Re: Announce: USB Mode (easy switch to USB host mode)
 

Thank you @pali. Are there instructions for using this module?

Re: Announce: USB Mode (easy switch to USB host mode)
 

You can find something here: http://atrey.karlin.mff.cuni.cz/~pal...o/bq2415x.html

Re: Announce: USB Mode (easy switch to USB host mode)
 

Thank you @pali. Do I understand correctly that if I want to set the charge rate I need to write to /sys/class/power_supply/bq24150-0/current_limit, and the allowed values are 100, 500, 800 and unlimited? (what is this stuff about 1800?) Is there any GUI available or planned to set these values, and/or can I help?

Re: Announce: USB Mode (easy switch to USB host mode)
 

1800 is unlimited. There is no gui. Just open terminal and write values.

Re: Announce: USB Mode (easy switch to USB host mode)
 

Would there be a way to smartly sense incoming power from a dumb charger or add the dumb mode toggle to USB mode in a settings menu? I would love to be able to send the charge from my frankenPalm touchstone charger through the built in chargng system where the N900 hardware/software could manage it rather than using the charging board stuffed inside my Mugen battery cover.
Also probably less scary if the airport security were to open my phone.
http://talk.maemo.org/showthread.php?t=56950

A dumb mode toggle also might make more N900's repairable for USB charging even if they can't use the difficult to repair data lines.

Re: Announce: USB Mode (easy switch to USB host mode)
 

Thank you very much, Pali, for this awesome application.

- With the old h-e-n app, I often had problems enumerating some devices and with this app, it works far better (don't know why, maybe due to the flat delay between vbus boost on and enumeration ?)
- With the old h-e-n app, when trying to enumerate a few different devices in a row, it did a mess with my usb port, disabling it until a reboot. With this app, it doesn't happen anymore, so it seems cleaner.

Anyway, I've spotted a few minor problems.
I still haven't tried "hostmode with charging" as I don't already own an Y USB cable, so the following points are only related to "USB Host mode with boost".

- Sometimes, after enumerating a simple device such as a mouse or a keyboard, I get the message "unable to connect, no file system available".
- The same message always appears when the enumeration fails.
- Hotplug doesn't seem to be handled (even when unplugging and plugging the same device). Is it normal ?
- When unplugging an enumerated device, and plugging a new one, pressing "USB host mode" only says "device already visible in system". I have to go in USB peripheral mode then go again to USB host mode to enumerate the new device.
- I own a D-Link powered USB-Hub : DUB-H7. The enumeration fails about one time out of three (or four). Once associated, it works like a charm (even hotplug). It works powered AND unpowered.
- I own a SD-card reader : Cardette Moshi (which is also a mini unpowered 2-ports USB-hub). The enumeration works but the mount often fails when the SD card is already plugged during enumeration ("unable to connect, no file system available"). I have to remove the SD card and plug it again. The unpowered USB-hub works well (even hotplug)
- When enumerating a full speed device (such as a sd card reader), going through the three speeds turns the device on/off on each change. Couldn't it stress the device a bit and (lightly) shorten it's lifetime ?

If you care about, I have some improvement suggestions :

- Get a new "Peripheral without charging" mode. I often use my phone as an USB key to store files, and I don't like to keep plugged when battery is already at full charge. Being able to connect the phone whitout charging it would be great !
- Handle direct hotplug. Because hotplug is possible through an USB hub, I think it could work directly on the phone too.
- Being able to choose between the three speeds (such as h-e-n) AND automatic detection. If the appropriate speed is already known, directly setting it would speed up enumeration and avoid the usb device to be turned on/off too many times.

Re: Announce: USB Mode (easy switch to USB host mode)
 

You probably don't want to do peripheral without charging, keeping musb_core alive eats a flat 80mA.

Re: Announce: USB Mode (easy switch to USB host mode)
 

Pali, I have tried USB mode with charging with an external HDD and battery pod; I got an error "charger attached" and it refused to allow the connection putting me back in the peripheral mode and charging starts.

Now that I am used to getting connected over 95% of the time using a flash drive (vs ~30% connect on first try with h-e-n) and have a custom swappolube profile for big USB transfers I don't bother with moving big files over wifi anymore.
Kickass work Pali!

Re: Announce: USB Mode (easy switch to USB host mode)
 

Maybe very low charging rate flash drive mode.

Re: Announce: USB Mode (easy switch to USB host mode)
 

I'm not an expert on this subject (and I know many experts able to validate/invalidate my arguments are on this forum), but I have read a Li-Ion battery is supposed to last longer if it runs full charge/discharge cycles.

So I believe that being able to preserve our battery lifetime at the price of changing USB mode every few hours (to charge the battery when it's discharged) would be an improvement.