From c6f05fa802904ad21e723c0e3487e2019f7eff74 Mon Sep 17 00:00:00 2001
From: jhchun <jh.chun@medithings.co.kr>
Date: Fri, 12 Jun 2026 15:28:59 +0900
Subject: [PATCH] =?UTF-8?q?ADC=20read=20=ED=85=8C=EC=8A=A4=ED=8A=B8=20?=
 =?UTF-8?q?=EC=BB=A4=EB=A7=A8=EB=93=9C?=
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---
 src/parser.c | 113 +++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 113 insertions(+)

diff --git a/src/parser.c b/src/parser.c
index 58f2d7d..cd3597e 100644
--- a/src/parser.c
+++ b/src/parser.c
@@ -566,6 +566,70 @@ static int perform_single_piezo_capture(uint8_t cycles,
 
 /* msn? → 배터리 전압 측정 → rsn: + mV */
 
+static int perform_adc_only_capture(uint16_t num_samples,
+                                    uint16_t averaging,
+                                    uint8_t channel)
+{
+    if (channel >= PIEZO_NUM_CHANNELS)
+    {
+        return ECHO_STATUS_MUX;
+    }
+
+    if ((num_samples == 0U) || (num_samples > ECHO_ADC_MAX_SAMPLES))
+    {
+        return ECHO_STATUS_CAPTURE;
+    }
+
+    if (averaging == 0U)
+    {
+        averaging = 1U;
+    }
+
+    int err = piezo_select_channel(channel);
+    if (err)
+    {
+        return ECHO_STATUS_MUX;
+    }
+
+    k_busy_wait(PIEZO_POST_SELECT_SETTLE_US);
+
+    err = echo_adc_wake();
+    if (err)
+    {
+        return ECHO_STATUS_CAPTURE;
+    }
+
+    memset(echo_accum, 0, sizeof(echo_accum));
+
+    for (uint16_t avg = 0; avg < averaging; avg++)
+    {
+        if (avg > 0U)
+        {
+            k_busy_wait(PIEZO_AVG_INTER_BURST_GAP_US);
+        }
+
+        unsigned int key = irq_lock();
+        err = echo_adc_capture(echo_capture, num_samples);
+        irq_unlock(key);
+        if (err)
+        {
+            return ECHO_STATUS_CAPTURE;
+        }
+
+        for (uint16_t i = 0; i < num_samples; i++)
+        {
+            echo_accum[i] += echo_capture[i];
+        }
+    }
+
+    for (uint16_t i = 0; i < num_samples; i++)
+    {
+        echo_capture[i] = (uint16_t)(echo_accum[i] / averaging);
+    }
+
+    return ECHO_STATUS_OK;
+}
+
 static int cmd_msn(const uint8_t *data, uint8_t data_len)
 {
     ARG_UNUSED(data);
@@ -819,6 +883,54 @@ static int cmd_mec(const uint8_t *data, uint8_t data_len)
  * - reb: 패킷 6개 전송
  * - raa: 상태값은 전체 작업 성공/실패 요약
  */
+static int cmd_mad(const uint8_t *data, uint8_t data_len)
+{
+    const piezo_config_t *cfg = piezo_config_get();
+    uint16_t num_samples = cfg->samples;
+    uint16_t averaging = cfg->avg;
+    uint16_t piezo_ch = 0;
+    uint8_t session = g_echo_session++;
+
+    get_data_u16_be(data, data_len, 2, &num_samples);
+    get_data_u16_be(data, data_len, 4, &averaging);
+    get_data_u16_be(data, data_len, 5, &piezo_ch);
+
+    if (num_samples > ECHO_ADC_MAX_SAMPLES)
+    {
+        num_samples = ECHO_ADC_MAX_SAMPLES;
+    }
+    if (averaging == 0U)
+    {
+        averaging = 1U;
+    }
+
+    processing = true;
+    power_button_suspend(true);
+
+    int status = start_piezo_session();
+    if (status == ECHO_STATUS_OK)
+    {
+        status = perform_adc_only_capture(num_samples, averaging, (uint8_t)(piezo_ch % PIEZO_NUM_CHANNELS));
+    }
+
+    if (status == ECHO_STATUS_OK)
+    {
+        send_response_echo(session, (uint8_t)(piezo_ch % PIEZO_NUM_CHANNELS), echo_capture, num_samples);
+    }
+
+    piezo_power_off();
+    power_button_suspend(false);
+    send_response_u16("raa:", (uint16_t)status);
+    DBG_PRINTF("[CMD] mad status=0x%04X ch=%u samples=%u avg=%u\r\n",
+               status,
+               (uint16_t)(piezo_ch % PIEZO_NUM_CHANNELS),
+               num_samples,
+               averaging);
+
+    processing = false;
+    return 1;
+}
+
 static int cmd_maa(const uint8_t *data, uint8_t data_len)
 {
     ARG_UNUSED(data);
@@ -1181,6 +1293,7 @@ static const cmd_entry_t cmd_table[] =
     { "mpb?", cmd_mpb },
     { "mpc?", cmd_mpc },
     { "mec?", cmd_mec },
+    { "mad?", cmd_mad },
     { "maa?", cmd_maa },
     { "mbb?", cmd_mbb },
     { "mcf?", cmd_mcf },