# Change GPIO controller to SPI
         Pin.ft232h_gpio = self._spi.get_gpio()
 
-    # pylint: disable=too-many-arguments
+    # pylint: disable=too-many-arguments,unused-argument
     def init(
         self,
         baudrate=100000,
             chunk_end = chunk_start + self._spi.PAYLOAD_MAX_LENGTH
             self._port.write(buf[chunk_start:chunk_end])
         if rest:
-            self._port.write(buf[-1 * rest :])
+            rest_start = start + chunks * self._spi.PAYLOAD_MAX_LENGTH
+            self._port.write(buf[rest_start:end])
 
     # pylint: disable=unused-argument
     def readinto(self, buf, start=0, end=None, write_value=0):