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avr: added a note about the wait macro.

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Martin Preuss
2023-04-22 16:37:37 +02:00
parent ad925c38ab
commit 4bf20fb032
1 changed files with 3 additions and 0 deletions
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3
avr/common/utils_wait.asm
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@@ -19,6 +19,9 @@
; ---------------------------------------------------------------------------
; Utils_WaitNanoSecs waittime_in_ns , cyles_already_used , waitcount_register
;
; Please note: times smaller than 5000 are unreliable on 1MHZ AtTiny84 (takes much longer
; than requested, probably due to the fact that one cpu instrction already takes 1us to 2us).
;
; cycles already used will be subtracted from the delay
; the waittime resolution is 1 cycle (delay from exact to +1 cycle)
; the maximum delay at 20MHz (50ns/clock) is 38350ns