cam_ceu.h File Reference

App-specific GPIO diagnostic for the parallel DVP camera signals. More...

#include <stdint.h>
#include "ra8_err.h"

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Data Structures
struct	cam_ceu_sync_probe_t
	Snapshot of DVP sync activity observed through GPIO input samples. More...

Functions
ra8_err_t	cam_probe_sync_activity (cam_ceu_sync_probe_t *out_probe)
	Measure DVP sync, clock, and data activity before CEU routing.

Detailed Description

App-specific GPIO diagnostic for the parallel DVP camera signals.

Tag

[Ring 6 / APP] {World: S}

Samples the 11 J35 DVP pins as GPIO before the board adapter routes them to CEU. Capture itself uses the reusable ra8_camera_source_ceu backend with caller-owned state and storage; this app module retains only the unusually detailed signal-integrity probe needed by the HIL verdict banner.

Copyright

Copyright (c) 2026 Brighton Sikarskie SPDX-License-Identifier: MIT

Since

0.1.0

Definition in file cam_ceu.h.

Function Documentation

cam_probe_sync_activity()

ra8_err_t cam_probe_sync_activity

(

cam_ceu_sync_probe_t *

out_probe

)

Measure DVP sync, clock, and data activity before CEU routing.

Temporarily samples the camera connector as GPIO to characterize live sensor timing before the CEU peripheral claims the pins.

Parameters

[out]

out_probe

Receives observed sync transition counts.

Returns

ra8_err_t; ok when the GPIO sampling pass completed.

Return values

k_ra8_ok	Sampling completed and populated out_probe.
k_ra8_err_null_ptr	out_probe was null.

Precondition

The sensor is configured and streaming.

The DVP pins have not been claimed by ra8_board_camera_route_parallel_pins.

Postcondition

All temporary DVP GPIO claims are released.

out_probe contains bounded transition and data statistics on success.

Note

This diagnostic must run before parallel-pin routing.

Since

0.1.0

Definition at line 420 of file cam_ceu.c.

References cam_claim_probe_pins(), cam_get_probe_ports(), cam_measure_lines(), cam_measure_sync(), cam_release_probe_pins(), k_ra8_ok, k_ra8_pin_2, k_ra8_pin_3, k_ra8_pin_4, RA8_CHECK_NULL_PTR, and s_ceu_pins.

Referenced by cam_prepare_capture().