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请问TMS320F28035上电过程中是否将IO口设置为输入状态？上拉电阻多大？
默认都是输入状态，但是GPIO12以上的IO口都默认上拉使能，所以你去测的话会有高电平。
弱上拉。没有具体的上拉电阻值。
http://processors.wiki.ti.com/index.php/General_Purpose_IO_(GPIO)_FAQ_for_C2000?keyMatch=GPIO%20FAQ&tisearch=Search-EN-Everything#Q:_What_is_the_value_of_the_pull-up_and_pull-down_resistors.3F
Eric
谢谢！
