Mask out FCS bits from system connection byte

In compliance with updated Cortex Flashing Specification. Fixes #31 and issue raised by @BottomNotch
purduesigbots · Mar 5, 2017 · 870d3be · 870d3be
1 parent 21230ce
commit 870d3be
Showing 1 changed file with 2 additions and 1 deletion.
diff --git a/prosflasher/upload.py b/prosflasher/upload.py
@@ -164,7 +164,8 @@ def ask_sys_info(port, ctx=proscli.utils.State(), silent=False):
             if response[10] > 5:  # anything smaller than 5 is probably garbage from ADC
                 sys_info.backup_battery = response[10] * 0.059
             try:
-                sys_info.connection_type = ConnectionType(response[11])
+                # Mask FCS bits out of response[11]
+                sys_info.connection_type = ConnectionType(response[11] & 0b00110011)
             except ValueError:
                 sys_info.connection_type = ConnectionType.unknown
             sys_info.previous_polls = response[13]