help!connect mcu to printer and print data on it directly

[alec82]

mcu with printer

hi friends
i want to connect mcu to printer and print data on it directly.
anybody can help me on this prototocol? how i can print text or print graphic into the printer via parallel port?
best regards.

 

[budhy]

Re: help!connect mcu to printer and print data on it directl

8051 MCU - Centronic Parallel Printer thru PC Parallel Port Cable connection:

Driver sub-routine:

ACK    bit P3.2
BUSY   bit P3.3
STROBE bit P3.4
Data   EQU P1
;
OutPrinter:
     MOV  Data,A ; place data
     JB   BUSY,$ ; waiting until not BUSY
     CLR  STROBE ; '0' a moment to create '0' pulse
     SETB STROBE ; back to '1'
     RET