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试了一下D1的GPIO,两个问题请教各位大佬:
1,D1哪吒开发板的GPIO引脚编号为什么设计成跟实际编号不一致?有没有可能对应起来?目前需要自己换算。
比如GPIO8/PP0,需要echo 2020 >export。gpiochip0的也需要自己换算。
2,PCF8574 扩展的 8 个 IO口,实测有供电不足的情况,是个例还是普遍存在的问题?