SX Microcontroller Radix Math Methods

• ASCII
  • 1 digit Hex to Binary 4 bits From Regulus Berdin, Tracy Smith
  • 2 digit Hex to Binary 8 bits from Andrew Warren
  • 2 digit Hex to Binary 8 bits with range checking by James Newton
  • 2 digit Decimal to Binary 8 bits from Scott Dattalo and Dmitry Kiryashov
• BCD
  • unpacked to binary 2 digit to 8 bit from Mike Keitz
  • packed to binary 2 digit to 8 bit from Scott Dattalo
  • half-packed to ASCII decimal 3 digit to 8 bit from Scott Dattalo
  • Unpacked BCD to 16 bit binary conversion by Nikolai Golovchenko
  • Packed BCD to 16 bit binary conversion by Nikolai Golovchenko
• Binary
  • 4 bit (and 8 bit) to ASCII Hex
  • 8bit to BCD packed 2 digits from Ken Mathis
  • 8bit to BCD half-packed (3 digits) from Scott Dattalo
  • 8bit to BCD unpacked 3 digits from Wunnerful1
  • 16bit to BCD unpacked 5 digit 50 inst, ~200 executed 5 output registers from John Payson
  • 32bit to BCD packed and ASCII 10 digits ~2200 executed from Ron Kreymborg and Mike Keitz
  • 16bit to ASCII 5 digits with leading zero suppression and fixed decimal point from Dontronics and Scott Edwards
  • 16bit to ASCII 5 digits in 1 temp register, 76 instructions, ~500 executed by James Newton
  • 16bit to ASCII 5 digits in 0 temp registers, 42 instructions, ~266 executed by Rich Leggit tweeked by Scott Dattalo.and bugfix by Dmitry Kiryashov and Nikolai Golovchenko
  • 16bit to ASCII 5 digits in 0 temp registers, 68 instructions, ~220 executed by Nikolai Golovchenko
  • 24bit signed to ASCII 8/9 digit decimal with point and minus sign (if negative) by Tony Kübek

Parsing the radix from "B" for binary, etc..

Radix Conversion Methods

See also:

• http://www.shm.monash.edu.au/~r.kreymborg/pic/dopic.cgix?ascii16
• http://www.shm.monash.edu.au/~r.kreymborg/code.html16 or 32 bit binary to ASCII

Archive:

• List post "32 Bit Binary to ASCII Routine..." James Newton of James Newton's Massmind replies: Source code at: http://forums.parallax.com/forums/default.aspx?f=7&p=1&m=308085 +

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• PICList post "Code Challenge: Range check and convert Hex to Binary" +

Code:

• ;Ken Mathis
  ;Purpose: Convert an 8 bit number to BCD
  ;so value can be sent to a 7447 seven segment display driver
  ;I/O pin hungry, requires 8 bits to send data out.
  ;temp1 holds binary value
  ;BCD result in temp1
  ;$32 (50 decimal) becomes or %01010000
  hex_to_bcd
  	clr		temp0	;clear register
  convert
  	inc		temp0	;increment number of 10’s
  	mov		w,#$0A	
  	sub		temp1,w	;subtract 10 from temp1
  	snc			;skip next instruction if underflow occurs
  	jmp		convert	;repeat
  	mov		w,#$A		
  	add		temp1,w	;restore temp1. number of 1’s after restored
  	dec		temp0	;correction to the number of 10’s
  	swap		temp0	;swap upper and lower nibble of temp0
  	add		temp1,temp0	;place number of 10’s in upper nibble of temp1
  	ret				;temp1 now hold BCD value of $32
  

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