Hi Roberto,
I think if you tie the external sync to 1 (so it has no edges), you have to
issue a software sync. You can do this with the man_trig optional argument
of snapshot_get():
roach.snapshot_get('snap_name', man_trig=True)
Hope that helps,
Jack
On Thu, 17 Dec 2015 at 18:58 Roberto F. <rmfuent...@ing.uchile.cl> wrote:
> Hi there,
> I'm working on the ROACH II and came across a problem with the snapshot
> block. I put the snapshots to capture the signal from the ADC (adc5g) usign
> the following configuration:
> -number of samples: 2^16
> -Data width: 64
> - check Start delay support and Use DsP48s to implement counters.
>
> The din comes from a bus of length 64, this are all the samples of one of
> the channels of the ADC appended.
> we and trig ports with a constant set to one.
> This configuration has work but recent it started to througth the
> following error:
> Traceback (most recent call last): File "snap_shot_plot.py", line 254, in
> <module> exit_fail() File "snap_shot_plot.py", line 247, in <module>
> continuePloting = continuous_plot(fpga) File "snap_shot_plot.py", line 163,
> in continuous_plot adc00, adc01, adc10, adc11, adc20, adc21 = get_data()
> File "snap_shot_plot.py", line 65, in get_data hola =
> numpy.array(adc5g.get_snapshot(fpga, "snapshot0")) File
> "/home/roach/Desktop/Roberto/git/ROACH2_ADC5g_Calibration/python/adc5g/tools.py",
> line 31, in get_snapshot grab = roach.snapshot_get(snap_name,
> man_trig=man_trig, wait_period=wait_period) File
> "/usr/local/lib/python2.7/dist-packages/corr/katcp_wrapper.py", line 946,
> in snapshot_get raise RuntimeError("A snap block logic error occurred or it
> didn't finish capturing in the allotted %2.2f seconds. Reported %i bytes
> captured."%(wait_period,bram_size)) RuntimeError: A snap block logic error
> occurred or it didn't finish capturing in the allotted 2.00 seconds.
> Reported 0 bytes captured.
>
> I tried to seek the error out, but the only thing that i came across is
> that the status register in the snapshot block has value 0.
>
> Could someone give me some advice on this matter?
>
> Greatings,
> Roberto Fuentes
>
