nuttx

History

Alan Rosenthal 8defb843aa Remove duplicate linker script definitions ## Summary A lot of linker scripts were listed twice, once for unix, once for windows. This PR cleans up the logic so they're only listed once. ## Impact Any opportunity to use a single source of truth and reduce lines of code is a win! ## Testing CI will test all build		2022-02-17 02:55:25 +08:00
..
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	Remove duplicate linker script definitions	2022-02-17 02:55:25 +08:00
src	Rename CONFIG_LIB_BOARDCTL to CONFIG_BOARDCTL	2021-08-06 13:58:26 +02:00
Kconfig
README.txt

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.