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radar_system/docs/run_config.md
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2026-06-04 18:33:38 +03:00

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# Run Config Reference
`run_config.json` is the stable runtime configuration consumed by the GUI,
Python helpers, and C++ pipeline binaries. The active file is normally
`run_config.json`; root-level `*.example.json` files are templates.
JSON does not support comments. Keep notes in docs, not inside config files.
## Top-Level Sections
```json
{
"radar": {},
"switches": {},
"run": {},
"preprocess": {},
"gpr": {},
"rings": {}
}
```
## `radar`
Selects the radar model and sweep settings.
```json
"radar": {
"model": "compact_m_k209",
"serial": "",
"remote_host": "127.0.0.1",
"remote_port": 50209,
"driver_mode": "native",
"mock_signal_hz": 5000000.0,
"multi_device": {},
"kamil_adc": {},
"laser_control": {},
"sweep": {}
}
```
Fields:
| Field | Meaning |
| --- | --- |
| `model` | `librevna`, `librevna_multi`, `compact_m_k209`, `sn9000`, or `kamil_adc`. |
| `serial` | LibreVNA serial. Empty means first device for single LibreVNA. For `librevna_multi`, this is the master serial. Unused by `compact_m_k209` and `sn9000`. |
| `remote_host` | SCPI server host. For `compact_m_k209` it is the K209 relay server host; for `sn9000` it is the SNVNA HiSLIP host. Ignored by LibreVNA modes. |
| `remote_port` | SCPI server TCP port. Default `50209` for `compact_m_k209` (relay), `4880` for `sn9000` (SNVNA HiSLIP). |
| `driver_mode` | `native` for hardware, `mock` for supported synthetic LibreVNA modes. K209, SN9000, and Kamil ADC require `native`. |
| `mock_signal_hz` | Existing LibreVNA mock signal parameter used by C++ mock acquisition. |
| `multi_device` | Extra settings for `librevna_multi`. |
| `kamil_adc` | External collector process and TTY settings for `kamil_adc`. |
| `laser_control` | Laser board settings applied before `kamil_adc` collection starts. |
| `sweep` | Frequency, point count, IFBW, and power settings. |
### `radar.sweep`
```json
"sweep": {
"start_hz": 1000000.0,
"stop_hz": 6000000000.0,
"points": 201,
"if_bandwidth_hz": 50000.0,
"stimulus_power_dbm": -10.0
}
```
Fields:
| Field | Meaning |
| --- | --- |
| `start_hz` | Sweep start frequency in Hz. |
| `stop_hz` | Sweep stop frequency in Hz. Must be `>= start_hz`. |
| `points` | Number of frequency points. |
| `if_bandwidth_hz` | IF bandwidth in Hz. |
| `stimulus_power_dbm` | Output power in dBm. |
K209 limits reported by the tested device:
```text
frequency_hz: 9000 .. 9000000000
ifbw_hz: 1 .. 300000
power_dbm: -55 .. +5
points: 2 .. 500001
```
### `radar.multi_device`
Used only when `radar.model == "librevna_multi"`.
```json
"multi_device": {
"slave_serials": [
"SLAVE_SERIAL_1",
"SLAVE_SERIAL_2"
],
"force_external_reference": true,
"recovery_attempts": 3
}
```
Fields:
| Field | Meaning |
| --- | --- |
| `slave_serials` | Exactly two slave LibreVNA serials. |
| `force_external_reference` | Configure the synchronized external reference path. |
| `recovery_attempts` | Reopen/retry attempts after native multi-device acquisition errors. |
### `radar.kamil_adc`
Used only when `radar.model == "kamil_adc"`.
```json
"kamil_adc": {
"project_dir": "/home/europa/Documents/kamil_adc",
"executable_path": "/home/europa/Documents/kamil_adc/kamil_adc_capture",
"tty_path": "/tmp/ttyADC_data",
"args": [
"profile:phase",
"clock:internal",
"internal_ref_hz:2000000",
"mode:diff",
"channels:2",
"ch1:2",
"ch2:3",
"do1_toggle_per_frame",
"do1_pair_subtract_avg"
],
"env": {},
"startup_timeout_s": 5.0,
"sweep_timeout_s": 5.0,
"stop_timeout_s": 2.0
}
```
Fields:
| Field | Meaning |
| --- | --- |
| `project_dir` | Working directory for the external ADC collector. Required. |
| `executable_path` | Full path to the Raspberry Pi executable. Required; no filename is assumed. |
| `tty_path` | TTY stream path, for example `/tmp/ttyADC_data`. The producer appends `tty:<tty_path>`. |
| `args` | Explicit collector arguments, excluding any `tty:` argument. |
| `env` | Extra environment variables for the collector process. |
| `startup_timeout_s` | Time allowed for the collector to create a fresh TTY path. |
| `sweep_timeout_s` | Time allowed to receive one full sweep packet. |
| `stop_timeout_s` | Graceful stop timeout before killing the collector process. |
The TTY frame format is strict: packet start is `0x000A 0xFFFF 0xFFFF 0xFFFF`,
then each sweep point is `0x000A step data1 data2`. Steps must arrive as
`1..N`; `N` is derived from the stream when the next packet start arrives.
