PIC Microcontoller Math Library Methods for Conversion of Millimeters to Inches

Conversion of Millimeters to Inches

To convert Millimeters to Inches, Divide by 25.4 or multiply by .03937.

For an eight bit value...

; ACC = ACC * 0.03937 ; Temp = TEMP ; ACC size = 8 bits ; Error = 0.5 % ; Bytes order = little endian ; Round = no ; ALGORITHM: ; Clear accumulator ; Add input / 32 to accumulator ; Add input / 128 to accumulator ; Add input / 4096 to accumulator ; Move accumulator to result ; ; Approximated constant: 0.0393066, Error: 0.160933 % ; Input: ACC0, 8 bits ; Output: ACC0, 4 bits ; Code size: 20 instructions cblock ACC0 TEMP0 endc ;copy accumulator to temporary movf ACC0, w movwf TEMP0 ;shift accumulator right 5 times swapf ACC0, w andlw 0x0F movwf ACC0 clrc rrf ACC0, f ;add temporary to accumulator movf TEMP0, w addwf ACC0, f ;shift accumulator right 2 times rrf ACC0, f clrc rrf ACC0, f ;add temporary to accumulator addwf ACC0, f ;shift accumulator right 5 times swapf ACC0, w andlw 0x0F movwf ACC0 skpnc bsf ACC0, 4 clrc rrf ACC0, f ; Generated by www.piclist.com/cgi-bin/constdivmul.exe (November 17, 2000 version) ; Tue Apr 03 14:37:32 2001 GMT

file: /Techref/microchip/math/convmilinch.htm, 1KB, , updated: 2001/4/3 08:39, local time: 2024/12/25 20:48,

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