Fix MicroPython and busio

[Adafruit_Blinka-hackapet.git] / src / adafruit_blinka / microcontroller / generic_micropython / spi.py

diff --git a/src/adafruit_blinka/microcontroller/generic_micropython/spi.py b/src/adafruit_blinka/microcontroller/generic_micropython/spi.py
new file mode 100755 (executable)
index 0000000..7842a19
--- /dev/null
+++ b/src/adafruit_blinka/microcontroller/generic_micropython/spi.py
@@ -0,0 +1,66 @@
+"""SPI Class for Generic MicroPython"""
+from machine import SPI as _SPI
+
+# pylint: disable=protected-access, no-self-use
+class SPI:
+    """SPI Class for Generic MicroPython"""
+
+    MSB = _SPI.MSB
+    LSB = _SPI.LSB
+
+    def __init__(self, portId, baudrate=100000):
+        self._frequency = baudrate
+        self._spi = _SPI(portId)
+
+    # pylint: disable=too-many-arguments,unused-argument
+    def init(
+        self,
+        baudrate=1000000,
+        polarity=0,
+        phase=0,
+        bits=8,
+        firstbit=_SPI.MSB,
+    ):
+        """Initialize the Port"""
+        self._frequency = baudrate
+        self._spi.init(
+            baudrate=baudrate,
+            polarity=polarity,
+            phase=phase,
+            bits=bits,
+            firstbit=firstbit,
+            mode=_SPI.MASTER,
+        )
+
+    # pylint: enable=too-many-arguments
+
+    @property
+    def frequency(self):
+        """Return the current frequency"""
+        return self._frequency
+
+    def write(self, buf, start=0, end=None):
+        """Write data from the buffer to SPI"""
+        self._spi.write(buf)
+
+    def readinto(self, buf, start=0, end=None, write_value=0):
+        """Read data from SPI and into the buffer"""
+        self._spi.readinto(buf)
+
+    # pylint: disable=too-many-arguments
+    def write_readinto(
+        self, buffer_out, buffer_in, out_start=0, out_end=None, in_start=0, in_end=None
+    ):
+        """Perform a half-duplex write from buffer_out and then
+        read data into buffer_in
+        """
+        self._spi.write_readinto(
+            buffer_out,
+            buffer_in,
+            out_start=out_start,
+            out_end=out_end,
+            in_start=in_start,
+            in_end=in_end,
+        )
+
+    # pylint: enable=too-many-arguments