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here are a couple of BIN to ASCII converters I wrote, might be useful.;********************************************************************** ; 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
file: /Techref/microchip/math/radix/a2b-2d8b-pw.htm, 1KB, , updated: 2003/10/21 18:36, local time: 2024/8/15 00:04,
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Ashley Roll has put together a really nice little unit here. Leave off the MAX232 and keep these handy for the few times you need true RS232! |
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