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TMS320F28379D: 上电后5 V和3.3 V引脚无电压

Part Number: TMS320F28379D
Other Parts Discussed in Thread: DAC1282, LAUNCHXL-F28379D, C2000WARE

您好,

我今天尝试用TMS320F28379D LaunchPad的3.3 V和5 V电压引脚去给其他工作电压为3.3 V和5 V的模块进行供电,之前测试过3.3 V的引脚在上电时是有3.3 V电压的,但是模块并不能正常运行。

随后用万用表和示波器测试3.3 V和5 V电压引脚显示电压为10 mV左右的杂波(几乎没有电压)。

之后又用下面的程序GPIO使输出高电平,但是相应引脚测量仍没有电压。

请问这是什么原因?谢谢。

GpioCtrlRegs.GPDPUD.bit.GPIO111 = 0;
GpioCtrlRegs.GPDMUX1.bit.GPIO111 = 0;
GpioCtrlRegs.GPDDIR.bit.GPIO111 = 1;
GpioDataRegs.GPDSET.bit.GPIO111 = 1;