nuttx

History

liuhaitao 459ad99373 Use EXTRAFLAGS instead of EXTRADEFINES to be used by make via command line So call 'make EXTRAFLAGS=-Wno-cpp' could suppress the warnings with pre-processor directive #warning in GCC. Change-Id: Iaa618238924c9969bf91db22117b39e6d2fc9bb6 Signed-off-by: liuhaitao <liuhaitao@xiaomi.com>		2020-04-11 08:31:08 -06:00
..
configs/nsh
include	Merged in alinjerpelea/nuttx (pull request #996 )	2019-08-15 16:19:17 +00:00
scripts	Use EXTRAFLAGS instead of EXTRADEFINES to be used by make via command line	2020-04-11 08:31:08 -06:00
src	Run codespell -w with the latest dictonary again	2020-02-23 22:27:46 +01:00
Kconfig
README.txt	Remove exra whitespace from files (#189 )	2020-01-31 09:24:49 -06:00

README.txt

README
^^^^^^

README for NuttX port to the SAM4CMP-DB board.

  http://www.atmel.com/tools/SAM4CMP-DB.aspx

The board is intended to test NuttX SMP features for dual Cortex-M4.


Settings
^^^^^^^^
1. Both CPUs are running at 92.160MHz with PLLB.
2. Serial console can be used via on-board USB-UART (115200/8/N/1)
3. Interrupt handlers such as timer and UART are handled on CPU0
4. Both CPUs share internal SRAM0 (128KB)
5. SRAM1 is used to boot CPU1.
6. Cache controllers are disabled because of no snooping features.

Status
^^^^^^
Currently SMP freature works on the board but is not stable.

1. "nsh> sleep 1 &" works without crash.
2. "nsh> smp " sometimes works but some assertions might happen.
3. "nsh> ostest " causes deadlocks during the test.