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cc3200 ota 升级失败的回退问题



ti工程师,你好,请问下,3200升级过程中如果失败了,怎么实现回退?比如mcuimg2运行时,进行升级,新的image写到了mcuimg3的位置,设置testready,然后重启,loader设置testing,启动mcuimg3,但mcuimg3是错误的(或者是image有问题,或者是flash烧写产生了错误),程序跑非了,那这个时候如何实现回退?好像只有重启后,loader才会根据testing标志位来切回到mcuimg2,但这个重启的动作是谁触发呢?mcuimg3已经跑飞了,不可能去做重启的动作啊,也没看到example的ota中有watchdog的操作?请问是谁触发重启呢?