Troubleshooting

This guide helps you diagnose and solve common issues with the DeviceAccess Python bindings.

Performance Issues

Read/Write Operations Slow

Diagnosis:

  1. Are you creating accessors repeatedly?

    # Bad: Create accessor in loop
for i in range(1000):
    register = device.getScalarRegisterAccessor(int, "VALUE")  # Slow!
    register.read()

# Good: Reuse accessor
register = device.getScalarRegisterAccessor(int,"VALUE")
for i in range(1000):
    register.read()

  2. Are you making unnecessary hardware calls?

    # Bad: Multiple reads for same data
register.read()
for i in range(100):
    register.read()  # Unnecessary!

# Good: Read once
register.read()
value = float(register)
for i in range(100):
    # Use value, don't read again

Solutions:

  • Reuse accessors

  • Minimize hardware access operations

  • Cache data between reads if appropriate

Getting Help

When reporting issues, include:

  1. Python version: python --version

  2. Library version: apt show python3-mtca4upy

  3. OS and platform: uname -a

  4. Complete error message and traceback

  5. Device map file (sanitized)

  6. Minimal reproducible example

Report to:

See Also