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Fix multi message iso tp requests

master
Willem Melching 2020-05-18 19:48:47 -07:00
parent 0610ed1e25
commit 5307bf7277
1 changed files with 2 additions and 2 deletions
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4
python/uds.py
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@ -372,7 +372,7 @@ class IsoTpMessage():
self._tx_first_frame()
def _tx_first_frame(self) -> None:
if self.tx_len < 8:
if self.tx_len < self.max_len:
# single frame (send all bytes)
if self.debug: print("ISO-TP: TX - single frame")
msg = (bytes([self.tx_len]) + self.tx_dat).ljust(self.max_len, b"\x00")
@ -380,7 +380,7 @@ class IsoTpMessage():
else:
# first frame (send first 6 bytes)
if self.debug: print("ISO-TP: TX - first frame")
msg = (struct.pack("!H", 0x1000 | self.tx_len) + self.tx_dat[:6]).ljust(self.max_len, b"\x00")
msg = (struct.pack("!H", 0x1000 | self.tx_len) + self.tx_dat[:self.max_len - 2]).ljust(self.max_len - 2, b"\x00")
self._can_client.send([msg])
def recv(self) -> bytes: