Note Driver Interface

Note driver is the interface to access the instrumentation data. The following devices are provided.

• notectl
• noteram

Notectl Device (/dev/notectl)

/dev/notectl is the device to control an instrumentation filter in NuttX kernel. The device has only ioctl function to control the filter.

/dev/notectl Header Files

The header file include/nuttx/note/notectl_driver.h provides the interface definitions of the device.

/dev/notectl Data Structures

/dev/notectl Ioctls

Noteram Device (/dev/note)

/dev/note is the device to get the trace (instrumentation) data. The device has read function to get the data and ioctl function to control the buffer mode.

/dev/note Header Files

The header file include/nuttx/note/noteram_driver.h provides the interface definitions of the device.

/dev/note Data Structures

/dev/note Ioctls

Filter control APIs

The following APIs are the functions to control note filters directly. These are kernel APIs and application can use them only in FLAT build.

The header file include/nuttx/sched_note.h is needed to use the following APIs.

API description