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| author | Gregory Nutt <gnutt@nuttx.org> | 2014-08-08 11:29:17 -0600 |
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| committer | Gregory Nutt <gnutt@nuttx.org> | 2014-08-08 11:29:17 -0600 |
| commit | 6dfcaf2374c8e41e6c66aa1b32bb07b13daeba9b (patch) | |
| tree | dc69895a182157a97d847b2c5a267d0f886fbe9f | |
| parent | 5c1b623d1ece2edbc2654d02781007e0275ae968 (diff) | |
| download | nuttx-6dfcaf2374c8e41e6c66aa1b32bb07b13daeba9b.tar.gz nuttx-6dfcaf2374c8e41e6c66aa1b32bb07b13daeba9b.tar.bz2 nuttx-6dfcaf2374c8e41e6c66aa1b32bb07b13daeba9b.zip | |
Minor documentation update
| -rw-r--r-- | nuttx/Documentation/NuttxPortingGuide.html | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/nuttx/Documentation/NuttxPortingGuide.html b/nuttx/Documentation/NuttxPortingGuide.html index e603400e0..285bbac21 100644 --- a/nuttx/Documentation/NuttxPortingGuide.html +++ b/nuttx/Documentation/NuttxPortingGuide.html @@ -2505,7 +2505,10 @@ config ARCH_SIM </li> </ul> <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). +</p> +<p> + In addition to these imported interfaces, the RTOS will export the following interfaces for use by the platform-specific interval timer implementation: </p> <ul> <li> |