Merge pull request #728 from makermelissa/raspberrypi-5

[hackapet/Adafruit_Blinka.git] / src / adafruit_blinka / microcontroller / rp2040 / i2c.py

diff --git a/src/adafruit_blinka/microcontroller/rp2040/i2c.py b/src/adafruit_blinka/microcontroller/rp2040/i2c.py
index 785769d7e0035d41a82ba29f40c07e50f697ab81..8daf2490a9c53c934bfa6d2d37cc1f2fc90efd3b 100644 (file)
--- a/src/adafruit_blinka/microcontroller/rp2040/i2c.py
+++ b/src/adafruit_blinka/microcontroller/rp2040/i2c.py
@@ -1,3 +1,6 @@
+# SPDX-FileCopyrightText: 2021 Melissa LeBlanc-Williams for Adafruit Industries
+#
+# SPDX-License-Identifier: MIT

 """I2C Class for RP2040"""
 from machine import I2C as _I2C
 from machine import Pin
 """I2C Class for RP2040"""
 from machine import I2C as _I2C
 from machine import Pin


@@ -46,7 +49,7 @@ class I2C:
         out_end=None,
         in_start=0,
         in_end=None,
         out_end=None,
         in_start=0,
         in_end=None,

-        stop=False
+        stop=False,

     ):
         """Write data from buffer_out to an address and then
         read data from an address and into buffer_in
     ):
         """Write data from buffer_out to an address and then
         read data from an address and into buffer_in


@@ -55,9 +58,8 @@ class I2C:
             self.writeto(address, buffer_out[out_start:out_end], stop=stop)
         else:
             self.writeto(address, buffer_out[out_start:], stop=stop)
             self.writeto(address, buffer_out[out_start:out_end], stop=stop)
         else:
             self.writeto(address, buffer_out[out_start:], stop=stop)

-        read_buffer = buffer_in
+
+        if not in_end:
+            in_end = len(buffer_in)
+        read_buffer = memoryview(buffer_in)[in_start:in_end]

         self.readfrom_into(address, read_buffer, stop=stop)
         self.readfrom_into(address, read_buffer, stop=stop)

-        if in_end:
-            buffer_in[in_start:in_end] = read_buffer[in_start:in_end]
-        else:
-            buffer_in[in_start:] = read_buffer[in_start:]