Merge pull request #247 from yeyeto2788/busio_fix

[Adafruit_Blinka-hackapet.git] / src / adafruit_blinka / microcontroller / ft232h / spi.py

diff --git a/src/adafruit_blinka/microcontroller/ft232h/spi.py b/src/adafruit_blinka/microcontroller/ft232h/spi.py
index 2d42ae0da8d546c9c4132d3e2730c3917e2f546e..e48f2df7c4fbd361ff6387c8a7ca52147f7cb256 100644 (file)
--- a/src/adafruit_blinka/microcontroller/ft232h/spi.py
+++ b/src/adafruit_blinka/microcontroller/ft232h/spi.py
@@ -6,7 +6,7 @@ class SPI:
     def __init__(self):
         from pyftdi.spi import SpiController
         self._spi = SpiController(cs_count=1)
-        self._spi.configure('ftdi:///1')
+        self._spi.configure('ftdi://ftdi:ft232h/1')
         self._port = self._spi.get_port(0)
         self._port.set_frequency(100000)
         self._port._cpol = 0
@@ -17,7 +17,12 @@ class SPI:
     def init(self, baudrate=100000, polarity=0, phase=0, bits=8,
                   firstbit=MSB, sck=None, mosi=None, miso=None):
         self._port.set_frequency(baudrate)
+        # FTDI device can only support mode 0 and mode 2
+        # due to the limitation of MPSSE engine.
+        # This means CPHA must = 0
         self._port._cpol = polarity
+        if phase != 0:
+            raise ValueError("Only SPI phase 0 is supported by FT232H.")
         self._port._cpha = phase
 
     @property