ft232h: Fix SPI.readinto's write_value= argument

[hackapet/Adafruit_Blinka.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 bd4a53be1b435e20ab7e0cb9ba72379ee789a5a0..af164e97b92929ea86550af0f3b321092271acc8 100644 (file)
--- a/src/adafruit_blinka/microcontroller/ft232h/spi.py
+++ b/src/adafruit_blinka/microcontroller/ft232h/spi.py
@@ -22,7 +22,7 @@ class SPI:
         # 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,
@@ -60,13 +60,17 @@ class SPI:
             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)
-        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