Timeline for How can I use a greater USB charge current without device enumeration?
Current License: CC BY-SA 3.0
9 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Dec 18, 2014 at 18:24 | vote | accept | bitsmack | ||
| Oct 29, 2014 at 5:18 | answer | added | user57037 | timeline score: 3 | |
| Oct 29, 2014 at 3:02 | comment | added | Chris Stratton | No, a hub is most definetely NOT the solution (the resistor detection wouldn't work through it anyway). Do the sensing with your stm32 instead. | |
| Oct 28, 2014 at 22:37 | comment | added | Majenko | @bitsmack What would be ideal would be a charge chip with built in resistance sensing, but not enumeration, so it can sense the 200Ω without interfering with the USB comms to the MCU. | |
| Oct 28, 2014 at 22:29 | comment | added | bitsmack | @Majenko-notGoogle Good point. I hope there's an easier way :) | |
| Oct 28, 2014 at 22:27 | comment | added | bitsmack | @IgnacioVazquez-Abrams Thanks! I'll generally be connecting to a Dedicated Charge Port, which is detected by looking for the 200-Ohm connection between D+ and D- (not by enumeration). I was hoping there was some charge-management solution that didn't require me to build the sensing circuitry into the USB path. | |
| Oct 28, 2014 at 22:01 | comment | added | Majenko | " I assume they can't be placed in parallel with the data communications path." Nope - think again. You'd need to embed a USB hub in there to share the USB port. | |
| Oct 28, 2014 at 21:40 | comment | added | Ignacio Vazquez-Abrams | Why can't you have the MCU perform enumeration and then go to sleep? | |
| Oct 28, 2014 at 21:37 | history | asked | bitsmack | CC BY-SA 3.0 |