PICBASIC PLUS LITE Manual - Profe Saul

PICBASIC PLUS CompilerDECLARE LCD_RWPIN PORT . PINAssigns the Port and Pin that the graphic LCD’s RW line will attach to.If the DECLARE is not used in the program, then the default Port andPin is PortE.0.DECLARE LCD_CS1PIN PORT . PINAssigns the Port and Pin that the graphic LCD’s CS1 line will attachto.If the DECLARE is not used in the program, then the default Port andPin is PortC.0.DECLARE LCD_CS2PIN PORT . PINAssigns the Port and Pin that the graphic LCD’s CS2 line will attachto.If the DECLARE is not used in the program, then the default Port andPin is PortC.2.Note :Along with the new declares, two of the existing LCD declares mustalso be used. Namely, RS_PIN and EN_PIN.DECLARE INTERNAL_FONT ON - OFF, 1 or 0The graphic LCDs that are compatible with PICBASIC PLUS are nonintelligenttypes, therefore, a separate character set is required. Thismay be in one of two places, either externally, in an I 2 C eeprom, or internallyin a CDATA table.If the DECLARE is omitted from the program, then an external font isthe default setting.If an external font is chosen, the I 2 C eeprom must be connected to thespecified SDA and SCL pins (as dictated by DECLARE SDA and DE-CLARE SCL).If an internal font is chosen, it must be on a PIC device that has selfmodifying code features, such as the 16F87X range.The CDATA table that contains the font must have a label, namedFONT: preceding it. For example: -FONT:- { data for characters 0 to 64 }CDATA $7E , $11 , $11 , $11 , $7E , $0CDATA $7F , $49 , $49 , $49 , $36 , $0{ rest of font table }‘ Chr 65 “A”‘ Chr 66 “B”97Copyright Crownhill 2001