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All about PIC microcontrollers

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
BCD half-packed to ASCII decimal 3 digit to 8 bit
Author: Scott Dattalo
This code was originally located @ http://www.piclist.com


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W_to_ascii:

movwf bin ;added

CLRF hundreds
SWAPF bin,W
ADDWF bin,W
ANDLW 00001111b
SKPNDC
ADDLW 0x16
SKPNDC
ADDLW 0x06
ADDLW 0x06
SKPDC
ADDLW -0x06

BTFSC bin,4
ADDLW 0x16 - 1 + 0x6
SKPDC
ADDLW -0x06

BTFSC bin,5
ADDLW 0x30

BTFSC bin,6
ADDLW 0x60

BTFSC bin,7
ADDLW 0x20

ADDLW 0x60
RLF hundreds,F
BTFSS hundreds,0
ADDLW -0x60

MOVWF tens_and_ones
BTFSC bin,7
INCF hundreds,F

;added (from here to bottom)
movf hundreds,w ;
addlw 0x30 ;convert to ascii
call send_lcd ;hundreds to LCD

swapf tens_and_ones,w ;
andlw 0x0f ;
addlw 0x30 ;always less than 0x0A
call send_lcd ;tens to LCD

movf tens_and_ones,w ;
andlw 0x0f ;
addlw 0x30 ;
call send_lcd ;ones to LCD

return ;

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