nuttx

History

Xiang Xiao b0797263ca libc/stdio: Allocate file_struct dynamically 1.Reduce the default size of task_group_s(~512B each task) 2.Scale better between simple and complex application Signed-off-by: Xiang Xiao <xiaoxiang@xiaomi.com> Change-Id: Ia872137504fddcf64d89c48d6f0593d76d582710		2020-09-11 17:58:17 +08:00
..
configs/nsh	libc/stdio: Allocate file_struct dynamically	2020-09-11 17:58:17 +08:00
include	Merged in alinjerpelea/nuttx (pull request #996 )	2019-08-15 16:19:17 +00:00
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.