cb5bab34f1
Now we have CONFIG_USEC_PER_TICK, and for our timer system, all the calculation used 'tick'. And all the timespec should change to 'tick' before use wd_start(), so USEC2TICK() can NOT be avoided. Then there must be an 'less then one tick' loss. One resolution: ticks++ anyway when wd_start(). But this will caused time expired more a tick. Another resolution: Change the testcase, and allow the following logic: t1 = current_time(); sleep(3); t2 = current_time(); allow: t2 - t1 >= 3; (original test must be: t2- t1 > 3) The original test think the time must be elapse-ing, and the (t2 - t1) must bigger then 3, but in our system, we use 'tick' as the minimal wdog unit, then there must a precision loss. Now we choose first resolution. Signed-off-by: ligd <liguiding1@xiaomi.com> |
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arch | ||
audio | ||
binfmt | ||
boards | ||
cmake | ||
crypto | ||
Documentation | ||
drivers | ||
dummy | ||
fs | ||
graphics | ||
include | ||
libs | ||
mm | ||
net | ||
openamp | ||
pass1 | ||
sched | ||
syscall | ||
tools | ||
video | ||
wireless | ||
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AUTHORS | ||
CMakeLists.txt | ||
CONTRIBUTING.md | ||
INVIOLABLES.md | ||
Kconfig | ||
LICENSE | ||
Makefile | ||
NOTICE | ||
README.md | ||
ReleaseNotes |
Apache NuttX is a real-time operating system (RTOS) with an emphasis on standards compliance and small footprint. Scalable from 8-bit to 64-bit microcontroller environments, the primary governing standards in NuttX are POSIX and ANSI standards. Additional standard APIs from Unix and other common RTOSs (such as VxWorks) are adopted for functionality not available under these standards, or for functionality that is not appropriate for deeply-embedded environments (such as fork()).
For brevity, many parts of the documentation will refer to Apache NuttX as simply NuttX.
Getting Started
First time on NuttX? Read the Getting Started guide! If you don't have a board available, NuttX has its own simulator that you can run on terminal.
Documentation
You can find the current NuttX documentation on the Documentation Page.
Alternatively, you can build the documentation yourself by following the Documentation Build Instructions.
The old NuttX documentation is still available in the Apache wiki.
Supported Boards
NuttX supports a wide variety of platforms. See the full list on the Supported Platforms page.
Contributing
If you wish to contribute to the NuttX project, read the Contributing guidelines for information on Git usage, coding standard, workflow and the NuttX principles.
License
The code in this repository is under either the Apache 2 license, or a license compatible with the Apache 2 license. See the License Page for more information.