Bumping requirements for release

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

diff --git a/src/adafruit_blinka/microcontroller/generic_linux/spi.py b/src/adafruit_blinka/microcontroller/generic_linux/spi.py
index b90587316536e105499e17d317a2073079b7fb18..520f491cf69558eca6664ad5d546544f9a148e3c 100755 (executable)
--- a/src/adafruit_blinka/microcontroller/generic_linux/spi.py
+++ b/src/adafruit_blinka/microcontroller/generic_linux/spi.py
@@ -1,5 +1,6 @@
-import spidev
+import Adafruit_PureIO.spi as spi
 import time
+from adafruit_blinka.agnostic import detector
 
 class SPI:
     MSB = 0
@@ -12,8 +13,10 @@ class SPI:
     bits = 8
 
     def __init__(self, portid):
-        self._port = portid
-        self._spi = spidev.SpiDev()
+        if isinstance(portid, tuple):
+            self._spi = spi.SPI(device=portid)
+        else:
+            self._spi = spi.SPI(device=(portid, 0))
 
     def init(self, baudrate=100000, polarity=0, phase=0, bits=8,
                   firstbit=MSB, sck=None, mosi=None, miso=None):
@@ -22,13 +25,23 @@ class SPI:
             mode |= self.CPOL
         if phase:
             mode |= self.CPHA
+        self.baudrate = baudrate
+        self.mode = mode
+        self.bits = bits
+        self.chip = detector.chip
 
+        # Pins are not used
         self.clock_pin = sck
         self.mosi_pin = mosi
         self.miso_pin = miso
-        self.baudrate = baudrate
-        self.mode = mode
-        self.bits = bits
+
+    def set_no_cs(self):
+        # No kernel seems to support this, so we're just going to pass
+        pass
+
+    @property
+    def frequency(self):
+        return self.baudrate
 
     def write(self, buf, start=0, end=None):
         if not buf:
@@ -36,38 +49,32 @@ class SPI:
         if end is None:
             end = len(buf)
         try:
-            self._spi.open(self._port, 0)
-            try:
-              self._spi.no_cs = True  # this doesn't work but try anyways
-            except AttributeError:
-              pass
+            #self._spi.open(self._port, 0)
+            self.set_no_cs()
             self._spi.max_speed_hz = self.baudrate
             self._spi.mode = self.mode
             self._spi.bits_per_word = self.bits
-            self._spi.writebytes([x for x in buf[start:end]])
-            self._spi.close()
+            self._spi.writebytes(buf[start:end])
+            #self._spi.close()
         except FileNotFoundError as not_found:
             print("Could not open SPI device - check if SPI is enabled in kernel!")
             raise
 
-    def readinto(self, buf, start=0, end=None):
+    def readinto(self, buf, start=0, end=None, write_value=0):
         if not buf:
             return
         if end is None:
             end = len(buf)
         try:
-            self._spi.open(self._port, 0)
-            try:
-              self._spi.no_cs = True  # this doesn't work but try anyways
-            except AttributeError:
-              pass
+            #self._spi.open(self._port, 0)
+            self.set_no_cs()
             self._spi.max_speed_hz = self.baudrate
             self._spi.mode = self.mode
             self._spi.bits_per_word = self.bits
-            data = self._spi.readbytes(end-start)
+            data = self._spi.transfer([write_value]*(end-start))
             for i in range(end-start):  # 'readinto' the given buffer
               buf[start+i] = data[i]
-            self._spi.close()
+            #self._spi.close()
         except FileNotFoundError as not_found:
             print("Could not open SPI device - check if SPI is enabled in kernel!")
             raise
@@ -77,24 +84,21 @@ class SPI:
         if not buffer_out or not buffer_in:
             return
         if out_end is None:
-            out_end = len(buffer_out)        
+            out_end = len(buffer_out)
         if in_end is None:
             in_end = len(buffer_in)
         if out_end - out_start != in_end - in_start:
             raise RuntimeError('Buffer slices must be of equal length.')
         try:
-            self._spi.open(self._port, 0)
-            try:
-                self._spi.no_cs = True  # this doesn't work but try anyways
-            except AttributeError:
-                pass
+            #self._spi.open(self._port, 0)
+            self.set_no_cs()
             self._spi.max_speed_hz = self.baudrate
             self._spi.mode = self.mode
             self._spi.bits_per_word = self.bits
-            data = self._spi.xfer(list(buffer_out[out_start:out_end+1]))
+            data = self._spi.transfer(list(buffer_out[out_start:out_end+1]))
             for i in range((in_end - in_start)):
                 buffer_in[i+in_start] = data[i]
-            self._spi.close()
+            #self._spi.close()
         except FileNotFoundError as not_found:
             print("Could not open SPI device - check if SPI is enabled in kernel!")
             raise