add i2c scanning

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

diff --git a/src/busio.py b/src/busio.py
old mode 100644 (file)
new mode 100755 (executable)
index a02eccf..3d786ac
--- a/src/busio.py
+++ b/src/busio.py
@@ -1,4 +1,14 @@
+"""
+`busio` - Bus protocol support like I2C and SPI
+=================================================
+
+See `CircuitPython:busio` in CircuitPython for more details.
+
+* Author(s): cefn
+"""
+
 from adafruit_blinka import Enum, Lockable, agnostic
+from adafruit_blinka.agnostic import board as boardId
 
 class I2C(Lockable):
     def __init__(self, scl, sda, frequency=400000):
@@ -6,11 +16,14 @@ class I2C(Lockable):
 
     def init(self, scl, sda, frequency):
         self.deinit()
-        from machine import I2C as _I2C
+        if boardId == "raspi_3" or boardId == "raspi_2":
+            from adafruit_blinka.microcontroller.raspi_23.i2c import I2C as _I2C
+        else:
+            from machine import I2C as _I2C
         from microcontroller.pin import i2cPorts
         for portId, portScl, portSda in i2cPorts:
             if scl == portScl and sda == portSda:
-                self._i2c = I2C(portId, mode=_I2C.MASTER, baudrate=frequency)
+                self._i2c = _I2C(portId, mode=_I2C.MASTER, baudrate=frequency)
                 break
         else:
             raise NotImplementedError("No Hardware I2C on (scl,sda)={}\nValid UART ports".format(
@@ -99,7 +112,6 @@ class UART(Lockable):
     Parity.ODD = Parity()
     Parity.EVEN = Parity()
 
-    # TODO investigate UART receiver_buffer_size as e.g. read_buf_len in https://github.com/micropython/micropython/blob/3eb0694b97c6a8f0e93b874549aac40d8b78b0e5/ports/stm32/uart.c
     def __init__(self,
                  tx,
                  rx,