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int rn_dispClear(int handle, int reserved);
Clears the display and homes cursor to the upper left corner of the display. This function will wait
approximately 3 ms for the display to settle.
PARAMETERS
handle is an address index to device information. Use rn_device() or rn_find() to estab-
lish the handle.
reserved is reserved for future use. Set to 0.
RETURN VALUE
The status byte from the previous command. -1 means that device information indicates the Keypad/Dis-
play interface is not connected to the master.
SEE ALSO
rn_dispOnoff, rn_dispGoto, rn_dispCursor
int rn_dispGoto(int handle, unsigned wX,
unsigned wY, int reserved);
Positions the cursor.
PARAMETERS
handle is an address index to device information. Use rn_device() or rn_find() to estab-
lish the handle.
wX is the column position—the typical range is 0 to 19, and depends on the actual display type you are
using.
wY is the row position—the typical range is 0 to 3, and depends on the actual display type you are using.
reserved is reserved for future use. Set to 0.
RETURN VALUE
The status byte from the previous command. -1 means that device information indicates the Keypad/Dis-
play interface is not connected to the master. -2 means that the row or column position is not valid.
SEE ALSO
rn_dispClear, rn_dispCursor
User ’s Manual
137
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