Anonymous
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Feb 19, 2016
12:31 PM
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Feb 19, 2016
12:31 PM
I understand I set the requested USB power levels in the configuration descriptors.
My FX3 has a requirement to turn on some additional hardware once the requested power levels are granted: how do I tell when that has happened?
Are there events/callbacks for that, or can I read certain registers for it?
1 Reply
Anonymous
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Feb 22, 2016
04:18 AM
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Feb 22, 2016
04:18 AM
Paul,
Yes, the required power should be specified in the configuration descriptors. Generally once FX3 is enumerated it can draw the requested power from the host.
You can register a callback in the firmware when you receive a SET_CONF request from the host. In handling that callback you can provide the power to the external hardware.
Regards
Dhritiman