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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
2 digit Hex to Binary 8 bits
Author: paulsworkTakeThisOuT
This code was originally located @ http://www.piclist.com
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;**********************************************************************
; Routine:ASCIItoBIN
; Input Registers:ASCII_MSW, ASCII_LSW
; Output Registers: BUFFER
; Internal Registers:None
; CALLS:None
; Function: Receives two ASCII bytes in ASCII_MSW and ASCII_LSW registers.
; These two bytes are converted into 1 byte binary, returned from this
; routine in register BUFFER
;**********************************************************************
ASCIItoBIN MOVLW 65 ;convert ascii into MSW address
SUBWF ASCII_MSW,W
MOVLW 48
BTFSC StatusREG,C
MOVLW 55
SUBWF ASCII_MSW,W
ANDLW b'00001111'
MOVWF BUFFER ;Save result of the upper nibble
SWAPF BUFFER,1
MOVLW 65 ;convert ascii into LSW address
SUBWF ASCII_LSW,W
MOVLW 48
BTFSC StatusREG,C
MOVLW 55
SUBWF ASCII_LSW,W
ANDLW b'00001111' ;Get result of lower nibble
IORWF BUFFER,1 ;and put final result in BUFFER for output
retlw 0 |
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