mmm....well my circuit finally completely works...ive got the 8 data pins on the 25-pin connector wired up to the 8 pins of the LCD im using....ive got the 25th pin (which is grounde) wired up to the cathode pin on the LCD....now when I plug it in to the parallel port, they all immediately light up....
I thought by using this code, I'd be sending the hex value of 28 to the LCD...the hex value of 28 in binary is of course: 00101000. I figure this would go like thisCode:outportb(0x378,0x28);
(that's not really code, just what would get sent to each pin I think). A 1 would supply the current to light up that part of the LCD, and the 0's would do nothing.Code:2^0 - 1st Data Pin - 0 2^1 - 2nd Data Pin - 0 2^2 - 3rd Data Pin - 0 2^3 - 4th Data Pin - 1 2^4 - 5th Data Pin - 0 2^6 - 6th Data Pin - 1 2^7 - 7th Data Pin - 0 2^8 - 8th Data Pin - 0
Anyone know why it's already lighting up? Am I using the outportb(0x378,0x28) command right....will that do what I think it is?
Also could the problem be the cable I'm using? I think it's an odd one....it's a 25 pin Male/Male but it says Direct Cable Connection (PC-to-PC File Transfer) ....on the back it says it CAN'T be used with switchboxes...it's only made for PC-PC file transfer..should this cable work, or is this the possible cause of my problem? Thanks.