From: Limor "Ladyada" Fried <limor@ladyada.net>
Date: Thu, 14 Nov 2019 18:52:29 +0000 (-0500)
Subject: Merge pull request #173 from caternuson/iss172
X-Git-Tag: 3.0.1
X-Git-Url: https://git.ayoreis.com/Adafruit_Blinka-hackapet.git/commitdiff_plain/8a4686cbc7ebd7f338f64517fa42db4dc5b5c78c?hp=cf07b4274fcc74fd3b2b28a0dfe3d2ad7ce18ebe

Merge pull request #173 from caternuson/iss172

Add SPI phase check to FT232H
---

diff --git a/src/adafruit_blinka/microcontroller/ft232h/spi.py b/src/adafruit_blinka/microcontroller/ft232h/spi.py
index 2d42ae0..a260e72 100644
--- a/src/adafruit_blinka/microcontroller/ft232h/spi.py
+++ b/src/adafruit_blinka/microcontroller/ft232h/spi.py
@@ -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