nuttx

History

Xiang Xiao b329e2377d boards: Move toolchain related variables to Toolchain.defs 1.It make sense to let Toolchain.defs give the default value 2.The board can still change if the default isn't suitable 3.Avoid the same definition spread more than 200 Make.defs Signed-off-by: Xiang Xiao <xiaoxiang@xiaomi.com> Change-Id: Ic2649f1c7689bcf59c105ca8db61cad45b6e0e64		2020-07-20 17:10:37 +01:00
..
configs/nsh
include
scripts	boards: Move toolchain related variables to Toolchain.defs	2020-07-20 17:10:37 +01:00
src	build: Remove the empty variable assignment	2020-05-24 08:24:13 -06:00
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.