Fixed the writeto_then_readfrom() in a better way.

 I notice that the stop was removed from writeto() for a reason, so instead of adding it back I just call _write() instead.

Author: wolfmanjm

adafruit_bitbangio.py

@@ -114,12 +114,12 @@ def scan(self):
                     found.append(address)
         return found
 
-    def writeto(self, address, buffer, *, start=0, end=None, stop=True):
+    def writeto(self, address, buffer, *, start=0, end=None):
         """Write data from the buffer to an address"""
         if end is None:
             end = len(buffer)
         if self._check_lock():
-            self._write(address, buffer[start:end], stop)
+            self._write(address, buffer[start:end], True)
 
     def readfrom_into(self, address, buffer, *, start=0, end=None):
         """Read data from an address and into the buffer"""
@@ -150,7 +150,7 @@ def writeto_then_readfrom(
         if in_end is None:
             in_end = len(buffer_in)
         if self._check_lock():
-            self.writeto(address, buffer_out, start=out_start, end=out_end, stop=False)
+            self._write(address, buffer[out_start:out_end], False)
             self.readfrom_into(address, buffer_in, start=in_start, end=in_end)
 
     def _scl_low(self):