Editing N900 Hardware USB Host
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*If the supply is a charger (D+,D- short, detected by the 1707a), fast charge. | *If the supply is a charger (D+,D- short, detected by the 1707a), fast charge. | ||
*Attempt to enumerate as a device, if this succeeds (including handling of suspended busses), then enumerate and charge as a device, respecting the enumerated current. | *Attempt to enumerate as a device, if this succeeds (including handling of suspended busses), then enumerate and charge as a device, respecting the enumerated current. | ||
- | *If both enumeration as a device and charger detection have failed, we may be plugged into a hub or device with reverse power. Attempt to enumerate connected devices (=hostmode. Will not work due to [probably hardware] limitations in hostmode, which block speed selection after VBUS got applied). Charge at user-defined maximum current. For example - may be a 500mA power supply also supplying the hub and a keyboard = 2 unit loads - max draw = 300mA | + | *If both enumeration as a device and charger detection have failed, we may be plugged into a hub or device with reverse power. Attempt to enumerate connected devices (=hostmode. Will not work due to [probably hardware] limitations in hostmode, which block speed selection after VBUS got applied). Charge at user-defined maximum current. For example - may be a 500mA power supply also supplying the hub and a keyboard = 2 unit loads - max draw = 300mA. |
==Installation== | ==Installation== |
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