first pass at a setup.py

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

diff --git a/src/bitbangio.py b/src/bitbangio.py
index 0dbeb82addba340e7777ef417e48fbd8dd328fad..101bfff0412ba655275b12f3a7fd51a17d178a66 100644 (file)
--- a/src/bitbangio.py
+++ b/src/bitbangio.py
@@ -1,15 +1,17 @@
-from adafruit_blinka import Lockable
-from machine import I2C as _I2C
-from machine import Pin
+from adafruit_blinka import Lockable, agnostic

 
 
 class I2C(Lockable):
     def __init__(self, scl, sda, frequency=400000):
 
 
 class I2C(Lockable):
     def __init__(self, scl, sda, frequency=400000):

+        if agnostic.microcontroller == "stm32":
+            raise NotImplementedError("No software I2C on {}".format(agnostic.board))

         self.init(scl, sda, frequency)
 
     def init(self, scl, sda, frequency):
         self.init(scl, sda, frequency)
 
     def init(self, scl, sda, frequency):

+        from machine import Pin
+        from machine import I2C as _I2C

         self.deinit()
         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):
         self._i2c = _I2C(id, Pin(scl.id), Pin(sda.id), freq=frequency)
 
     def deinit(self):


@@ -32,27 +34,39 @@ class I2C(Lockable):
             if end is None:
                 end = len(buffer)
             buffer = memoryview(buffer)[start:end]
             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)
 
         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:
         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)
 
         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):
 # 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._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):
 
     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
         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()")
 
         else:
             raise RuntimeError("First call try_lock()")