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Parallel Printer interfacing !!
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temtronic



Joined: 01 Jul 2010
Posts: 9269
Location: Greensville,Ontario

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PostPosted: Fri Jan 09, 2015 6:30 am     Reply with quote
re: crystal value
That PIC needs a real crystal (and 2 caps) to use as it's 'master clock'. Common values used are 4, 16 and 20 MHz. For fast serial ports like 115k200 you need a 20MHz crystal, slow like 2400 a 4 MHz will do. The faster the clock the more instructions the PIC can do in a second. The compiler will 'do the math' to get the correct UART timing.

re: control signals
Get the instruction manual for the printer to see IF you need those lines connected. Some do, some don't, we can't tell without more information. Sometimes you can connect them together and the printer works fine.

hth
jay
th3gr8



Joined: 16 Jul 2013
Posts: 12
Location: Pakistan

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PostPosted: Fri Jan 09, 2015 9:29 am     Reply with quote
temtronic wrote:
re: crystal value
That PIC needs a real crystal (and 2 caps) to use as it's 'master clock'. Common values used are 4, 16 and 20 MHz. For fast serial ports like 115k200 you need a 20MHz crystal, slow like 2400 a 4 MHz will do. The faster the clock the more instructions the PIC can do in a second. The compiler will 'do the math' to get the correct UART timing.

re: control signals
Get the instruction manual for the printer to see IF you need those lines connected. Some do, some don't, we can't tell without more information. Sometimes you can connect them together and the printer works fine.
hth
jay


I want to use Black Copper BC-85AC .. I dont find any info of this on the internet, except the info on this page :( ..
http://www.mbcommunication.com.pk/pakistan-thermal-printers/891-black-copper-turbo-thermal-printer-bc-85ac
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