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USB hosts hubs transceivers Forum Discussions

Flance_Fang
Level 4
Level 4
50 questions asked 25 sign-ins First comment on KBA

CYUSB3314每个接口都有一对过流检测和外部电源使能控制引脚,这个电源使能控制引脚,能否通过CPU发送特定命令进行主动控制?例如CPU通过HUB的上行USB接口,或者是通过I2C接口,发送特定的控制命令?  目的是为了做这个软件控制,主要是考虑当USB负载出现非过流异常时(例如读写变慢、无法写入等),能够通过CPU主动对负载进行重新上电操作。CatchB9B0(06-20-(06-24-10-30-48).jpg这个不知道HUB是否能够实现?

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YangyangC_06
Employee
Employee
50 likes received 25 likes received 10 likes received

Hi Flance,

你可以尝试发送 USB 的标准命令, PORT_RESET 去复位 HUB 的某个下行口。

参考USB3.1 spec 10.16.2.10 Set Port Feature

BaiduShurufa_2019-6-24_13-50-16.bmp

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YangyangC_06
Employee
Employee
50 likes received 25 likes received 10 likes received

Hi Flance,

你可以尝试发送 USB 的标准命令, PORT_RESET 去复位 HUB 的某个下行口。

参考USB3.1 spec 10.16.2.10 Set Port Feature

BaiduShurufa_2019-6-24_13-50-16.bmp

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