From ec3ddd9f3e7a2e6f7114ba2f74448198134b3672 Mon Sep 17 00:00:00 2001
From: Melissa LeBlanc-Williams <melissa@adafruit.com>
Date: Thu, 6 May 2021 13:03:14 -0700
Subject: [PATCH] Set the I2C and SPI singletons only if pins are set

---
 src/board.py | 19 +++++++++++--------
 1 file changed, 11 insertions(+), 8 deletions(-)

diff --git a/src/board.py b/src/board.py
index 45eaed6..9de4172 100755
--- a/src/board.py
+++ b/src/board.py
@@ -224,16 +224,19 @@ elif "sphinx" in sys.modules:
 else:
     raise NotImplementedError("Board not supported {}".format(board_id))
 
+if SCL and SDA:
 
-def I2C():
-    """The singleton I2C interface"""
-    import busio
+    def I2C():
+        """The singleton I2C interface"""
+        import busio
 
-    return busio.I2C(SCL, SDA)
+        return busio.I2C(SCL, SDA)
 
 
-def SPI():
-    """The singleton SPI interface"""
-    import busio
+if SCLK and MOSI and MISO:
 
-    return busio.SPI(SCLK, MOSI, MISO)
+    def SPI():
+        """The singleton SPI interface"""
+        import busio
+
+        return busio.SPI(SCLK, MOSI, MISO)
-- 
2.49.0