i2c

[Adafruit_Blinka-hackapet.git] / src / busio.py

diff --git a/src/busio.py b/src/busio.py
index 9d2199633823138705bee76229b901b598389f5a..08761c4c137b367d708655adf3365512bd3f4b3f 100644 (file)
--- a/src/busio.py
+++ b/src/busio.py
@@ -9,7 +9,7 @@ See `CircuitPython:busio` in CircuitPython for more details.
 
 * Author(s): cefn
 """
-
+import os
 try:
     import threading
 except ImportError:
@@ -54,6 +54,13 @@ class I2C(Lockable):
 
             self._i2c = _I2C(frequency=frequency)
             return
+
+        if "BLINKA_FORCECHIP" in os.environ and os.environ["BLINKA_FORCEBOARD"] == "GENERIC_AGNOSTIC_BOARD":
+            from adafruit_blinka.microcontroller.generic_agnostic_board.i2c import I2C as _I2C
+
+            self._i2c = _I2C(frequency=frequency)
+            return
+
         if detector.board.greatfet_one:
             from adafruit_blinka.microcontroller.nxp_lpc4330.i2c import I2C as _I2C
 
@@ -194,18 +201,17 @@ class I2C(Lockable):
             if end is None:
                 end = len(buffer)
             buffer = memoryview(buffer)[start:end]
-        stop = True  # remove for efficiency later
-        return self._i2c.readfrom_into(address, buffer, stop=stop)
+        return self._i2c.readfrom_into(address, buffer, stop=True)
 
-    def writeto(self, address, buffer, *, start=0, end=None, stop=True):
+    def writeto(self, address, buffer, *, start=0, end=None):
         """Write to a device at specified address from a buffer"""
         if isinstance(buffer, str):
             buffer = bytes([ord(x) for x in buffer])
         if start != 0 or end is not None:
             if end is None:
-                return self._i2c.writeto(address, memoryview(buffer)[start:], stop=stop)
-            return self._i2c.writeto(address, memoryview(buffer)[start:end], stop=stop)
-        return self._i2c.writeto(address, buffer, stop=stop)
+                return self._i2c.writeto(address, memoryview(buffer)[start:], stop=True)
+            return self._i2c.writeto(address, memoryview(buffer)[start:end], stop=True)
+        return self._i2c.writeto(address, buffer, stop=True)
 
     def writeto_then_readfrom(
         self,