nuttx

History

Gregory Nutt c428661e18 apps/examples/usbterm is gone because it can be configured to perform an illegal call into the OS. Remove all traces of CONFIG_EXAMPLES_USBTERM* and all of the illegal device support.		2017-03-09 15:39:28 -06:00
..
include
nsh	apps/examples/usbterm is gone because it can be configured to perform an illegal call into the OS. Remove all traces of CONFIG_EXAMPLES_USBTERM* and all of the illegal device support.	2017-03-09 15:39:28 -06:00
scripts
src
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.