Post by thread:[PIC]: LCD with PIC

hi to all I'm connecting a lcd display thru parallel port. my problem is, the lcd's ASCII char table is shifted, I see English fine, but my country language chr's I see in "gibberish". I found that the manufacturer "shift" the chr's to other address. our alphabet char. start in ASCII 128 and finish on ASCII 154. the factory somehow program it to start from ASCII 160 to 186. can a PIC can solve it? is it possible to program a program that shift the chars when it "see" other ASCII's? I know it's a strange question, but maybe someone can help me.....:-( Thanks Tal -- http://www.piclist.com hint: PICList Posts must start with ONE topic: [PIC]:,[SX]:,[AVR]: ->uP ONLY! [EE]:,[OT]: ->Other [BUY]:,[AD]: ->Ads

Hi! > I'm connecting a lcd display thru parallel port. > my problem is, the lcd's ASCII char table is shifted, I see English fine, > but my country language chr's I see in "gibberish". > > I found that the manufacturer "shift" the chr's to other address. our > alphabet char. start in ASCII 128 and finish on ASCII 154. the factory > somehow program it to start from ASCII 160 to 186. You don't told us which kind of display and design of your "interface". So i think you speak about a 44780 compatible display with a zero part interface. (just connect to data and control lines) In this case your software do all the communication/protocol. I think the simple way to solve this is to exchange the char your pc will output befor it sends to the display. Try something like "if char>=ascii(160) and char<=ascii(186) then char=char - ascii(160-128)" (you have to adapt this to your programming language, of course) > can a PIC can solve it? Yes. But in this case i would prefer a serial communication between the PC and the PIC. The pic running a code that handles the serial link, char replacement and display communication. If you still want to use the parallel port of your pc, you can even use a eprom (with a map programmed in it) to replace chars (if you use 8Bit communication for the display). You can simply connect the 8 datalines from the PC to the Addresslines of the Eprom and the Datalines (of the EProm) to the Display. (Don't forget the RS line) > is it possible to program a program that shift the chars when it "see" other > ASCII's? There are probably 101 way's to solve this. ;-) cu, Christian -- http://www.piclist.com hint: PICList Posts must start with ONE topic: [PIC]:,[SX]:,[AVR]: ->uP ONLY! [EE]:,[OT]: ->Other [BUY]:,[AD]: ->Ads

Yes; just about any pic can easily do this. Just subtract 28 from the ascii that is sent from the parallelport and send the result to the LCD - easy ! The 'tricky' part might be to handle the handshaking if the display requires it. /PJ {Quote hidden}> I'm connecting a lcd display thru parallel port. > my problem is, the lcd's ASCII char table is shifted, I see English fine, > but my country language chr's I see in "gibberish". > > I found that the manufacturer "shift" the chr's to other address. our > alphabet char. start in ASCII 128 and finish on ASCII 154. the factory > somehow program it to start from ASCII 160 to 186. > > can a PIC can solve it? > is it possible to program a program that shift the chars when it "see" other > ASCII's? -- http://www.piclist.com hint: PICList Posts must start with ONE topic: [PIC]:,[SX]:,[AVR]: ->uP ONLY! [EE]:,[OT]: ->Other [BUY]:,[AD]: ->Ads

or "AND" it with 1101 1111 in the PC Justin -----Original Message----- From: Patrick J [spam_OUTinfoTakeThisOuTDATECH.SE] Sent: Thursday, 3 January 2002 07:50 To: .....PICLISTKILLspam@spam@MITVMA.MIT.EDU Subject: Re: [PIC]: LCD with PIC Yes; just about any pic can easily do this. Just subtract 28 from the ascii that is sent from the parallelport and send the result to the LCD - easy ! The 'tricky' part might be to handle the handshaking if the display requires it. /PJ > I'm connecting a lcd display thru parallel port. > my problem is, the lcd's ASCII char table is shifted, I see English fine, > but my country language chr's I see in "gibberish". > > I found that the manufacturer "shift" the chr's to other address. our > alphabet char. start in ASCII 128 and finish on ASCII 154. the factory > somehow program it to start from ASCII 160 to 186. > > can a PIC can solve it? > is it possible to program a program that shift the chars when it "see" other > ASCII's? -- http://www.piclist.com hint: PICList Posts must start with ONE topic: [PIC]:,[SX]:,[AVR]: ->uP ONLY! [EE]:,[OT]: ->Other [BUY]:,[AD]: ->Ads -- http://www.piclist.com hint: PICList Posts must start with ONE topic: [PIC]:,[SX]:,[AVR]: ->uP ONLY! [EE]:,[OT]: ->Other [BUY]:,[AD]: ->Ads