view code_part1/OSTC_code_asm_part1/spbrgselect.inc @ 842:454ef5c2e6aa default tip

Bugfix: Auto-SP did not show >9m for some 2C hardware versions in German language firmware Make year settings until 2040 possible (This is likely the final release for this model)
author heinrichsweikamp
date Sat, 29 Nov 2025 14:11:07 +0100
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