can't open /dev/ttyAMA0: No such device or address
今天终于找到了这个问题的缘由。linux 原来我是这样建立 ttyAMA0 的：sql mknod ttyAMA0 c 204 16这样建立的问题是 minor number 不是能够随意设置的，它有固定的值， 是64. 因此，正确的方法是：code mknod ttyAMA0 c 204 64 咱们能够在linux 内核代码 里找到根据（drivers/tty/serial/amba-pl0
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