From 3ec6afec36147bed4185e4f65244fab7ace5f481 Mon Sep 17 00:00:00 2001
From: jhChun <linea150028@gmail.com>
Date: Tue, 7 Apr 2026 14:17:06 +0900
Subject: [PATCH] =?UTF-8?q?MUX=20=EC=A0=84=ED=99=98=20=ED=9B=84=20ADC=20S/?=
 =?UTF-8?q?H=20=EC=BB=A4=ED=8C=A8=EC=8B=9C=ED=84=B0=20=EC=95=88=EC=A0=95?=
 =?UTF-8?q?=ED=99=94=EB=A5=BC=20=EC=9C=84=ED=95=9C=20dummy=20read?=
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---
 pc_firm/dr_adc121s051/dr_adc121s051.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/pc_firm/dr_adc121s051/dr_adc121s051.c b/pc_firm/dr_adc121s051/dr_adc121s051.c
index 3e0e597..03d136b 100644
--- a/pc_firm/dr_adc121s051/dr_adc121s051.c
+++ b/pc_firm/dr_adc121s051/dr_adc121s051.c
@@ -795,6 +795,9 @@ dr_adc_err_t dr_adc_capture_channel_only(uint8_t freq_option, uint16_t delay_us,
     /* 채널 선택(MUX) : 1.3ms */
     dr_piezo_select_channel(piezo_ch);
 
+    /* MUX 전환 후 S/H 커패시터 안정화를 위한 dummy read */
+    (void)spim_read_raw();
+
     /* 채널당 반복 측정 횟수만큼 */
     for (uint16_t avg_iter = 0; avg_iter < averaging; avg_iter++)
     {