用于 Raspberry Pi 3 的 Android Things 上的 UART 外设 [英] UART peripherals on Android Things for Raspberry Pi 3

问题描述

如何在适用于 Raspberry Pi 3 的 Android Things 上使用 UART 外设?

似乎默认分配了 linux 控制台.

解决方案

默认情况下，UART 端口映射到 linux 控制台，以防止内核消息干扰您的外设.

您可以使用以下命令从主机上的 SD 卡安装引导分区来禁用控制台:

mount/dev/sdX1/mnt/disk

其中 sdX 替换为您的 sdcard 读卡器设备名称(在将您的 sdcard 插入读卡器后运行 dmesg 应该可以帮助您找出设备名称).

然后编辑/mnt/disk/cmdline.txt以替换以下内核启动参数:

console=serial0,115200

与:

console=tty0

如果您稍后需要重新启用控制台以进行调试，只需添加相同的参数即可.

有关禁用控制台的更多信息，请参阅开发人员文档.>

How do I use UART peripherals on Android Things for Raspberry Pi 3?

It seems that by default it is assigned the linux console.

解决方案

By default the UART port is mapped to the linux console, in order to prevent the kernel message from messing around with your peripheral.

You can disable the console by mounting the boot partition from the sdcard on your host computer using:

mount /dev/sdX1 /mnt/disk

where sdX is replaced with your sdcard reader device name (running dmesg after inserting your sdcard into your reader should help you figure out the device name).

Then edit /mnt/disk/cmdline.txt to replace the following kernel boot argument:

console=serial0,115200

with:

console=tty0

If you need to re-enable the console later for debugging purpose, just add the same argument back.

See the developer docs for more info on disabling the console.

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