Fixes to USB resources handling and documentation

Author: Microchip Technology

CHANGELOG.md

@@ -1,5 +1,12 @@
 # Changelog
 
+## [1.4.1] - July 2025
+
+### Fixed
+- DSG-7940 fixed filtering of MCP2221A kits
+- DSG-7941 fixed releasing of USB devices after use
+- DSG-7933 improved CLI documentation
+
 ## [1.3.0] - July 2025
 
 ### Added

pykitinfo/__init__.py

@@ -45,10 +45,10 @@
 
 # Build number part of version will be replaced by build number from Jenkins.
 # For local builds the build number is 0 and the 'snapshot' is added as Local Version Identifier
-__version__ = "1.3.0.23"
+__version__ = "1.4.1.26"
 
 # The GIT commit ID and build date are generated by Jenkins when building the package
-COMMIT_ID = 'fba2ab15b19cad932719e4c9afc906ab75ad704f'
-BUILD_DATE = '2025-07-16 09:13:39'
+COMMIT_ID = 'c8a955dd7d2162a890d34ce6aca7a5eb73f1cbb2'
+BUILD_DATE = '2025-07-23 11:04:14'
 
 logging.getLogger(__name__).addHandler(logging.NullHandler())

pykitinfo/detect_mcp2221a_tools.py

@@ -23,8 +23,9 @@ def detect_mcp2221a_kits(serial_number=None):
     kits = []
 
     for device in devices:
-        if serial_number and device['serial_number'] and not device['serial_number'].endswith(serial_number):
-            continue
+        if serial_number:
+            if not device['serial_number'] or not device['serial_number'].endswith(serial_number):
+                continue
 
         mapped_port = list(filter(lambda dev: dev['tool'] == device, port_map))
 

pykitinfo/detect_microchip_tools.py

@@ -170,6 +170,7 @@ def list_libusb_tools(serialnumber=None):
                     tools.append(kit)
                 except usb.core.USBError as exc:
                     logger.error("Device VID=0x%04x PID=%04x %s", device.idVendor, device.idProduct, exc)
+        usb.util.dispose_resources(device)
     return tools
 
 

pykitinfo/pykitinfo_cli.py

@@ -103,7 +103,12 @@ def main():
             '''),
         epilog=textwrap.dedent('''\
     Usage examples:
-        
+        Show basic kit information:
+            pykitinfo
+        Show detailed kit information:
+            pykitinfo -l
+        Show basic kit information for kit with serial number that ends with ABCDEFG
+            pykitinfo -s ABCDEFG
             '''))
 
     parser.add_argument("-l", "--long", action="store_true",