aen-*-regcheck — on-silicon driver smoke tests

A suite of minimal register-level bench examples that each bind one E8 peripheral, exercise it through the portable Zephyr class API, and confirm the expected behaviour on real silicon (cross-checked with a J-Link mem32 read). They prove the driver binds + programs registers — the foundation the higher-level examples build on.

Source: examples/aen/.

Example	Block	Check
aen-crc-regcheck	hardware CRC (alif,crc)	CRC32/IEEE known-value vs host-precomputed reference
aen-dma-regcheck	ARM PL330 DMA	1000-byte M2M memcpy verified byte-for-byte (RESULT PASS)
aen-hwsem-regcheck	HWSEM (alif,hwsem)	take → count nonzero → give → count 0 (AMP mutual-exclusion latch)
aen-cmp-regcheck	HSCMP (alif,cmp)	high-speed comparator + internal DAC6 reference path alive
aen-lptimer-regcheck	LPTIMER (alif,lptimer)	always-on DOWN-counter decreases between two reads
aen-rtc-regcheck	LPRTC (snps,dw-apb-rtc)	always-on UP-counter advances (counter-only — not a calendar RTC)

The portable calendar surface on top of the LPRTC counter is the separate aen-rtc-calendar shim (alp_rtc_set_time() / alp_rtc_get_time()).

board.yaml

Each regcheck is single-core HE and pulls in its one peripheral, e.g.:

som:
  sku: E1M-AEN801

preset: e1m-evk

cores:
  m55_he:
    app: ./src
    peripherals: [counter]   # or: crc / dma / hwsem / cmp ...

diagnostics:
  log_level: info

Expected output

[aen-dma-regcheck] PL330 M2M copy 1000 bytes
[aen-dma-regcheck] memcmp OK
[aen-dma-regcheck] RESULT PASS

See also

• E1M-AEN — bench status
• <alp/counter.h> · <alp/rtc.h>