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/sama5d3-xplained | |
| 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/sama5d3-xplained')
| -rw-r--r-- | nuttx/configs/sama5d3-xplained/Kconfig | 5 | ||||
| -rw-r--r-- | nuttx/configs/sama5d3-xplained/README.txt | 3 | ||||
| -rw-r--r-- | nuttx/configs/sama5d3-xplained/src/sam_boot.c | 7 |
3 files changed, 14 insertions, 1 deletions
diff --git a/nuttx/configs/sama5d3-xplained/Kconfig b/nuttx/configs/sama5d3-xplained/Kconfig index 27139b53e..25d97d6fb 100644 --- a/nuttx/configs/sama5d3-xplained/Kconfig +++ b/nuttx/configs/sama5d3-xplained/Kconfig @@ -20,6 +20,11 @@ config SAMA5D3XPLAINED_528MHZ endchoice # CPU Frequency +config SAMA5D3XPLAINED_SLOWCLOCK + bool + default y if SCHED_TICKLESS + default n if !SCHED_TICKLESS + choice prompt "SAMA5D3-Xplained DRAM Type" default SAMA5D3XPLAINED_MT47H128M16RT diff --git a/nuttx/configs/sama5d3-xplained/README.txt b/nuttx/configs/sama5d3-xplained/README.txt index c9d855141..85342306d 100644 --- a/nuttx/configs/sama5d3-xplained/README.txt +++ b/nuttx/configs/sama5d3-xplained/README.txt @@ -2392,7 +2392,8 @@ 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. SAMA5 Timer Usage ----------------- diff --git a/nuttx/configs/sama5d3-xplained/src/sam_boot.c b/nuttx/configs/sama5d3-xplained/src/sam_boot.c index fd651bf27..34d0a1593 100644 --- a/nuttx/configs/sama5d3-xplained/src/sam_boot.c +++ b/nuttx/configs/sama5d3-xplained/src/sam_boot.c @@ -41,6 +41,7 @@ #include <debug.h> +#include "sam_sckc.h" #include "sama5d3-xplained.h" /************************************************************************************ @@ -67,6 +68,12 @@ void sam_boardinitialize(void) { +#ifdef CONFIG_SAMA5D3XPLAINED_SLOWCLOCK + /* Enable the external slow clock */ + + sam_sckc_enable(true); +#endif + /* Configure SPI chip selects if 1) SPI is enable, and 2) the weak function * sam_spiinitialize() has been brought into the link. */ |