This sample is a starting point for working with the rBPF system on Sming.

See rBPF Femto-Container support for toolchain setup.

The sample contains three functions:

  • increment() simply adds 1 to the parameter value and returns it.

  • multiply() instead stores the output value in the context parameters.

  • store() demonstrates parameter passing using the stores.

The source code for these can be found in the container subdirectory. Each file contains a single function which is compiled into eRBF code for execution by the virtual machine.

Build the sample like any regular Sming application by running make. You can try it out without any hardware using the Host Emulator:

make SMING_ARCH=Host
make run

You should see this:

All up, running the Femto-Container application now
Calling 'increment()' in VM
input 0, result 1, expected 1
Calling 'multiply()' in VM
input (120000005, 120000023), output 14400003360000115, expected 14400003360000115, result 0
Calling 'store()' in VM
output (1001234, 2005678), result (1234, 5678)

Note that if a runtime error occurs then an appropriate error message is displayed.


SoC support

  • esp32

  • esp32c2

  • esp32c3

  • esp32s2

  • esp32s3

  • esp8266

  • host

  • rp2040