Mercurial > public > mk2

view code_part1/OSTC_code_asm_part1/spbrgselect.inc @ 174:53b16a746166

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
Multi-lang + Move texts to single compact table. + Place at address 0x15000, reserved up to 0x17AFF (10kB) + Generate the english_test.asm reference (4kB) + Move altimeter texts into the table.
author JeanDo
date Thu, 03 Feb 2011 04:09:21 +0100
parents 96a35aeda5f2
children
line wrap: on
line source

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