本帖最后由 aacode 于 2021-9-18 10:54 编辑
在库函数中有输入，输出和双向
enum port_pin_dir {
/** The pin's input buffer should be enabled, so that the pin state can
* be read */
PORT_PIN_DIR_INPUT = SYSTEM_PINMUX_PIN_DIR_INPUT,
/** The pin's output buffer should be enabled, so that the pin state can
* be set */
PORT_PIN_DIR_OUTPUT = SYSTEM_PINMUX_PIN_DIR_OUTPUT,
/** The pin's output and input buffers should be enabled, so that the pin
* state can be set and read back */
PORT_PIN_DIR_OUTPUT_WTH_READBACK = SYSTEM_PINMUX_PIN_DIR_OUTPUT_WITH_READBACK,
};
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