Re: USB 2.0 ports not working

"Mario" <trapule@xxxxxxxxxxxxxx> wrote in
news:1172846718.682322.120530@xxxxxxxxxxxxxxxxxxxxxxxxxxx:

[...]
In both cases the device has been recognized as mass storage
device, the partition manager had regognized a FAT partition and
loaded the fat filesystem driver, so i seems that the device is
exchanging USB data with the OS.
It seems that FAT was not able to mount it as a volume.
Did you used the same USB disk in both tests?


Si'.... :-)

Try to enable the debug zones of the different modules involved in
the detect process (the USB host driver, USBDISK, MSPART, FATFS,
DISKCACHE) to understand where and when the disk intitialization
process locks.
If the host controller seems to stop replying to the system it may
be that its interrupt is not serviced. This usually happens when you
connect devices that use level-based IRQs (the USB host) to
processors sensitive only to front-based IRQs (or configured to
recognize fronts on the pin where the host controller is connected).
In this case the host controller will keep it's interrupt line low
(or high) to indicate that another interrupt request is pending but
the microprocessor won't sense a front and won't start the interrupt
handling routine.
On which kind of hardware are you working?

P.S. ovviamente parlo italiano, però qui credo sia meglio rispondere
in inglese per dare anche ad altri la possibilità di capire (per
quanto consentito dal mio pessimo inglese) o di trovare questi
messaggi cercando negli archivi di google.
Se servono altre info, l'e-mail è quasi valido.

--
Valter Minute
(the reply address of this message is invalid)
(l'indirizzo di reply di questo messaggio non è valido)
.

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