From: Lady Ada <limor@ladyada.net>
Date: Sat, 7 Dec 2019 02:20:19 +0000 (-0500)
Subject: fix i2c scan
X-Git-Tag: 3.2.0^2
X-Git-Url: https://git.ayoreis.com/Adafruit_Blinka-hackapet.git/commitdiff_plain/b7889ed69430e42a42b1c3d58a6745f700755370

fix i2c scan
---

diff --git a/src/adafruit_blinka/microcontroller/mcp2221/mcp2221.py b/src/adafruit_blinka/microcontroller/mcp2221/mcp2221.py
index bd44474..aae81e5 100644
--- a/src/adafruit_blinka/microcontroller/mcp2221/mcp2221.py
+++ b/src/adafruit_blinka/microcontroller/mcp2221/mcp2221.py
@@ -279,12 +279,12 @@ class MCP2221:
         found = []
         for addr in range(start, end+1):
             # try a write
-            self.i2c_writeto(addr, b'\x00')
+            try:
+                self.i2c_writeto(addr, b'\x00')
+            except RuntimeError: # no reply!
+                continue
             # store if success
-            if self._i2c_status() == 0x00:
-                found.append(addr)
-            # cancel and continue
-            self._i2c_cancel()
+            found.append(addr)
         return found
 
     #----------------------------------------------------------------