Merge pull request #449 from caternuson/pico_u2if

[Adafruit_Blinka-hackapet.git] / src / adafruit_blinka / microcontroller / ft232h / spi.py

diff --git a/src/adafruit_blinka/microcontroller/ft232h/spi.py b/src/adafruit_blinka/microcontroller/ft232h/spi.py
index afdf3140c5374933f2d9ab6328228f3e385615e4..c768eaf8b87d960990feff26a308890a2a4520c5 100644 (file)
--- a/src/adafruit_blinka/microcontroller/ft232h/spi.py
+++ b/src/adafruit_blinka/microcontroller/ft232h/spi.py
@@ -60,13 +60,15 @@ class SPI:
             chunk_end = chunk_start + self._spi.PAYLOAD_MAX_LENGTH
             self._port.write(buf[chunk_start:chunk_end])
         if rest:
             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):
         """Read data from SPI and into the buffer"""
         end = end if end else len(buf)
 
     # pylint: disable=unused-argument
     def readinto(self, buf, start=0, end=None, write_value=0):
         """Read data from SPI and into the buffer"""
         end = end if end else len(buf)

-        result = self._port.read(end - start)
+        buffer_out = [write_value] * (end - start)
+        result = self._port.exchange(buffer_out, end - start, duplex=True)

         for i, b in enumerate(result):
             buf[start + i] = b
 
         for i, b in enumerate(result):
             buf[start + i] = b