'debug.md'

test/test_i2c.py

@@ -0,0 +1,61 @@
+#!/usr/bin/env python3
+# test_i2c_devices.py
+
+import os
+from maix import i2c
+
+def list_i2c_devices():
+    """List available I2C device nodes"""
+    print("Available I2C devices:")
+    
+    # Check /dev directory
+    try:
+        dev_files = os.listdir("/dev")
+        i2c_devices = [f for f in dev_files if "i2c" in f]
+        if i2c_devices:
+            for dev in sorted(i2c_devices):
+                print(f"  /dev/{dev}")
+        else:
+            print("  No /dev/i2c-* devices found!")
+    except Exception as e:
+        print(f"  Error listing /dev: {e}")
+
+def try_i2c_bus(bus_num):
+    """Try to initialize an I2C bus"""
+    try:
+        bus = i2c.I2C(bus_num, i2c.Mode.MASTER)
+        print(f"  I2C bus {bus_num}: OK")
+        return True
+    except RuntimeError as e:
+        print(f"  I2C bus {bus_num}: {e}")
+        return False
+    except Exception as e:
+        print(f"  I2C bus {bus_num}: Unexpected error: {e}")
+        return False
+
+def main():
+    print("=" * 60)
+    print("I2C Device Diagnostic")
+    print("=" * 60)
+    
+    # List kernel devices
+    list_i2c_devices()
+    
+    # Try common bus numbers
+    print("\nTesting I2C buses:")
+    working_buses = []
+    for bus_num in range(10):
+        if try_i2c_bus(bus_num):
+            working_buses.append(bus_num)
+    
+    print(f"\nWorking buses: {working_buses}")
+    
+    if not working_buses:
+        print("\nERROR: No I2C buses available!")
+        print("Possible causes:")
+        print("  1. I2C kernel driver not loaded")
+        print("  2. Device tree doesn't enable I2C")
+        print("  3. Different kernel version with different device naming")
+
+if __name__ == "__main__":
+    main()