Hi there Gurus of Software Defined Radio Heaven,
I have been trying to get pySerial and GNU Radio to work together but only
with limited success. The goal is to read data from a serial connection,
say '/dev/ttyUSB0', and use it to calculate the bit error rate.
I'm using pySerial in GNU Radio the following way,
[...]
self.ser = serial.Serial('/dev/ttyUSB0')
self.src = gr_file_descriptor_source(gr.sizeof_char, self.ser.fileno(),
False)
[...]
If I put a self.ser.readline() in there somewhere (before calling Run())
the next line is read correctly from the serial connection.
When I connect a file_descriptor_source with both a file_sink and a
scope_sink the result is that the file contains the correct data, no
problem, but the scope_sink just never gets updated. No errors, no
nothing. When I change the repeat parameter to true, I get a 'lseek'
Invalid seek error.
Any ideas on how to get it working?
- Martin
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