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关于EALLOW....EDIS指令的问题

Other Parts Discussed in Thread: CONTROLSUITE

我是新手,调试程序时,想控制某个端口,相应的寄存器都配置完毕,但端口电平就是不改变,后来经询问网友和仔细查看例程,才发现要改变寄存器的值必须在语句的头尾加上这个EALLOW....EDIS指令,配置才起作用,但我想进一步的知道,F28335里哪些寄存器是受保护的,哪些不是,TI是不是有这方面的文档资料,介绍,有的话,望管理员给个连接地址,最好是中文的,谢谢了