caroa04 0.1.2

Library to control the CAROA04 CAN-IO expander device from eletechsup.

Library to control the CAROA04 CAN-IO expander device from eletechsup.

• Free software: MIT license

• Documentation: https://caroa04.readthedocs.io.

Installation

You can install “caroa04” via pip from PyPI:

$ pip install caroao4

Usage

from caroa04 import CaroA04

caro = CaroA04()
caro.start(0xE0, 'pcan', 250000, 'PCAN_USBBUS1')  # start communication

caro.do1.phys = True  # set do1 state to True
print(caro.do1.phys)  # read do1 state
print(caro.di1.phys)  # read di1 state

print(caro.bitrate.phys)  # read current bitrate
caro.bitrate.phys = 500000  # set different baudrate (will require device power cycle)

print(caro.node_id.phys)  # read current address code
caro.node_id.phys = 0xE1  # set address code (will require device power cycle)

caro.shutdown()  # free the bus

Features

• This library uses the python-can library to communicate with the device.

• The device has 4 digital outputs and 4 digital inputs. Hence the signals can be read/written by using the attributes of the CaroA04 class:

  • do1, do2, do3, do4 : digital output 1 to digital output 4

  • di1, di2, di3, di4 : digital input 1 to digital input 4

  • bitrate, node_id : bitrate and address code of the device

• Each signal has a raw value and a physical value. For example, the device does not understand a bitrate in bps. It expects an enumeration that it will interpret. So it can either be set by writing its physical value (bitrate.phys = 250000) or by writing its raw value (bitrate.raw) as follows:

  • 0: 5 kbps

  • 1: 10 kbps

  • 2: 20 kbps

  • 3: 50 kbps

  • 4: 100 kbps

  • 5: 120 kbps

  • 6: 200 kbps

  • 7: 250 kbps

  • 8: 400 kbps

  • 9: 500 kbps

  • 10: 800 kbps

  • 11: 1000 kbps

Credits

This package was created with Cookiecutter and the audreyr/cookiecutter-pypackage project template.