from Daniel Serpell

; ======================================================== bin2ascii ; Input: reg. W ; Output: d2 / d1 / d0 (assumed in the same bank) ; Assumed "banksel d0" ; Used 40 instructions / 30-39 cycles (counting CALL/RETURN) ; average 34.77 cycles (from 0..255). clrf d2 clrf d1 ; Test if W is more than 199 (200 to 255) addlw .256 - .200 btfss STATUS,C goto digit100 bsf d2,1 ; Here we are in the 200 - 255 range, so it is possible to ; skip the .100 and .80 parts addlw .256 - .80 goto digit40 ; Now, we have a number from -200 to -1 (0..199), ; we add 100 to detect -100 to -1 (100..199). digit100 addlw .100 btfss STATUS,C goto $+3 bsf d2,0 addlw .256 - .100 ; Now, we have a number from -100 to -1 (0..99), ; we add 20 to detect -20 to -1 (80..99). addlw .20 btfss STATUS,C goto digit40 bsf d1,3 ; We skip the 4 and 2, as the largest value is 8 + 1 = 9. addlw .256 - .20 goto digit10 ; Now, we have a number from -80 to -1 (0..79), ; we add 40 to detect -40 to -1 (40..79). digit40 addlw .40 btfss STATUS,C goto $+3 bsf d1,2 addlw .256 - .40 ; Now, we have a number from -40 to -1 (0..39), ; we add 20 to detect -20 to -1 (20..39). addlw .20 btfss STATUS,C goto $+3 bsf d1,1 addlw .256 - .20 ; Now, we have a number from -20 to -1 (0..19), ; we add 10 to detect -10 to -1 (10..19). digit10 addlw .10 btfss STATUS,C goto $+3 bsf d1,0 addlw .256 - .10 ; Now, we have a number from -10 to -1 (0..9), ; we add 58 to bring it from 48 to 57 (0..9). addlw .58 movwf d0 movlw 0x30 xorwf d1,f xorwf d2,f return

Archive:

file: /Techref/microchip/math/radix/b2a-8b3d-ds.htm, 2KB, , updated: 2009/2/6 19:46, local time: 2024/7/13 19:29, |

©2024 These pages are served without commercial sponsorship. (No popup ads, etc...).Bandwidth abuse increases hosting cost forcing sponsorship or shutdown. This server aggressively defends against automated copying for any reason including offline viewing, duplication, etc... Please respect this requirement and DO NOT RIP THIS SITE. Questions?<A HREF="http://www.massmind.org/techref/microchip/math/radix/b2a-8b3d-ds.htm"> PIC Microcontoller Radix Math Method </A> |

Did you find what you needed? |

## Welcome to massmind.org! |

## Welcome to www.massmind.org! |

.