303871275b
Implement the hardware and firmware portions of RuvSense (ADR-029) and RuView (ADR-031) for multistatic WiFi sensing: Rust (wifi-densepose-hardware): - TdmSchedule: uniform slot assignments with configurable cycle period, guard intervals, and processing window (default 4-node 20 Hz) - TdmCoordinator: manages sensing cycles, tracks per-slot completion, cumulative clock drift compensation (±10 ppm over 50 ms = 0.5 us) - SyncBeacon: 16-byte wire format for cycle synchronization with drift correction offsets - TdmSlotCompleted event for aggregator notification - 18 unit tests + 4 doctests, all passing Firmware (C, ESP32): - Channel-hop table in csi_collector.c (s_hop_channels, configurable via csi_collector_set_hop_table) - Timer-driven channel hopping via esp_timer at dwell intervals - NDP frame injection stub via esp_wifi_80211_tx() - Backward-compatible: hop_count=1 disables hopping entirely - NVS config extension: hop_count, chan_list, dwell_ms, tdm_slot, tdm_node_count with bounds validation and Kconfig fallback defaults Co-Authored-By: claude-flow <ruv@ruv.net>
85 lines
2.6 KiB
C
85 lines
2.6 KiB
C
/**
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* @file csi_collector.h
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* @brief CSI data collection and ADR-018 binary frame serialization.
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*/
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#ifndef CSI_COLLECTOR_H
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#define CSI_COLLECTOR_H
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#include <stdint.h>
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#include <stddef.h>
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#include "esp_wifi_types.h"
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/** ADR-018 magic number. */
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#define CSI_MAGIC 0xC5110001
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/** ADR-018 header size in bytes. */
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#define CSI_HEADER_SIZE 20
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/** Maximum frame buffer size (header + 4 antennas * 256 subcarriers * 2 bytes). */
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#define CSI_MAX_FRAME_SIZE (CSI_HEADER_SIZE + 4 * 256 * 2)
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/** Maximum number of channels in the hop table (ADR-029). */
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#define CSI_HOP_CHANNELS_MAX 6
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/**
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* Initialize CSI collection.
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* Registers the WiFi CSI callback.
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*/
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void csi_collector_init(void);
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/**
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* Serialize CSI data into ADR-018 binary frame format.
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*
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* @param info WiFi CSI info from the ESP-IDF callback.
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* @param buf Output buffer (must be at least CSI_MAX_FRAME_SIZE bytes).
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* @param buf_len Size of the output buffer.
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* @return Number of bytes written, or 0 on error.
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*/
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size_t csi_serialize_frame(const wifi_csi_info_t *info, uint8_t *buf, size_t buf_len);
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/**
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* Configure the channel-hop table for multi-band sensing (ADR-029).
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*
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* When hop_count == 1 the collector stays on the single configured channel
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* (backward-compatible with the original single-channel mode).
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*
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* @param channels Array of WiFi channel numbers (1-14 for 2.4 GHz, 36-177 for 5 GHz).
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* @param hop_count Number of entries in the channels array (1..CSI_HOP_CHANNELS_MAX).
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* @param dwell_ms Dwell time per channel in milliseconds (>= 10).
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*/
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void csi_collector_set_hop_table(const uint8_t *channels, uint8_t hop_count, uint32_t dwell_ms);
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/**
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* Advance to the next channel in the hop table.
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*
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* Called by the hop timer callback. If hop_count <= 1 this is a no-op.
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* Calls esp_wifi_set_channel() internally.
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*/
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void csi_hop_next_channel(void);
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/**
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* Start the channel-hop timer.
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*
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* Creates an esp_timer periodic callback that fires every dwell_ms
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* milliseconds, calling csi_hop_next_channel(). If hop_count <= 1
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* the timer is not started (single-channel backward-compatible mode).
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*/
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void csi_collector_start_hop_timer(void);
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/**
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* Inject an NDP (Null Data Packet) frame for sensing.
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*
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* Uses esp_wifi_80211_tx() to send a preamble-only frame (~24 us airtime)
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* that triggers CSI measurement at all receivers. This is the "sensing-first"
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* TX mechanism described in ADR-029.
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*
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* @return ESP_OK on success, or an error code.
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*
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* @note TODO: Full NDP frame construction. Currently sends a minimal
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* null-data frame as a placeholder.
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*/
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esp_err_t csi_inject_ndp_frame(void);
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#endif /* CSI_COLLECTOR_H */
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