Hi all,
I have a strange problem and if any one have the solution or the idea to solve it
first I interface the barcode reader with PIC16f877a which when anyone pass its ID card it will display the number on the LCD without any problems and it's working alright.
second I interface my HP laseject printer with pic16f877a so I can print some information on printer and it's working alright without any problems.
Now I want to mix two steps since when anyone pass its ID card , the printer will automatically print the ID number.
I did first step and second step individual without any problems, but when i mix the two steps together in one file , the printer worked but the interrupt doesn't work since the number is not true.
I don't know why the interrupt is not woking properly
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