I am working with the Android version of Subsurface desktop and
attempting download of dive logs from a FTDI dive computer.
Hardware issues:
Firstly, the Tusa does not turn into PC download mode if the USB bus
does not supply power. Possibly on this phone the mini-USB plug does not
supply power to devices. Therefore, connect the Android USB plug to a
USB hub that supplies power to all connected devices. This connection
actually is via mini-USB to full-sized US cable, through a female/female
USB adaptor-plug and another cable to the USB hub. The Tusa DC USB plug
is plugged into the USB hub via yet another cable. With this setup, at
least, the Tusa DC goes into download mode.
Secondly tested most of this cable setup by download onto the Linux
desktop using the custom FTDI driver and using the USB hub to supply
power to the Tusa DC. Download works perfectly (i.e. with some
ideosyncracies that Anton has already seen, dealing with cylinder gas
composition, maybe a libdivecomputer issue. These are not relevant now).
Fact is download works well onto Linux.
Android driver configuration:
When downloading dives onto the Anfroid device, I get an error message
"Insufficient privileges to open the device ftdi Tusa (Zen (IQ-900))".
This is the same error message that I get if downloading to Linux and I
have not chown-ed the USB port or I did not build Subsurface-desktop
with -DFTDISUPPORT=ON on the cmake command line. This does not
necessarily mean that on Android it is exactly the same reason as on
Linux. In android/build.sh, it looks like FTDISUPPORT is pretty much
hard-wired into the cmake command line. Possibly the Android port also
needs some configuration, for instance performed using chown on Linux?
Any comments?
Kind regards,
willem
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