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TMS320F280041: 定时器的中断嵌套

Part Number: TMS320F280041

我现在要实现以下功能;

定义了Timer0为25us中断和Timer2为1us的中断;Timer0的中断优先级最高,运行中断服务程序不能被打断,但是可以打断Timer2的中断服务程序;

看说明书上介绍设备硬件的优先级Timer0比Timer2高,但实际运行中,感觉Timer2服务程序时,Timer0到来时,没直接运行Timer0,而是等Timer2运行完,才运行Timer0的;有什么办法实现?