Google Coral support for the i2c, spi, and GPIO pins. uart #3 not available and remai...

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

diff --git a/src/busio.py b/src/busio.py
index f5a93af68fb1ed80de83f04185a7e29961f2ed85..0928b870a98a930190633b1d0caf014790675c53 100755 (executable)
--- a/src/busio.py
+++ b/src/busio.py
@@ -8,24 +8,16 @@ See `CircuitPython:busio` in CircuitPython for more details.
 """
 
 from adafruit_blinka import Enum, Lockable, agnostic
-from adafruit_blinka.agnostic import board_id
+from adafruit_blinka.agnostic import board_id, detector
 import adafruit_platformdetect.board as ap_board
 
-EMBEDDED_LINUX_BOARDS = (
-    ap_board.RASPBERRY_PI_2B,
-    ap_board.RASPBERRY_PI_3B,
-    ap_board.RASPBERRY_PI_3B_PLUS,
-    ap_board.BEAGLEBONE_BLACK,
-    ap_board.ORANGE_PI_PC,
-)
-
 class I2C(Lockable):
     def __init__(self, scl, sda, frequency=400000):
         self.init(scl, sda, frequency)
 
     def init(self, scl, sda, frequency):
         self.deinit()
-        if board_id in EMBEDDED_LINUX_BOARDS:
+        if detector.board.any_embedded_linux:
             from adafruit_blinka.microcontroller.generic_linux.i2c import I2C as _I2C
         else:
             from machine import I2C as _I2C
@@ -80,7 +72,7 @@ class I2C(Lockable):
 class SPI(Lockable):
     def __init__(self, clock, MOSI=None, MISO=None):
         self.deinit()
-        if board_id in EMBEDDED_LINUX_BOARDS:
+        if detector.board.any_embedded_linux:
             from adafruit_blinka.microcontroller.generic_linux.spi import SPI as _SPI
         else:
             from machine import SPI as _SPI
@@ -98,15 +90,21 @@ class SPI(Lockable):
                 format((clock, MOSI, MISO), spiPorts))
 
     def configure(self, baudrate=100000, polarity=0, phase=0, bits=8):
-        if board_id in ap_board.ANY_RASPBERRY_PI_2_OR_3:
+        if detector.board.any_raspberry_pi:
             from adafruit_blinka.microcontroller.bcm283x.pin import Pin
             from adafruit_blinka.microcontroller.generic_linux.spi import SPI as _SPI
-        elif board_id == ap_board.BEAGLEBONE_BLACK:
+        elif detector.board.any_beaglebone:
             from adafruit_blinka.microcontroller.am335x.pin import Pin
             from adafruit_blinka.microcontroller.generic_linux.spi import SPI as _SPI
         elif board_id == ap_board.ORANGE_PI_PC:
             from adafruit_blinka.microcontroller.allwinner_h3.pin import Pin
             from adafruit_blinka.microcontroller.generic_linux.spi import SPI as _SPI
+        elif board_id == ap_board.GIANT_BOARD:
+            from adafruit_blinka.microcontroller.sama5.pin import Pin
+            from adafruit_blinka.microcontroller.generic_linux.spi import SPI as _SPI
+        elif board_id == ap_board.CORAL_EDGE_TPU_DEV:
+            from adafruit_blinka.microcontroller.nxp_imx8m.pin import Pin
+            from adafruit_blinka.microcontroller.generic_linux.spi import SPI as _SPI
         else:
             from machine import SPI as _SPI
             from machine import Pin
@@ -134,7 +132,7 @@ class SPI(Lockable):
         return self._spi.write(buf, start, end)
 
     def readinto(self, buf, start=0, end=None, write_value=0):
-        return self._spi.readinto(buf, start, end)
+        return self._spi.readinto(buf, start, end, write_value=write_value)
 
     def write_readinto(self, buffer_out, buffer_in,  out_start=0, out_end=None, in_start=0, in_end=None):
         return self._spi.write_readinto(buffer_out, buffer_in, out_start, out_end, in_start, in_end)
@@ -157,7 +155,10 @@ class UART(Lockable):
                  timeout=1000,
                  receiver_buffer_size=64,
                  flow=None):
-        from machine import UART as _UART
+        if detector.board.any_embedded_linux:
+            raise RuntimeError('busio.UART not supported on this platform. Please use pyserial instead.')
+        else:
+            from machine import UART as _UART
         from microcontroller.pin import uartPorts
 
         self.baudrate = baudrate