nuttx

History

Xiang Xiao a9d7a776c4 sched: Remove SDCLONE_DISABLE option and config since the related code was removed by: commit `4d5a964f29` Author: Jiuzhu Dong <dongjiuzhu1@xiaomi.com> Date: Tue Feb 23 18:04:13 2021 +0800 net: unify socket into file descriptor Signed-off-by: Xiang Xiao <xiaoxiang@xiaomi.com>		2022-01-31 19:03:20 +01:00
..
configs/nsh	sched: Remove SDCLONE_DISABLE option and config	2022-01-31 19:03:20 +01:00
include	boards: arm: Author Masayuki Ishikawa: Update license to Apache	2021-03-14 22:23:05 -07:00
scripts	board: Remove -fno-strength-reduce	2022-01-19 00:14:03 +01:00
src	Rename CONFIG_LIB_BOARDCTL to CONFIG_BOARDCTL	2021-08-06 13:58:26 +02:00
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.