可实现ep9313的GPIO接口的驱动，可实现对GPIOA接口的读写和某个引脚高低电平的设置。类比此驱动，可很快实现其他流接口驱动编写。-Ep9313 can realize the GPIO interface driver can be realized GPIOA interface pin high literacy and a low-level settings. Analog of this drive can quickly realize the preparation of other stream interface drivers.
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