can't open /dev/ttyAMA0: No such device or address
今天終於找到了這個問題的緣由。linux 原來我是這樣建立 ttyAMA0 的：sql mknod ttyAMA0 c 204 16這樣建立的問題是 minor number 不是能夠隨意設置的，它有固定的值， 是64. 因此，正確的方法是：code mknod ttyAMA0 c 204 64 咱們能夠在linux 內核代碼 裏找到根據（drivers/tty/serial/amba-pl0
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