buildcommands: Extend number of available mcu messages from 96 to 128

Some internal code treats the message ids as encoded "variable length
quantities", while other internal code assumes the message id is
always one byte long.  Continue using this scheme, but convert the VLQ
users to use the name "msgtag" while the 1-byte users use "msgid".
Increase the number of available msgids from 96 to 127 - the higher
values get encoded as negative "msgtags".

Signed-off-by: Kevin O'Connor <kevin@koconnor.net>

1 files changed, 8 insertions, 5 deletions

diff --git a/klippy/msgproto.py b/klippy/msgproto.py
index d1f461b8..c3c0cda9 100644
--- a/klippy/msgproto.py
+++ b/klippy/msgproto.py
@@ -357,14 +357,17 @@ class MessageParser:
                 start_value, count = value
                 for i in range(count):
                     enums[enum_root + str(start_enum + i)] = start_value + i
-    def _init_messages(self, messages, command_ids=[], output_ids=[]):
-        for msgformat, msgid in messages.items():
+    def _init_messages(self, messages, command_tags=[], output_tags=[]):
+        for msgformat, msgtag in messages.items():
             msgtype = 'response'
-            if msgid in command_ids:
+            if msgtag in command_tags:
                 msgtype = 'command'
-            elif msgid in output_ids:
+            elif msgtag in output_tags:
                 msgtype = 'output'
-            self.messages.append((msgid, msgtype, msgformat))
+            self.messages.append((msgtag, msgtype, msgformat))
+            if msgtag < -32 or msgtag > 95:
+                raise error("Multi-byte msgtag not supported")
+            msgid = msgtag & 0x7f
             if msgtype == 'output':
                 self.messages_by_id[msgid] = OutputFormat(msgid, msgformat)
             else: