fix(spotlight): 优化PWM调光算法解决低亮度抖动

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1. 修改PWM频率为4000Hz，与80MHz基准时钟形成整数倍关系(20000 ticks)，消除计算取整导致的物理层抖动。
2. 实现基于时间轴的渐变算法替代原有的步进累加逻辑，消除累积误差，确保渐变时长精确且不受系统负载影响。
3. 调整渐变刷新间隔为8ms，提升视觉平滑度。

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Ekko.bao

2025-11-22 13:02:12 +08:00

parent 46cdd963a9

commit dcef9664ae

17 changed files with 72 additions and 84 deletions

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