Mercurial > public > mk2
view code_part1/OSTC_code_asm_part1/spbrgselect.inc @ 355:f49d6f0fc870
Allow negatif CF:
* CF reset table encodes signed -128/+127 values. Upates CF48.
* Display & check signed min/max bounds in cf menu.
* Adapt CF alarm for signed values.
author | JeanDo |
---|---|
date | Tue, 07 Jun 2011 03:55:30 +0200 |
parents | 96a35aeda5f2 |
children |
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RoundResult SET 0 ; Rounding function. RoundResult = Round(aa/bb) Round macro aa,bb LOCAL rr = aa/bb LOCAL d1 = aa - rr*bb LOCAL d2 = (rr+1)*bb - aa RoundResult = rr if d1 >= d2 RoundResult++ endif endm AbsResult SET 0 Abs macro nr if nr>=0 AbsResult = nr else AbsResult = -nr endif endm Round xtal,(16*baud) spbrg_value EQU RoundResult-1 Round xtal,(16*(spbrg_value+1)) baud_real EQU RoundResult Abs(baud_real-baud) errpercent EQU AbsResult*100/baud if errpercent > 4 ERROR big error in baudrate: #v(errpercent)% endif if errpercent >= 2 messg baudrate not exact: #v(errpercent)% endif