From 918287d9da2ba611b15a14503e51a4e26e802bb4 Mon Sep 17 00:00:00 2001
From: wangfq <wangfq@collectpublish.net>
Date: Mon, 29 Jun 2026 17:16:47 +0800
Subject: [PATCH] =?UTF-8?q?clean:=20=E5=88=A0=E9=99=A4=E6=AD=BB=E4=BB=A3?=
 =?UTF-8?q?=E7=A0=81=20ALFA=5FFAST=20(=E5=90=8C=E6=AD=A5=20DLD154V4B)?=
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---
 vd960Loop/utilities/at32f421_freertos_demo/inc/TaskLoop.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/vd960Loop/utilities/at32f421_freertos_demo/inc/TaskLoop.h b/vd960Loop/utilities/at32f421_freertos_demo/inc/TaskLoop.h
index 122ebef..0db34d2 100644
--- a/vd960Loop/utilities/at32f421_freertos_demo/inc/TaskLoop.h
+++ b/vd960Loop/utilities/at32f421_freertos_demo/inc/TaskLoop.h
@@ -31,7 +31,7 @@
  *   tick 提升到 10ms，滤波系数同步调整，保持等效时间常数
  *===========================================================================*/
 #define   ALFA_CAP1        18             // IIR α = 18/256 ≈ 0.07 (@10ms → τ≈135ms, 等效 50ms 的 79/256)
-#define   ALFA_FAST        128            // 快速 IIR α = 128/256 = 0.5 (@10ms → τ≈28ms, 用于检测)
+/* 快速 IIR (CAPVD_fast): α=128/256=0.5, τ≈28ms, 用 (old+new)/2 实现，无需宏 */
 #define   MAX_SLOPE_RATE   5              // 斜率限幅: 单次最大变化 5%
 #define   ENTRY_CONFIRM    3              // 进入确认: 连续 N 次低于阈值
 #define   STABLE_SAMPLES   128            // 稳定期样本数