Eye scan support #518
Eye scan support #518
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Signed-off-by: Travis F. Collins <[email protected]>
Signed-off-by: Travis F. Collins <[email protected]>
Signed-off-by: Travis F. Collins <[email protected]>
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Generated documentation for this PR is available at Link |
adi/jesd_internal.py
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| lanes = {} | ||
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| def get_eye_data(self, lanes=None): |
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Not sure if this belongs into jesd_internal
This is a MxFE side JRX eye_scan and is specific to MxFE...
I would assume this should go into ad9081.py?
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I reorganized the inheritance so this will be only pulled in by MxFE
adi/jesd_internal.py
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| _jesd_es_duration_ms = 100 | ||
| _jesd_prbs = 7 | ||
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| _half_rate = {"mode": "Half Fate", "scale": 0.004} |
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Let's scale to mV for half rate the API already scales things.
So here we use 1.0
adi/jesd_internal.py
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| _jesd_prbs = 7 | ||
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| _half_rate = {"mode": "Half Fate", "scale": 0.004} | ||
| _quarter_rate = {"mode": "Quarter Rate", "scale": 0.001} |
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For quarter rate we need to scale until the API updates the next time.
So scale should be 4.0 here
adi/jesd_internal.py
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| graph_helpers = { | ||
| "xlim": [-info[1] / 2, info[1] / 2 - 1], | ||
| "xlabel": "SPO", | ||
| "ylabel": "EYE Voltage (V)", |
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| eye_data_per_lane = dev._jesd.get_eye_data() | ||
| num_lanes = len(eye_data_per_lane.keys()) | ||
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I updated the driver to return -EINVAL if a physical lane is not used (virtually mapped)
So we could do:
def get_mapped_lanes(lanes):
mapped_lanes = []
for lane in lanes:
try:
dev._ctrl.debug_attrs["bist_2d_eyescan_jrx"].value = f"{lane} 7 1"
mapped_lanes.append(lane)
except:
continue
return mapped_lanes
all_lanes = ['0', '1', '2', '3', '4', '5', '6', '7']
lanes = get_mapped_lanes(all_lanes)
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I added some pieces around this. There was some confusion around the link naming in sysfs which always goes 0,1,2,... N which is not the actual lanes mapped index. This is handled now
Signed-off-by: Travis F. Collins <[email protected]>
Signed-off-by: Travis F. Collins <[email protected]>
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Signed-off-by: Travis F. Collins <[email protected]>
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Add JESD eye scan helper functions and add JESD debug support to AD9081.