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barcode.txt

Associated article: Tight Code

Tags: Tools     Open Source     Mobile     Embedded Systems     Design    

Published source code accompanying the article by Ed Nisley in which he presents the software and schematics to build a bar code readers. Also see BARCODE.TXT.

					Embedded Space
by Ed Nisley

Listing One

Wait1ms:
           PUSH   ACC          ; 2 cycles
           MOV    A,#200       ; 1 cycle
           NOP                 ; 1 cycle

W1_1:      DJNZ   ACC,W1_1     ; 400 cycles
W1_2:      DJNZ   ACC,W1_2     ; 512 cycles

           POP    ACC          ; 2 cycles
           RET                 ; 2 + 2 for CALL
Listing Two 

WaitBar:
           CLR     BusyOut     ; show we're ...
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