Merge pull request #276 from makermelissa/master

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

diff --git a/src/adafruit_blinka/microcontroller/nova/spi.py b/src/adafruit_blinka/microcontroller/nova/spi.py
index d92d2d7698eaf877d6468a5d6191302b9012e3b0..ce61fd631d48f5594830052ce8f0b828c7bcb44b 100644 (file)
--- a/src/adafruit_blinka/microcontroller/nova/spi.py
+++ b/src/adafruit_blinka/microcontroller/nova/spi.py
@@ -1,52 +1,64 @@
-#from adafruit_blinka.microcontroller.nova.pin import Pin
+"""SPI Class for Binho Nova"""
+from adafruit_blinka.microcontroller.nova import Connection
+

 
 class SPI:
 
 class SPI:

+    """Custom SPI Class for Binho Nova"""
+
+    MSB = 0

     PAYLOAD_MAX_LENGTH = 64
 
     def __init__(self, clock):
     PAYLOAD_MAX_LENGTH = 64
 
     def __init__(self, clock):

-        from binhoHostAdapter import binhoHostAdapter
-        from binhoHostAdapter import binhoUtilities
-
-        utilities = binhoUtilities.binhoUtilities()
-        devices = utilities.listAvailableDevices()
+        self._nova = Connection.getInstance()
+        self._nova.setNumericalBase(10)
+        self._nova.setOperationMode(0, "SPI")
+        self._nova.setClockSPI(0, clock)
+        self._nova.setModeSPI(0, 0)
+        self._nova.setIOpinMode(0, "DOUT")
+        self._nova.setIOpinMode(1, "DOUT")
+        self._nova.beginSPI(0)

 
 

-        if len(devices) > 0:
-            self._nova = binhoHostAdapter.binhoHostAdapter(devices[0])
-            self._nova.setOperationMode(0, 'SPI')
-            self._nova.setClockSPI(0, clock)
-            self._nova.setModeSPI(0, 0)
-            self._nova.setIOpinMode(0, 'DOUT')
-            self._nova.setIOpinValue(0, 'HIGH')
-            self._nova.beginSPI(0)
-            # Cpol and Cpha set by mode
-            # Mode  Cpol Cpha
-            #  0     0    0
-            #  1     0    1
-            #  2     1    0
-            #  3     1    1
+        # Cpol and Cpha set by mode
+        # Mode  Cpol Cpha
+        #  0     0    0
+        #  1     0    1
+        #  2     1    0
+        #  3     1    1

 
 

-        else:
-            raise RuntimeError('No Binho host adapter found!')
-
-    def init(self, baudrate=100000, polarity=0, phase=0, bits=8,
-                  firstbit=MSB, sck=None, mosi=None, miso=None):
-        print("baudrate: " + baudrate)
-        print("mode: " + (polarity<<1) | (phase))
+    # pylint: disable=too-many-arguments,unused-argument
+    def init(
+        self,
+        baudrate=100000,
+        polarity=0,
+        phase=0,
+        bits=8,
+        firstbit=MSB,
+        sck=None,
+        mosi=None,
+        miso=None,
+    ):
+        """Initialize the Port"""
+        # print("baudrate: " + str(baudrate))
+        # print("mode: " + str((polarity<<1) | (phase)))

         self._nova.setClockSPI(0, baudrate)
         self._nova.setClockSPI(0, baudrate)

-        self._nova.setModeSPI(0, (polarity<<1) | (phase))
+        self._nova.setModeSPI(0, (polarity << 1) | (phase))
+
+    # pylint: enable=too-many-arguments,unused-argument

 
     @staticmethod
 
     @staticmethod

-    def getSpiReceivedData(lineOutput):
-        return (lineOutput.split('RXD ')[1])
+    def get_received_data(lineOutput):
+        """Return any received data"""
+        return lineOutput.split("RXD ")[1]

 
     @property
     def frequency(self):
 
     @property
     def frequency(self):

