diff options
| author | Gregory Nutt <gnutt@nuttx.org> | 2014-08-11 14:29:43 -0600 |
|---|---|---|
| committer | Gregory Nutt <gnutt@nuttx.org> | 2014-08-11 14:29:43 -0600 |
| commit | c3d48a6b4f7b1b340876d4460a77e58e3fa5e5c5 (patch) | |
| tree | 34548c82d1e28ee44f0738985eef5ad5494dc748 /nuttx/configs/sama5d4-ek/README.txt | |
| parent | 65a029c74614adbfaba41ef0192c7e03d993ff30 (diff) | |
| download | px4-nuttx-c3d48a6b4f7b1b340876d4460a77e58e3fa5e5c5.tar.gz px4-nuttx-c3d48a6b4f7b1b340876d4460a77e58e3fa5e5c5.tar.bz2 px4-nuttx-c3d48a6b4f7b1b340876d4460a77e58e3fa5e5c5.zip | |
SAMA5: Enable the 32.768 crystal if SCHED_TICKLESS is selected
Diffstat (limited to 'nuttx/configs/sama5d4-ek/README.txt')
| -rw-r--r-- | nuttx/configs/sama5d4-ek/README.txt | 9 |
1 files changed, 8 insertions, 1 deletions
diff --git a/nuttx/configs/sama5d4-ek/README.txt b/nuttx/configs/sama5d4-ek/README.txt index 07d9036ba..2ee7d8b7b 100644 --- a/nuttx/configs/sama5d4-ek/README.txt +++ b/nuttx/configs/sama5d4-ek/README.txt @@ -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 ----------------- |