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Within these pages, you can find many useful pieces of code mostly in assembly for the Microchip PIC micro controller family. A lot of people have spend many hours trying to put the bits and bytes together. If the code is NOT written by a member of the PCB Heaven community, then a link will be added above the code with the original website that this code was found.
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View code
Binary 7bit to ASCII decimal 3 digits
Author: Bob Axtell
This code was originally located @ http://www.piclist.com
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; BINARY TO ASCII ROUTINES
; this is NOT the smallest converter but its the fastest...
;***************************************************************
; this table will convert 0 to 99 in binary to packed BCD
;***************************************************************
; binary to packed bcd 00-99 7 bits only jump table
bin2pak:
addwf PCL,f
retlw 0
retlw 1
retlw 2
retlw 3
retlw 4
retlw 5
retlw 6
retlw 7
retlw 8
retlw 9
retlw h'10'
retlw h'11'
retlw h'12'
retlw h'13'
retlw h'14'
retlw h'15'
retlw h'16'
retlw h'17'
retlw h'18'
retlw h'19'
retlw h'20'
retlw h'21'
retlw h'22'
retlw h'23'
retlw h'24'
retlw h'25'
retlw h'26'
retlw h'27'
retlw h'28'
retlw h'29'
retlw h'30'
retlw h'31'
retlw h'32'
retlw h'33'
retlw h'34'
retlw h'35'
retlw h'36'
retlw h'37'
retlw h'38'
retlw h'39'
retlw h'40'
retlw h'41'
retlw h'42'
retlw h'43'
retlw h'44'
retlw h'45'
retlw h'46'
retlw h'47'
retlw h'48'
retlw h'49'
retlw h'50'
retlw h'51'
retlw h'52'
retlw h'53'
retlw h'54'
retlw h'55'
retlw h'56'
retlw h'57'
retlw h'58'
retlw h'59'
retlw h'60'
retlw h'61'
retlw h'62'
retlw h'63'
retlw h'64'
retlw h'65'
retlw h'66'
retlw h'67'
retlw h'68'
retlw h'69'
retlw h'70'
retlw h'71'
retlw h'72'
retlw h'73'
retlw h'74'
retlw h'75'
retlw h'76'
retlw h'77'
retlw h'78'
retlw h'79'
retlw h'80'
retlw h'81'
retlw h'82'
retlw h'83'
retlw h'84'
retlw h'85'
retlw h'86'
retlw h'87'
retlw h'88'
retlw h'89'
retlw h'90'
retlw h'91'
retlw h'92'
retlw h'93'
retlw h'94'
retlw h'95'
retlw h'96'
retlw h'97'
retlw h'98'
retlw h'99'
;**************************************************************
; 7-BIT BINARY TO 3-BYTE ASCII
; Mostly used to make binary to ASCII for Displays
; Input in 7 bits
; Output in ASCII: tmp1 (1s), tmp2 (10s), tmp (100s)
;**************************************************************
bin2asc:
andlw h'7f' ;7 bits only
movwf tmp1
clrf tmp
addlw d'256'-d'100' ;2s compl
btfss status,c ;>99, subtract 100
goto bin2a
incf tmp,f ;above 99, indicate 100s
movwf tmp1
bin2a:
movf tmp1,w
call bin2pak ;bin to 2-packed bin 99 max
;
; exit here if all you need is packed BCD (h'00' to h'99')
;
movwf tmp1 ;remainder converts packed BCD to 3-ASCII
movwf tmp2
swapf tmp2,f
movlw b'1111'
andwf tmp1,f
andwf tmp2,f
movlw '0'
addwf tmp1,f ;1's done
addwf tmp2,f ;10's done
addwf tmp,f ;100's done
return
;***************************************************************** |
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