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annotate src/wait.asm @ 432:929feb0da4f5

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hunting a bug in the logbook (Day 2)
author heinrichsweikamp
date Wed, 22 Jun 2016 12:36:15 +0200
parents 653a3ab08062
children b455b31ce022
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1 ;=============================================================================
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2 ;
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3 ; File wait.asm
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4 ;
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5 ; Wait routines
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6 ;
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7 ; Copyright (c) 2011, JD Gascuel, HeinrichsWeikamp, all right reserved.
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8 ;=============================================================================
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9 ; HISTORY
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10 ; 2004-01-31 : [chsw] Initial version.
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11 ; 2007-05-11 : Updated (OSTC code).
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12 ; 2011-10-18 : [mH] Timings tested with oscilloscope
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13
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653a3ab08062 rename into hwOS
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14 #include "hwos.inc"
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15
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16 basic CODE
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17
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18 ; ==========================================================
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19 ; WAIT 1 MILLISECOND (Not exact: 1,008ms +/- 30,5µs + worst case ISR latency)
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20 ; ==========================================================
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21
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22 global WAITMSX
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23 WAITMSX movwf waitms_temp
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24
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25 WAITMSX2 setf TMR5H
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26 movlw .255-.32 ;32 x 31,5µs = 1,008ms
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27 movwf TMR5L
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28 bcf PIR5,TMR5IF ; Clear flag
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29 WAITMSX3 btfss PIR5,TMR5IF
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30 bra WAITMSX3 ; Wait loop
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31 decfsz waitms_temp,F
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32 bra WAITMSX2
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33 return
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34
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35 ;=============================================================================
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36
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37 END