>>>>> "Anton" == Anton A Litvinov <mirteney@xxxxxxxxx> writes:
...
Anton> Thought the number 8 seems "magic" for me. For example changing
Anton> it to 12 leads to rare callback invocation and to floating point
Anton> exception
Anton> Core was generated by `./test3'. Program terminated with signal
Anton> 8, Arithmetic exception. [New process 7272] #0
Anton> 0x00007f8977a14c0a in ftdi_readstream_cb (transfer=0x19da9c0) at
Anton> /home/anton/src/libftdi-1.0-HEAD-b013bcb/src/ftdi_stream.c:75 75
Anton> int numPackets = (length + packet_size - 1) / packet_size;
Can you give more background, like what OS, what libusb-1 version etc.
On a first rough test serveral runs with "12" on my hardware (FT2232H in
sync fifo mode, libusb-1_0-0-1.0.6-17.1.x86_64, linux) didn't result in a
crash.
Perhaps run in gdb and when you hit the error type "p length<CR>p
packet_size <CR>" and give us the returned numbers.
The numbers where taken from the original fastftdi code.
Bye
--
Uwe Bonnes bon@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
Institut fuer Kernphysik Schlossgartenstrasse 9 64289 Darmstadt
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