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已更新 2025年7月

RTOS上下文切换 - 步骤 5

[详细示例]

检索到 TaskB 的堆栈指针

AtoB4.gif

必须恢复 TaskB 上下文。RTOS 宏 portRESTORE_CONTEXT 做的第一件事就是 从 TaskB 挂起时获取的拷贝中检索 TaskB 堆栈指针。TaskB 堆栈指针被加载到处理器堆栈指针中, 因此现在 AVR 堆栈指向 TaskB 上下文的顶部。

下一节:RTOS 实现 - 详细示例步骤 6