Mercurial > public > hwos_code
view src/wait.asm @ 606:8b250afb8bdd
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| author | heinrichsweikamp |
|---|---|
| date | Sun, 25 Nov 2018 15:15:27 +0100 |
| parents | ca4556fb60b9 |
| children | c40025d8e750 |
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;============================================================================= ; ; File wait.asm V2.98c ; ; Wait routines ; ; Copyright (c) 2011, JD Gascuel, HeinrichsWeikamp, all right reserved. ;============================================================================= ; HISTORY ; 2004-01-31 : [chsw] initial version ; 2007-05-11 : updated (OSTC code) ; 2011-10-18 : [mH] timings tested with oscilloscope #include "hwos.inc" wait CODE ; ========================================================== ; WAIT 1 second (Warning: Do not use for time critical routines. Can be between 0 and 1 sec!) ; ========================================================== global wait_1s wait_1s: ; Wait until "next second" flag is set bcf onesecupdate btfss onesecupdate bra $-2 return ; ============================================================================= ; WAIT 1 MILLISECOND (Not exact: 1,008ms +/- 30,5µs + worst case ISR latency) ; ============================================================================= global WAITMSX WAITMSX: movwf wait_counter WAITMSX2: setf TMR5H movlw .255-.32 ; 32 x 31,5µs = 1,008ms movwf TMR5L bcf PIR5,TMR5IF ; clear flag WAITMSX3: btfss PIR5,TMR5IF bra WAITMSX3 ; wait loop decfsz wait_counter,F bra WAITMSX2 return ;============================================================================= END