最近在项目需要增加一个定时器,发现RTI的寄存器写不了,查看手册发现写寄存器需要在Privileged mode 下才可以写,
怎么才可以从用户模式进入Privileged 模式?

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最近在项目需要增加一个定时器,发现RTI的寄存器写不了,查看手册发现写寄存器需要在Privileged mode 下才可以写,
怎么才可以从用户模式进入Privileged 模式?
