Blacklist STC8G series

stcgal may brick these untested MCUs.

Fixes #63.

stcgal/models.py

@@ -1143,10 +1143,18 @@ class MCUModelDatabase:
         MCUModel(name='IAP15L14AD', magic=0xd4de, total=14336, code=14336, eeprom=0),
     )
 
+    @classmethod
+    def check_model(self, model):
+        # User reported bricked MCUs, GH #63
+        if model.name.startswith("STC8G"):
+            raise ValueError("MCU model {} is blacklisted".format(model.name))
+
     @classmethod
     def find_model(self, magic):
         for model in self.models:
-            if model.magic == magic: return model
+            if model.magic == magic:
+                self.check_model(model)
+                return model
         raise NameError
 
     @classmethod

stcgal/protocols.py

@@ -214,6 +214,8 @@ class StcBaseProtocol(ABC):
             print(msg, file=sys.stderr)
             self.model = MCUModelDatabase.MCUModel(name="UNKNOWN",
                 magic=self.mcu_magic, total=63488, code=63488, eeprom=0)
+        except ValueError as ex:
+            raise StcProtocolException(ex)
 
         # special case for duplicated mcu magic,
         #   0xf294 (STC15F104W, STC15F104E)