can't open /dev/ttyAMA0: No such device or address
来源：互联网 发布：centos测速 编辑：程序博客网 时间：2024/05/16 18:54
今天终于找到了这个问题的原因。
原来我是这样创建 ttyAMA0 的：
mknod ttyAMA0 c 204 16这样创建的问题是 minor number 不是可以随意设置的，它有固定的值， 是64.
所以，正确的方法是：
mknod ttyAMA0 c 204 64
我们可以在linux 内核代码 里找到根据（drivers/tty/serial/amba-pl011.c）：
#define SERIAL_AMBA_MAJOR 204#define SERIAL_AMBA_MINOR 64
顺便说一下， AMA是 Advanced Microcontroller Bus Architecture的缩写，是ARM的一款 UART设备（ARM AMBA PL011）
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