X-Git-Url: https://git.ayoreis.com/Adafruit_Blinka-hackapet.git/blobdiff_plain/a575c4ba6016c3fdedfe0e33e08ba297c7fe754d..a9ee7f0410d4b718a4f3c4f82ec7bdae98a176d6:/src/bitbangio.py

diff --git a/src/bitbangio.py b/src/bitbangio.py
old mode 100644
new mode 100755
index 29698da..c4ffcfb
--- a/src/bitbangio.py
+++ b/src/bitbangio.py
@@ -1,16 +1,28 @@
-from adafruit_blinka import Lockable
-from machine import I2C as _I2C
-from machine import Pin
+"""
+`bitbangio` - Bitbanged bus protocols
+==============================================================
+
+See `CircuitPython:bitbangio` in CircuitPython for more details.
+
+* Author(s): cefn
+"""
+
+from adafruit_blinka import Lockable, agnostic
+import adafruit_platformdetect.board as ap_board
 
 
 class I2C(Lockable):
     def __init__(self, scl, sda, frequency=400000):
-        super().__init()
+        # TODO: This one is a bit questionable:
+        if agnostic.board_id == ap_board.PYBOARD:
+            raise NotImplementedError("No software I2C on {}".format(agnostic.board_id))
         self.init(scl, sda, frequency)
 
     def init(self, scl, sda, frequency):
+        from machine import Pin
+        from machine import I2C as _I2C
         self.deinit()
-        id = -1 # force bitbanging implementation - in future introspect platform if SDA/SCL matches hardware I2C
+        id = -1  # force bitbanging implementation - in future introspect platform if SDA/SCL matches hardware I2C
         self._i2c = _I2C(id, Pin(scl.id), Pin(sda.id), freq=frequency)
 
     def deinit(self):
@@ -33,27 +45,39 @@ class I2C(Lockable):
             if end is None:
                 end = len(buffer)
             buffer = memoryview(buffer)[start:end]
-        stop = True # remove for efficiency later
+        stop = True  # remove for efficiency later
         return self._i2c.readfrom_into(address, buffer, stop)
 
-    def writeto(self, address, buffer, start=0, end=None, stop=True, *a, **k):
+    def writeto(self, address, buffer, start=0, end=None, stop=True):
         if start is not 0 or end is not None:
             if end is None:
-                end = len(buffer)
-            buffer = memoryview(buffer)[start:end]
+                return self._i2c.writeto(address, memoryview(buffer)[start:], stop)
+            else:
+                return self._i2c.writeto(address, memoryview(buffer)[start:end], stop)
         return self._i2c.writeto(address, buffer, stop)
 
+
 # TODO untested, as actually busio.SPI was on tasklist https://github.com/adafruit/Adafruit_Micropython_Blinka/issues/2 :(
 class SPI(Lockable):
     def __init__(self, clock, MOSI=None, MISO=None):
+        from machine import SPI
         self._spi = SPI(-1)
-        self._pins = (clock.id, MOSI.id, MISO.id)
+        self._pins = (clock, MOSI, MISO)
 
     def configure(self, baudrate=100000, polarity=0, phase=0, bits=8):
+        from machine import SPI,Pin
         if self._locked:
             # TODO verify if _spi obj 'caches' sck, mosi, miso to avoid storing in _attributeIds (duplicated in busio)
             # i.e. #init ignores MOSI=None rather than unsetting
-            self._spi.init(baudrate=baudrate, polarity=polarity, phase=phase, bits = bits, firstbit = SPI.MSB, sck = Pin(self._pins[0]), mosi=Pin(self._pins[1]), miso=Pin(self._pins[2]))
+            self._spi.init(
+                baudrate=baudrate,
+                polarity=polarity,
+                phase=phase,
+                bits=bits,
+                firstbit=SPI.MSB,
+                sck=Pin(self._pins[0].id),
+                mosi=Pin(self._pins[1].id),
+                miso=Pin(self._pins[2].id))
         else:
             raise RuntimeError("First call try_lock()")
 
@@ -63,5 +87,5 @@ class SPI(Lockable):
     def readinto(self, buf):
         return self.readinto(buf)
 
-    def write_readinto(self, buffer_out, buffer_in)
+    def write_readinto(self, buffer_out, buffer_in):
         return self.write_readinto(buffer_out, buffer_in)