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SAMA5: Enable the 32.768 crystal if SCHED_TICKLESS is selected

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Gregory Nutt
2014-08-11 14:29:43 -06:00
parent 6918c1a0f8
commit cff5132179
11 changed files with 58 additions and 11 deletions
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configs/sama5d4-ek/README.txt
+8 -1
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@@ -3172,7 +3172,14 @@ Tickless OS
NOTE: In most cases, the slow clock will be used as the timer/counter
input. You should enable the 32.768KHz crystal for the slow clock by
calling sam_sckc_enable(). Otherwise, you will be doing all system
timing using the RC clock!
timing using the RC clock! UPDATE: This will now be selected by default
when you configure for TICKLESS support.
UPDATE: As of this writing (2014-8-11), the Tickless support is
functional. However, the timing for all delays appears to be half the
duration that it should be. I don't see anything wrong with the setup
and I am suspecting that there may be something I don't understand about
the counting frequency.
SAMA5 Timer Usage
-----------------