Yes! I know that parallel port connections are not suported but I was just playing a bit with the HD44780 based LCD while the 8051 is on his way...
Anyway.. the problem doesn't seem to be on the LCD or its wiring. I can send a few controls signals to the lcd by setting the right wires.
The problem seems to be with the LPT port and I thougth that maybe some one could help me.
It seems that the data pins DB0-DB4 on LPT are always on and DB5-DB7 are always off. I tried to use CFAH_WinTest: the signals E0, RS and RW I can sucessfully turn On and Off (measuring results with a multimeter). But with the Data Pins they always are Low or High as mencioned before?
Is it possible that I have fried my Parallel port? (Can't tell you how..) Any suggestion would be apreciated.
By the way:
I'm using Win98 in a P2XBL board.
Anyway.. the problem doesn't seem to be on the LCD or its wiring. I can send a few controls signals to the lcd by setting the right wires.
The problem seems to be with the LPT port and I thougth that maybe some one could help me.
It seems that the data pins DB0-DB4 on LPT are always on and DB5-DB7 are always off. I tried to use CFAH_WinTest: the signals E0, RS and RW I can sucessfully turn On and Off (measuring results with a multimeter). But with the Data Pins they always are Low or High as mencioned before?
Is it possible that I have fried my Parallel port? (Can't tell you how..) Any suggestion would be apreciated.
By the way:
I'm using Win98 in a P2XBL board.
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