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怎样在开机让gpio设置高电平，即ubl时就是高电平
你好，
你是要在ubl之前就固定某个GPIO输出高电平？如何是，这是没有办法做到的。ubl之前是ROM code，是预先烧好在芯片里面的，是无法修改的。
估计只能用上拉电阻的办法了
