Builds started to fail because v2.2.2 (about 18 months old) couldn't be
found anymore. That issue seems to have been fixed, but it was a good
reminder not to get completely disconnected from upstream here.
This switches things to the currently latest version of the Android USB
library (which coincidentally will also provide support for additional
USB-serial chipset - not that I think that any dive computers will
benefit from that).
Some of the interfaces changed in the upstream Java library and our code
had to be adjusted to accomodate this.
Signed-off-by: Dirk Hohndel <dirk@hohndel.org>
Android takes some pretty hard measures to save power, including
shutting down the CPU. Since this can interfer with the download from an
usb serial device, we now use a wakelock to keep the CPU running during
download.
Signed-off-by: Christof Arnosti <charno@charno.ch>
Signed-off-by: Dirk Hohndel <dirk@hohndel.org>
This commit contains the serial_android_usb part of the changes proposed
in issue #2657.
What's implemented:
- A data structure that contains all the data that can be used to
describe an usb device (including user-facing string).
- A function to get a list of all attached usb devices (optionally with
selectable driver class).
- Changes in the serial_android_usb_open-function and in the Java part
to use the information about the usb device and optionally selected
driver when connecting.
This commit keeps compatibility with the current UI-Code in the case
that only one USB-Device is connected. If two devices are connected,
only the first one is tried.
There are still some small things to do:
- Change the user-facing string to something more descriptive.
- Parts which aren't uesd anymore when the UI-Part is implemented are
simply marked as obsolete (to keep compatibility for now).
But generally it seems to work.
[Dirk Hohndel: some white space / coding style adjustments]
Signed-off-by: Christof Arnosti <charno@charno.ch>
Signed-off-by: Dirk Hohndel <dirk@hohndel.org>
Since the Android USB stack and subsequently the usb-serial-for-android
driver have problems with read-timeouts, the read-timeout is now
implemented in AndroidSerial.java. Also, DC_STATUS_TIMEOUT is returned
if there are less bytes returned than expected.
Different chipsets seem to behave differently with
usb-serial-for-android. On CP210x the read blocks until there is some
data here, but on FTDI the chip seems to return whatever is currently in
the buffer (so 0 bytes if the buffer is empty). This different behaviour
should be mitigated by the changes by this commit.
Signed-off-by: Christof Arnosti <charno@charno.ch>
Implement the libdivecomputer API in Java and create C/JNI translation
layer.
[Dirk Hohndel: whitespace harmonization - yes, some of this is Java,
this still makes it much easier to read for me;
also changed the FTDI conditional compilation to make
sure we can still use that for mobile-on-desktop if
necessary]
Signed-off-by: Christof Arnosti <charno@charno.ch>
Signed-off-by: Dirk Hohndel <dirk@hohndel.org>
