Cockpit/red Pitaya drops digital lines above 8 in experiments.

[iandobbie]

Discovered in issue #708 but the root cause is either cockpit or red pitaya dropping digital lines above 8 but only in experiments. Here is the first few lines of action table in cockpit.... experiment.lastExperiment.table 0.00 2 zPiezo 60.32477613223105 0.00 488 True 0.00 East-Green True 0.10 East-Green False 100.00 488 False 100.00 2 zPiezo 60.32477613223105 100.05 2 zPiezo 61.82477613223105

And from the redpitaya. line 4 is the laser, -1 is the analogue z stage, camera should be 9.

0 4 1 0 -1 2246.0 100000000 4 0 100050000 -1 2301.8477

The camera trigger just inst there. I wonder is somethig is assuming 8 digital lines as the camera is pin 9, whereas the laser is pin 4.

[iandobbie]

Red Pitaya code has....

    digital_diff = digital_state ^ wanted_digital_state
    for line in range(8):
        if (digital_diff >> line) & 0b1:
            action = (wanted_digital_state >> line) & 0b1
            runner_table.append((current_t, line, action))
    digital_state = wanted_digital_state

I think this is the fault.

[iandobbie]

Replacing 8 with 16 in the range function above fixes the issue,

[iandobbie]

Don't know where we should leave this fix but it is required as the issue is very strange. Especially as Chris has labelled the output on the Red Pitaya very strangely.

[iandobbie]

This is completely an issue with the red pitaya code and should be fixed there but is definitely not a cockpit issue so closing this here