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fix(V4B): V4.27 — 频率测量 4 倍偏差修正 (示波器 30.23k vs 打印 7k)

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根因(两处2倍叠加):
1. calc_freq_khz 常数 60000 按 60MHz 假设; 实际 TMR3 计数时钟=sclk=120MHz (HEXT×10, AHB/APB1÷1)
2. 输入捕获 DIV_2 (每2边沿捕获, Xn 翻倍), g_input_div 从未参与换算
→ Xn=2×120M/f_real, f_print=f_real/4 (30.23/4=7.56✓ 36.82/4=9.21✓)

改动: calc 60000→240000 (注释推导); coil_l_uH 改随 f_kHz (25330000/(f²×C66));
      DBG/EVT 用同一 _fk; 版本 V4.27; spec §4.1.2 文字更正 + devlog/design v0.4 标注影响

影响: 旧日志 f/L 需×4 (16.3kHz 假象实为 65.2kHz≈90µH 正常线圈); V4.26 告警窗随真实 f 自洽
This commit is contained in:
wangfq
2026-09-03 11:49:43 +08:00
parent dd14e083fa
commit 6b7d624ff0
5 changed files with 70 additions and 21 deletions
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utilities/at32f421_freertos_demo/inc/cmcng.h
+2 -2
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@@ -14,10 +14,10 @@
#define __CMCNG_H__
#define PRODUCT_MODEL "DLD154"
#define FIRMWARE_VER "4.26"
#define FIRMWARE_VER "4.27"
#define HARDWARE_VER "3.00"
#define FIRMWARE_VER_MAIN 4
#define FIRMWARE_VER_SUB 26
#define FIRMWARE_VER_SUB 27
#define HARDWARE_VER_MAIN 3
#define HARDWARE_VER_SUB 0