X-Git-Url: https://git.ayoreis.com/Adafruit_Blinka-hackapet.git/blobdiff_plain/a79e37b2729f77faf00545062fc4a8ded1a6eb97..c8d79678f137a451e1d6f8f024aa0fa1eb7dd10b:/src/adafruit_blinka/microcontroller/bcm283x/pulseio/PulseIn.py

diff --git a/src/adafruit_blinka/microcontroller/bcm283x/pulseio/PulseIn.py b/src/adafruit_blinka/microcontroller/bcm283x/pulseio/PulseIn.py
index 6b86614..aef942a 100644
--- a/src/adafruit_blinka/microcontroller/bcm283x/pulseio/PulseIn.py
+++ b/src/adafruit_blinka/microcontroller/bcm283x/pulseio/PulseIn.py
@@ -45,7 +45,9 @@ class PulseIn:
                 print("Message Queue Key: ", self._mq.key)
             queues.append(self._mq)
         except sysv_ipc.ExistentialError:
-            raise RuntimeError("Message queue creation failed")
+            raise RuntimeError(
+                "Message queue creation failed"
+            ) from sysv_ipc.ExistentialError
 
         dir_path = os.path.dirname(os.path.realpath(__file__))
         cmd = [
@@ -85,7 +87,9 @@ class PulseIn:
             except sysv_ipc.BusyError:
                 time.sleep(0.001)  # wait a bit then retry!
         # uh-oh timed out
-        raise RuntimeError("Timed out waiting for PulseIn message")
+        raise RuntimeError(
+            "Timed out waiting for PulseIn message. Make sure libgpiod is installed."
+        )
 
     # pylint: enable=redefined-builtin