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TMS320F28377S: 运行Gpio_toggle_cpu01例程中部分GPIO值不改变

Part Number: TMS320F28377S
Other Parts Discussed in Thread: C2000WARE

起因是项目中我想使用GPIO8和GPIO9作为SCIA,发现无通讯。经过测试发现GPIO8和GPIO9即使作为GPIO配置依然无动作。

使用例程C:\ti\c2000\C2000Ware_4_01_00_00\device_support\f2837xs\examples\cpu1\gpio_toggle测试发现部分GPIO的值确实不随着配置改变,参见下图。

图中在我断点处GPADAT的值应该是0xAAAAAAAAA,但Expressions中监测到的值是0xAB8008AA。

请问是什么原因?