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      <title>FreeRTOS 调度器：状态、固定优先级与切换边界</title>
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      <description>能够根据任务的就绪、阻塞状态与固定优先级，预测单核 FreeRTOS 的运行任务和切换时机，并在 STM32F407xx 参考实现中追踪节拍、异常与任务切换链，区分主机模型验证和目标硬件验证。</description>
      
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