Baudzilla 1.0

RS232, RS422 and RS485 test suite
(C) Oden Eriksson
License: GPLv2

NOTE: This whole code base was written by the help of ChatGPT

Baudzilla is a complete serial line diagnostic toolkit that supports RS232, RS422 and RS485. It includes loopback verification, idle bus noise measurement, byte pattern tests, Modbus RTU probing and IEC 60870-5-101 probing.

The project provides three programs:

• baudzilla232
  RS232 bidirectional test tool with modem signal display, pattern tests and optional IEC101 probe on port A.

• baudzilla422
  RS422 loopback and protocol tester with selectable patterns, line noise analysis, Modbus RTU probe and IEC101 probe.

• baudzilla485
  RS485 bus test tool supporting three DE control modes: kernel RS485 driver, GPIO controlled DE pin and manual RTS toggling. Includes loopback, noise tests, Modbus RTU probe and IEC101 probe.

All tools use a common pattern generator with ASCII, hex, random, walking and checkerboard payloads.

Features

• RS232, RS422 and RS485 support
• 8N1 serial configuration
• Pattern based payload tests
• Loopback verification
• Idle line noise detection
• Modbus RTU probe (unit 1, function 3)
• IEC 60870-5-101 fixed frame and GI frame probe
• Baud rate selection or auto sweep (RS232)
• RTS/CTS hardware flow control (RS232)
• Modem control status display (RS232)
• RS485 DE control:
  • Kernel RS485 mode
  • GPIO controlled DE pin
  • Manual RTS toggling
• Logging to file
• Summary reporting (RS232)
• Verbose mode
• Built using standard autotools

Requirements

• GCC or Clang
• Autoconf
• Automake
• Make
• Linux with serial drivers
• Optional for RS485 GPIO mode: access to a GPIO sysfs value file

Building

Extract the tarball and build using autotools: