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c6848 sysbios工程定时器抖动

Other Parts Discussed in Thread: SYSBIOS

你好:sysbios中开了多个中断,使用了中断嵌套功能,定时器的中断线是4,配置不能被任何中断抢占,其他中断配置可以被4线中断抢占,定时器1ms来一个中断,翻转io引脚,抖动40us左右,要求5us左右,应该怎么解决?谢谢!不跑sysbios系统,裸跑没有这么严重,在2us左右!能不能硬件中断向量表不被sysbios接管?不接管应该怎么操作,现在用汇编中断向量表,不用sysbios的HWI模块,但是系统跑不起来。。。急急急,谢谢