[jira] [Created] (MYNEWT-329) Make hal cputime more efficient when 1 MHz clock or 32.768 kHz crystal is used.

["William San Filippo (JIRA)" <ji...@apache.org>]

William San Filippo created MYNEWT-329:
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             Summary: Make hal cputime more efficient when 1 MHz clock or 32.768 kHz crystal is used.
                 Key: MYNEWT-329
                 URL: https://issues.apache.org/jira/browse/MYNEWT-329
             Project: Mynewt
          Issue Type: Improvement
          Components: HAL, Nimble
    Affects Versions: v0_9_0
            Reporter: William San Filippo
            Assignee: William San Filippo
             Fix For: v0_10_0


We can make hal cputime be more efficient if we assume a 1 MHz or 32.768 kHz crystal as the timebase for hal cputime. Note that choosing these two values and not making other values generic seems reasonable as many low power timers are driven by 32.768 kHz crystals, and having a 1MHz clock for applications that dont care about power provides a fine enough resolution and makes converting from usecs to clock ticks simple.



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