-        return self._nova.getClockSPI(0).split('CLK ')[1]
+        """Return the current frequency"""
+        return self._nova.getClockSPI(0).split("CLK ")[1]

 
     def write(self, buf, start=0, end=None):
 
     def write(self, buf, start=0, end=None):

+        """Write data from the buffer to SPI"""

         end = end if end else len(buf)
         chunks, rest = divmod(end - start, self.PAYLOAD_MAX_LENGTH)
         end = end if end else len(buf)
         chunks, rest = divmod(end - start, self.PAYLOAD_MAX_LENGTH)

-        self._nova.setIOpinValue(0, 'LOW')

         for i in range(chunks):
             chunk_start = start + i * self.PAYLOAD_MAX_LENGTH
             chunk_end = chunk_start + self.PAYLOAD_MAX_LENGTH
         for i in range(chunks):
             chunk_start = start + i * self.PAYLOAD_MAX_LENGTH
             chunk_end = chunk_start + self.PAYLOAD_MAX_LENGTH


@@ -55,35 +67,40 @@ class SPI:
             self._nova.writeToBuffer(0, 0, buffer_data)
             self._nova.transferBufferSPI(0, chunk_end - chunk_start + 1)
         if rest:
             self._nova.writeToBuffer(0, 0, buffer_data)
             self._nova.transferBufferSPI(0, chunk_end - chunk_start + 1)
         if rest:

-            buffer_data = buf[-1*rest:]
+            buffer_data = buf[-1 * rest :]

             self._nova.clearBuffer(0)
             self._nova.writeToBuffer(0, 0, buffer_data)
             self._nova.transferBufferSPI(0, rest)
             self._nova.clearBuffer(0)
             self._nova.writeToBuffer(0, 0, buffer_data)
             self._nova.transferBufferSPI(0, rest)

-        self._nova.setIOpinValue(0, 'HIGH')
-        print(self._nova.readBuffer(0, 4))

 
     def readinto(self, buf, start=0, end=None, write_value=0):
 
     def readinto(self, buf, start=0, end=None, write_value=0):

+        """Read data from SPI and into the buffer"""

         end = end if end else len(buf)
         end = end if end else len(buf)

-        self._nova.setIOpinValue(0, 'LOW')

         for i in range(start, end):
         for i in range(start, end):

-            buf[start+i] = int(self.getSpiReceivedData(self._nova.transferSPI(0, write_value)), 16)
-        self._nova.setIOpinValue(0, 'HIGH')
+            buf[start + i] = int(
+                self.get_received_data(self._nova.transferSPI(0, write_value))
+            )

 
 

-    def write_readinto(self, buffer_out, buffer_in,  out_start=0, out_end=None, in_start=0, in_end=None):
+    # 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
+        """

         out_end = out_end if out_end else len(buffer_out)
         in_end = in_end if in_end else len(buffer_in)
         out_end = out_end if out_end else len(buffer_out)
         in_end = in_end if in_end else len(buffer_in)

-        readlen = in_end-in_start
-        writelen = out_end-out_start
+        readlen = in_end - in_start
+        writelen = out_end - out_start

         if readlen > writelen:
             # resize out and pad with 0's
             tmp = bytearray(buffer_out)
             tmp.extend([0] * (readlen - len(buffer_out)))
             buffer_out = tmp
         i = 0
         if readlen > writelen:
             # resize out and pad with 0's
             tmp = bytearray(buffer_out)
             tmp.extend([0] * (readlen - len(buffer_out)))
             buffer_out = tmp
         i = 0

-        self._nova.setIOpinValue(0, 'LOW')

         for data_out in buffer_out:
         for data_out in buffer_out:

-            data_in = int(self.getSpiReceivedData(self._nova.transferSPI(0, data_out)), 16)
+            data_in = int(self.get_received_data(self._nova.transferSPI(0, data_out)))

             if i < readlen:
             if i < readlen:

-                buffer_in[in_start+i] = data_in
+                buffer_in[in_start + i] = data_in

             i += 1
             i += 1

-        self._nova.setIOpinValue(0, 'HIGH')
+
+    # pylint: enable=too-many-arguments