feat: ADC 데이터 일별 CSV 저장 (Downloads/VesiScan_ADC/)

AdcCsvLogger: 측정마다 6채널 ADC를 CSV에 append - 파일: Downloads/VesiScan_ADC/YYYY-MM-DD.csv - 행: scan_id × 6채널 (1회 측정 = 6행) - 열: scan_id, timestamp, volume_ml, lr_ratio, channel, s0~s99 - BV 성공/실패 모두 ADC 저장 (volume_ml 빈칸이면 실패) - Python: pd.read_csv() → df[df.scan_id==1] 으로 1회 측정 추출 Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
2026-04-27 10:47:33 +09:00
parent abc70623fa
commit f563b20659
2 changed files with 88 additions and 0 deletions
@@ -0,0 +1,84 @@
+package com.example.medilightv2android.services
+
+import android.os.Environment
+import java.io.File
+import java.text.SimpleDateFormat
+import java.util.*
+
+/**
+ * ADC 데이터를 일별 CSV 파일로 저장.
+ *
+ * 파일 위치: Downloads/VesiScan_ADC/YYYY-MM-DD.csv
+ * 행: scan_id × 6채널 (측정 1회 = 6행)
+ * 열: scan_id, timestamp, volume_ml, lr_ratio, channel, sample_0~sample_99
+ */
+object AdcCsvLogger {
+
+    private val dayFmt = SimpleDateFormat("yyyy-MM-dd", Locale.US)
+    private val timeFmt = SimpleDateFormat("HH:mm:ss.SSS", Locale.US)
+    private var scanCounter = 0
+
+    private fun getDir(): File {
+        val dir = File(
+            Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_DOWNLOADS),
+            "VesiScan_ADC"
+        )
+        if (!dir.exists()) dir.mkdirs()
+        return dir
+    }
+
+    private fun getTodayFile(): File {
+        return File(getDir(), "${dayFmt.format(Date())}.csv")
+    }
+
+    /**
+     * 6채널 ADC 데이터를 CSV에 append.
+     *
+     * @param channels 6채널 ADC 버퍼 (List<List<UShort>>)
+     * @param volumeMl BV 추정 결과 (null이면 측정 실패)
+     * @param lrRatio lr_ratio 값
+     */
+    fun log(
+        channels: List<List<UShort>>,
+        volumeMl: Double? = null,
+        lrRatio: Double = 1.0
+    ) {
+        try {
+            val file = getTodayFile()
+            val isNew = !file.exists() || file.length() == 0L
+            scanCounter++
+
+            val timestamp = timeFmt.format(Date())
+            val volStr = volumeMl?.let { "%.1f".format(it) } ?: ""
+            val lrStr = "%.2f".format(lrRatio)
+
+            java.io.FileWriter(file, !isNew).buffered().use { writer ->
+                if (isNew) {
+                    val header = buildString {
+                        append("scan_id,timestamp,volume_ml,lr_ratio,channel")
+                        for (i in 0 until 100) append(",s$i")
+                    }
+                    writer.write(header)
+                    writer.newLine()
+                }
+
+                for ((chIdx, buffer) in channels.withIndex()) {
+                    val row = buildString {
+                        append("$scanCounter,$timestamp,$volStr,$lrStr,CH$chIdx")
+                        for (sample in buffer) {
+                            append(",${sample.toInt()}")
+                        }
+                        // 100개 미만이면 빈 칸으로 채움
+                        for (i in buffer.size until 100) {
+                            append(",")
+                        }
+                    }
+                    writer.write(row)
+                    writer.newLine()
+                }
+            }
+        } catch (_: Exception) {
+            // 로깅 실패는 앱 crash 방지
+        }
+    }
+}