`radar.sweep.points` is not used by the Kamil ADC producer. `S21` is
`data1 + j*data2`; `S11` is stored as explicit zeros.
### `radar.laser_control`
Used with `kamil_adc` when the laser board must be configured before ADC
collection starts. `laser_control` and `kamil_adc` are one hardware
configuration unit: changing either section requires restarting acquisition.
```json
"laser_control": {
"enabled": true,
"port": "/dev/ttyUSB0",
"mode": "variation",
"pi_coeff1_p": 2560,
"pi_coeff1_i": 128,
"pi_coeff2_p": 2560,
"pi_coeff2_i": 128,
"manual": {
"temp1": 25.0,
"temp2": 25.0,
"current1": 30.0,
"current2": 30.0
},
"variation": {
"variation_type": "CHANGE_CURRENT_LD1",
"static_temp1": 28.0,
"static_temp2": 28.9,
"static_current1": 33.0,
"static_current2": 35.0,
"min_value": 33.0,
"max_value": 60.0,
"step": 0.05,
"time_step": 50,
"delay_time": 10
}
}
```
`mode="manual"` uses `manual`. `mode="variation"` uses `variation`.
`variation_type` is the enum name from `laser_control`, for example
`CHANGE_CURRENT_LD1` or `CHANGE_TEMPERATURE_LD2`.
## `switches`
Two RF switch sections are used:
```json
"switches": {
"port1": {},
"port2": {}
}
```
By convention in the C++ pipeline:
```text
port1 -> output switch
port2 -> input switch
```
Switch fields:
| Field | Meaning |
| --- | --- |
| `name` | Human-readable switch name. |
| `driver_mode` | `native` for GPIO, `mock` to avoid GPIO access. |
| `driver` | `h7992` or `hmc349a`. |
| `radar_port` | Physical radar port mapping, must be unique and either `1` or `2`. |
| `positions` | Number of switch positions. |
| `default_position` | Position selected on open. Zero-based. |
| `gpio_chip` | Linux GPIO chip path, usually `/dev/gpiochip0`. |
| `pin_a` | First GPIO control pin. |
| `pin_b` | Second GPIO control pin for `h7992`. |
| `invert_logic` | Logic inversion for supported switch drivers. |
Use mock switches on a laptop without GPIO:
```json
"driver_mode": "mock"
```
## `control_button`
Optional physical GPIO push-button that triggers a runtime action on press.
The watcher runs in both GUI and headless modes (it is attached to the main
window, which both launch paths build). On press it reuses the existing
"Capture Tmp Reference" flow: stop the pipeline, capture a fresh tmp S21
reference with the current sweep settings, then restart the pipeline if it had
been running.
```json
"control_button": {
"enabled": true,
"gpio_chip": "/dev/gpiochip0",
"pin": 26,
"active_low": true,
"bias": "",
"debounce_ms": 50,
"action": "capture_tmp_reference"
}
```
| Field | Meaning |
| --- | --- |
| `enabled` | Master switch. When `false` (default) no GPIO line is opened, so non-Pi hosts are unaffected. |
| `gpio_chip` | Linux GPIO chip path, usually `/dev/gpiochip0`. |
| `pin` | BCM line offset of the button. `26` is physical pin 37, with GND on physical pin 39. |
| `active_low` | `true` for a button wired to GND with the internal pull-up: the line idles high and a press is detected on the falling edge. `false` mirrors this for a button wired to 3V3 with a pull-down (rising edge). |
| `bias` | Internal bias override: `pull_up`, `pull_down`, or `disabled`. Empty (default) derives the bias from `active_low`. |
| `debounce_ms` | Hardware debounce period applied by the kernel, in milliseconds. |
| `action` | Action to run on press. Currently only `capture_tmp_reference`. |
Occupied BCM lines (native switches) are `17`, `22`, `23`, `27`; pick a free
line such as `16`, `20`, `21`, or `26` for the button. A failure to open the
line (missing chip, line already in use) is logged as a warning and never
aborts startup.
## `run`
Runtime behavior and combo selection.
