Re-enumerating a device

[Daniel O'Connor]

On Wed, 16 Dec 2009, Hans Petter Selasky wrote:
> > It takes about a second to run though..
>
> Could you also check the number of configurations ?
>
> usbconfig -u 0 -a 2 reset
>
> usbconfig -u 0 -a 2 dump_device_desc dump_curr_config_desc

Sigh, I dunno what I was doing wrong before but now it works!
[inchoate 10:59] ~ >sudo dfu-util -D ~/ma004103.bin -t 256 -R
dfu-util - (C) 2007-2008 by OpenMoko Inc.
This program is Free Software and has ABSOLUTELY NO WARRANTY

Opening USB Device 0x0000:0x0000...
Claiming USB DFU Runtime Interface...
Determining device status: state = dfuIDLE, status = 0
WARNING: Runtime device already in DFU state ?!?
Found Runtime: [0x0763:0x2804] devnum=0, cfg=0, intf=0, alt=0, name="RAM"
Claiming USB DFU Interface...
Setting Alternate Setting ...
Determining device status: state = dfuIDLE, status = 0
dfuIDLE, continuing
Transfer Size = 0x0100
bytes_per_hash=120
Starting download: [##################################################] finished!
state(7) = dfuMANIFEST, status(0) = No error condition is present
state(2) = dfuIDLE, status(0) = No error condition is present
Done!
can't detach: Unknown error
Resetting USB to switch back to runtime mode

> Seems like your device is broken then. Does the same procedure work
> on Linux?

I think it works in Linux, it definitely does in Windows.

It uses a Ti TAS1020A (http://www.ti.com/lit/gpn/tas1020a) connected to an
AK4532VF (http://www.asahi-kasei.co.jp/akm/en/product/ak4532/ak4532.html)

Interestingly it does have a 24LC64 (64kbit I2C EEPROM) but I think it
only has the header data for whatever reason so it always comes up in
DFU mode.

Sorry for wasting your time :(

-- 
Daniel O'Connor software and network engineer
for Genesis Software - http://www.gsoft.com.au
"The nice thing about standards is that there
are so many of them to choose from."
  -- Andrew Tanenbaum
GPG Fingerprint - 5596 B766 97C0 0E94 4347 295E E593 DC20 7B3F CE8C
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