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update 说明文档/CosyOS原理与应用.md.

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Signed-off-by: 零中断延迟的RTOS <cosyos@139.com>
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零中断延迟的RTOS
2024-02-28 04:30:44 +00:00
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说明文档/CosyOS原理与应用.md
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@@ -239,7 +239,7 @@ FreeRTOS的零中断延迟有着很大的局限性。<br>
3、其它内核无法实现零中断延迟。<br>
* **Keil RTX4/5** <br>
由SysTick、PendSV、SVC，构成服务层临界区，再配合互斥访问指令[STREX、LDREX]实现零中断延迟。<br>
仅Cortex-M3/M4等少数内核（支持STREX/LDREX等互斥访问指令）支持零中断延迟，其它内核无法实现零中断延迟。<br>
仅Cortex-M3及以上内核（支持STREX/LDREX互斥访问指令）支持零中断延迟，其它内核无法实现零中断延迟。<br>
* **CosyOS-I/II** <br>
所有内核均可实现零中断延迟，只要用户中断不是最低优先级就可实现零中断延迟。<br>