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comm_analyzer: add decode_dump_header, decode_dump_body

This commit is contained in:
Simon Renblad 2024-01-08 16:14:39 +08:00
parent 669edf17c5
commit c93409546e
1 changed files with 18 additions and 9 deletions
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25
artiq/coredevice/comm_analyzer.py
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@ -107,11 +107,17 @@ def decode_dump(data):
data = data[1:]
# only header is device endian
# messages are big endian
parts = struct.unpack(endian + "IQbbb", data[:15])
(sent_bytes, total_byte_count,
error_occurred, log_channel, dds_onehot_sel) = parts
payload_length = struct.unpack(endian + "I", data[:4])[0]
data = data[4:]
args = decode_dump_header(endian, payload_length, data)
return decode_dump_payload(*args)
expected_len = sent_bytes + 15
def decode_dump_header(endian, payload_length, data):
parts = struct.unpack(endian + "Qbbb", data[:11])
(total_byte_count, error_occurred, log_channel, dds_onehot_sel) = parts
expected_len = payload_length + 11
if expected_len != len(data):
raise ValueError("analyzer dump has incorrect length "
"(got {}, expected {})".format(
@ -119,13 +125,16 @@ def decode_dump(data):
if error_occurred:
logger.warning("error occurred within the analyzer, "
"data may be corrupted")
if total_byte_count > sent_bytes:
if total_byte_count > payload_length:
logger.info("analyzer ring buffer has wrapped %d times",
total_byte_count//sent_bytes)
total_byte_count // payload_length)
return payload_length, data[11:], log_channel, dds_onehot_sel
position = 15
def decode_dump_payload(payload_length, data, log_channel, dds_onehot_sel):
position = 0
messages = []
for _ in range(sent_bytes//32):
for _ in range(payload_length // 32):
messages.append(decode_message(data[position:position + 32]))
position += 32
return DecodedDump(log_channel, bool(dds_onehot_sel), messages)