根据Document中的pinctrl.txt中所说:
Rather hardware engineers think that "GPIO mode" means that you can software-control a few electrical properties of the pin that you would not be able to control if the pin was in some other mode, such as muxed in for a device.& T; T$ c0 q& r( L# i: U
是否是指:只有在将一个pin指定为gpio-mode时才能使用软件控制其电气特性。那么如果将pin的功能指定为I2C、UART或者I2S的话,pin的电气特性是在何时何处配置的呢?
另外,请教一下,I2S使能时,它所使用的数据引脚的电气特性是怎样的(输入/输出/拉高/拉低)。还有,如果是使用一个6mic的麦克风阵列,使用I2S时,I2S的pin状态又是怎样的呢?' I! N2 B r* [3 M. U
请路过的大神赐教!
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