Working on SD and netowrking

src/storage/storage_config.h

@@ -112,3 +112,34 @@
 // logging exists, throughput should be derived from actual logging writes and
 // this benchmark disabled by setting the interval to 0 (measure once at boot).
 #define STORAGE_SPEED_MEASURE_INTERVAL_MS 0
+
+// --- Audio logging ----------------------------------------------------------
+//
+//  The DataLogger (docs/audio_logging.md) writes one multichannel WAV file
+//  per rotation. The Node collection task feeds it interleaved 40-channel PCM
+//  as chunks; the logger appends them and only the consumer touches the card.
+//
+//  Stream rate: 40 ch x 48 kHz x 2 B = 3,840,000 B/s. The 128 KB pool holds
+//  ~34 ms of audio, so collection rounds must stay <= ~25 ms (<= 96 KB) or
+//  the pool must grow (see docs/audio_logging.md section 7).
+
+// WAV parameters (must match what the Nodes produce).
+#define STORAGE_AUDIO_SAMPLE_RATE_HZ   48000
+#define STORAGE_AUDIO_CHANNELS         40      // 10 nodes x 4 mics
+#define STORAGE_AUDIO_BITS             16
+
+// Chunk pool: STORAGE_LOG_POOL_SIZE chunks of STORAGE_LOG_CHUNK_SIZE bytes,
+// allocated with MALLOC_CAP_DMA. 128 KB total.
+#define STORAGE_LOG_CHUNK_SIZE         (16 * 1024)
+#define STORAGE_LOG_POOL_SIZE          8
+
+// Recording directory and rotation policy.
+#define STORAGE_LOG_DIR                STORAGE_MOUNT_POINT "/audio"
+#define STORAGE_LOG_ROTATE_BYTES       (1024LL * 1024 * 1024)   // 1 GiB / file
+#define STORAGE_LOG_FLUSH_BYTES        (16LL * 1024 * 1024)     // f_sync cadence
+
+// Overflow warning LED: lights while chunks are being dropped because the SD
+// card cannot keep up. GPIO 4 is unused by the SD card lines (SPI 5/18/19/23,
+// SDMMC 6-11). Change both values if a different LED is wired.
+#define STORAGE_WARN_LED_GPIO          4
+#define STORAGE_WARN_LED_ACTIVE_HIGH   true