nuttx

History

Gregory Nutt 1620ff05f4 Remove all setenv.sh files.		2017-04-26 07:49:37 -06:00
..
include	Add support for the SAM5CMP-DB board	2016-12-04 07:06:17 -06:00
nsh	Remove all setenv.sh files.	2017-04-26 07:49:37 -06:00
scripts	Add support for the SAM5CMP-DB board	2016-12-04 07:06:17 -06:00
src	SAM4CMP-DB: Add hooks to auto-mount the procfs file system on startup in board bring-up logic.	2016-12-05 11:58:58 -06:00
Kconfig	Add support for the SAM5CMP-DB board	2016-12-04 07:06:17 -06:00
README.txt	Add support for the SAM5CMP-DB board	2016-12-04 07:06:17 -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.