanation Data Type
cChar The char to display. Can be an int or char. int 
displayLCDPos(1,5);       // sets the current LCD position to line 2, character 6
displayNextLCdChar('A');  // displays the character 'A' on line 2, character 6


displayNextLCDNumber

void displayNextLCDNumber(const int nValue, const int nPrecision = 0x40)
(void) Displays a integer number on the VEX LCD.
Parameter Explanation Data Type
nValue The number to display. int
nPrecision The precision of the number. 64 by default. int 
displayNextLCDNumber(2365);  // displays the number '2365' onto the LCD screen


displayNextLCDString

void displayNextLCDString(string sString)
(void) Displays a integer number on the VEX LCD.
Parameter Explanation Data Type
sString The string to display. string 
displayNextLCDString("ROBOT123");  // displays the string of text ROBOTC123 onto the LCD


setLCDPosition

void setLCDPosition(const int nLine, const int nPos)
(void) Sets the next display position on the VEX LCD.
Parameter Explanation Data Type
nLine The line to display on. 0 is the top, 1 is the bottom. int
nPos The position on 'nLine' to display from. int 
displayLCDPos(0,0);  //Sets the next character position to the first character on line 1


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