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Fix crashing the SPD3303X processor when saving #228

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Fix crashing the SPD3303X processor when saving #228

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57d765c
Added a slow write function. `save.*` now uses the slow write function.
Sep 5, 2025
c2e25c2
Changed aproach to use a lambda and kwarg delay to add an extra 30 ms…
Sep 11, 2025
3969589
Updated timing for `save.*` to be 100 ms because the SPD3303X is junk
Sep 11, 2025
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22 changes: 17 additions & 5 deletions src/fixate/drivers/pps/siglent_spd_3303X.py
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Original file line number Diff line number Diff line change
Expand Up @@ -24,11 +24,11 @@ def __init__(self, instrument):

self.api = [
# Save commands
("save.group1", self.write, "*SAV 1"),
("save.group2", self.write, "*SAV 2"),
("save.group3", self.write, "*SAV 3"),
("save.group4", self.write, "*SAV 4"),
("save.group5", self.write, "*SAV 5"),
("save.group1", self._write_slow, "*SAV 1"),
("save.group2", self._write_slow, "*SAV 2"),
("save.group3", self._write_slow, "*SAV 3"),
("save.group4", self._write_slow, "*SAV 4"),
("save.group5", self._write_slow, "*SAV 5"),
# Recall commands
("recall.group1", self.write, "*RCL 1"),
("recall.group2", self.write, "*RCL 2"),
Expand Down Expand Up @@ -205,6 +205,18 @@ def _write(self, data):
time.sleep(0.02 + len(cmd) / 6000)
self._is_error()

def _write_slow(self, base_str, *args, **kwargs):
"""
The SPD3303X is very slow at saving the current configuration to memory
To correct this, an extra 30 ms is added to the delay between commands.
This function should be identical to _write with the exception of an additional 0.03 s in wait time
"""
cmds = self._format_string(base_str, **kwargs)
for cmd in cmds.split(";"):
self.instrument.write(cmd)
time.sleep(0.02 + len(cmd) / 6000 + 0.03)
self._is_error()

@staticmethod
def _parse_errors(error_response):
"""Parse error string for error code and message
Expand Down
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