Android Question IOIO Stream has been closed

[rosippc64a]

Hi Guys,
I read a lof of articles about this problem, but there wasn't answer what would be good for me.
I use a diy ioio with a serially connected rfid reader. I use a home made b4a (b4x.com) program. Te rfid reader reads 13bytes in each 5 seconds, repeatedly.
When I use this with android 4.2, and ADB (usb debugger on), IOIO 1.4 and IOIOib, it works fine. When I use it with android 4.4 or 5.01 (both tested), IOIO 2.05 lib, open accessory, usb debugger off, then after 10-20 readings the same program hangs with 'Stream has benn closed'. I verified, the rfid reader reads further and sends its signal, but the stream is closed... I don't close this stream anywhere, and I can't figure out what is the reason of this error. The ioio firmware is the latest of course.
I don't thought somebody will say which row of source program is faulty, just a question if someone met such a problem: it is a hardware or software issue ?
best regards
Steve

 

[ecastelli201]

Thread is closed with success. I made a my own library (thanks Kolbe) where these streams is situated in this, not in b4a program. From this there is no such an error.

Hi,
I have your same problem with UART, but not only: also toggling LED ON/OFF with a timer, after a "number" of cycles the execution stops showing an "EBADF (bad file number) write" error.
I tried slowing the timer, making a service, but results are near the same.
I think there is a timing problem (not a memory or buffersize problem) anywhere in the lib.
How did you solve ?
Thank you,
enrico

 

[rosippc64a]

Hi,
in the original approach the streams was manage in the b4a level. There had to declare and manage them. Im my solution this is in my java library and I did such a methods what do their task in it.
Since then I have no problem with it.
Steven

 

[ecastelli201]

Hi,
in the original approach the streams was manage in the b4a level. There had to declare and manage them. Im my solution this is in my java library and I did such a methods what do their task in it.
Since then I have no problem with it.
Steven

I am working with AndroidStudio to do your same work, but is my first time with Java and my head is burning. I succeed in TX and RX with UART, in Input and output with digital pins, but I have to convert my work in a Lib.
May you help me ?
enrico

 

[rosippc64a]

Hi Enrico,
yes I can help you. This lib was also my first work, I felt the same. But: I work with eclipse because for me the android studio is much more complicated and I read here more help about eclipse than AS. What kind of help do you need? I can give you my whole source code too, if you would.
Steven

 

[ecastelli201]

Hi Enrico,
yes I can help you. This lib was also my first work, I felt the same. But: I work with eclipse because for me the android studio is much more complicated and I read here more help about eclipse than AS. What kind of help do you need? I can give you my whole source code too, if you would.
Steven

Thank You,
I have also eclipse and if you want to send me your working code I will study it.
enrico

 

[rosippc64a]

Hi Enrico,
here is my source. this isn't a zip, I had to rename my .java file to upload
Steven

 

[rosippc64a]

Beware of Enrico, this source works in accessory mode, usb debug off!

 

[ecastelli201]

Hi Enrico,
here is my source. this isn't a zip, I had to rename my .java file to upload
Steven

Thank You !
Now I download and study.
OK for Accessory and debug.

 

[ecastelli201]

Thank You !
Now I download and study.
OK for Accessory and debug.

Hi Steven,
hardly I succeeded in importing your code in Eclipse (I never used it since yesterday) and generating a .Jar and .xml file.
Then I put these 2 files into Library folder of B4A and I wrote a two lines code in B4A after flagging the new library:

Dim IOIO as myIOIO
and
IOIO connect("IOIOconn")

Compilation OK, installation on device OK.
Running the app, device shows: "unfortunately B4AExample has stopped"
Error is caused by "connect": if I only instantiate the libray, nothing happens.
Have I to write something in Manifest and/or to place files somewhere in the project ?

Thank you again,
enrico

 

[rosippc64a]

Hi Enrico,
this source was only to study. There is missing a big part from this, the ioio lib part what I copy from official ioio lib. I don't know what size of attachment I can upload, but if you send an email to here: rostasc3 at gmail dot com, I will send the whole eclipse project.
Steven

 

[ecastelli201]

Hi Enrico,
this source was only to study. There is missing a big part from this, the ioio lib part what I copy from official ioio lib. I don't know what size of attachment I can upload, but if you send an email to here: rostasc3 at gmail dot com, I will send the whole eclipse project.
Steven

OOOhhh,
finally I have a working lib: now UART reads and writes without any problem: I shorted RX and TX pins and with a 100 ms timer I send a string with "SHOTS" count.
Now shots are about 50000 and it continues to work.
Than I made two new methtods: to set and reset a digital output and to read a digital input. (during UART activity)
No problem.
Thank you again, Steven.
enrico

 

[rosippc64a]

With pleasure Enrico, I am glad to hear so good news!
Steven

 

[lecoeur]

Hi Enrico,
this source was only to study. There is missing a big part from this, the ioio lib part what I copy from official ioio lib. I don't know what size of attachment I can upload, but if you send an email to here: rostasc3 at gmail dot com, I will send the whole eclipse project.
Steven

dear All i have th esame problem, is it possible to send me the new library . Many thanks by advance
Jean-Marc My email :lecoeurjeamarc@gmail.com