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Minor documentation update

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Gregory Nutt 2014-08-08 11:29:17 -06:00
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Documentation/NuttxPortingGuide.html
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@ -2505,7 +2505,10 @@ config ARCH_SIM
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<p>
In addition, the RTOS will export the following interfaces for use by the platform-specific interval timer implementation:
Note that a platform-specific implementation would probably require two hardware timers: (1) A interval timer to satisfy the requirements of <a href="#uptimerstart"><code>up_timer_start()</code></a> and <a href="#uptimercancel"><code>up_timer_cancel()</code></a>, and a (2) a counter to handle the requirement of <a href="#uptimergettime"><code>up_timer_gettime()</code></a>. Ideally, both timers would run at the rate determined by <code>CONFIG_USEC_PER_TICK</code> (and certainly never slower than that rate).
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<p>
In addition to these imported interfaces, the RTOS will export the following interfaces for use by the platform-specific interval timer implementation:
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