add mcpnack for tyeth to test

[Adafruit_Blinka-hackapet.git] / src / adafruit_blinka / microcontroller / mcp2221 / mcp2221.py

diff --git a/src/adafruit_blinka/microcontroller/mcp2221/mcp2221.py b/src/adafruit_blinka/microcontroller/mcp2221/mcp2221.py
index 5ff027ab2803df4957508ee388cef9016c1f80e8..8e76cc7127a51f3aaf1baa0bf3b131bcd2f51ca5 100644 (file)
--- a/src/adafruit_blinka/microcontroller/mcp2221/mcp2221.py
+++ b/src/adafruit_blinka/microcontroller/mcp2221/mcp2221.py
@@ -133,6 +133,7 @@ class MCP2221:
 
     def _reset(self):
         self._hid_xfer(b"\x70\xAB\xCD\xEF", response=False)
+        self._hid.close()
         time.sleep(MCP2221_RESET_DELAY)
         start = time.monotonic()
         while time.monotonic() - start < 5:
@@ -247,7 +248,7 @@ class MCP2221:
         for _ in range(MCP2221_RETRY_MAX):
             status = self._i2c_status()
             if status[20] & MASK_ADDR_NACK:
-                raise RuntimeError("I2C slave address was NACK'd")
+                raise OSError("I2C slave address was NACK'd")
             usb_cmd_status = status[8]
             if usb_cmd_status == 0:
                 break