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annotate src/wait.asm @ 609:6341f6663579

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author heinrichsweikamp
date Wed, 09 Jan 2019 15:13:36 +0100
parents ca4556fb60b9
children c40025d8e750
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1 ;=============================================================================
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2 ;
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3 ; File wait.asm V2.98c
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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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14 #include "hwos.inc"
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15
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16 wait CODE
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17
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18
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19 ; ==========================================================
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20 ; WAIT 1 second (Warning: Do not use for time critical routines. Can be between 0 and 1 sec!)
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21 ; ==========================================================
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22 global wait_1s
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23 wait_1s:
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24 ; Wait until "next second" flag is set
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25 bcf onesecupdate
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26 btfss onesecupdate
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27 bra $-2
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28 return
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29
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31 ; =============================================================================
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32 ; WAIT 1 MILLISECOND (Not exact: 1,008ms +/- 30,5µs + worst case ISR latency)
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33 ; =============================================================================
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34
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35 global WAITMSX
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36 WAITMSX:
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37 movwf wait_counter
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38 WAITMSX2:
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39 setf TMR5H
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40 movlw .255-.32 ; 32 x 31,5µs = 1,008ms
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41 movwf TMR5L
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42 bcf PIR5,TMR5IF ; clear flag
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43 WAITMSX3:
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44 btfss PIR5,TMR5IF
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45 bra WAITMSX3 ; wait loop
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46 decfsz wait_counter,F
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47 bra WAITMSX2
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48 return
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49
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50 ;=============================================================================
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51
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52 END