http://www.piclist.com/techref/microchip/math/radix/index.htm Modified by:JMN-EFP-786 jamesnewton@efplus.com preview-to: http://www.piclist.com/techref/microchip/math/radix/b2b-4b2d-ba.htm 4bit to BCD 2 digits from Bob Ammerman http://www.piclist.com/techref/microchip/math/radix/b2b-4b2d-ba.htm Modified by:JMN-EFP-786 replace-to: 4bit to BCD 2 digits from Bob Ammerman

4bit to BCD 2 digits

from Bob Ammerman

WARNING: Untested code

Input:

W is a binary number in the range 0..29

Output:

W is a BCD number in the range 0x00..0x29

; W is 0..29

    addlw    .256-.20        ; C will be set if number was >= 20
    skpnc
    addlw    .6                   ; ...adjust for 20..29
    addlw    -(.256-.20)    ; Back to original value

    addlw    .256-.10       ; C will be set if number was >= 10
    skpnc
    addlw    .6                  ; ...adjust for 10..29
    addlw    -(.256-.10)   ; Back to original value

http://www.piclist.com/techref/microchip/math/radix/b2b-4b2d-ba.htm Modified by:JMN-EFP-786 replace-to: PIC Microcontroller Radix Math Method - 4bit to BCD 2

PIC Microcontoller Radix Math Method

4bit to BCD 2 digits

from Bob Ammerman

WARNING: Untested code

Input:

W is a binary number in the range 0..29

Output:

W is a BCD number in the range 0x00..0x29

; W is 0..29

    addlw    .256-.20        ; C will be set if number was >= 20
    skpnc
    addlw    .6                   ; ...adjust for 20..29
    addlw    -(.256-.20)    ; Back to original value

    addlw    .256-.10       ; C will be set if number was >= 10
    skpnc
    addlw    .6                  ; ...adjust for 10..29
    addlw    -(.256-.10)   ; Back to original value

http://www.piclist.com/techref/microchip/math/radix/index.htm Modified by:JMN-EFP-786 replace-to: PIC Microcontoller Radix Math Methods

PIC Microcontoller 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 Decimal to Binary 8 bits from Scott Dattalo and Dmitry Kiryashov
BCD
- 4bit to BCD 2 digits from Bob Ammerman
- packed to binary 2 digit to 8 bit from Scott Dattalo
- Packed BCD to 16 bit binary conversion by Nikolai Golovchenko
- half-packed to ASCII decimal 3 digit to 8 bit from Scott Dattalo
- unpacked to binary 2 digit to 8 bit from Mike Keitz
- Unpacked BCD to 16 bit binary conversion by Tony Kübek
- Unpacked BCD to 16 bit binary conversion by Nikolai Golovchenko
- RTC formats by Drew Vassallo
Binary
- to BCD
  - 8bit to BCD half-packed (3 digits) from Scott Dattalo
  - 16bit to BCD unpacked 5 digit 50 inst, ~200 executed 5 output registers from John Payson
  - 24bit to BCD 8 digits by Oliver Broad
  - 32bit to BCD packed and ASCII 10 digits from Ron Kreymborg and Mike Keitz
- to ASCII
  - 4bit to ASCII HEX 2 digits by Scott Dattalo
  - 8bit to ASCII HEX 2 digits by Scott Dattalo
  - 16bit to ASCII Decimal 5 digits with leading zero suppression and fixed decimal point from Dontronics and Scott Edwards
  - 16bit to ASCII Decimal 5 digits in 1 temp register, 76 instructions, ~500 executed by James Newton (Parallax menomics see Macros for using Parallax instructions with MPASM also Prlx.asm)
  - 16bit to ASCII Decimal 5 digits in 0 temp registers, 42 instructions, ~266 executed by Rich Leggit tweaked by Scott Dattalo.and bugfix by Dmitry Kiryashov and Nikolai Golovchenko
  - 16bit to ASCII Decimal 5 digits in 0 temp registers, 68 instructions, ~220 executed by Nikolai Golovchenko
  - 16bit to ASCII Decimal 3 digits (999) in 0 temp registers, 34 instructions, ~87 executed by Nikolai Golovchenko
  - 16bit to ASCII Decimal 3 digits (999) in 0 temp registers, 59 instructions, ~60 executed by Nikolai Golovchenko
  - 24bit signed to ASCII Decimal 8/9 digit decimal with point and minus sign (if negative) by Tony Kübek
  - 32bit to BCD packed and ASCII Decimal 10 digits from Ron Kreymborg and Mike Keitz

Conditionally replaceing one value with another

PIC Microcontoller 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 Decimal to Binary 8 bits from Scott Dattalo and Dmitry Kiryashov
BCD
- packed to binary 2 digit to 8 bit from Scott Dattalo
- Packed BCD to 16 bit binary conversion by Nikolai Golovchenko
- half-packed to ASCII decimal 3 digit to 8 bit from Scott Dattalo
- unpacked to binary 2 digit to 8 bit from Mike Keitz
- Unpacked BCD to 16 bit binary conversion by Tony Kübek
- Unpacked BCD to 16 bit binary conversion by Nikolai Golovchenko
- RTC formats by Drew Vassallo
Binary
- to BCD
  - 4bit to BCD 2 digits from Bob Ammerman
  - 8bit to BCD half-packed (3 digits) from Scott Dattalo
  - 16bit to BCD unpacked 5 digit 50 inst, ~200 executed 5 output registers from John Payson
  - 24bit to BCD 8 digits by Oliver Broad
  - 32bit to BCD packed and ASCII 10 digits from Ron Kreymborg and Mike Keitz
- to ASCII
  - 4bit to ASCII HEX 2 digits by Scott Dattalo
  - 8bit to ASCII HEX 2 digits by Scott Dattalo
  - 16bit to ASCII Decimal 5 digits with leading zero suppression and fixed decimal point from Dontronics and Scott Edwards
  - 16bit to ASCII Decimal 5 digits in 1 temp register, 76 instructions, ~500 executed by James Newton (Parallax menomics see Macros for using Parallax instructions with MPASM also Prlx.asm)
  - 16bit to ASCII Decimal 5 digits in 0 temp registers, 42 instructions, ~266 executed by Rich Leggit tweaked by Scott Dattalo.and bugfix by Dmitry Kiryashov and Nikolai Golovchenko
  - 16bit to ASCII Decimal 5 digits in 0 temp registers, 68 instructions, ~220 executed by Nikolai Golovchenko
  - 16bit to ASCII Decimal 3 digits (999) in 0 temp registers, 34 instructions, ~87 executed by Nikolai Golovchenko
  - 16bit to ASCII Decimal 3 digits (999) in 0 temp registers, 59 instructions, ~60 executed by Nikolai Golovchenko
  - 24bit signed to ASCII Decimal 8/9 digit decimal with point and minus sign (if negative) by Tony Kübek
  - 32bit to BCD packed and ASCII Decimal 10 digits from Ron Kreymborg and Mike Keitz