hello-vpr

Smallest Contiki-NG on the nRF54L15 FLPR (RV32E coprocessor).

One process, etimer-driven LED blink (gpio2 pin 0, the XIAO nRF54L15 user LED, 1 Hz), tick counter written to a known shared SRAM address (0x2003F000) so the M33 can read it.

Builds for TARGET=nrf-vpr. The resulting .bin is the FLPR firmware blob the M33-side flpr-host app (in the sibling directory) embeds in its image.

gmake TARGET=nrf-vpr WERROR=0

Output: build/nrf-vpr/hello-vpr.bin (~8 KB).

Cannot be flashed standalone — see the sibling flpr-host example for the M33 companion that launches it via the SPU + VPR boot dance.

See doc/platforms/nrf-vpr.md for the full port documentation.