From: Jeff Epler <jepler@gmail.com>
Date: Thu, 28 Jan 2021 21:59:38 +0000 (-0600)
Subject: ft232h: Fix SPI.readinto's write_value= argument
X-Git-Tag: 6.2.0~1^2~2
X-Git-Url: https://git.ayoreis.com/Adafruit_Blinka-hackapet.git/commitdiff_plain/aed7915007a778b9feb248c576239661e35cb08d?hp=--cc

ft232h: Fix SPI.readinto's write_value= argument

Before, this argument was ignored.  This prevented adafruit_sdcard from
functioning, as it relies on being able to send out the value 0xff.
---

aed7915007a778b9feb248c576239661e35cb08d
diff --git a/src/adafruit_blinka/microcontroller/ft232h/spi.py b/src/adafruit_blinka/microcontroller/ft232h/spi.py
index 81797b3..af164e9 100644
--- a/src/adafruit_blinka/microcontroller/ft232h/spi.py
+++ b/src/adafruit_blinka/microcontroller/ft232h/spi.py
@@ -67,7 +67,10 @@ class SPI:
     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