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64 lines
2.2 KiB
64 lines
2.2 KiB
#!/usr/bin/env python
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import os
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import sys
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import jinja2
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from collections import Counter
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from common.dbc import dbc
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if len(sys.argv) != 3:
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print "usage: %s dbc_path struct_path" % (sys.argv[0],)
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sys.exit(0)
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dbc_fn = sys.argv[1]
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out_fn = sys.argv[2]
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template_fn = os.path.join(os.path.dirname(__file__), "dbc_template.cc")
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can_dbc = dbc(dbc_fn)
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with open(template_fn, "r") as template_f:
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template = jinja2.Template(template_f.read(), trim_blocks=True, lstrip_blocks=True)
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msgs = [(address, msg_name, msg_size, sorted(msg_sigs, key=lambda s: s.name not in ("COUNTER", "CHECKSUM"))) # process counter and checksums first
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for address, ((msg_name, msg_size), msg_sigs) in sorted(can_dbc.msgs.iteritems()) if msg_sigs]
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def_vals = {a: set(b) for a,b in can_dbc.def_vals.items()} #remove duplicates
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def_vals = [(address, sig) for address, sig in sorted(def_vals.iteritems())]
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if can_dbc.name.startswith("honda") or can_dbc.name.startswith("acura"):
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checksum_type = "honda"
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checksum_size = 4
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elif can_dbc.name.startswith("toyota") or can_dbc.name.startswith("lexus"):
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checksum_type = "toyota"
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checksum_size = 8
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else:
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checksum_type = None
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for address, msg_name, msg_size, sigs in msgs:
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for sig in sigs:
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if checksum_type is not None and sig.name == "CHECKSUM":
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if sig.size != checksum_size:
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sys.exit("CHECKSUM is not %d bits longs %s" % (checksum_size, msg_name))
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if checksum_type == "honda" and sig.start_bit % 8 != 3:
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sys.exit("CHECKSUM starts at wrong bit %s" % msg_name)
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if checksum_type == "toyota" and sig.start_bit % 8 != 7:
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sys.exit("CHECKSUM starts at wrong bit %s" % msg_name)
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if checksum_type == "honda" and sig.name == "COUNTER":
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if sig.size != 2:
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sys.exit("COUNTER is not 2 bits longs %s" % msg_name)
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if sig.start_bit % 8 != 5:
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sys.exit("COUNTER starts at wrong bit %s" % msg_name)
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# Fail on duplicate message names
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c = Counter([msg_name for address, msg_name, msg_size, sigs in msgs])
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for name, count in c.items():
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if count > 1:
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sys.exit("Duplicate message name in DBC file %s" % name)
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parser_code = template.render(dbc=can_dbc, checksum_type=checksum_type, msgs=msgs, def_vals=def_vals, len=len)
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with open(out_fn, "w") as out_f:
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out_f.write(parser_code)
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