Increase host timeout from 1 second to 20.

Author: Bob Abeles

adafruit_hid/consumer_control.py

@@ -44,12 +44,14 @@ def __init__(self, devices: Sequence[usb_hid.Device]) -> None:
         self._report = bytearray(2)
 
         # Do a no-op to test if HID device is ready.
-        # If not, wait a bit and try once more.
-        try:
-            self.send(0x0)
-        except OSError:
-            time.sleep(1)
-            self.send(0x0)
+        # Some hosts take awhile to enumerate after POR, so retry a few times.
+        for _ in range(20):
+            try:
+                self.send(0x0)
+                return
+            except OSError:
+                time.sleep(1.0)
+        raise OSError("HID device init timeout.")
 
     def send(self, consumer_code: int) -> None:
         """Send a report to do the specified consumer control action,

adafruit_hid/keyboard.py

@@ -66,13 +66,15 @@ def __init__(self, devices: Sequence[usb_hid.Device]) -> None:
         self._led_status = b"\x00"
 
         # Do a no-op to test if HID device is ready.
-        # If not, wait a bit and try once more.
-        try:
-            self.release_all()
-        except OSError:
-            time.sleep(1)
-            self.release_all()
-
+        # Some hosts take awhile to enumerate after POR, so retry a few times.
+        for _ in range(20):
+            try:
+                self.release_all()
+                return
+            except OSError:
+                time.sleep(1.0)
+        raise OSError("HID device init timeout.")
+    
     def press(self, *keycodes: int) -> None:
         """Send a report indicating that the given keys have been pressed.
 

adafruit_hid/mouse.py

@@ -46,12 +46,14 @@ def __init__(self, devices: Sequence[usb_hid.Device]):
         self.report = bytearray(4)
 
         # Do a no-op to test if HID device is ready.
-        # If not, wait a bit and try once more.
-        try:
-            self._send_no_move()
-        except OSError:
-            time.sleep(1)
-            self._send_no_move()
+        # Some hosts take awhile to enumerate after POR, so retry a few times.
+        for _ in range(20):
+            try:
+                self._send_no_move()
+                return
+            except OSError:
+                time.sleep(1.0)
+        raise OSError("HID device init timeout.")
 
     def press(self, buttons: int) -> None:
         """Press the given mouse buttons.