```json
"run": {
"settling_ms": 0,
"idle_sleep_ms": 2,
"continuous": true,
"processing_live_config_path": "python_app/runtime/processing_live.json",
"locator_server": {},
"combos": [
{"input": 0, "output": 0}
]
}
```
Fields:
| Field | Meaning |
| --- | --- |
| `settling_ms` | Delay after switching before measuring. |
| `idle_sleep_ms` | Sleep between continuous collections. |
| `continuous` | `true` loops until stopped; `false` captures one collection and exits. |
| `processing_live_config_path` | Runtime path used by processing live settings. |
| `locator_server` | Embedded TCP server settings for publishing locator results. |
| `combos` | Zero-based switch combinations to acquire. |
`combos` entries use input/output switch positions:
```json
{"input": 2, "output": 1}
```
For `librevna_multi` and `sn9000`, the model constraints force the canonical
virtual matrix:
```text
input: 0..3
output: 0..1
```
## `run.locator_server`
Settings for the embedded locator result TCP server.
| Field | Meaning |
| --- | --- |
| `device_id` | Device identifier in locator payloads. |
| `protocol_version` | Locator payload protocol version. |
| `host` | Bind host, commonly `0.0.0.0`. |
| `port` | TCP port, commonly `8888`. |
| `max_payload_bytes` | Maximum result payload size. |
| `client_queue_size` | Per-client queue size. |
| `logger_name` | Logger name used by the service. |
## `preprocess`
Names or bundle paths for calibration/reference assets used by preprocessing.
```json
"preprocess": {
"s21": {
"calibration": {"set_name": "", "bundle_path": ""},
"reference": {"set_name": "", "bundle_path": ""}
},
"s11": {
"calibration": {
"open": {"set_name": "", "bundle_path": ""},
"short": {"set_name": "", "bundle_path": ""},
"load": {"set_name": "", "bundle_path": ""}
},
"reference": {"set_name": "", "bundle_path": ""}
},
"notch": {
"enabled": true,
"bands_hz": [],
"taper_width_hz": 40000000.0,
"taper_type": "cosine"
}
}
```
`set_name` selects a stored set for the active radar key. `bundle_path` can
point to an exported bundle. Empty values mean no asset is selected.
`notch.bands_hz` is a list of `[low_hz, high_hz]` ranges. `taper_type` is
`cosine` or `hard`.
## `gpr`
GPR geometry and processing configuration.
```json
"gpr": {
"relative_permittivity": 1.0,
"tx_geometry": [
{"output_pos": 0, "x_m": 0.905}
],
"rx_geometry": [
{"input_pos": 0, "x_m": -0.18}
]
}
```
Fields:
| Field | Meaning |
| --- | --- |
| `relative_permittivity` | Medium relative permittivity used for propagation speed. |
| `tx_geometry` | Transmitter positions keyed by output switch position. |
| `rx_geometry` | Receiver positions keyed by input switch position. |
Geometry positions must match configured switch positions. For example, an
`output_pos` of `1` requires the output switch to have at least 2 positions.
## `rings`
Shared-memory ring endpoints used by native processes.
```json
"rings": {
"raw": {"name": "/radar_raw", "capacity": 50, "slot_size_bytes": 2097152},
"raw_tap": {"name": "/radar_raw_tap", "capacity": 50, "slot_size_bytes": 2097152},
"preprocessed": {"name": "/radar_preprocessed", "capacity": 50, "slot_size_bytes": 2097152},
"preprocessed_tap": {"name": "/radar_preprocessed_tap", "capacity": 50, "slot_size_bytes": 2097152},
"results": {"name": "/radar_results", "capacity": 50, "slot_size_bytes": 2097152}
}
```
Fields:
| Field | Meaning |
| --- | --- |
| `name` | POSIX shared-memory object name. |
| `capacity` | Number of slots. |
| `slot_size_bytes` | Maximum serialized payload size per slot. |
Use unique ring names for parallel tests to avoid collisions with a running GUI
session.
## Minimal Model Examples
Single LibreVNA:
```json
"radar": {
"model": "librevna",
"serial": "",
"driver_mode": "native"
}
```
Multi-device LibreVNA:
```json
"radar": {
"model": "librevna_multi",
"serial": "MASTER_SERIAL",
"driver_mode": "native",
"multi_device": {
"slave_serials": ["SLAVE_1", "SLAVE_2"],
"force_external_reference": true,
"recovery_attempts": 3
}
}
```
Compact-M K209 via remote server:
```json
"radar": {
"model": "compact_m_k209",
"remote_host": "192.168.1.10",
"remote_port": 50209,
"driver_mode": "native"
}
```
SN9000 (PLANAR Иридиум) via SNVNA HiSLIP:
```json
"radar": {
"model": "sn9000",
"remote_host": "192.168.1.10",
"remote_port": 4880,
"driver_mode": "native"
}
```
Kamil ADC:
```json
"radar": {
"model": "kamil_adc",
"serial": "kamil_adc",
"driver_mode": "native",
"kamil_adc": {
"project_dir": "/home/europa/Documents/kamil_adc",
"executable_path": "/home/europa/Documents/kamil_adc/kamil_adc_capture",
"tty_path": "/tmp/ttyADC_data"
},
"laser_control": {
"enabled": true,
"port": "/dev/ttyUSB0",
"mode": "variation"
}
}
```