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I2c bus number and video node/zh
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Revision as of 13:45, 27 February 2022
494 bytes added
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13:45, 27 February 2022
→google Coral board
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==== google Coral board ====
==== google Coral board ====
i2c序号为1。
i2c序号为1。
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=== 工具软件 ===
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下面的两个命令行工具可以辅助理解和查找问题。
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==== i2cdetect ====
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在linux命令下,执行以下命令来探测i2c总线上的所有i2c设备地址。通常情况下,我们的模块地址是0x3b。
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<code>i2cdetect -y -r [busnumber]</code>
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==== dmesg ====
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dmesg可以打印出linux kernel启动阶段的日志,也包括我们摄像机模组的驱动日志。仔细观察可以看到启动阶段的i2c probe流程以及是否成功的信息。
== /dev/video设备节点的说明 ==
== /dev/video设备节点的说明 ==
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